Re: [Emc-users] Threading Hickups
On Thursday 18 October 2007, Kirk Wallace wrote: On Thu, 2007-10-18 at 00:17 -0400, Jim Coleman wrote: On 10/18/07, Jon Elson [EMAIL PROTECTED] wrote: Kirk Wallace wrote: Thanks again Jon and Chris. What should have been obvious turns ... snip interference sources like motor-VFD cables and any other that might have 120 or 240 VAC on them. Jon in my hitachi seiki manual, it says that twisted pair wire should be used for the encoders. not sure if this would help eliminate noise in your situation or not. I used the existing cable which has four shielded twisted pairs. I have one pair for each A, B, I and power. How about the ends of the shielding wrap at the machine? They should be well grounded at the computer interface end and get as close as possible to the encoder, but should probably be isolated from the machine frame to avoid picking up noise or enabling a ground loop, which with variable phase angle thyristor speed controls on the spindle motor, can contain a lot of hf noises. And if the encoder has a ground, can it be isolated from the machine and tied to one of the shields? I'm thinking of the usual fiber or possibly nylon washers used for transistor isolation as a method of isolating the encoder pcb mounting from the machine frame. The mica sheets for such aren't all that thick if the washer thickness might be a problem in maintaining the spacings. A possible test to see if its VFD generated noise would be to see if it largely goes away when the motor is at full speed, and gets progressively worse as the speed is lowered. It may get better when the motor is at creep speeds too depending on how much losses there are mechanically, and the VFD itself. Some are thyristor based which would act like that, and some are basicly switching regulators driving dc motors, with the switching being done at several kilohertz. Those types could get noisier as the speed goes up, or if a hand is laid on the chuck to load the motor and make it work harder. Basically, look for a correlation between spindle speed and the extra noise pulses. An oscilloscope with at least a 20 megahertz bandwidth can be handier than bottled beer for this sort of troubleshooting. also what about an inductor or capacitor at the encoder in its power line to help smooth any noise introduced there? I have a short run between my encoder and a differential driver. I am wondering about whether I should have some sort of filters on the high impedance inputs of the driver. The thing is that with 50k pulses at 3,000 I'm not sure how much of a filter I could use. This might be a good place to use a piece of that shielded cable too. -- 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) If God had not given us sticky tape, it would have been necessary to invent it. - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Stepper - Following Error
Hi, I'm building a stepper configuration from 2 old floppy stepper motors, and use quadrature signals to control them. For the hal-configuration I started with the stepper_mm config and modified it to output quadrature signals. the steppers move when a jog in Axis, without following errors (even at maximum jog speed), but when I try a coordinated move (g0, g1) I get following errors... I did read http://wiki.linuxcnc.org/cgi-bin/emcinfo.pl?Following_Error and tried to change BASE_PERIOD, MAX_VELOCITY and MAX_ACCELERATION with no effects (except for additional realtime errors when changing base_period) How do I get rid of these errors? Is there anything else that has to be changed when using quadrature instead of step/dir signals? Thanks, Jan - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] oversize transformer question
We picked up a free oversized transformer for our shop 3 phase and the inrush would trip the breaker so it was useless to us. John On 17 Oct 2007 at 11:17, [EMAIL PROTECTED] wrote: Mark already said that the transformers are at least twice as big has he really needs. But they are free (other than shipping), so he's asking us what gotchas there might be in using an oversize transformer. As long as there aren't any technical issues, an oversize but free part often beats a right-sized but expensive one. In this case however, I think inrush current is a significant technical issue. Regards, John Kasunich - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Threading Hickups
if there is a ground loop somewhere in your setup, it won't conduct any current unless it's ... a loop! so when you disconnect the sensor, it breaks the circuit; no current is induced in the wires by stray magnetic fields, and you dont see any voltage. if the noise were 'coming from the sensor' then you should see the noise with it hooked up in a different place, such as on a lab bench. if your differential driver has *really* sensitive inputs, i suppose you could be picking up stray electric fields. this could easily be fixed with a pull-up resistor. but this wouldn't explain the noise going away when the encoder sensor is disconnected. On Wed, 17 Oct 2007, Kirk Wallace wrote: When I was getting index pulses without an encoder disk installed, I decided to disconnect the index connections to see when the noise stopped. The noise stopped as soon as I disconnected the encoder sensor. So either the noise is coming from the sensor, or having the sensor connected promotes the noise. I am going to have to give this some thought in order to plan the next move. - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Threading Hickups
Gene Heskett wrote: A possible test to see if its VFD generated noise would be to see if it largely goes away when the motor is at full speed, and gets progressively worse as the speed is lowered. Basically, look for a correlation between spindle speed and the extra noise pulses. A very easy way to see if the spindle drive is generating the noise is to run the spindle up to top speed and then cut the drive completely and let the spindle coast to a stop. If the signals get beautiful as soon as you turn off the VFD, you know where the noise is coming from. And if they don't, you know it's something other than the drive. Regards, John Kasunich - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] oversize transformer question
Jim Coleman wrote: i was thinking the light bulb idea when i read it, i remember reading an article on a homebuilt 1000 watt audio amp, he did that because of the inrush current tripping a breaker. i was just wondering how many bulbs in parallel it would take to handle the current without blowing instantly? thinking of standard 100 watt incandescents. If you have a 120V line and 120V bulbs, you don't have to worry about them blowing. Even if the load looks like a dead short at turn on, the lights never see more than 120V. What the number of lights does change is the charge time. Each bulb provides a certain amount of current. More bulbs in parallel means more current and faster charging of the capacitors. I think a single 100W lamp would be fine for the power levels we're talking about. Regards, John Kasunich - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] oversize transformer question
It should be possible to use a slightly higher current breaker or one with longer time delay for magnetic devices? Failing that a knife switch with time delay fuses should handle the job. Rayh On Thu, 18 Oct 2007 06:06:15 -0500, Enhanced Machine Controller (EMC) emc-users@lists.sourceforge.net said: We picked up a free oversized transformer for our shop 3 phase and the inrush would trip the breaker so it was useless to us. John On 17 Oct 2007 at 11:17, [EMAIL PROTECTED] wrote: Mark already said that the transformers are at least twice as big has he really needs. But they are free (other than shipping), so he's asking us what gotchas there might be in using an oversize transformer. As long as there aren't any technical issues, an oversize but free part often beats a right-sized but expensive one. In this case however, I think inrush current is a significant technical issue. Regards, John Kasunich - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Threading Hickups
On Thu, 2007-10-18 at 09:38 -0400, John Kasunich wrote: Gene Heskett wrote: A possible test to see if its VFD generated noise would be to see if it largely goes away when the motor is at full speed, and gets progressively worse as the speed is lowered. Basically, look for a correlation between spindle speed and the extra noise pulses. A very easy way to see if the spindle drive is generating the noise is to run the spindle up to top speed and then cut the drive completely and let the spindle coast to a stop. If the signals get beautiful as soon as you turn off the VFD, you know where the noise is coming from. And if they don't, you know it's something other than the drive. Regards, John Kasunich Thanks for the tips. Here is another interesting link: http://www.eng-tips.com/viewthread.cfm?qid=196269page=5 I totally underestimated and overlooked the issues involved with VFD's. I guess they aren't a simple plug and play kind of thing. I plan on using allot more VFD's in the future and developing experience will not only help now but in the future. -- Kirk Wallace (California, USA http://www.wallacecompany.com/machine_shop/ Hardinge HNC lathe Bridgeport mill conversion pending Zubal lathe conversion pending) - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Threading Hickups
Another possible trouble is that your motor frame is not grounded with a low impedance to earth ground. If this is the case, capacitance from motor windings to the motor frame will couple switching spikes from your VFD into your encoder via the motor shaft or encoder cover (metal covers make this effect worse) Peter Wallace - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] oversize transformer question
John Thornton wrote: We picked up a free oversized transformer for our shop 3 phase and the inrush would trip the breaker so it was useless to us. You could probably put light bulbs or reistors in series to magnetize the transformer core in sync with the line, then shunt the resistance out. (Of course, this would not be a standard, off the shelf NEMA setup.) Jon - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Threading Hickups
Kirk Wallace wrote: I used the existing cable which has four shielded twisted pairs. I have one pair for each A, B, I and power. Are the shields grounded at both ends? also what about an inductor or capacitor at the encoder in its power line to help smooth any noise introduced there? I wouldn't. Possibly adding a capacitor across +5 to ground might help. I have a short run between my encoder and a differential driver. I am wondering about whether I should have some sort of filters on the high impedance inputs of the driver. The thing is that with 50k pulses at 3,000 I'm not sure how much of a filter I could use. Is the differential driver module grounded to anything, like through mounting screws? Check if the grounds of the encoder are grounded to the machine frame. Since you have had the encoder all apart anyway, make sure it is NOT grounded to the machine. If ungrounding it is really hard, then run a huge copper braid cable from the machine to the computer/controller grounds (not a bad idea anyway). If you have a scope (not Halscope) look at the index signal all the way from the encoder itself, out of the diff driver, into the diff receiver and finally out of the diff receiver, to see where the noise is getting in. If it is coming directly out of the encoder, possibly a small cap across the power input to the encoder will help. Otherwise, maybe a better ground between the encoder and diff driver is needed so it doesn't see common-mode noise. From previous messages, I think you have 5000 counts/rev, not 50K. 3000 RPM is 50 Rev/sec, x 5K encoder pulses is 25 counts a second. The quadrature frequency would be 1/4 that, or 62.5 KHz. So, a filter with about a 8 us cutoff would be pretty good. The digital filtering I used on the A and B channels wasn't applicable to the Z channel since it doesn't have a predictable state progression, so it has less filtering, and is sampled every microsecond. But, assuming your Z pulse is at least one quadrature count wide, then an 8 us filter might do a lot of good. In your next mesaage, you said : When I was getting index pulses without an encoder disk installed, I decided to disconnect the index connections to see when the noise stopped. The noise stopped as soon as I disconnected the encoder sensor. So either the noise is coming from the sensor, or having the sensor connected promotes the noise. I am going to have to give this some thought in order to plan the next move. This may suggest problems with the encoder, but could be common-mode noise on the encoder ground or noisy power to the encoder. A simple R/C filter might be all that is needed. especially if the noise pulses are just a 100 ns wide or something, the filter should give perfect results. Jon - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Threading Hickups
John Kasunich wrote: Gene Heskett wrote: A possible test to see if its VFD generated noise would be to see if it largely goes away when the motor is at full speed, and gets progressively worse as the speed is lowered. Basically, look for a correlation between spindle speed and the extra noise pulses. I doubt you'd see much difference. The VFD switches 340 V pulses across the motor windings no matter whether it is at 1 Hz or 400 Hz. Would it be because at high speed the motor is at greater load and the current is more in phase with the back EMF? Or, would the noise be gtting worse with reduced on-time of the transistors? I haven't had to play detective with VFD interference, so maybe it would really show such a characteristic, but I wouldn't have expected it. (Might also be a difference between the BIG drives and motors you play with and the ones I have experience with.) A very easy way to see if the spindle drive is generating the noise is to run the spindle up to top speed and then cut the drive completely and let the spindle coast to a stop. Now, this is an EXCELLENT idea! You have to set up the VFD to not do any decelerating or braking, but that is usually a setting that can be done. I did have some non-CNC interference from my mill's VFD, mostly to my computer monitor. I put a Corcom-type line filter box on the line in to the VFD, and it solved the problem. Jon Jon - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Threading Hickups
Kirk Wallace wrote: I totally underestimated and overlooked the issues involved with VFD's. I guess they aren't a simple plug and play kind of thing. I plan on using allot more VFD's in the future and developing experience will not only help now but in the future. I'll be interested to hear what the outcome is. They do produce a LOT of noise. I had to filter the line input to my mill's VFD, it trashed the computer's video monitor. (No harm, just a lot of artifacts on the screen, looked kind of like a chain-link fence.) The line filter completely solved it. Jon - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Generating stick-font toolpaths?
Hi all, I was wondering if anyone could suggest some open-source software for generating toolpaths for making signs. Apparently the preferred kind of font is called a stick font or single stroke font and I have found that there are quite a few commercial packages that do this. We have been using QCAD's CAMExpert demo version (the full version of which is very reasonably priced) but both provide only one such font. Thanks, Pat === Patrick Ferrick Town of Webb School Main Street Old Forge, NY 13420 (315) 369-3222 (315) 369-6216 (fax) - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Threading Hickups
Jon Elson wrote: I did have some non-CNC interference from my mill's VFD, mostly to my computer monitor. I put a Corcom-type line filter box on the line in to the VFD, and it solved the problem. Jon I had the same thing with the fractional HP VFD on my drill press. It was only running a 1/2 HP three phase motor, but it put enough interference back into the AC line that you couldn't use an AM radio anywhere in the house. During baseball season that was unacceptable. A Corcom filter cleaned it right up. Filtering gets a lot more complicated when you start talking about a few HP, but for fractional HP, a 10A Corcom will do wonders for RF interference. Noise getting into encoder signals is NOT the same as AM radio interference. Although a Corcom can't hurt, I would not expect it to help much with encoder noise. That needs to be addressed by grounding, shielding, and use of differential signals. I seem to recall Kirk saying that he has a short run of single ended signals between the encoder itself and the differential driver board. That board should be as close as humanly possible to the encoder, and its ground must be connected to the encoder ground. Any stray currents flowing in the grounds between the two items will result in noise. Regards, John Kasunich - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Generating stick-font toolpaths?
Patrick Ferrick wrote: Hi all, I was wondering if anyone could suggest some open-source software for generating toolpaths for making signs. http://timeguy.com/cradek/truetype Regards, John Kasunich - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Generating stick-font toolpaths?
At 01:45 PM 10/18/2007, you wrote: Hi all, I was wondering if anyone could suggest some open-source software for generating toolpaths for making signs. Apparently the preferred kind of font is called a stick font or single stroke font and I have found that there are quite a few commercial packages that do this. We have been using QCAD's CAMExpert demo version (the full version of which is very reasonably priced) but both provide only one such font. Thanks, Pat If you have not found yet it here is a thread on the subject. http://www.cnczone.com/forums/showthread.php?t=30438 I have in the past done a few characters in single stroke but had the Z changing so that when cut with a V cutter it would make an outline like character but be much faster to machine. Never found (or much looked for) a program to do it for me, would be nice. __ Andre' B. Clear Lake, Wi. - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
[Emc-users] Using Match8
I'm trying to learn how match8 works in a hal file. As I understand if the match8.x.b0 is true and the match8.x.a0 is true then the match8.x.out should be true... This the the hal file # components loadrt threads name1=partest_thread period1=100 loadrt hal_parport cfg=0x0378 addf parport.0.read partest_thread 1 loadrt match8 count=1 # signals and links for the match8 blocks newsig true bit sets true 1 # create signals for the 6-position # jog-selector switch newsig jogsel0 bit newsig jogsel1 bit newsig jogsel2 bit # link jog-selector bits to hardware linksp jogsel0 parport.0.pin-10-in linksp jogsel1 parport.0.pin-11-in linksp jogsel2 parport.0.pin-12-in # determine if the jog-selector bits indicate # an X-jog # the match is if no pins are on linksp true match8.0.in newsig Xjogen bit linksp Xjogen match8.0.out newsig Xsel0 bit newsig Xsel1 bit newsig Xsel2 bit newsig Xsel3 bit newsig Xsel4 bit newsig Xsel5 bit newsig Xsel6 bit newsig Xsel7 bit sets Xsel0 1 sets Xsel1 0 sets Xsel2 0 sets Xsel3 0 sets Xsel4 0 sets Xsel5 0 sets Xsel6 0 sets Xsel7 0 linksp Xsel0 match8.0.b0 linksp Xsel1 match8.0.b1 linksp Xsel2 match8.0.b2 linksp Xsel3 match8.0.b3 linksp Xsel4 match8.0.b4 linksp Xsel5 match8.0.b5 linksp Xsel6 match8.0.b6 linksp Xsel7 match8.0.b7 linksp jogsel0 match8.0.a0 linksp jogsel1 match8.0.a1 linksp jogsel2 match8.0.a2 This is the results in the Terminal Window [EMAIL PROTECTED]:~$ halrun -I -f jog.hal halcmd: start halcmd: show pin Component Pins: Owner Type Dir Value Name 05bit IN TRUE match8.0.a0 == jogsel0 05bit IN FALSE match8.0.a1 == jogsel1 05bit IN FALSE match8.0.a2 == jogsel2 05bit IN FALSE match8.0.a3 05bit IN FALSE match8.0.a4 05bit IN FALSE match8.0.a5 05bit IN FALSE match8.0.a6 05bit IN FALSE match8.0.a7 05bit IN TRUE match8.0.b0 == Xsel0 05bit IN FALSE match8.0.b1 == Xsel1 05bit IN FALSE match8.0.b2 == Xsel2 05bit IN FALSE match8.0.b3 == Xsel3 05bit IN FALSE match8.0.b4 == Xsel4 05bit IN FALSE match8.0.b5 == Xsel5 05bit IN FALSE match8.0.b6 == Xsel6 05bit IN FALSE match8.0.b7 == Xsel7 05bit IN TRUE match8.0.in == true 05bit OUT FALSE match8.0.out == Xjogen 04bit IN FALSE parport.0.pin-01-out 04bit IN FALSE parport.0.pin-02-out 04bit IN FALSE parport.0.pin-03-out 04bit IN FALSE parport.0.pin-04-out 04bit IN FALSE parport.0.pin-05-out 04bit IN FALSE parport.0.pin-06-out 04bit IN FALSE parport.0.pin-07-out 04bit IN FALSE parport.0.pin-08-out 04bit IN FALSE parport.0.pin-09-out 04bit OUT TRUE parport.0.pin-10-in == jogsel0 04bit OUT FALSE parport.0.pin-10-in-not 04bit OUT FALSE parport.0.pin-11-in == jogsel1 04bit OUT TRUE parport.0.pin-11-in-not 04bit OUT FALSE parport.0.pin-12-in == jogsel2 04bit OUT TRUE parport.0.pin-12-in-not 04bit OUT FALSE parport.0.pin-13-in 04bit OUT TRUE parport.0.pin-13-in-not 04bit IN FALSE parport.0.pin-14-out 04bit OUT FALSE parport.0.pin-15-in 04bit OUT TRUE parport.0.pin-15-in-not 04bit IN FALSE parport.0.pin-16-out 04bit IN FALSE parport.0.pin-17-out I have a true on match8.0.a0 and match8.0.b0 but the match8.0.out is false... What am I doing wrong? Thanks John - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Generating stick-font toolpaths?
you could try autotrace with the -centerline option. it wouldn't give you the z-depth for different widths with a conical cutter, but it might look ok anyway. On Thu, 18 Oct 2007, Patrick Ferrick wrote: I was wondering if anyone could suggest some open-source software for generating toolpaths for making signs. Apparently the preferred kind of font is called a stick font or single stroke font and I have found that there are quite a few commercial packages that do this. We have been using QCAD's CAMExpert demo version (the full version of which is very reasonably priced) but both provide only one such font. - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Generating stick-font toolpaths?
John Kasunich wrote: Patrick Ferrick wrote: Hi all, I was wondering if anyone could suggest some open-source software for generating toolpaths for making signs. http://timeguy.com/cradek/truetype Well, at least the sample on the first page is not a stick font. It has line width. For simple engraving of nameplates and instrument panels, a font with zero width is faster to cut, it is always done with a single stroke of the cutting tool. Bobcad has a built-in stick font, bot anything it creates from an external font has width. Cutting these things on a low-RPM spindle machine like a mill is slow enough already without having to carve out the middle of the strokes. Jon - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Generating stick-font toolpaths?
Patrick Ferrick wrote: Hi all, I was wondering if anyone could suggest some open-source software for generating toolpaths for making signs. Apparently the preferred kind of font is called a stick font or single stroke font and I have found that there are quite a few commercial packages that do this. We have been using QCAD's CAMExpert demo version (the full version of which is very reasonably priced) but both provide only one such font. Bobcad provides a stick font, but I thought it was ugly, and so reverse engineered the file format and made some adjustments. I haven't used it in a while, but it did work well. If you can prove your ownership of Bobcad, I could make the changes available. I can't just give it out to anybody, because it is copyrighted property of Bobcad. I only fixed about 4 letters that looked bad. Jon - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
Re: [Emc-users] Using Match8
You must addf match8.0 partest_thread or its outputs will never be updated. Jeff - This SF.net email is sponsored by: Splunk Inc. Still grepping through log files to find problems? Stop. Now Search log events and configuration files using AJAX and a browser. Download your FREE copy of Splunk now http://get.splunk.com/ ___ Emc-users mailing list Emc-users@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/emc-users
