Re: [Emc-users] hal taking machine down

I have had some bad experiences with SSDs. So far in about 18 months I have killed three in my office computer and one in my network server. Three were Kingston V series and one was a Samsung. I had the same issues with all of them. Initially they worked great but after some months they

Re: [Emc-users] hal taking machine down

Most of my failures were on Windows but they didn't seem to be related to power fluctuations. The Samsung failed on my Linux server. I reformatted one of the Kingston drives and stuck it in my Linux house computer. It ran for a couple of weeks before trashing the file system. I always get the

Re: [Emc-users] hal taking machine down

That is a good article. I do most of that apart from changing the I/O scheduler. For reliability I leave journaling on. Les On 04/01/2012 10:54, Mark Wendt wrote: If you plan on running pure SSD's on Ubuntu, this fella put up a very good write up on extending the life of the SSD (limiting

Re: [Emc-users] hal taking machine down

Hi Mark, The SSD on the server is just handling emails and sending out licenses purchased through my web site. I used an SSD to save power as the server runs 24/7. The OS sits on a CF card. Bulk storage is a 1.5TB mechanical drive that is spun down when not in use. In it's current incarnation

Re: [Emc-users] hal taking machine down

If you want the ultimate in low writes, install your OS as a 'live' CD image. There are plenty of instructions on doing this with a thumb drive and they apply equally well to an SSD. You can have a separate partition for your data. I ran my network server like that for quite a while. Some

Re: [Emc-users] running headless on my ASUS AT5NM10-I MB (Intel Atom D510 cpu)

Some kernel mode display drivers can make X fail to start if they don't find a monitor. See this page https://wiki.ubuntu.com/X/KernelModeSetting so see how to turn off KMS for your driver. You will have to create an xorg.conf to manually specify the driver and monitor. I had to do this for

Re: [Emc-users] running headless on my ASUS AT5NM10-I MB (Intel Atom D510 cpu)

Sorry Kent, For some reason I thought you were still running an X server. My bad. Les On 09/01/2012 15:52, Kent A. Reed wrote: Maybe I'm just being thick this morning, but why would I want to start an X11-server on a machine lacking a monitor? Regards, Kent

Re: [Emc-users] Trajectory planning and other topics from a EMC(LinuxCNC) newbie (TheNewbie)

Well, generating an arc as tiny G1 moves seems a poorer solution than G2 or G3 moves... There are a number of reasons for doing this: Many CAM packages don't use arcs internally. Breaking arcs into line segments can greatly simplify the maths. When doing 3D work you can quite often get arcs

Re: [Emc-users] Trajectory planning and other topics from a EMC(LinuxCNC) newbie (TheNewbie)

The big problem is that very often the curves in the drawing are not true arcs. This is especially common in artistic and sign work. The quality of the CAM output is directly dependent on the quality of the input drawing. Drawings that contains just arcs and lines will generate nice clean

Re: [Emc-users] Trajectory planning and other topics from a EMC(LinuxCNC) newbie (TheNewbie)

SheetCam does not support NURBS curves internally. When it imports a drawing, all non-circular curves are broken down into lots of very small line segments. It then does arc matching on those line segments and any other line segments in the drawing before finally merging any ludicrously short

Re: [Emc-users] Trajectory planning and other topics from a EMC(LinuxCNC) newbie (TheNewbie)

No, I was actually working with an OEM who sold a sign software package that generated Gcode (very expensive). The problem was that their software generated way too many short segments for no good reason which caused problems on the machine controls (it wasn't LinuxCNC or Mach3). They

[Emc-users] axis-remote issues

I am trying to use axis-remote and get the following error when I try to send a command to Axis: emc@emc-desktop:~$ axis-remote --reload X server insecure (must use xauth-style authorization); command ignored Has anyone else come across this and if so, how did you get around it? Les

Re: [Emc-users] Trajectory planning and other topics from a EMC(LinuxCNC) newbie (TheNewbie)

An easily customizable GUI would be nice. You very often need to be able to add or remove GUI features depending on the machine. This and jog while paused are the main reasons why I still use Mach on my mill. Les Of course I'm thinking on the developers side, what do integrators wish for? I

Re: [Emc-users] axis-remote issues

Thanks Andy and Dewey. That appears to fix the problem. Les On 23/04/2012 22:27, Dewey Garrett wrote: A work around for this (or at least a similar problem occuring with Ubuntu 10.04 and tk8.5) was incorporated in axis (v2.5 or later):

Re: [Emc-users] Commutating Reactor

Are the servo drives 3-phase as well? If not it may be cheaper to replace the spindle drive with one that is a bit less touchy. My Colchester Triumph 2000 CNC lathe has an inverter designed to run off 415V 3-ph. I use a step-up transformer to take my 230V single phase mains up to 415V single

Re: [Emc-users] OT: need some advice

Depending on the required accuracy one possibility would be the Sharp GP2Y0A21YK IR distance sensor https://www.sparkfun.com/products/242. It would give you a pretty good idea of the board width then refine on that using the stalled stepper/ servo current idea. Les On 13/05/2014 16:37, andy

Re: [Emc-users] OT: need some advice

I don't think you will get 0.5mm resolution from those optical sensors. They would be good to get a rough idea but of you want that sort of resolution you will need something more accurate. To stop the motors moving too far you could make your code hold position if the plate moves beyond a

Re: [Emc-users] EMC2, Compensating for friction

Thinking about it, there are three friction components. Dry friction is proportional to load (i.e if you put a heavy load on the table it will be harder to turn). Viscous friction is proportional to speed. Stiction is the initial resistance to movement and is mainly dependent on how long the

Re: [Emc-users] PC interface

I think EMC having direct control over the motors is a much better setup. Step/dir drivers have numerous disadvantages as you have listed, plus they can lose position when you estop. With EMC controlling the motors, it won't complain if you move the motors while in estop. It will simply keep

[Emc-users] Square corners With G41/G42

I have a question about G41/G42 tool radius compensation. Normally when you have an outside corner while using radius comp, an arc gets added around the corner. While this is the best technique for milling/routing and turning it isn't ideal for plasma/flame/waterjet cutting. With jet cutting

Re: [Emc-users] Square corners With G41/G42

Yes, corner looping makes a big difference but in tight nests corner loops can waste a lot of space. As a worst case, imagine cutting out an array of square parts. The corner loops would result in a big spacing between the parts. I am in the process of adding G41/42 support to SheetCam and was

Re: [Emc-users] Square corners With G41/G42

I have had a couple of customers try to use small offsets but they were never happy with the results. Offsetting a center line path has two problems. First of all the lead in will be incorrect. EMC expects an explicit lead in move when using radius comp. If you don't provide this move then the

Re: [Emc-users] Square corners With G41/G42

in my shop we have used small offsets in EMC2 for a long time we have had no issues of resulting incorrect geometry from entry or exit motion If you look at the docs on radius comp you will see that if you don't have a lead in, the first move will become the lead in. The start of the move

Re: [Emc-users] OT: MPG format

I am a great believer in having 1 MPG per axis. I use high resolution encoders (500 lines upwards) and proper hand wheels so the machine can be operated as a manual. The hand wheels have friction but no indents, just like a manual machine. With a bit of practice you can turn out one-offs or

[Emc-users] Buttons!

When I retrofitted my Colchester Trumph 2000 lathe I left the original control panel in place though it wasn't connected up. Yesterday I knocked up an Arduino based adapter so I now have a panel with 39 buttons (most with an LED indicator) that can talk to EMC through Modbus. It appears to

[Emc-users] Bug in ClassicLadder modbus

ClassicLadder had a bug in it's Modbus implementation if you read more than 8 inputs or coils. The first input bit is not read correctly and ends up with strange values. I don't know the correct way to submit a fix using Git but the fix is simple. In protocol_modbus_master.c, a break; needs to

Re: [Emc-users] Buttons!

Hi Kirk, I made up a comp .c file for each of the Modbus devices I have been playing with. It's not difficult if one knows C. I suppose using Classic Ladder is another option but I don't know ladder. I might look into doing that. If you use Modbus in ClassicLadder you have to have the GUI

Re: [Emc-users] Bug in ClassicLadder modbus

HI Kim, Yup, that's it. Les On 28/03/11 00:09, Kim Kirwan wrote: Hi Les, Thanks very much for submitting this bug fix. I have entered your fix, please take a look and let us know if this is what you wanted: Here's the git commit diff:

Re: [Emc-users] Buttons!

Thanks. I think I will have to go down that route because ClassicLadder is being a real CPU hog. Without the CL GUI loaded my average CPU load with Axis running is 20%. With Modbus enabled and the ClassicLadder GUI running, CPU load averages 80%. Les On 28/03/11 06:16, Kirk Wallace wrote: I

Re: [Emc-users] Buttons!

Hmm, well if I load the user mode part of CL with --nogui then the cpu load is about 20% but I don't have modbus. If I remove the --nogui then I get the GUI, modbus works and CPU load goes up to 90%. Les On 28/03/11 16:46, Dave wrote: Les, I think something else may be wrong. I have used

Re: [Emc-users] Buttons!

I did some tests and the problem is not Modbus itself. It is the GUI. Even if I disable Modbus the GUI really slows my machine down. I would guess the main problem is that I have a lot of rungs in my ladder. I originally set the ladder up about 18 months ago and I seem to remember the GUI

Re: [Emc-users] unexpected realtime delay

From the EMC Wiki: Edit */boot/grub/menu.lst* and add *isolcpus* parameter to the end of the kernel line of the RTAI kernel. The value of the *isolcpus* parameter will be the number of the last core/CPU. Start to count from #0. 1 for dual core/CPU system, 3 for quad core/CPU etc... This

[Emc-users] 'Tool radius not less than arc radius with comp'

Why is it an error for a concave arc's radius to be equal to the tool radius when using tool comp? Admittedly it will result in a zero length move but in that case the move can be simply ignored, just like a zero length linear move is ignored. Les

Re: [Emc-users] 'Tool radius not less than arc radius with comp'

Not if they are the same. The offset arc will have exactly zero length so there wil not be any undercut. Les On 06/04/11 22:23, Dave Caroline wrote: it will undercut the material or the adjoining moves have to be shortened Dave Caroline

Re: [Emc-users] PSU

They work very well. It pays to get ones that are rated at quite a bit above your load current otherwise they do have a tendency to pop. Actually a simple resistor in series with the mains works pretty well. Just make sure it is a wire wound resistor that can take high surge currents. Les

[Emc-users] CSS state

I want to have an LED on my control panel to indicate that CSS is on. Is there currently any way to tell if CSS is on or do I need to create/modify a component to do this? Les -- Benefiting from Server Virtualization:

Re: [Emc-users] CSS state

Thanks Kirk, In that case it would probably be better to add another pin to halui. That strikes me as the most logical place to do it. I was just hoping that there was a hal pin floating around that already indicated the CSS state. Les On 19/04/2011 15:32, Kirk Wallace wrote: Shooting in

Re: [Emc-users] Router Cutter v Milling Cutter

Hi Andy, Don't use HSS on MDF. MDF is very abrasive and destroys HSS cutters very quickly. Even carbide wears pretty fast. Les On 28/04/2011 13:11, andy pugh wrote: I hope to machine some MDF on my milling machine this evening. I need to by a longer tool, and have the choice of a suitable

Re: [Emc-users] Router Cutter v Milling Cutter

That feed looks a little slow to me. I regularly run 4m/min (160IPM) at 18k RPM with a single flute 1/2 replaceable tip cutter. Admittedly I tend towards shallower DOC, say 10 - 12mm for a full cut. IME, for spiral or PCD cutters to justify their extra cost you need to really work them hard.

Re: [Emc-users] Router Cutter v Milling Cutter

It does depend on what you are cutting. Most of the work I do on that machine is 12mm and 18mm MDF. Generally I use two passes, one deep and one shallow. If I use two even passes or one full depth pass I tend to get problems with the parts moving as the vacuum bed on that machine isn't

[Emc-users] Jog wheel in teleop mode

Is it possible to use jog wheels in teleop mode? I have been doing some experimentation and can't seem to get it to to work. I can jog fine in joint mode but when I switch to teleop mode the jog wheels appear to do nothing. Les

[Emc-users] Jog wheel in teleop mode

Is it possible to use jog wheels in teleop mode? I have been doing some experimentation and can't seem to get it to to work. I can jog fine in joint mode but when I switch to teleop mode the jog wheels appear to do nothing. Les

Re: [Emc-users] Set absolute zero to 0 using softwarefor lathe.

Here is how I did it for a similar job. It was cutting a failry flexible material so I had to increment X as well as Z but you can just set xstep to 0. #ndiscs = 10 (number to cut) #zstep = 6.5 (amount to increment Z each time) #xstep = 0.007 (amount to increment X each time) (for 10 discs z=0

Re: [Emc-users] Manual control while in tool change dialog

I have to admit I haven't used it a lot but I believe Steve Blackmore uses it quite a bit. I seem to remember a discussion about a better implementation a little while back. Les On 07/05/11 16:09, Tom Easterday wrote: Thanks for the link. Yes, with some more digging I see this has been

Re: [Emc-users] Newbie w/mobo question

I have been using SSDs for a while and I have had more problems with them than with mechanical hard drives, especially with intensive use. They are very fast but I am not convinced of their long term reliability. At least when they do fail it is usually failure to write rather than loss of

Re: [Emc-users] DC Brush servo drives

I use one on my lathe which has an even bigger motor on the Z. I have had no problems whatsoever with the drive. It works very well. You do need to build your own power supply. This can be fairly simple, just a large transformer feeding a rectifier and smoothing capacitors. At this power level

Re: [Emc-users] Alarms

also like to do this for low air pressure Thanks / * Description: message.comp * Message HAL component. * * Author: Les Newell les at sheetcam dot com * License: GPL Version 2 or later * * Copyright (c

Re: [Emc-users] Alarms

No problem. Les On 30/08/2011 15:15, Viesturs Lācis wrote: arm message when a HAL pin changes state. I think that this component deserves to be included in EMC2. Viesturs -- Special Offer -- Download ArcSight

Re: [Emc-users] Dust-proof case?

In general wood dust does not affect computers that much. I have seen machines with piles of dust inside, still working fine day in day out. Heat is an issue so do as much as possible to keep it cool. Possibly fit an over sized CPU cooler. If you want to enclose the computer in a box, fit a

Re: [Emc-users] Dust-proof case?

LOL That's pretty much exactly what I suggested :-) Les On 04/11/2011 14:32, sam sokolik wrote: john K did a nice write-up on what he did http://jmkasunich.dyndns.org/cgi-bin/blosxom/shoptask/cooling-02-13-07.html sam

Re: [Emc-users] Dust-proof case?

I wouldn't bet the problem is heat related. How dirty is the computer inside? You need quite a lot of dust to make a noticeable difference. That is why I would like to put them in totally sealed box. In that case I could implement water cooling for PC components. What should I do about

Re: [Emc-users] Has anyone tried to use and RC controller with EMC to run a RC brushless

This is a legacy of the RC data format. The signal is transmitted as a series of short fixed width pulses, one pulse per channel. The time between each pulse gives the output pulse width for that channel. This repeats for the rest of the channels. 20ms gives enough time for 8 channels plus a

Re: [Emc-users] Has anyone tried to use and RC controller with EMC to run a RC brushless

By the way, virtually all brushless ESCs will accept a frame rate of up to 400Hz (2.5ms interval). I do that in my quadcopter controller to increase the bandwidth. Quadcopters need very fast ESC response for stability. Les On 08/11/2011 16:09, Jon Elson wrote: This is the RADIO format, where

Re: [Emc-users] Cam Grinder

I don't see a problem with using the standard PID loops. I did something similar to this with my lathe for turning some non circular parts. I couldn't use a very high spindle speed but I'm sure it was faster than you would need while grinding. Les On 29/05/2013 12:13, Marshland Engineering

Re: [Emc-users] Cam Grinder

Yup, that is pretty similar to what I did only in my case the parts were tapered and hexagonal. Les On 29/05/2013 12:48, andy pugh wrote: On 29 May 2013 12:41, Les Newell les.new...@fastmail.co.uk wrote: I don't see a problem with using the standard PID loops. I did something similar

Re: [Emc-users] Cam Grinder

My HAL component used a simple lookup table that mapped spindle angle to X position. The table was generated by SheetCam so I could cut any shape I could draw. It's still on the machine but it has been so long since I last used it I can't remember how it all tied together. I also have a

Re: [Emc-users] Cam Grinder

How fast do you turn the cam while grinding? Les On 29/05/2013 13:23, Leonardo Marsaglia wrote: I do make camshafts for living, and I'm controlling a cam grinder with LinuxCNC but only for positioning, since the grinder uses a master to make the lobes. I'm always thinking about using cnc to

Re: [Emc-users] Cam Grinder

I don't see any problems with that sort of spindle speed. The normal PID loops will maintain pretty good tolerance. If your X axis is heavy you will need a reasonably powerful motor to provide the acceleration. Les On 29/05/2013 13:36, Leonardo Marsaglia wrote: About 120 RPM for the first

Re: [Emc-users] mail list over forums?

Depending on the forum software being used it may be possible to integrate the mailing list and forum. The SheetCam forum is set up like this so any posts made on the mailing list also appear on the forum and vice-versa. It isn't perfect and can occasionally be confusing but it does mostly

Re: [Emc-users] Crowbars

Contactors are generally a lot more robust than relays. Since switching to contactors on my supplies I have never had any welded contact issues. I normally switch the AC before the rectifier instead of the DC. This does mean the smoothing caps are permanently connected to the load but in my

Re: [Emc-users] Delon Doubler

On 21/10/2013 18:30, andy pugh wrote: If you are going to use a transformer, why use the doubler at all? 24V transformers with beefy secondaries are relatively cheap and easily available. 240-415 transformers are large, expensive and difficult to find. Les

Re: [Emc-users] USB Camera for edge finder?

I haven't had a huge amount of success with those endoscopes. They are fixed focus and the one I had only gave about 15 FPS. The Supereyes microscopes like this http://www.ebay.co.uk/itm/Supereyes-200x-Portable-Digital-USB-Microscope-Enodscope-Video-Camera-LED-TE01-/190884342766 work quite

Re: [Emc-users] USB Camera for edge finder?

Hi Gene, I got one of those short fat microscopes and it was really rubbish. The focusing mechanism also moved the lens side to side slightly and it wouldn't hold focus for more than a few seconds. It ended up in the bin. Les I looked at that one rather hungrily Les, but lost interest when I

Re: [Emc-users] Plasma

Hi Viesturs, If you are mainly planning on cutting aluminum I would suggest looking into oil mist cooling instead of flood coolant. You only need a trace of oil in the mist to act as a lubricant while the air clears the chips and cools the part. It works very well. You can get vegetable based

Re: [Emc-users] Computer Boards?

On Linux an SSD will last for a very long time. If you are paranoid you can use the suggestions on the LinuxCNC wiki for compact flash cards but it probably isn't necessary. I would't run an SSD on Win7 or Win8. They thrash the drive nearly all the time and will wear out an SSD surprisingly

Re: [Emc-users] Computer Boards?

Hi Jarrett, I've had bad experiance and good. (I'm sorry Les but I'm going to contradict you [absolutely no offense intended]) It is good to hear a differnt point of view ;-) One thing that I feel makes a big difference when it comes to SSD's is the quality of the drives. I only use

Re: [Emc-users] Limestone cnc

Generally stone is cut with diamond tooling and lots of water. Spindle speeds are relatively low, between 1500 and 8000RPM depending on the tool. A router will work for a while but the water will kill it pretty quickly. As Ben says, the dust/mud gets everywhere so you need to overbuild and pay

Re: [Emc-users] For anybody considering upgrading their motherboard in the next few months.

I am afraid I gave on on Gnome a long time ago. KDE works quite well if you turn off some of the more silly animation stuff such as wobbly windows. Les On 17/09/2012 15:21, Eric Keller wrote: I have been using both Fedora and Ubuntu, and the desktop decisions that they have forced on us are

Re: [Emc-users] Floating plasma torch - asking to share experience

If you want to go with the auxiliary slide idea you can often pick up short linear slides off eBay for peanuts. Bolt on your torch, add a switch and the job is done. I have some nice 100mm long THK rails here that I bought for this purpose. I have been thinking about this for some time and a

Re: [Emc-users] Inductive Coupling

I have one of those. I bought it for a similar price a few years back. I did look into making an inductive pickup for it but never got very far as I also picked up a Renishaw LP2 probe at about the same time. I made a QC30 holder for the LP2 with an infra red emitter that fires up the hollow

Re: [Emc-users] Modbus

Yes, that should work. I run my control panel through a usb-rs232 converter. I have found the USB side to be a little sensitive to noise. Very occasionally it will lose connection. At that point I need to restart LCNC to reconnect which is a PITA. This is probably very specific to my setup.

Re: [Emc-users] Modbus

Thinking about it, I may have one of them lying around... Les On 18/12/2014 16:28, Marius Liebenberg wrote: This in not unique to your setup but rather a USB problem. The thing to do is to use a isolated USB connection. The problem is mostly due to ground potential differences between

Re: [Emc-users] Velocity closed loop + Position losed loop on an axis

Nice. Unfortunately this particular job is cost sensitive so I'm currently doing everything in a PIC. Les On 27/03/2015 16:11, Peter C. Wallace wrote: Not sure about the other ones but the Mesa driver has a settable timeout for velocity estimation (settable in seconds) before giving up and

Re: [Emc-users] Velocity closed loop + Position losed loop on an axis

Hi Peter, That is a good way to estimate speed. I'm not sure how well it would have worked in my application because it may be many servo periods between counts. Les On 26/03/2015 20:23, Peter C. Wallace wrote: The LinuxCNC software encoder counter and at least the Mesa and Pico Systems

Re: [Emc-users] Velocity closed loop + Position losed loop on an axis

Recently I used an encoder for both velocity and position on a specialist application (not using LinuxCNC) and it worked very well. Velocity is calculated by measuring the time between successive encoder counts. This application uses a very coarse encoder (144 counts/rev) and it only runs at

Re: [Emc-users] Cnc routers

Keep in mind you don't have to get the table absolutely perfect. Fit a wood/MDF backing board on the table then skim it flat usign your router head. Even if the machine is slightly twisted this will compensate for the twist. It pays to use the biggest cutter your spindle will handle and run at

Re: [Emc-users] Cnc routers

Hi Gene, I believe the lower belt is glued to the track so it cannot move, effectively making it a rack. Les On 22/04/2015 13:02, Gene Heskett wrote: Certifiable slicker than snot on a doorknob. I can see why they would patent it. I wonder how long till it would take to stretch enough to

Re: [Emc-users] micro-v belts, smaller

I just ran the numbers and for the dimensions you gave the belt length is almost exactly 375mm. For those sizes I'd use a HTD toothed belt. Pulleys are fairly cheap and belts are easily available in wide range of sizes. It is a pity your belt is so short. Automotive poly-V belts are available

Re: [Emc-users] micro-v belts, smaller

I work out belt lengths using CAD. Draw the pulleys as simple circles in their respective places then draw the belt path from pulley to pulley (my cad has a tangent snap making this really easy). Cut out the unwanted bits of the pulleys leaving the belt path as one continuous outline. Use the

Re: [Emc-users] micro-v belts, smaller

tedious redrawing everything unless you have parametric cad. Les On 05/05/2015 13:35, andy pugh wrote: On 5 May 2015 at 13:28, Les Newell les.new...@fastmail.co.uk wrote: I work out belt lengths using CAD. Draw the pulleys as simple circles in their respective places Which diameter works best? I

Re: [Emc-users] How to lie properly in CNC programs.

Don't use Schrödinger's cat. It's both dead and alive at the same time... Les On 08/07/2015 10:11, Mark Wendt wrote: On Tue, Jul 7, 2015 at 6:21 PM, Greg Bentzinger skullwo...@yahoo.com wrote: snippage There may be many different ways to skin a cat - but first I'm told I have to kill the

Re: [Emc-users] How to lie properly in CNC programs.

On 08/07/2015 14:44, Gene Heskett wrote: Chuckle. And I've always wondered, with the shortage of cat skin products on the market, just what DOES get done with all those cat skins? ;-) https://www.youtube.com/watch?v=uJfM23iChzs Les

Re: [Emc-users] coolant/lube line

Hi Raymond, From your description your current hose is probably PVC. PVC is naturally quite hard but plasticizers are added to make it flexible. Over time those plasticizers break down and are dissolved by oils so the plastic hardens. Urethane should be fine. It would probably be my choice

Re: [Emc-users] VFD Tweaking

One way to avoid the arcing problem is to add some inductance to each phase between the VFD and motor. The inductors slow down those fast switching edges and protect the motor windings. If you know what you are doing you can also add some capacitance after the inductors to get an almost perfect

Re: [Emc-users] Cutsim update

Hi Anders, Just a note to add to the instructions. On a pretty bare Ubuntu install I needed apt-get install libqglviewer-dev libboost-all-dev I tried opening a file as per the instructions but when I hit play I just get an error: Interpreter exited with error Unable to a open file. I have

Re: [Emc-users] Lathe saddle protection

I have a Denford Orac with a switch on the saddle and an adjustable stop that clamps on the bed. I also use another machine that has a fixed switch on the headstock and is an adjustable rod on the saddle to set the trip point. These has saved the machines from damage a couple of times and I

Re: [Emc-users] Lathe saddle protection

On 20/11/15 12:30, andy pugh wrote: > One concern with any such idea would be that swarf might trip the > sensor. Some super-clever frequency analysis might be needed (3x or 4x > spindle speed) to tell the difference. A mechanical switch is probably best in this application. Swarf is unlikely

Re: [Emc-users] Lathe saddle protection

> I wonder how a hall effect might work, to sense the chucks jaws going > by when it gets too close? I think I'd boost the length of its output > pulse with a one shot to make sure its triggering wasn't missed though > when the servo thread is the only one, no base thread to read it every >

Re: [Emc-users] Plasma Mistake

Hi Jim, There are a few precautions you can take so forgetting to clamp the ground doesn't destroy your electronics. First use a star ground. Weld a bolt to the frame of your machine and connect that to your supply mains earth. Now make sure the mains earth for your computer and plasma cutter

Re: [Emc-users] OT Seating Tire Bead

> I expect it will be flat again in the morning as my last mowing took me > across some rosebush runners which probably perforated it several more > times. If the tyre is on it's bead just stick in some tyre sealant and pump it back up. OKO is a common brand of sealant here in the UK. Use the

Re: [Emc-users] OT Seating Tire Bead

> https://www.youtube.com/watch?v=KTaSvS0yNWI > > I am not really an advocate for this method, but I'm not saying I might not > try it as a last resort. Works a treat but can be scary to do. Last time I did it I left the valve core out to try to reduce any over pressure. The ratchet strap

Re: [Emc-users] Wyse S30 terminal as a CNC computer?

Those are a bit under powered. Laptop IDE is very common in thin clients. I use a Wyse Rx0L thin client as my network file server. It is a bit more powerful and has 2xSATA onboard and 1 x laptop IDE. On my file server I use all three ports (plus one USB drive). It has performed faultlessly

Re: [Emc-users] WYSE update, can LCNC run on this Linux?

I wouldn't use a SD card as main storage. SD cards are slow. I used to use CompactFlash cards before SSDs became affordable and they are pretty slow as well. You can get laptop IDE to SATA adapters. That would allow you to fit an SSD. Ideally you want an adapter with a male connector so you

Re: [Emc-users] Emco lathe conversion to servos..

Using analog should be more accurate. With step/dir the drive has to estimate the commanded speed and position based on the steps. LCNC has much more accurate commanded position and velocity figures. It can also use tricks like feed forward. IMHO using step/dir negates some of the advantages

Re: [Emc-users] Leadshine closed loop steppers

That isn't a particularly big servo. Much bigger servos are available. For example the brushed DC servos on my router are rated at 8.5NM continuous at 10A, 50NM peak at 60A (ISTR the drives are limited to around 30A). They are 1:1 drive onto 25mm pitch screws. Brushed DC servos tend to be

Re: [Emc-users] Emco lathe conversion to servos..

Several years ago I modified a Compact5 with a step/dir servo for Z and the original stepper for X, running Mach3. I also fitted a different motor in the tool changer as the original was painfully slow. There is a very poor quality video here If I

Re: [Emc-users] LinuxCNC laser cutter?

On 24/10/2016 22:25, dan...@austin.rr.com wrote: > So there is another mode I didn't mention. When accelerating or > decelerating, you're not at the specified cut speed, and the laser power must > be reduced proportional to the speed. > A better way to solve this problem when raster engraving

Re: [Emc-users] LinuxCNC laser cutter?

iting factor. > > - Original Message - > From: "andy pugh" <bodge...@gmail.com> > To: "Enhanced Machine Controller (EMC)" <emc-users@lists.sourceforge.net> > Sent: Tuesday, October 25, 2016 6:30:00 AM > Subject: Re: [Emc-users] LinuxCNC lase

[Emc-users] 6I24 PCI or 7I80 Ethernet?

I have a couple of rebuild projects coming up (a router and a milling machine) and I am trying to decide between PCI or Ethernet. I like the idea of Ethernet because it will probably be around long after PCIe has disappeared but the idea of it running in user space instead of realtime makes me

Re: [Emc-users] 6I24 PCI or 7I80 Ethernet?

Thanks Sam, The router's servo drives are old and probably wouldn't gain any benefit from going greater than 1kHz. The mill is a bit more up to date but again 1kHz is probably enough. It's not a high speed machining centre. Chris, the hardware does the very fast stuff such as encoder counting

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