Re: [Emc-users] Spindle hooked to dc servo amp
On Fri, 20 Jul 2012 13:05:22 -0500, you wrote: Get well soon! If you feel like experimenting - I think you would just change net spindle-position encoder.0.position = motion.spindle-revs to net spindle-position encoder.0.position-interpolated = motion.spindle-revs Thanks Sam - I'll give that a whirl and report back. Feeling much better and can see surprisingly well although I do look like I've gone several rounds with Tyson G. Steve Blackmore -- -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] [Off] Ballscrew Support?
On Fri, 20 Jul 2012 20:00:10 -0400, you wrote: Sag is only the start of the problem. The whip is going to be the real problem. The ballnut is no holp holding it up at the limits of travel. Not strictly true - the size needs to be CAREFULLY calculated for the job in hand and the mounting method needs to be considered. Good ballscrew manufacturers have tables that define limits for their screws, but the examples I've looked at require both ends to be fixed and max rotational speed of around 1000 rpm for a 3m long 25mm ballscrew with loads kept below 2000 Kg. As long as you follow manufacturers specs it isn't going to whip or destroy the ballnut. That said, for a 10ft long screw I'd go bigger than 25mm :) A Google search for ballscrew length versus diameter gives lots of data. www.techno-isel.com/Tic/H834/PDF/H834P011.pd gives some good info. Steve Blackmore -- -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] NFS hassles [Was: Spindle hooked to dc servo amp]
On 20.07.12 10:51, Gene Heskett wrote: On Friday 20 July 2012 10:18:49 Erik Christiansen did opine: Would it help if we again posted some advice on how to most easily change the uids on one host to match another? While that could I suppose be useful when the distro's involved are mix-n- match, I fail to see the utility of it when I am uid:gid 1000 on all 4 machines, all installed from our own 10.04-4 LTS install cd. That's fair, since you've already done all we were suggesting. So that source of trouble has been eliminated. Much more useful would be some real examples that all I'd need to translate would be to my hostnames or even hardcoded addresses. To my knowledge, there does not seem to be a way to make these services startup like a babbling idiot and tell us what they are doing, or why they can't do it. That would be 1000's of times more useful. True. When it's failing, what do the logfiles say? ISTR that it's one of the first places you usually look, admittedly. The nfs-kernel-server package unsurprisingly logs stuff in /var/log/kern.log, and seems to be reasonably talkative, even when things are going well. Without a hint from the logs, we're reduced to shooting in the dark, or at least through a growing cloud of BP smoke of our own making. ATM, my /etc/exports file contains 1 non-commented line: /home/gene/ coyote.coyote.den(rw,sync,no_subtree_check) How does your DNS respond to that hostname, if you try a dig coyote.coyote.den, or if not, does at least ping coyote.coyote.den pick up the right IP address? (i.e. are we certain that the problem is in NFS?) Just for comparison, I've gotten away with nothing more than lines like this in /etc/exports: /export/share 192.168.1.0/24(rw) On all machines with the FQDN of that machine edited in. Similarly, the only active line in /etc/auto.master on all machines is: /net -hosts I've never tried autofs. In this case, it seems to be another potential source of gremlins. Your aversion to editing /etc/fstab is noted, but if we append a line to nfs mount a remote filesystem, it (a) shouldn't interfere with preceding mounts, IIRC, and (b) can be tested before shutting down, by invoking the mount command just with either the filesystem or mountpoint as argument. That will cause its /etc/fstab entry to be used for mounting, and prove the pudding. Once that works, then editing finger-fumbles have been tested, and a reboot need not be feared. (Later, autofs mounting could be tried, if desired, once NFS is known to work.) ... When I was running pclos on this box, with its 2.6.38.8 kernel, this all worked flawlessly except for the uid:gid problems when copying files so I always had to become root and fix that. Ah ... so the other boxes are unchanged, and the problem ought to be on this box. It's still a puzzle, without some logfile or cage-kicking clues. So how do I go about making autofs and nfs-kernel-server get all mouthy so I can see where it fails? Right now it all comes back 'OK' but doesn't actually connect anyplace but on lathe.coyote.den, which does create a /net/lathe subdirectory, but its empty. The /net directories are empty after many restarts of those 2 services in /etc/init.d on the other 2 boxes, this one and shop.coyote.den. Lappy hasn't been out of the case locally in a month or more and ATM is not on my priority list until I need it. Oh, not much is mounting at all? (I'd incorrectly recalled that it only gummed up after some time.) All the more reason for testing nfs without autofs. An IP-address-netmask pair, as worked for me, might also be worth trying. If you can post what happens when the abovementioned sticks are poked into the cage, we'll hopefully be a step closer to identifying the gremlins. Erik -- In 80% aller Software-, Hardware-, etc. Probleme hilft die AEG-Methode: Ausschalten, Einschalten, Geht wieder. OR In 80% of all Software-, Hardware-, etc. problems, the AEG method helps: Switch Off, Switch On, Goes again. (Hmmm ... it's better in the original language.) -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] NFS hassles [Was: Spindle hooked to dc servo amp]
On 20.07.12 12:18, Jon Elson wrote: Erik Christiansen wrote: Would it help if we again posted some advice on how to most easily change the uids on one host to match another? Gee, something like : sudo chown -Rf x:y directory will do most of the job, then you need to make sure the group and owners exist. Edit the file /etc/group and passwd with the right group and user IDs. Yes, but having posted a more verbose version of that last time IDs were a problem, I wasn't going to push it a second time if it wasn't welcome. However, it looks like the IDs are tidied up now, so we're denied that quick fix. Erik -- That's one of the remarkable things about life. It's never so bad that it can't get worse. - Calvin -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Linuxcnc 5 axis coolness
since you probably have a computer, you probably also already have a laser. --- On Fri, 7/20/12, andy pugh bodge...@gmail.com wrote: From: andy pugh bodge...@gmail.com Subject: Re: [Emc-users] Linuxcnc 5 axis coolness To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Date: Friday, July 20, 2012, 3:59 AM On 20 July 2012 11:42, Claude Froidevaux men...@bluewin.ch wrote: sometimes I think of LinuxCNC as a HAL platform, where G-code interpreter is only one module, that can be instantiated if needed. This is something I realised recently too. I have made a start on a GladeVCP GUI which imports an image file, then feeds that to a realtime component that generates an XY raster pattern and synchronised intensity value for laser rastering applications. There is no G-code anywhere in the system. Effectively the image file becomes the program. But as I don't have, nor intend getting, a laser, it has been rather pushed to the back-burner once I proved it could be done :-) -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] [Off] Ballscrew Support?
On 20.07.12 16:18, Jeshua Lacock wrote: I am sure with a 10-foot span that the horizontal ballscrews will sag a little from gravity. Is this much of a concern? Does anyone know of a trick to put some kind of support in the middle of the span? I can't think of any practical way. One method which has been used on very long lathes is one or more pivoting supports holding up the leadscrew. Imagine a cross-drilled rod with a weight on one end. It will hang vertically on a bolt through the hole. Now a segment of an arc (imagine a slim pie-slice of a V-belt pulley) welded on the other end will support the leadscrew in the V, but be pushed aside by the passing leadscrew nut housing, and slide under it, to bob up again when it has passed. While that has been used in industry on older long lathes, it doesn't seem ideal, since a cnc machine is likely to whack into it at speed, or reverse at that one tiny point where the shape of the ballscrew nut housing hasn't quite let it bob up, but sliding back under could be at least high friction, if not an outright jam. Those left/right alternating support legs, where striking the left one from the right causes it to fold down, and pull up the right one behind the leadscrew nut housing, by means of a link, are perhaps also not at their best when struck at speed. I'd be tempted to go for a horizontally retracting flat support, reaching out under the ballscrew from the adjacent frame. Imagine a bit of flat in a long slot, with the corners of the exposed edge cut well back, forming a ramp nearly to the middle of the edge. When the (also heavily chamfered) ballscrew nut housing whizzes by, it progressively pushes the support strip back into the slot in the frame, and progressively re-emerges as it passes. If the slot is deep, smooth, and well lubricated, then the support ought to retract much like that angled spring-loaded brass catch on domestic external doors. (The one which locks you out without your keys, even if only once in life.) If even that is too noisy when hit at speed, then the support could be automatically retracted when the carriage is near (reed switch or optical sensor), either pneumatically or by means of a small motor. In any event, I'd fix a long slender ballscrew, to avoid whipping, and rotate the nut. It is hard to image how vibration of a very long slender ballscrew can be avoided if it is spun at speed. Erik -- Re: Graphics: A picture is worth 10K words -- but only those to describe the picture. Hardly any sets of 10K words can be adequately described with pictures. -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] [Off] Ballscrew Support?
2012/7/21 Erik Christiansen dva...@internode.on.net: In any event, I'd fix a long slender ballscrew, to avoid whipping, and rotate the nut. I did this on the last machine I built with this exact intention in my mind. The overall result - failure. I seriously doubt I will ever do that again. Longest screw was 2800 mm long (other 2 were 1800 mm long), all of them - 16 mm diameter, 10 mm pitch. My main conclusion - the nut housing requires pretty precise machining to match the central axis of the nut itself with the axis around which that nut rotates in bearings. I had some deviations there, so the rotation of the nut caused the screw to vibrate, so the max speed ended up to be 5x smaller than initially planned just to avoid excessive vibrations. -- Viesturs If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Broaching this screw.
On 21 July 2012 05:21, Gene Heskett ghesk...@wdtv.com wrote: It looks like I am stuck with the 3.5mm allen socket to drive this. I can't help feeling that a Torx head would be easier to make,as it is just about mill-able. It might take some experimenting and tweaking (maybe in a block of plastic) to get the shape right, though. 2. I have a live center for this mini-lathe, and if I really really snug down the tailstock clamp, it might make 200 + lbs of push. Likely not enough to push it straight in. You could perhaps augment the tailstock clamp with things clamped to the bed behind it. If it fails, you could probably finish it off with a hammer…. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] NFS hassles [Was: Spindle hooked to dc servo amp]
On Saturday 21 July 2012 06:55:06 Erik Christiansen did opine: On 20.07.12 10:51, Gene Heskett wrote: On Friday 20 July 2012 10:18:49 Erik Christiansen did opine: Would it help if we again posted some advice on how to most easily change the uids on one host to match another? While that could I suppose be useful when the distro's involved are mix-n- match, I fail to see the utility of it when I am uid:gid 1000 on all 4 machines, all installed from our own 10.04-4 LTS install cd. That's fair, since you've already done all we were suggesting. So that source of trouble has been eliminated. Much more useful would be some real examples that all I'd need to translate would be to my hostnames or even hardcoded addresses. To my knowledge, there does not seem to be a way to make these services startup like a babbling idiot and tell us what they are doing, or why they can't do it. That would be 1000's of times more useful. True. When it's failing, what do the logfiles say? ISTR that it's one of the first places you usually look, admittedly. The nfs-kernel-server package unsurprisingly logs stuff in /var/log/kern.log, I didn't know that, thank you. and seems to be reasonably talkative, even when things are going well. Not so much, but maybe a clue from service nfs-kernel-server restart: Jul 21 06:53:30 coyote kernel: [69826.321565] nfsd: last server has exited, flushing export cache Jul 21 06:53:31 coyote kernel: [69827.534764] svc: failed to register lockdv1 RPC service (errno 97). Jul 21 06:53:31 coyote kernel: [69827.535528] NFSD: Using /var/lib/nfs/v4recovery as the NFSv4 state recovery directory Jul 21 06:53:31 coyote kernel: [69827.535545] NFSD: starting 90-second grace period What is this lockdv1 RPC service? Without a hint from the logs, we're reduced to shooting in the dark, or at least through a growing cloud of BP smoke of our own making. ATM, my /etc/exports file contains 1 non-commented line: /home/gene/ coyote.coyote.den(rw,sync,no_subtree_check) How does your DNS respond to that hostname, if you try a dig coyote.coyote.den, or if not, does at least ping coyote.coyote.den pick up the right IP address? And this is nuking futz: root@coyote:/etc/init.d# dig coyote.coyote.den ; DiG 9.7.0-P1 coyote.coyote.den ;; global options: +cmd ;; Got answer: ;; -HEADER- opcode: QUERY, status: NOERROR, id: 58240 ;; flags: qr rd ra; QUERY: 1, ANSWER: 2, AUTHORITY: 2, ADDITIONAL: 0 ;; QUESTION SECTION: ;coyote.coyote.den. IN A ;; ANSWER SECTION: coyote.coyote.den. 60 IN A 8.15.7.122 coyote.coyote.den. 60 IN A 63.251.179.29 ;; AUTHORITY SECTION: coyote.coyote.den. 65535 IN NS WSC2.JOMAX.NET. coyote.coyote.den. 65535 IN NS WSC1.JOMAX.NET. ;; Query time: 113 msec ;; SERVER: 192.168.71.1#53(192.168.71.1) ;; WHEN: Sat Jul 21 07:00:29 2012 ;; MSG SIZE rcvd: 123 Totally AFU! root@coyote:/etc/init.d# ping -c3 coyote.coyote.den PING coyote.coyote.den (192.168.71.3) 56(84) bytes of data. 64 bytes from coyote.coyote.den (192.168.71.3): icmp_seq=1 ttl=64 time=0.022 ms 64 bytes from coyote.coyote.den (192.168.71.3): icmp_seq=2 ttl=64 time=0.016 ms 64 bytes from coyote.coyote.den (192.168.71.3): icmp_seq=3 ttl=64 time=0.025 ms In fact my local address is 192.168.71.3, and the router says my wan address is 204.111.65.217 and since I'm on a cable modem, that hasn't changed in 2+ years. My hosts file: 127.0.0.1 localhost 192.168.71.3coyote.coyote.den coyote 192.168.71.1router.coyote.den router 192.168.71.4shop.coyote.den shop 192.168.71.5lathe.coyote.denlathe 192.168.71.6lappy.coyote.denlappy # The following lines are desirable for IPv6 capable hosts ::1 localhost ip6-localhost ip6-loopback fe00::0 ip6-localnet ff00::0 ip6-mcastprefix ff02::1 ip6-allnodes ff02::2 ip6-allrouters ff02::3 ip6-allhosts And resolv.conf: nameserver 192.168.71.1 domain coyote.coyote.den search hosts,dns Where the router is the gateway, which fwds the dns requests to one of the shentel servers, 209.55.24.10 or 209.55.27.13 (i.e. are we certain that the problem is in NFS?) Just for comparison, I've gotten away with nothing more than lines like this in /etc/exports: /export/share 192.168.1.0/24(rw) On all machines with the FQDN of that machine edited in. Similarly, the only active line in /etc/auto.master on all machines is: /net-hosts I've never tried autofs. In this case, it seems to be another potential source of gremlins. Your aversion to editing /etc/fstab is noted, but if we append a line to nfs mount a remote filesystem, it (a) shouldn't interfere with preceding mounts, IIRC, and (b) can be tested before shutting down, by invoking the mount command just with either the filesystem or mountpoint as argument. That will cause its /etc/fstab entry to be used for mounting, and prove
Re: [Emc-users] C Compiler - MPLAB
I don't know, I am not familiar with HID in linux. I would suggest posting, or searching the MplabX forumshttp://www.microchip.com/forums/f238.aspxfor this info, if you can't get anywhere On Fri, Jul 20, 2012 at 11:07 PM, Kent A. Reed kentallanr...@gmail.comwrote: On 7/20/2012 10:10 PM, Cathrine Hribar wrote: On Mon, 16 Apr 2012 14:47:49 -0400 Erik Friesen e...@aercon.net wrote: On Mon, Apr 16, 2012 at 2:33 PM, Dave e...@dc9.tzo.com wrote: On 4/16/2012 1:15 PM, Erik Friesen wrote: http://embeddedfun.blogspot.com/2011/05/installing-mplabx-on-ubuntu-1104.html ... Hi Erik: Well I have MPLAB-X running on Ubuntu 11.10, thanks to you. My problem is that I still can't get my pickit2 to be seen by MPLABX. It is listed, along with Pickit3, in the Tool Selector list under Project Properties. The Pickit 2 shows up with two yellow dots in front but the Pickit 3 shows up with two red dots. According to the talk on Embedded Fun site, that means that Java don't have all the 32bit libraries it needs to support the pk2. Anyway, I thought I would download the libraries with sudo apt-get install ia32-libs. That's the command they gave on the site anyway. Well of course, it didn't work. The flag comes back, file deleted or missing. Can you suggest any other place I can find these 32bit libraries? Bill Bill: I haven't tried this myself, but I see a link to downloadable files for Oneric Ocelot (e.g., Ubuntu 11.10) on https://launchpad.net/ubuntu/+source/ia32-libs Regards, Kent -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] [Off] Ballscrew Support?
On 21 July 2012 05:09, Jeshua Lacock jes...@3dtopo.com wrote: 550 RPMs does not exactly strike me as spinning at high speed. Besides, wouldn't the gyroscopic force help stabilized oscillations? No, centrifugal force acts as a positive feedback on any off-centre movement. As Steve has said, there are specs for this in the ballscrew catalogues, and he seems to be suggesting that 25mm is fine for 10' according to them. As a warning, whipping can be a deadly problem with long bars out the back of a lathe headstock. They need to be restrained quite strongly. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] [Off] Ballscrew Support?
On 21.07.12 14:41, Viesturs Lācis wrote: 2012/7/21 Erik Christiansen dva...@internode.on.net: In any event, I'd fix a long slender ballscrew, to avoid whipping, and rotate the nut. I did this on the last machine I built with this exact intention in my mind. The overall result - failure. I seriously doubt I will ever do that again. Longest screw was 2800 mm long (other 2 were 1800 mm long), all of them - 16 mm diameter, 10 mm pitch. My main conclusion - the nut housing requires pretty precise machining to match the central axis of the nut itself with the axis around which that nut rotates in bearings. I had some deviations there, so the rotation of the nut caused the screw to vibrate, so the max speed ended up to be 5x smaller than initially planned just to avoid excessive vibrations. Viesturs, Of the other machines that you've built, do any have a horizontal ballscrew as long and slender as this one, spun at similar speeds? There is nothing quite like a direct physical comparison, to sort out which is better. It is a pity that you are do far away. It would be very interesting to see the effect first hand, just to learn. Are you game to mention how badly eccentric the nut housing was machined, in order to create the problem? Is there room to machine a little off the outside of the bearing mount, and slip on an eccentric outer, locktited in place with the equal eccentricities opposed, to cancel them? (Or some other rectification.) Admittedly, an 80% reduction in maximum rapid speed doesn't mean an 80% reduction in production rate, but it still seems a big loss. If the eccentricity is very small, is there possibly a resonance in the frame exacerbating the vibration? A significant mass tightly clamped in several different places might help check for that? Erik -- Theory is grey, but the golden tree of life is green. - Goethe -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] [Off] Ballscrew Support?
For long machines where the cutting forces are not hugely significant (such as a wood router) could one not used a aircraft cable setup? The cable could then be run over a motorized pulley. Something I always thought of but haven't fleshed it out further. Brian -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] [Off] Ballscrew Support?
I am not sure what yo mean by preload/stretch though. After installing the ballscrew you then put an indicator on the end of the ball screw with the mag base on the machine base. You then tighten the bearing preload until you see .007 to .009 stretch of the end of the ballscrew. I don't know which is really moving - the screw stretching for the machine base compressing. I am sure both is happening but to what extent I don't know. -- dos centavos -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] NFS hassles [Was: Spindle hooked to dc servo amp]
Gene: I'm not going to comment your recent emails because 1) I don't want to take the time to understand the information scattered through them and 2) the result would be unreadable:-) Assuming all hosts have the appropriate packages installed, some thoughts are: 1) maybe this is all working anyhow. Do you understand the autofs way is not actually to mount a remote directory until such time as a user tries to use it and that remote directories are unmounted after a period of unuse? Simply ls'ing the mount point isn't sufficient. It would show nil just as you report. 2) don't go any farther until you can reliably ssh between any two hosts on your network using their symbolic host names. If there are three hosts, you have 6 tests (ssh from a to b and c, from b to c and a, and from c to a). If ssh doesn't succeed, neither will the nfs executables. 3) start simple and add complexity. Forget about autofs for a moment. On each host, you should be able to start an nfs server exporting a single directory and then mount that directory manually on each client of that server. It took me just a few minutes to get this far with three new virtual Ubuntu hosts---one installed from the LinuxCNC LiveCD---running on my main machine. Again, there would be 6 tests if you want to be exhaustive about it. By the way, assuming your exports file permits it, you can mount on a particular host a directory exported by that same host. This enables doing some elementary tests without running from console to console. 4) now introduce autofs, one host at a time, and test that you can access directories exported from elsewhere, keeping 1) in mind. I have other things to do, but I'll try to get to this tonight with my virtual testbed. 5) the /var/log directory is loaded with log files. In addition to the/var/log/kern.log file already mentioned, you can look at /var/log/syslog. 6) nfs is a heterogeneous constellation of executables and configuration files which grew like kudzu over the years as different vendors got on the Sun Microsystems bandwagon. The Linux versions of these came from various sources as well. Most of the executables allow a debug option (-d) of some sort, but you have to be creative to figure out how to invoke it since some of the executables run as daemons. Remember that any executable intended to be a daemon can be run stand-alone for testing purposes. I do not claim to be an nfs guru. Indeed, I'm not even a big fan of nfs. Despite its irritations, however, it can serve (pun intended) us well. I've been gone for a while but I assume NIST still has a patchwork quilt of hundreds of hosts from many vendors running as clients and servers across the 600-acre Gaithersburg campus and between Gaithersburg MD and Boulder Colorado. Some folks ran tightly coupled to it, max'ing their use of its capabilities to manage every aspect including the boot process, the hosts and passwd files, yada yada yada; some, like me, used it only to access shared application programs and their license-key pools. Of course we had a number of NFS administrators who had to be put in their place from time to time when they started thinking they talked directly to God. Just my 2 cents worth. Regards, Kent -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] [Off] Ballscrew Support?
Hi Jeshua I am sure with a 10-foot span that the horizontal ballscrews will sag a little from gravity. Is this much of a concern? I think for long screws it generally a good idea not to drive the ball-screws, but the nut. While this will not reduce the sag you mentioned, it will greatly improve stability and reduce vibrations. There are special servo with hollow axis that you can directly attach to the carriage frame and the ball nut, the result is nice in-line direct ball-nut drive. But using a belt drive an a standard motor you could most probably build nice drive, too. No as rigid and dynamic and precise, but still much better than to drive a long screw. cu Flo -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] [Off] Ballscrew Support?
On 7/21/2012 8:42 AM, andy pugh wrote: On 21 July 2012 05:09, Jeshua Lacock jes...@3dtopo.com wrote: 550 RPMs does not exactly strike me as spinning at high speed. Besides, wouldn't the gyroscopic force help stabilized oscillations? No, centrifugal force acts as a positive feedback on any off-centre movement. As Steve has said, there are specs for this in the ballscrew catalogues, and he seems to be suggesting that 25mm is fine for 10' according to them. As a warning, whipping can be a deadly problem with long bars out the back of a lathe headstock. They need to be restrained quite strongly. For example, see the Types of end fixity and Critical speed entries in http://www.roton.com/application_engineering.aspx From Figure 28, I infer that the critical speed for a 25mm (1in) drive screw 10ft long and supported at both ends is about 1000rpm. From Table 40 I infer that this speed drops to about 320rpm if one end is free and rises to about 1550rpm if one end is fixed and the other supported. See Table 40 for a definition of free, supported, and fixed. I once saw a student start up a lathe with about 3 feet of slender rod extending out the back of the headstock. In less time than it took the hapless student to hit the kill switch, that free end was tracing out a cone shaped path at speed. Hate to think what would have happened to anybody unfortunate enough to be within its range. The shop supervisor went white as a sheet. Given enough students (and I was one too!) everything that can happen, will happen. Regards, Kent -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] NFS hassles [Was: Spindle hooked to dc servo amp]
On 21.07.12 07:51, Gene Heskett wrote: On Saturday 21 July 2012 06:55:06 Erik Christiansen did opine: and seems to be reasonably talkative, even when things are going well. Not so much, but maybe a clue from service nfs-kernel-server restart: Jul 21 06:53:30 coyote kernel: [69826.321565] nfsd: last server has exited, flushing export cache Since most of your mounts aren't working, let's check that this doesn't mean that all the nfs daemons have left the building. A quick $ ps -ef | grep nfsd shows bunches of them here, and I've always made sure there were at least 4 of them running on a server. You get nowhere if they're gone, and I have had it happen, both on HPUX and Solaris boxes, back when I thought I knew how this stuff works. Jul 21 06:53:31 coyote kernel: [69827.534764] svc: failed to register lockdv1 RPC service (errno 97). Jul 21 06:53:31 coyote kernel: [69827.535528] NFSD: Using /var/lib/nfs/v4recovery as the NFSv4 state recovery directory Jul 21 06:53:31 coyote kernel: [69827.535545] NFSD: starting 90-second grace period What is this lockdv1 RPC service? Yeah. It has a real guilty look, doesn't it? Just looking at it, I guess it's a version 1 lock daemon, which the log entry is telling us is a Remote Procedure Call service. (RPC is an ancient unix protocol for making procedure calls on other machines across the network. If you do a man -a rpc, you'll see that you could use it to get at nfs and portmapper services from a C program.) Incidentally, nfs needs one of them too, IIRC: $ ps -ef | egrep portmap daemon 701 1 0 16:22 ?00:00:00 portmap The registration failure doesn't have to mean much, though. I have the same here: Jul 21 17:39:34 ratatosk kernel: [ 4638.217979] svc: failed to register lockdv1 RPC service (errno 97). I'm happy with this: $ ps -ef | egrep '(lockd|statd)' # egrep, not just grep. ;-) root15 2 0 16:22 ?00:00:00 [kblockd/0] root 3073 1 0 17:39 ?00:00:00 rpc.statd -L root 3340 2 0 17:39 ?00:00:00 [lockd] NFS does need lockd and statd, to work properly, AFAIR, but it doesn't have to be lockdv1, I figure. ... How does your DNS respond to that hostname, if you try a dig coyote.coyote.den, or if not, does at least ping coyote.coyote.den pick up the right IP address? And this is nuking futz: ... Crook DNS results cropped to shorten things. Totally AFU! OK, we don't want to rely on DNS to resolve those hostnames. ;-) ... Good ping results wuz here. My hosts file: 127.0.0.1 localhost 192.168.71.3 coyote.coyote.den coyote 192.168.71.1 router.coyote.den router 192.168.71.4 shop.coyote.den shop 192.168.71.5 lathe.coyote.denlathe 192.168.71.6 lappy.coyote.denlappy # The following lines are desirable for IPv6 capable hosts ::1 localhost ip6-localhost ip6-loopback fe00::0 ip6-localnet ff00::0 ip6-mcastprefix ff02::1 ip6-allnodes ff02::2 ip6-allrouters ff02::3 ip6-allhosts And resolv.conf: nameserver 192.168.71.1 domain coyote.coyote.den searchhosts,dns Where the router is the gateway, which fwds the dns requests to one of the shentel servers, 209.55.24.10 or 209.55.27.13 That's similar to what I have here, and a ping checks /etc/hosts, but dig doesn't, although I have: $ more /etc/host.conf # The order line is only used by old versions of the C library. order hosts,bind multi on And there's a likely explanation for why dns doesn't check /ets/hosts here either, because that C library is the resolver library. ... More good ping results elided. I do not have a local to this machine dns server (adns, dnsmasq, etc) installed, and just installed dnswalk to see what it says: root@coyote:/var# dnswalk -adilrfFm coyote.coyote.den. Checking coyote.coyote.den. BAD: SOA record not found for coyote.coyote.den. !BAD: coyote.coyote.den. has NO authoritative nameservers! !BAD: All zone transfer attempts of coyote.coyote.den. failed! !0 failures, 0 warnings, 3 errors. To make sure we only have to debug nfs, what about trying in /etc/exports: /my/shared/filesystem 192.168.71.0/24(rw) (I've forgotten the names of what you're exporting) Now we don't have to resolve any hostnames, which eliminates another potential cause of the observed failure. The other mount attributes won't hurt, but they're both defaults now, IIUC. And of coarse there is no /var/named directory. I figured the hosts files should handle the local stuff if its not in the hosts file, send it to the gateway, my router, which is a Buffalo Hi-Power running genuine dd-wrt. So despite the dig results, I should be covered. Humm, hostname returns the alias! root@coyote:/var# hostname coyote Should be, but what happens with 192.168.71.0/24(rw) in /etc/exports, I wonder? Should it not be returning the FQDN? Try: $ hostname --fqdn So there are 3 head scratchers above. I just ran hostname and
Re: [Emc-users] [Off] Ballscrew Support?
2012/7/21 Erik Christiansen dva...@internode.on.net: Of the other machines that you've built, do any have a horizontal ballscrew as long and slender as this one, spun at similar speeds? That was the first time I used ballscrews, so I have no other experiece to compare with. For the next machines I am designing ballscrews only for Z axes, where the travel is relatively short. For X and Y, where travel is larger (for one of them it is up to 6 m) I will stick with rack and pinion. Are you game to mention how badly eccentric the nut housing was machined, in order to create the problem? Is there room to machine a little off the outside of the bearing mount, and slip on an eccentric outer, locktited in place with the equal eccentricities opposed, to cancel them? (Or some other rectification.) I have no idea, how to measure it precisely. Anyway, I think that manufacturing new, more precise housings is the only way to go. Admittedly, an 80% reduction in maximum rapid speed doesn't mean an 80% reduction in production rate, but it still seems a big loss. Yes of course, feedrates for milling certainly would not reach even close to max speeds. It is big loss in all the rapids. If the eccentricity is very small, is there possibly a resonance in the frame exacerbating the vibration? A significant mass tightly clamped in several different places might help check for that? It is not eccentric. The thing is that center line of the ballscrew nut does not match the line it actually rotates around - there is some angle between them. So it pushes the ballscrew in one side of the nut in one direction and on the other side - in opposite direction. -- Viesturs If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Broaching this screw.
On Saturday 21 July 2012 10:51:04 andy pugh did opine: On 21 July 2012 05:21, Gene Heskett ghesk...@wdtv.com wrote: It looks like I am stuck with the 3.5mm allen socket to drive this. I can't help feeling that a Torx head would be easier to make,as it is just about mill-able. With sub .03125 mills. Some slop in the grooves is probably un-avoidable with any mill that can reach 4mm depth in a straight plunge cut. Probably made dangerous for that small a mill as the post sled way on my mill has developed a stiction problem and descends in .002 increments of late when moving at creep speeds. No amount of gib adjusting seems to effect it, but drowning in it vactra fixes it for 5 minutes maybe. There are a lot of hours on this mill, one gear has wobbled out the keyway in its hub already, and its getting very noisy again. The bearings seem to be holding up, better than I expected since you have to beat on the end of the draw bolt to change tooling with a couple lbs of steel, but those plastic gears have got to go. I'm going deaf listening to them. Thinking on milling it, I think it would be better to drill the hole pattern, and use that same teeny drill to put a pilot hole in the center, then drill out the center with very sharp bits. I'll play with some plastic today just for SG's. It might take some experimenting and tweaking (maybe in a block of plastic) to get the shape right, though. Humm, some of that micarta I made the pcb palate from might do. HDPE has buckets of spring back as I found when I went to make some faces for the fence on my router table. This micarta throws up a ridge around a tapped hole, but at least it stays thrown up, the screw does fit the hole. So I drill tap, then mill the pocket, which mills away the ridge where it counts. That was also my original thought Andy, until I went looking for specs on the torx form that I could write gcode from. Either my google fu is bad, or its proprietary unpublished. Its not mentioned at all in my Machinery's Handbook either, issue #27. Unk if its included in newer versions. If you have a URL to a spec for the torx stuff, I'd sure appreciate it. 2. I have a live center for this mini-lathe, and if I really really snug down the tailstock clamp, it might make 200 + lbs of push. Likely not enough to push it straight in. You could perhaps augment the tailstock clamp with things clamped to the bed behind it. That would be tried if I can't hold it with the bolt/square plate washer it uses now. TBT, that square plate needs to be, and there is room for it, twice as thick. If it fails, you could probably finish it off with a hammer…. Either way, I'll have to chuck up a block of something and drill tap a 7mmx1.00 hole to hold it against the beating. If I give it a good coat of moly sulfide grease, I should be able to unscrew it from the scrap even it this drill rod expends a hair in the process. But first we play with some plastic. Cheers, Gene -- There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order. -Ed Howdershelt (Author) My web page: http://coyoteden.dyndns-free.com:85/gene is up! Computers are useless. They can only give you answers. -- Pablo Picasso -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] [Off] Ballscrew Support?
Jeshua Lacock wrote: On Jul 20, 2012, at 6:00 PM, Stephen Dubovsky wrote: Sag is only the start of the problem. The whip is going to be the real problem. Hi Stephen, I am not sure I understand what you mean by whip? Long, thin shafts tend to whip when spun at high speeds. Look up first critical speed. When the rotation speed matches the first vibrational moment's natural frequency, the vibration can build to enormous magnitude very quickly, permanently bending the shaft. Above the first critical speed, the shaft will rotate about its center of mass. Below that speed, it will rotate around the axis of its support bearings. Most ballscrew manufacturers have charts of critical speed, and you'd be amazed at how low these are for the longer ones, even at 25mm diameter. Also remember that a ballscrew is a lot less stiff than a solid shaft, and so the natural frequency is a lot lower. Jon -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Broaching this screw.
On Saturday 21 July 2012 11:37:54 andy pugh did opine: On 21 July 2012 05:21, Gene Heskett ghesk...@wdtv.com wrote: It looks like I am stuck with the 3.5mm allen socket to drive this. I can't help feeling that a Torx head would be easier to make,as it is just about mill-able. It might take some experimenting and tweaking (maybe in a block of plastic) to get the shape right, though. 2. I have a live center for this mini-lathe, and if I really really snug down the tailstock clamp, it might make 200 + lbs of push. Likely not enough to push it straight in. You could perhaps augment the tailstock clamp with things clamped to the bed behind it. If it fails, you could probably finish it off with a hammer…. And I just now did hit a page with some size specs. Looks like T15 is as big as I can shoot for. The thru hole in the extension is a good fit for a 3.5 mm allen wrench. Drilling it out to 3.8 for a T-20 would be pushing my luck. T-15 is .128 across the peaks. This is gonna be fun I suspect, depending on ones definition of fun... Cheers, Gene -- There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order. -Ed Howdershelt (Author) My web page: http://coyoteden.dyndns-free.com:85/gene is up! Is this the line for the latest whimsical YUGOSLAVIAN drama which also makes you want to CRY and reconsider the VIETNAM WAR? -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] [Off] Ballscrew Support?
On Saturday 21 July 2012 11:45:42 andy pugh did opine: On 21 July 2012 05:09, Jeshua Lacock jes...@3dtopo.com wrote: 550 RPMs does not exactly strike me as spinning at high speed. Besides, wouldn't the gyroscopic force help stabilized oscillations? No, centrifugal force acts as a positive feedback on any off-centre movement. As Steve has said, there are specs for this in the ballscrew catalogues, and he seems to be suggesting that 25mm is fine for 10' according to them. As a warning, whipping can be a deadly problem with long bars out the back of a lathe headstock. They need to be restrained quite strongly. Yeah, I've had to make s miniature gun barrel spider for my mini-lathe and dial that in pretty closely if I want to turn more than 3 or 4 hundred revs. I once had a 3 foot piece of hot roll making a 4 circle on the far end, scary. It was only off maybe 1/16 turning the chuck by hand! Cheers, Gene -- There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order. -Ed Howdershelt (Author) My web page: http://coyoteden.dyndns-free.com:85/gene is up! Oppernockity tunes but once. -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] [Off] Ballscrew Support?
Jeshua Lacock wrote: It looks like over a 10 foot span I have about 24mm (0.96 inches) of sag in the middle. 10 foot span? 25 mm diameter? Oh, my, that sounds WAY past the safe range. See http://www.nookindustries.com/ball/BallCalculators.cfm#CriticalSpeed for a critical speed calculator. With the stiffest fixing of the ends, you might be able to get 500 RPM safely. That would be 100 IPM with a 5 TPI screw. With a coarser leadscrew pitch, you don't ned as high an RPM, so maybe this will be OK. Jon -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] [Off] Ballscrew Support?
Jeshua Lacock wrote: On Jul 20, 2012, at 9:13 PM, Stuart Stevenson wrote: Andy's solution is the correct solution. A string will fold under compression. This will allow the supports to collapse together when the nut moves their direction on the screw. The string will pull the supports along with the nut and allow the supports to space themselves along the screw with the spacing equivalent to the length of the string sections. The 5 axis Cincinnati machines in my shop have .007 to .009 in preload/stretch. Hi Stuart, Thanks for the clarification! I am not sure what yo mean by preload/stretch though. Bearings at each end of the leadscrew STRETCH it across the frame of the machine, literally making the screw a few thousandths of an inch longer. This raises the natural vibration frequency moving the critical speed up, as well as prevents the screw from buckling under compressive loads. As long as the forces applied at the ballnut are less than the tension, then the screw remains under some tension. -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] [Off] Ballscrew Support?
This web page has a chart for calculating the critical speed for ball screws: http://www.roton.com/application_engineering.aspx +++ We are like tenant farmers chopping down the fence around our house for fuel when we should be using Nature's inexhaustible sources of energy -- sun, wind and tide. ... I'd put my money on the sun and solar energy. What a source of power! I hope we don't have to wait until oil and coal run out before we tackle that. -Thomas Edison, inventor (1847-1931) From: Jeshua Lacock jes...@3dtopo.com To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Sent: Friday, July 20, 2012 5:18 PM Subject: [Emc-users] [Off] Ballscrew Support? Greetings, I am upgrading my machine to handle a full 4x8 foot board of material (and 5 feet of Z!). The new table is 5x9 feet. I just received my 3-meter 25mm supported rails and 25mm C7 ballscrews. I am sure with a 10-foot span that the horizontal ballscrews will sag a little from gravity. Is this much of a concern? Does anyone know of a trick to put some kind of support in the middle of the span? I can't think of any practical way. Thanks! Best, Jeshua Lacock Founder/Engineer 3DTOPO Incorporated http://3DTOPO.com Phone: 208.462.4171 -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] NFS hassles [Was: Spindle hooked to dc servo amp]
On Saturday 21 July 2012 11:53:33 Kent A. Reed did opine: Gene: I'm not going to comment your recent emails because 1) I don't want to take the time to understand the information scattered through them and 2) the result would be unreadable:-) Assuming all hosts have the appropriate packages installed, some thoughts are: 1) maybe this is all working anyhow. Do you understand the autofs way is not actually to mount a remote directory until such time as a user tries to use it and that remote directories are unmounted after a period of unuse? Simply ls'ing the mount point isn't sufficient. It would show nil just as you report. I am aware of that. Now here it gets odd. I can cd to /net/lathe, or /net/shop (I should change its name to mill, but it was first) and then see the home dir exported. And I haven't changed anything since the last time mc would not do the cd. And just now, mc can cd to /net/shop/home or /net/lathe/home, but is getting no perms errors from any attempt to cd into the home/gene tree. Humm, a what the F moment, it says here that root:root owns /net/lathe/home/gene! But if I ssh -Y into lathe, an ls -l says /home/gene is indeed owned by gene:gene. Do I have an export rule boogered? 2) don't go any farther until you can reliably ssh between any two hosts on your network using their symbolic host names. If there are three hosts, you have 6 tests (ssh from a to b and c, from b to c and a, and from c to a). If ssh doesn't succeed, neither will the nfs executables. ssh -Y logins will let me use vim, and I can run linuxcnc over the link, but gedit 'can't open display'. As I'm using the neauvou display driver here, I think that could be related, the last time I was running the nvidia drivers it worked. 3) start simple and add complexity. Forget about autofs for a moment. On each host, you should be able to start an nfs server exporting a single directory and then mount that directory manually on each client of that server. It took me just a few minutes to get this far with three new virtual Ubuntu hosts---one installed from the LinuxCNC LiveCD---running on my main machine. Again, there would be 6 tests if you want to be exhaustive about it. By the way, assuming your exports file permits it, you can mount on a particular host a directory exported by that same host. This enables doing some elementary tests without running from console to console. 4) now introduce autofs, one host at a time, and test that you can access directories exported from elsewhere, keeping 1) in mind. I have other things to do, but I'll try to get to this tonight with my virtual testbed. 5) the /var/log directory is loaded with log files. In addition to the/var/log/kern.log file already mentioned, you can look at /var/log/syslog. 6) nfs is a heterogeneous constellation of executables and configuration files which grew like kudzu over the years as different vendors got on the Sun Microsystems bandwagon. The Linux versions of these came from various sources as well. Most of the executables allow a debug option (-d) of some sort, but you have to be creative to figure out how to invoke it since some of the executables run as daemons. Remember that any executable intended to be a daemon can be run stand-alone for testing purposes. I do not claim to be an nfs guru. Indeed, I'm not even a big fan of nfs. Despite its irritations, however, it can serve (pun intended) us well. I've been gone for a while but I assume NIST still has a patchwork quilt of hundreds of hosts from many vendors running as clients and servers across the 600-acre Gaithersburg campus and between Gaithersburg MD and Boulder Colorado. Some folks ran tightly coupled to it, max'ing their use of its capabilities to manage every aspect including the boot process, the hosts and passwd files, yada yada yada; some, like me, used it only to access shared application programs and their license-key pools. Of course we had a number of NFS administrators who had to be put in their place from time to time when they started thinking they talked directly to God. Chuckle, I've dealt with the type. Peter Principle at work. :) Just my 2 cents worth. Potentially worth more, thanks Kent. Regards, Kent -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users Cheers, Gene -- There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order.
Re: [Emc-users] Broaching this screw.
On 21 July 2012 16:44, Gene Heskett ghesk...@wdtv.com wrote: And I just now did hit a page with some size specs. Looks like T15 is as big as I can shoot for. The thru hole in the extension is a good fit for a 3.5 mm allen wrench. Broach it hex then, it can't be _that_ hard. Just don't do your real part first. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Axis Gui will not run
All, I installed a Axiom ax5214h card in my control. Since doing this the Axis GUI will not start up in my config. TKEMC runs fine. Any help would be appreciated. Dave -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Axis Gui will not run
On 21 July 2012 17:38, Dave Keeton pkeet...@woh.rr.com wrote: All, I installed a Axiom ax5214h card in my control. Since doing this the Axis GUI will not start up in my config. TKEMC runs fine. Any help would be appreciated. Probably a graphics card or opengl issue, there are possible solutions to both issues here: http://wiki.linuxcnc.org/cgi-bin/wiki.pl?TroubleShooting#Display_Issues -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] NFS hassles [Was: Spindle hooked to dc servo amp]
On Saturday 21 July 2012 12:14:51 Erik Christiansen did opine: On 21.07.12 07:51, Gene Heskett wrote: On Saturday 21 July 2012 06:55:06 Erik Christiansen did opine: and seems to be reasonably talkative, even when things are going well. Not so much, but maybe a clue from service nfs-kernel-server restart: Jul 21 06:53:30 coyote kernel: [69826.321565] nfsd: last server has exited, flushing export cache Since most of your mounts aren't working, let's check that this doesn't mean that all the nfs daemons have left the building. A quick $ ps -ef | grep nfsd shows bunches of them here, and I've always made sure there were at least 4 of them running on a server. You get nowhere if they're gone, and I have had it happen, both on HPUX and Solaris boxes, back when I thought I knew how this stuff works. Same here, at least 7 or 8 copies. Owned by root.. Jul 21 06:53:31 coyote kernel: [69827.534764] svc: failed to register lockdv1 RPC service (errno 97). Jul 21 06:53:31 coyote kernel: [69827.535528] NFSD: Using /var/lib/nfs/v4recovery as the NFSv4 state recovery directory Jul 21 06:53:31 coyote kernel: [69827.535545] NFSD: starting 90-second grace period What is this lockdv1 RPC service? Yeah. It has a real guilty look, doesn't it? Just looking at it, I guess it's a version 1 lock daemon, which the log entry is telling us is a Remote Procedure Call service. (RPC is an ancient unix protocol for making procedure calls on other machines across the network. If you do a man -a rpc, you'll see that you could use it to get at nfs and portmapper services from a C program.) Incidentally, nfs needs one of them too, IIRC: $ ps -ef | egrep portmap daemon 701 1 0 16:22 ?00:00:00 portmap Yup, got one as expected. The registration failure doesn't have to mean much, though. I have the same here: Jul 21 17:39:34 ratatosk kernel: [ 4638.217979] svc: failed to register lockdv1 RPC service (errno 97). I'm happy with this: $ ps -ef | egrep '(lockd|statd)' # egrep, not just grep. ;-) root15 2 0 16:22 ?00:00:00 [kblockd/0] root 3073 1 0 17:39 ?00:00:00 rpc.statd -L root 3340 2 0 17:39 ?00:00:00 [lockd] I get this: gene@coyote:~$ ps -ef|egrep 'lockd|statd' root30 2 0 Jul20 ?00:00:00 [kblockd/0] root31 2 0 Jul20 ?00:00:00 [kblockd/1] root32 2 0 Jul20 ?00:00:00 [kblockd/2] root33 2 0 Jul20 ?00:00:00 [kblockd/3] statd 1323 1 0 Jul20 ?00:00:00 rpc.statd -L gene 4657 2848 0 12:17 pts/600:00:00 egrep lockd|statd root 25280 2 0 07:44 ?00:00:00 [lockd] So its there. NFS does need lockd and statd, to work properly, AFAIR, but it doesn't have to be lockdv1, I figure. ... How does your DNS respond to that hostname, if you try a dig coyote.coyote.den, or if not, does at least ping coyote.coyote.den pick up the right IP address? And this is nuking futz: ... Crook DNS results cropped to shorten things. Totally AFU! OK, we don't want to rely on DNS to resolve those hostnames. ;-) ... Good ping results wuz here. My hosts file: 127.0.0.1 localhost 192.168.71.3coyote.coyote.den coyote 192.168.71.1router.coyote.den router 192.168.71.4shop.coyote.den shop 192.168.71.5lathe.coyote.denlathe 192.168.71.6lappy.coyote.denlappy # The following lines are desirable for IPv6 capable hosts ::1 localhost ip6-localhost ip6-loopback fe00::0 ip6-localnet ff00::0 ip6-mcastprefix ff02::1 ip6-allnodes ff02::2 ip6-allrouters ff02::3 ip6-allhosts And resolv.conf: nameserver 192.168.71.1 domain coyote.coyote.den search hosts,dns Where the router is the gateway, which fwds the dns requests to one of the shentel servers, 209.55.24.10 or 209.55.27.13 That's similar to what I have here, and a ping checks /etc/hosts, but dig doesn't, although I have: $ more /etc/host.conf # The order line is only used by old versions of the C library. order hosts,bind multi on And there's a likely explanation for why dns doesn't check /ets/hosts here either, because that C library is the resolver library. ... More good ping results elided. I do not have a local to this machine dns server (adns, dnsmasq, etc) installed, and just installed dnswalk to see what it says: root@coyote:/var# dnswalk -adilrfFm coyote.coyote.den. Checking coyote.coyote.den. BAD: SOA record not found for coyote.coyote.den. !BAD: coyote.coyote.den. has NO authoritative nameservers! !BAD: All zone transfer attempts of coyote.coyote.den. failed! !0 failures, 0 warnings, 3 errors. To make sure we only have to debug nfs, what about trying in /etc/exports: /my/shared/filesystem 192.168.71.0/24(rw) I just changed it to
Re: [Emc-users] Broaching this screw.
On Saturday 21 July 2012 12:55:27 andy pugh did opine: On 21 July 2012 16:44, Gene Heskett ghesk...@wdtv.com wrote: And I just now did hit a page with some size specs. Looks like T15 is as big as I can shoot for. The thru hole in the extension is a good fit for a 3.5 mm allen wrench. Broach it hex then, it can't be _that_ hard. Just don't do your real part first. A given. I'll cut off half an inch of this drill rod and try that 2nd. First will be a piece of hard plastic like micarta. Cheers, Gene -- There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order. -Ed Howdershelt (Author) My web page: http://coyoteden.dyndns-free.com:85/gene is up! Why doesn't DOS ever say EXCELLENT command or filename! % DOS Tip of the Day: Add BUGS=OFF to your CONFIG.SYS file. -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Axis Gui will not run
On 7/21/2012 12:45 PM, andy pugh wrote: On 21 July 2012 17:38, Dave Keeton pkeet...@woh.rr.com wrote: All, I installed a Axiom ax5214h card in my control. Since doing this the Axis GUI will not start up in my config. TKEMC runs fine. Any help would be appreciated. Probably a graphics card or opengl issue, there are possible solutions to both issues here: http://wiki.linuxcnc.org/cgi-bin/wiki.pl?TroubleShooting#Display_Issues Errm. Dave said Since doing this... which suggests Axis used to start but doesn't start now that he has installed the Axiom card. To my way of thinking this is not a graphics card or opengl issue unless Axis has never started. He doesn't say what the underlying system configuration is (be specific to be terrific is going to be my mantra) so I won't speculate on obscure possibilities involving the graphics subsystem. Rather, I'd have to ask what else was changed when the Axiom card was installed? Call me an ornery cuss, but I suspect changes were made to configuration files that interfere with Axis starting. Just my two cents worth. Regards, Kent PS - This situation reminds me of my life as a graduate student with a boatload of experimental data to analyze. I spent long hours in the user room of the university computer facility. Almost every night someone doing a class exercise would declare My program used to work and now it doesn't. There must be something wrong with the system. They would often zero in on me because I was camped out with a stack of IBM manuals and trays full of elaborately decorated card decks. The typical exchange would go something like this: me) I don't know anything about your program, but what changed between last time and this time? him) Nothing. me) Then why are you running the program again? him) Because I had to analyze a different case. me) So all you did was swap data decks? him) Well, sure, I made a little change to the program but that wouldn't make any difference. me) ...long silent stare... -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Axis Gui will not run
On Sat, Jul 21, 2012 at 1:45 PM, Kent A. Reed kentallanr...@gmail.comwrote: Rather, I'd have to ask what else was changed when the Axiom card was installed? Call me an ornery cuss, but I suspect changes were made to configuration files that interfere with Axis starting. Logic dictates that if the computer is displaying stuff on the screen, he's not having graphics card issues because of the axiom card. Don't we have a troubleshooting procedure in the wiki? I swear it's in there but I am also too lazy to look. The dmesg command is where I always start, it's pretty useful to be able to read the messages there. Eric -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Axis Gui will not run
On 7/21/2012 2:57 PM, Eric Keller wrote: On Sat, Jul 21, 2012 at 1:45 PM, Kent A. Reed kentallanr...@gmail.comwrote: Rather, I'd have to ask what else was changed when the Axiom card was installed? Call me an ornery cuss, but I suspect changes were made to configuration files that interfere with Axis starting. Logic dictates that if the computer is displaying stuff on the screen, he's not having graphics card issues because of the axiom card. Don't we have a troubleshooting procedure in the wiki? I swear it's in there but I am also too lazy to look. Even if we do, it's hard to design one that addresses every possible problem. I have been trying to get some reasonably important online financial work done today so I didn't look either (that's a pompous way of saying I was too lazy to look since I obviously keep my email client open). The dmesg command is where I always start, it's pretty useful to be able to read the messages there. Agreed. It's also my first response to a problem. I haven't done my homework to figure out what messages to expect from a balky Axis setup. I figured the moment I said check dmesg output someone would ask what to look for, so I didn't say it. Eric Regards, Kent -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Axis Gui will not run
On Sat, Jul 21, 2012 at 3:31 PM, Kent A. Reed kentallanr...@gmail.comwrote: Agreed. It's also my first response to a problem. I haven't done my homework to figure out what messages to expect from a balky Axis setup. I figured the moment I said check dmesg output someone would ask what to look for, so I didn't say it. I'm guessing it has something to do with the real-time system not starting, but who knows? In general, being able to diagnose using dmesg first requires that one get used to seeing the output of dmesg. Loved your anecdote, btw. Still get that kind of nonsense from people that should know better. I was reading some online forum for controls techs recently. Not really germane to this discussion, but what I learned is that the first rule of diagnosis is to leave your computer in the car or it's your fault. Eric -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Axis Gui will not run
On 21 July 2012 18:45, Kent A. Reed kentallanr...@gmail.com wrote: Errm. Dave said Since doing this... which suggests Axis used to start but doesn't start now that he has installed the Axiom card. I was rather assuming that the Axiom card was a graphics card... But if Axis doesn't start, but TKlinux does (assuming that _all_ that was changed was the UI) then OpenGL is normally the problem. -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] C Compiler - MPLAB
On Fri, 20 Jul 2012 23:07:09 -0400 Kent A. Reed kentallanr...@gmail.com wrote: On 7/20/2012 10:10 PM, Cathrine Hribar wrote: On Mon, 16 Apr 2012 14:47:49 -0400 Erik Friesen e...@aercon.net wrote: On Mon, Apr 16, 2012 at 2:33 PM, Dave e...@dc9.tzo.com wrote: On 4/16/2012 1:15 PM, Erik Friesen wrote: http://embeddedfun.blogspot.com/2011/05/installing-mplabx-on-ubuntu-1104.html ... Hi Erik: Well I have MPLAB-X running on Ubuntu 11.10, thanks to you. My problem is that I still can't get my pickit2 to be seen by MPLABX. It is listed, along with Pickit3, in the Tool Selector list under Project Properties. The Pickit 2 shows up with two yellow dots in front but the Pickit 3 shows up with two red dots. According to the talk on Embedded Fun site, that means that Java don't have all the 32bit libraries it needs to support the pk2. Anyway, I thought I would download the libraries with sudo apt-get install ia32-libs. That's the command they gave on the site anyway. Well of course, it didn't work. The flag comes back, file deleted or missing. Can you suggest any other place I can find these 32bit libraries? Bill Bill: I haven't tried this myself, but I see a link to downloadable files for Oneric Ocelot (e.g., Ubuntu 11.10) on https://launchpad.net/ubuntu/+source/ia32-libs Regards, Kent Hi Kent: Thanks for the info. Went to the site and downloaded some stuff, will see what I get. Bill -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Axis Gui will not run
On 7/21/2012 12:38 PM, Dave Keeton wrote: All, I installed a Axiom ax5214h card in my control. Since doing this the Axis GUI will not start up in my config. TKEMC runs fine. Any help would be appreciated. Dave Dave: You've got a lively side-bar exchange going among Andy, Eric, and me. My interpretation of your first message seems to be the most limited in that I infer everything including Axis was working until you added the Axiom I/O board. Andy's interpretation would mean Axis never worked. Eric's would mean LinuxCNC itself is failing to start. We need you to provide more information :-) Which version of LinuxCNC? Which version of Ubuntu? Which motherboard, cpu, graphics subsystem, etc.? Is it a straight-forward install from the LinuxCNC distribution/LiveCD or have you customized it? Under what circumstances, if any, have you ever had Axis running in this system? Does glxgears run and display spinning meshed gears? Does the output from dmesg contain any suggestive messages (no, not that kind of suggestive)? I'm sorry for the curtness of my first response. I was trying to get some online financial business done before my credit union shut down its site for maintenance this weekend (nope; they pulled the plug before I could get finished). I realize now that my appended anecdote looks pretty snarky. I should have sent it separately since I have been reminded of the experience by any number of discussion threads. Don't take it to heart. I actually assumed you were doing pretty well since you could make TkEMC to run in place of Axis. LinuxCNC can be a bear to configure with so many possible variations in hardware and interfaces. Everyone of us has had days where we're stumped. Regards, Kent -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Axis Gui will not run
On Sat, 2012-07-21 at 17:45 +0100, andy pugh wrote: On 21 July 2012 17:38, Dave Keeton pkeet...@woh.rr.com wrote: All, I installed a Axiom ax5214h card in my control. Since doing this the Axis GUI will not start up in my config. TKEMC runs fine. Any help would be appreciated. Probably a graphics card or opengl issue, there are possible solutions to both issues here: http://wiki.linuxcnc.org/cgi-bin/wiki.pl?TroubleShooting#Display_Issues Thanks! Turns out it was an active driver from my old video card that had been removed a while back. All is good now! Dave -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] C Compiler - MPLAB
On 7/21/2012 4:46 PM, Cathrine Hribar wrote: On Fri, 20 Jul 2012 23:07:09 -0400 Kent A. Reed kentallanr...@gmail.com wrote: On 7/20/2012 10:10 PM, Cathrine Hribar wrote: On Mon, 16 Apr 2012 14:47:49 -0400 Erik Friesen e...@aercon.net wrote: On Mon, Apr 16, 2012 at 2:33 PM, Dave e...@dc9.tzo.com wrote: On 4/16/2012 1:15 PM, Erik Friesen wrote: http://embeddedfun.blogspot.com/2011/05/installing-mplabx-on-ubuntu-1104.html ... Hi Erik: Well I have MPLAB-X running on Ubuntu 11.10, thanks to you. My problem is that I still can't get my pickit2 to be seen by MPLABX. It is listed, along with Pickit3, in the Tool Selector list under Project Properties. The Pickit 2 shows up with two yellow dots in front but the Pickit 3 shows up with two red dots. According to the talk on Embedded Fun site, that means that Java don't have all the 32bit libraries it needs to support the pk2. Anyway, I thought I would download the libraries with sudo apt-get install ia32-libs. That's the command they gave on the site anyway. Well of course, it didn't work. The flag comes back, file deleted or missing. Can you suggest any other place I can find these 32bit libraries? Bill Bill: I haven't tried this myself, but I see a link to downloadable files for Oneric Ocelot (e.g., Ubuntu 11.10) on https://launchpad.net/ubuntu/+source/ia32-libs Regards, Kent Hi Kent: Thanks for the info. Went to the site and downloaded some stuff, will see what I get. Bill Bill, I didn't ask if you are running a 32-bit or 64-bit version of Ubuntu. (I don't actually want to know but) I noticed that somewhere along the timeline of the 11.x releases of Ubuntu there was a repackaging of the ia32-libs; for example there is now metapackage ia32-libs-multiarch. I don't pretend to understand what was done but apparently it is supposed to help one deal with the differences between the two platforms. Only you can judge. I agree with Erik Friesen that you're much more likely to get good answers by posting these questions to the appropriate microchip forum. They may not know LinuxCNC but they know tons more that we do about MPLABX and about using it on Ubuntu. Hope your board lights up soon. Regards, Kent -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Axis Gui will not run
On Sat, 2012-07-21 at 17:02 -0400, Kent A. Reed wrote: On 7/21/2012 12:38 PM, Dave Keeton wrote: All, I installed a Axiom ax5214h card in my control. Since doing this the Axis GUI will not start up in my config. TKEMC runs fine. Any help would be appreciated. Dave Dave: You've got a lively side-bar exchange going among Andy, Eric, and me. My interpretation of your first message seems to be the most limited in that I infer everything including Axis was working until you added the Axiom I/O board. Andy's interpretation would mean Axis never worked. Eric's would mean LinuxCNC itself is failing to start. We need you to provide more information :-) Which version of LinuxCNC? Which version of Ubuntu? Which motherboard, cpu, graphics subsystem, etc.? Is it a straight-forward install from the LinuxCNC distribution/LiveCD or have you customized it? Under what circumstances, if any, have you ever had Axis running in this system? Does glxgears run and display spinning meshed gears? Does the output from dmesg contain any suggestive messages (no, not that kind of suggestive)? I'm sorry for the curtness of my first response. I was trying to get some online financial business done before my credit union shut down its site for maintenance this weekend (nope; they pulled the plug before I could get finished). I realize now that my appended anecdote looks pretty snarky. I should have sent it separately since I have been reminded of the experience by any number of discussion threads. Don't take it to heart. I actually assumed you were doing pretty well since you could make TkEMC to run in place of Axis. LinuxCNC can be a bear to configure with so many possible variations in hardware and interfaces. Everyone of us has had days where we're stumped. Regards, Kent -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users Sorry if I caused such an uproar just asking a simple question! GEEEZ Guys! Just kidding.Yes I should have given more info as I knew better being a service tech for CNC machines myself. Sorry, it wont happen again! Turns out that long before I installed the Axiom card I removed a Visiontek ATI X1300 graphics card and forgot to remove all of the drivers and ATI Catalyst software. I installed the Axiom DIO card yesterday. The Axis GUI worked up until that point then everything went haywire and the only GUI that would work was tkemc. I removed the ATI drivers and Axis started working again as well as the Axiom card. The computer is a rack mount single board with an ISA/PCI backplane. The CPU is a pentium 4 2.4 Ghz with 2 Gig of ram. Currently using the embedded graphics port. Sorry for the trouble and please don't spankenz me with that hair brush again! ;-) Dave -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Axis Gui will not run
On 7/21/2012 5:24 PM, Dave Keeton wrote: ... Sorry if I caused such an uproar just asking a simple question! GEEEZ Guys! Just kidding.Yes I should have given more info as I knew better being a service tech for CNC machines myself. Sorry, it wont happen again! Turns out that long before I installed the Axiom card I removed a Visiontek ATI X1300 graphics card and forgot to remove all of the drivers and ATI Catalyst software. I installed the Axiom DIO card yesterday. The Axis GUI worked up until that point then everything went haywire and the only GUI that would work was tkemc. I removed the ATI drivers and Axis started working again as well as the Axiom card. The computer is a rack mount single board with an ISA/PCI backplane. The CPU is a pentium 4 2.4 Ghz with 2 Gig of ram. Currently using the embedded graphics port. Sorry for the trouble and please don't spankenz me with that hair brush again! ;-) Dave Boy, if only I had a nickel for every time I heard the old I forgot to remove the old drivers :-) It should be obvious that in the absence of facts we are perfectly happy to make up scenarios out of whole cloth. Glad it's working now. Like the man said, all's well that ends well. Regards, Kent -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] [Off] Ballscrew Support?
On Jul 21, 2012, at 9:50 AM, Jon Elson wrote: Jeshua Lacock wrote: It looks like over a 10 foot span I have about 24mm (0.96 inches) of sag in the middle. 10 foot span? 25 mm diameter? Oh, my, that sounds WAY past the safe range. See http://www.nookindustries.com/ball/BallCalculators.cfm#CriticalSpeed for a critical speed calculator. With the stiffest fixing of the ends, you might be able to get 500 RPM safely. That would be 100 IPM with a 5 TPI screw. With a coarser leadscrew pitch, you don't ned as high an RPM, so maybe this will be OK. Thanks everyone for all the very useful information!!! Most of the information I had no idea about! And thanks for the calculator Jon. Using End Fixity B (one end double bearing the other single bearing) for 117 inch span I get a safe RPM of 278. At 5cm/rev that is 547 IPM. I think I could happily live with that. More important than top end speed to me is how fast the table can accelerate. And for a 250+ pound table 547 IPM rapids seems pretty decent to me. This axis is also going to be the slowest, so for raster scanning I can move more rapidly on the Y axis. If I had double bearing on both sides (End Fixity C), I would get to 805 IPM and with End Fixity D I would get to 1220 IPM. Unfortunately, I think that would require taking the ballscrews to a machine shop. I guess if I ever want faster top end speed that is an option. Thanks again, Jeshua Lacock Founder/Engineer 3DTOPO Incorporated http://3DTOPO.com Phone: 208.462.4171 -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] C Compiler - MPLAB
On Sat, 21 Jul 2012 17:15:32 -0400 Kent A. Reed kentallanr...@gmail.com wrote: On 7/21/2012 4:46 PM, Cathrine Hribar wrote: On Fri, 20 Jul 2012 23:07:09 -0400 Kent A. Reed kentallanr...@gmail.com wrote: On 7/20/2012 10:10 PM, Cathrine Hribar wrote: On Mon, 16 Apr 2012 14:47:49 -0400 Erik Friesen e...@aercon.net wrote: On Mon, Apr 16, 2012 at 2:33 PM, Dave e...@dc9.tzo.com wrote: On 4/16/2012 1:15 PM, Erik Friesen wrote: http://embeddedfun.blogspot.com/2011/05/installing-mplabx-on-ubuntu-1104.html ... Hi Erik: Well I have MPLAB-X running on Ubuntu 11.10, thanks to you. My problem is that I still can't get my pickit2 to be seen by MPLABX. It is listed, along with Pickit3, in the Tool Selector list under Project Properties. The Pickit 2 shows up with two yellow dots in front but the Pickit 3 shows up with two red dots. According to the talk on Embedded Fun site, that means that Java don't have all the 32bit libraries it needs to support the pk2. Anyway, I thought I would download the libraries with sudo apt-get install ia32-libs. That's the command they gave on the site anyway. Well of course, it didn't work. The flag comes back, file deleted or missing. Can you suggest any other place I can find these 32bit libraries? Bill Bill: I haven't tried this myself, but I see a link to downloadable files for Oneric Ocelot (e.g., Ubuntu 11.10) on https://launchpad.net/ubuntu/+source/ia32-libs Regards, Kent Hi Kent: Thanks for the info. Went to the site and downloaded some stuff, will see what I get. Bill Bill, I didn't ask if you are running a 32-bit or 64-bit version of Ubuntu. (I don't actually want to know but) I noticed that somewhere along the timeline of the 11.x releases of Ubuntu there was a repackaging of the ia32-libs; for example there is now metapackage ia32-libs-multiarch. I don't pretend to understand what was done but apparently it is supposed to help one deal with the differences between the two platforms. Only you can judge. I agree with Erik Friesen that you're much more likely to get good answers by posting these questions to the appropriate microchip forum. They may not know LinuxCNC but they know tons more that we do about MPLABX and about using it on Ubuntu. Hope your board lights up soon. Regards, Kent Thanks Kent for the update. will look at that. I bought the Pickit2 before I started with MPLABX. They said that it would run on mt Windows 2000. Not! I will get a Pickit3 sometime in future. Don't have much confidence in this as of yet!!\\Bill -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] [Off] Ballscrew Support?
On Sat, 21 Jul 2012 14:41:01 +0300, you wrote: 2012/7/21 Erik Christiansen dva...@internode.on.net: In any event, I'd fix a long slender ballscrew, to avoid whipping, and rotate the nut. I did this on the last machine I built with this exact intention in my mind. The overall result - failure. I seriously doubt I will ever do that again. Longest screw was 2800 mm long (other 2 were 1800 mm long), all of them - 16 mm diameter, 10 mm pitch. Yea - too small a diameter screw for decent performance at that length. I have a 2.5m ballscrew here that came off a laser cutter. Now bear in mind there are no cutting forces involved, it was off the Y axis and only moving the head across the gantry. It's 32mm diameter and has large bearing blocks and preload adjustment on both ends. Also has two ball nuts for backlash adjustment :) I also have another 32mm one that was an unused spare off a Denford CNC lathe - it's only got about 300 mm of travel but was designed to be fixed at one end only - hence the diameter. They were destined for a slant bed lathe I designed but I never got around to building it G. Steve Blackmore -- -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Axis Gui will not run
Eric Keller wrote: I'm guessing it has something to do with the real-time system not starting, but who knows? In general, being able to diagnose using dmesg first requires that one get used to seeing the output of dmesg. OK, well, to us LinuxCNC insiders, Axis not starting is different from LinuxCNC not starting. There certainly will be different error messages, although the outward symptoms might look pretty much the same. So, yes, we need the OP to be as specific as he can be. Jon -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Axis Gui will not run
Kent A. Reed wrote: Rather, I'd have to ask what else was changed when the Axiom card was installed? Call me an ornery cuss, but I suspect changes were made to configuration files that interfere with Axis starting. Well, a very easy way to test it is to try to run glxgears. That may even produce a useful message. If glxgears runs and displays some animated spinning gears, then opengl is working correctly. If it doesn't, that is a very strong indication that opengl or the mesa emulation is not working. Can you pull this graphics card back out and see how it works? Jon -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] [Off] Ballscrew Support?
On 21 July 2012 23:04, Jeshua Lacock jes...@3dtopo.com wrote: At 5cm/rev that is 547 IPM. I think I could happily live with that. That's a very high-lead ballscrew. I haven't seen any balls crews with a pitch twice the diameter. Are you sure you are not a factor of 10 out? -- atp If you can't fix it, you don't own it. http://www.ifixit.com/Manifesto -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] [Off] Ballscrew Support?
On Jul 21, 2012, at 5:49 PM, andy pugh wrote: On 21 July 2012 23:04, Jeshua Lacock jes...@3dtopo.com wrote: At 5cm/rev that is 547 IPM. I think I could happily live with that. That's a very high-lead ballscrew. I haven't seen any balls crews with a pitch twice the diameter. Are you sure you are not a factor of 10 out? That is funny - at the same time you must have been thinking of this, I was double checking it! The specs said the lead was 5. I had assumed 5cm - in fact it is only 5mm! Doh! So you are correct - off by a factor of 10! To make matters worse, I thought they were 25mm, but they are 20mm. So that drops the safe speed down to a miserable 43.89 IPM. :'( Damn. Anyone want to buy two brand new ballscrews? :D Maybe I will use them on a laser cutter instead. High speed is not as important to me on a laser cutter as it is on a 3D milling machine. Path lengths are *much* longer doing 3D stuff versus 2D cutting…. Maybe I will use timing belts for this machine. Just seems like they will have a lot of flex over a 10 foot span. Chain drive? Cheers, Jeshua Lacock Founder/Engineer 3DTOPO Incorporated http://3DTOPO.com Phone: 208.462.4171 -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] [Off] Ballscrew Support?
On Sat, Jul 21, 2012, at 06:04 PM, Jeshua Lacock wrote: Damn. Anyone want to buy two brand new ballscrews? :D Maybe I will use them on a laser cutter instead. High speed is not as important to me on a laser cutter as it is on a 3D milling machine. Path lengths are *much* longer doing 3D stuff versus 2D cutting…. Maybe I will use timing belts for this machine. Just seems like they will have a lot of flex over a 10 foot span. Chain drive? I saw an idea once that attempted to solve the problem of timing belt stretch by attaching one belt along its full length to the machine frame, then meshing another belt to that one to drive the axis. A picture is worth a thousand words, see this posting: http://www.mycncuk.com/forums/showthread.php/1599-Planning-and-build-of-my-8020-aluminium-CNC-Router?p=10463viewfull=1#post10463 It essentially becomes a rack-and-pinion of sorts. I didn't read that full thread to see if he actually built the machine, and how it worked out. I think I also saw the same idea discussed on CNCzone. Of course, you could also just go the rack-and-pinion route. The rack teeth should point down to shed dirt and chips. -- John Kasunich jmkasun...@fastmail.fm -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] [Off] Ballscrew Support?
Have you considered rack and pinion for your machine. CNCrouterparts has a very affordable solution: http://www.cncrouterparts.com/rack-and-pinion-drive-nema-34-p-80.htmlI've not used them but they have gotten good reviews from users at CNCzone and I've been happy with other components of theirs I've used on my machine. +++ We are like tenant farmers chopping down the fence around our house for fuel when we should be using Nature's inexhaustible sources of energy -- sun, wind and tide. ... I'd put my money on the sun and solar energy. What a source of power! I hope we don't have to wait until oil and coal run out before we tackle that. -Thomas Edison, inventor (1847-1931) From: Jeshua Lacock jes...@3dtopo.com To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Sent: Saturday, July 21, 2012 7:04 PM Subject: Re: [Emc-users] [Off] Ballscrew Support? On Jul 21, 2012, at 5:49 PM, andy pugh wrote: On 21 July 2012 23:04, Jeshua Lacock jes...@3dtopo.com wrote: At 5cm/rev that is 547 IPM. I think I could happily live with that. That's a very high-lead ballscrew. I haven't seen any balls crews with a pitch twice the diameter. Are you sure you are not a factor of 10 out? That is funny - at the same time you must have been thinking of this, I was double checking it! The specs said the lead was 5. I had assumed 5cm - in fact it is only 5mm! Doh! So you are correct - off by a factor of 10! To make matters worse, I thought they were 25mm, but they are 20mm. So that drops the safe speed down to a miserable 43.89 IPM. :'( Damn. Anyone want to buy two brand new ballscrews? :D Maybe I will use them on a laser cutter instead. High speed is not as important to me on a laser cutter as it is on a 3D milling machine. Path lengths are *much* longer doing 3D stuff versus 2D cutting…. Maybe I will use timing belts for this machine. Just seems like they will have a lot of flex over a 10 foot span. Chain drive? Cheers, Jeshua Lacock Founder/Engineer 3DTOPO Incorporated http://3DTOPO.com Phone: 208.462.4171 -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] [Off] Ballscrew Support?
On Jul 21, 2012, at 5:49 PM, andy pugh wrote: On 21 July 2012 23:04, Jeshua Lacock jes...@3dtopo.com wrote: At 5cm/rev that is 547 IPM. I think I could happily live with that. That's a very high-lead ballscrew. I haven't seen any balls crews with a pitch twice the diameter. Are you sure you are not a factor of 10 out? Hm... It looks like if have a sliding support like you suggested trailing on either side of the ball screw by 38 inches that would allow me to get up to 1113 RPM which would give me a pretty respectable 388 IPM…. Best, Jeshua Lacock Founder/Engineer 3DTOPO Incorporated http://3DTOPO.com Phone: 208.462.4171 -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] [Off] Ballscrew Support?
On Jul 21, 2012, at 6:24 PM, John Kasunich wrote: n Sat, Jul 21, 2012, at 06:04 PM, Jeshua Lacock wrote: Damn. Anyone want to buy two brand new ballscrews? :D Maybe I will use them on a laser cutter instead. High speed is not as important to me on a laser cutter as it is on a 3D milling machine. Path lengths are *much* longer doing 3D stuff versus 2D cutting…. Maybe I will use timing belts for this machine. Just seems like they will have a lot of flex over a 10 foot span. Chain drive? I saw an idea once that attempted to solve the problem of timing belt stretch by attaching one belt along its full length to the machine frame, then meshing another belt to that one to drive the axis. A picture is worth a thousand words, see this posting: http://www.mycncuk.com/forums/showthread.php/1599-Planning-and-build-of-my-8020-aluminium-CNC-Router?p=10463viewfull=1#post10463 It essentially becomes a rack-and-pinion of sorts. I didn't read that full thread to see if he actually built the machine, and how it worked out. I think I also saw the same idea discussed on CNCzone. Interesting. Yeah, looks like he never built it - or at least reported back. Of course, you could also just go the rack-and-pinion route. The rack teeth should point down to shed dirt and chips. I don't recall the specifics, but I read somewhere that rack-and-pinon was not a good solution. Maybe it had something to do with resonance? Cheers, Jeshua Lacock Founder/Engineer 3DTOPO Incorporated http://3DTOPO.com Phone: 208.462.4171 -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] [Off] Ballscrew Support?
On Sat, 21 Jul 2012, John Kasunich wrote: Date: Sat, 21 Jul 2012 20:24:22 -0400 From: John Kasunich jmkasun...@fastmail.fm Reply-To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net To: Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net Subject: Re: [Emc-users] [Off] Ballscrew Support? On Sat, Jul 21, 2012, at 06:04 PM, Jeshua Lacock wrote: Damn. Anyone want to buy two brand new ballscrews? :D Maybe I will use them on a laser cutter instead. High speed is not as important to me on a laser cutter as it is on a 3D milling machine. Path lengths are *much* longer doing 3D stuff versus 2D cutting??. Maybe I will use timing belts for this machine. Just seems like they will have a lot of flex over a 10 foot span. Chain drive? I saw an idea once that attempted to solve the problem of timing belt stretch by attaching one belt along its full length to the machine frame, then meshing another belt to that one to drive the axis. A picture is worth a thousand words, see this posting: http://www.mycncuk.com/forums/showthread.php/1599-Planning-and-build-of-my-8020-aluminium-CNC-Router?p=10463viewfull=1#post10463 It essentially becomes a rack-and-pinion of sorts. I didn't read that full thread to see if he actually built the machine, and how it worked out. I think I also saw the same idea discussed on CNCzone. Of course, you could also just go the rack-and-pinion route. The rack teeth should point down to shed dirt and chips. -- John Kasunich jmkasun...@fastmail.fm Theres a commercial version of this or something very close (with I think special belts) but my google foo is failing me now Peter Wallace Mesa Electronics -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] [Off] Ballscrew Support?
Theres a commercial version of this or something very close (with I think special belts) but my google foo is failing me now Peter Wallace Mesa Electronics Ahh here it is: http://bell-everman.com/products/linear-positioning/servobelt-linear-sbl Peter Wallace Mesa Electronics -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] [Off] Ballscrew Support?
I also remembered seeing a more commercial version of that somewhere, but like you I couldn't find it. When I found that forum post I stopped looking :) On Sat, Jul 21, 2012, at 05:47 PM, Peter C. Wallace wrote: Theres a commercial version of this or something very close (with I think special belts) but my google foo is failing me now Peter Wallace Mesa Electronics Ahh here it is: http://bell-everman.com/products/linear-positioning/servobelt-linear-sbl Peter Wallace Mesa Electronics -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- John Kasunich jmkasun...@fastmail.fm -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Pittman BLDC + 7I39 experience?
I recently picked up a couple Pittman ELCOM ST brushless servo motors. I haven't been able to find data for the exact part number, but everything appear to match up with the N2311 with 18.3V windings as described in this data sheet: www.control-drive.com/Products/Servo_Motors/PITTMAN/est_Brushless_2300.pdf The ones I have include both hall sensors (color code matches that datasheet) and a 1000 CPR encoder. I would like to drive them with a 5i20 and 7i39, and LinuxCNC's bldc HAL component. I haven't really started digging into the docs yet, I was just wondering if anyone has any experience with these or similar motors. Thanks, -- John Kasunich jmkasun...@fastmail.fm -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] [Off] Ballscrew Support?
On Jul 21, 2012, at 6:47 PM, Peter C. Wallace wrote: Ahh here it is: http://bell-everman.com/products/linear-positioning/servobelt-linear-sbl Thats pretty cool. I wonder what keeps the belts together? Gravity? Cheers, Jeshua Lacock Founder/Engineer 3DTOPO Incorporated http://3DTOPO.com Phone: 208.462.4171 -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] [Off] Ballscrew Support?
The idler pulleys push them together on either side of the pinion, which is where the force is transferred from the upper belt to the lower one. The lower one is glued to the machine frame along its entire length, so the force is then transferred to the frame. Neither belt has any significant tension outside the area of the idlers, so there isn't much needed to keep them together - gravity does it. I don't think it would work with regular trapezoidal timing belts (like the MXK, XL, L, etc series), because the teeth are smaller than the spaces between the teeth. So they belts wouldn't mesh tightly. A GT or HTD belt might do better, I haven't looked up those belt profiles to see if they would provide a positive mesh. Thinking about it a bit, maybe even trapezoid belts would work. The teeth on the upper belt don't need to be centered in the spaces on the lower belt. On the left side of the drive unit, the right flank of the upper belt tooth could be in contact with the left flank of the lower belt tooth, so it could transfer tension to the lower belt. On the right side of the drive unit things are reversed, with the left flank of the upper tooth in contact with the right flank of the lower tooth. Again, it can transfer tension to the lower belt. The main problem is that force is transferred between belts by only one or two teeth - the ones directly under the idler pulleys. Making the idler pulleys as large as possible would improve that a bit. It all comes down to how much force is needed, and how expensive is strong, wide belting compared to alternative ways of doing the same thing (like rack and pinion). By comparison, if you used only the upper belt, and stretched it tight enough that both sides were under tension loading even with maximum force on the carriage, it would be stronger (load limited by the teeth in mesh over 180 degrees of pinion) but springier (tension members of the belt are long and thin, and even if steel they are elastic). But you have to buy half as much belting, so the belting could be bigger. It would be an interesting design exercise. Econobelt and SDP-SI are both belt suppliers with a good bit of technical info on their sites. The ultimate choice depends on your requirements. If you have lots of cutting force, rack and pinion would probably be better. If you need speed and low noise and not so much stiffness, a single timing belt with two idlers and a pinion would be better. The interlocking belt thing is weaker than both, I think, but much stiffer than the single belt. On Sat, Jul 21, 2012, at 07:38 PM, Jeshua Lacock wrote: On Jul 21, 2012, at 6:47 PM, Peter C. Wallace wrote: Ahh here it is: http://bell-everman.com/products/linear-positioning/servobelt-linear-sbl Thats pretty cool. I wonder what keeps the belts together? Gravity? Cheers, Jeshua Lacock Founder/Engineer 3DTOPO Incorporated http://3DTOPO.com Phone: 208.462.4171 -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- John Kasunich jmkasun...@fastmail.fm -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Broaching this screw.
On Saturday 21 July 2012 22:14:28 Gene Heskett did opine: On Saturday 21 July 2012 12:55:27 andy pugh did opine: On 21 July 2012 16:44, Gene Heskett ghesk...@wdtv.com wrote: And I just now did hit a page with some size specs. Looks like T15 is as big as I can shoot for. The thru hole in the extension is a good fit for a 3.5 mm allen wrench. Broach it hex then, it can't be _that_ hard. Just don't do your real part first. A given. I'll cut off half an inch of this drill rod and try that 2nd. First will be a piece of hard plastic like micarta. Cheers, Gene I got it done, not once but twice, second time in the real screw. Then I did a boo-boo after making a 7mm tapped pocket to hold the screw, I mounted the drill bit, dropping its diameter about 6 thou, and thinking in mm that I needed to drill maybe 7mm into the end of it, zeroed the z without checking to see if it really was, fed the bit in, glance at the dro occasionally but always seeing it as -2.something, so I kept on boring. When I realized the display was in inches and that there must have been a previous touch off in effect. The net effect is that I bored to far and broke the screw at the size change. That made it beer thirty I was one behind. My biggest problem was that 3.5mm wrench, is damned near made out of unobtainium, I check Advance Auto, TSC and finally found 2 pocket kits at Lowes with a 3.5mm. That turned out to be damned hard stuff, and my lathe drove it in 4 to 5mm very easily with about a 1/8 tail stock offset. Veddy tight though, took a pair of BIG vice grips and a hammer to remove the key piece both times. Without resorting to driving it back in with a hammer, it only goes back in about 1mm. So, I guess tomorrow I re-rig and sharpen my thread cutter, and make another screw. Then its probably going to slow for a day or 3 because I have no clue how much nose I'll come home with Monday. Squamus Cell they called them this time. Several small ones. Cheers, Gene -- There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order. -Ed Howdershelt (Author) My web page: http://coyoteden.dyndns-free.com:85/gene is up! Minimum charge for booths. -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Broaching this screw.
What about torch heating the end and hot forging with the (cold) driver of your choice? Perhaps start with a full depth pilot hole so the forging tool doesn't have to displace as much material. You could then quench and temper to preference. Jason On Jul 21, 2012 9:32 PM, Gene Heskett ghesk...@wdtv.com wrote: On Saturday 21 July 2012 22:14:28 Gene Heskett did opine: On Saturday 21 July 2012 12:55:27 andy pugh did opine: On 21 July 2012 16:44, Gene Heskett ghesk...@wdtv.com wrote: And I just now did hit a page with some size specs. Looks like T15 is as big as I can shoot for. The thru hole in the extension is a good fit for a 3.5 mm allen wrench. Broach it hex then, it can't be _that_ hard. Just don't do your real part first. A given. I'll cut off half an inch of this drill rod and try that 2nd. First will be a piece of hard plastic like micarta. Cheers, Gene I got it done, not once but twice, second time in the real screw. Then I did a boo-boo after making a 7mm tapped pocket to hold the screw, I mounted the drill bit, dropping its diameter about 6 thou, and thinking in mm that I needed to drill maybe 7mm into the end of it, zeroed the z without checking to see if it really was, fed the bit in, glance at the dro occasionally but always seeing it as -2.something, so I kept on boring. When I realized the display was in inches and that there must have been a previous touch off in effect. The net effect is that I bored to far and broke the screw at the size change. That made it beer thirty I was one behind. My biggest problem was that 3.5mm wrench, is damned near made out of unobtainium, I check Advance Auto, TSC and finally found 2 pocket kits at Lowes with a 3.5mm. That turned out to be damned hard stuff, and my lathe drove it in 4 to 5mm very easily with about a 1/8 tail stock offset. Veddy tight though, took a pair of BIG vice grips and a hammer to remove the key piece both times. Without resorting to driving it back in with a hammer, it only goes back in about 1mm. So, I guess tomorrow I re-rig and sharpen my thread cutter, and make another screw. Then its probably going to slow for a day or 3 because I have no clue how much nose I'll come home with Monday. Squamus Cell they called them this time. Several small ones. Cheers, Gene -- There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order. -Ed Howdershelt (Author) My web page: http://coyoteden.dyndns-free.com:85/gene is up! Minimum charge for booths. -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Broaching this screw.
On Saturday 21 July 2012 23:09:13 Jason Burton did opine: What about torch heating the end and hot forging with the (cold) driver of your choice? Because the broach would be hot very fast. This actually works fairly well cold except its pretty snug I have to get serious to get it bounced back out. I haven't checked the fit, but its possible the 3.5mm tool would make a socket that a 1/8 sae wrench would fit, I may try that tomorrow see how schloppy it is. Perhaps start with a full depth pilot hole so the forging tool doesn't have to displace as much material. That 6 or 7mm I thought I ws drilling into it was plenty of clearance for the broach to displace the materiel in front of it. The problem is that my mind was in mm's but the display was in inches and I had drilled about 3x deeper than I should have by the time I had the 'Duh' or senior moment. The damage is done now, so all I can do is make another one. Call it my Martian mistake. Mixing matching inches mm's is bad karma for me. You could then quench and temper to preference. I don't have a real good way to heat. Mapp gas I have, but with the dime store valves in those things its hopeless, can't be adjusted for a good flame. I am a pretty good gas welder too but when I retired, somebody got away with the gas bottles I kept at the tv station to run my smith wrench with. I have a mig kit too, but that doesn't lend itself to heating at all well either. [...] Cheers, Gene -- There are four boxes to be used in defense of liberty: soap, ballot, jury, and ammo. Please use in that order. -Ed Howdershelt (Author) My web page: http://coyoteden.dyndns-free.com:85/gene is up! Tart words make no friends; a spoonful of honey will catch more flies than a gallon of vinegar. -- B. Franklin -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] [Off] Ballscrew Support?
andy pugh wrote: On 21 July 2012 23:04, Jeshua Lacock jes...@3dtopo.com wrote: At 5cm/rev that is 547 IPM. I think I could happily live with that. That's a very high-lead ballscrew. I haven't seen any balls crews with a pitch twice the diameter. Are you sure you are not a factor of 10 out? You can get high-lead ballscrews, but they are usually special-order items. I have some fairly small ballscrews with something like 20mm lead on my pick place machine (Yamaha/Philips). They are over a meter long, so they were fighting this exact problem. This machine runs over a m/sec so they definitely run into the danger region without a high-lead screw. Jon -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Pittman BLDC + 7I39 experience?
John Kasunich wrote: I recently picked up a couple Pittman ELCOM ST brushless servo motors. I haven't been able to find data for the exact part number, but everything appear to match up with the N2311 with 18.3V windings as described in this data sheet: www.control-drive.com/Products/Servo_Motors/PITTMAN/est_Brushless_2300.pdf The ones I have include both hall sensors (color code matches that datasheet) and a 1000 CPR encoder. I would like to drive them with a 5i20 and 7i39, and LinuxCNC's bldc HAL component. I haven't really started digging into the docs yet, I was just wondering if anyone has any experience with these or similar motors. Thanks, I have had a Pittman 4443 motor on my minimill for several years. It is the long, skinny motor, not like the picture in your link. I don't know if that makes any difference. It works quite well with six-step drive. Jon -- Live Security Virtual Conference Exclusive live event will cover all the ways today's security and threat landscape has changed and how IT managers can respond. Discussions will include endpoint security, mobile security and the latest in malware threats. http://www.accelacomm.com/jaw/sfrnl04242012/114/50122263/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
