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I have now gotten the tool changer working mechanically and electrically tied in with LinuxCNC. 


Next step is to set up the carousel comp. Since my lathe is still running 2.8.2, and I never updated it, the version of Carausel.comp will still be the one with the bugs identified here...
www.forum.linuxcnc.org/10-advanced-confi...carousel-toolchanger

I see three options.
1/ patch the carousel I have and recompile it
2/ download the current carousel.comp from github and compile it.
3/ upgrade my full installation from 2.8.2 to 2.9.8, and then the current carousel will already be covered.

linuxcnc.org/docs/html/getting-started/updating-linuxcnc.html
I read the wiki that it is recommended to do a clean install, but I am hestitant to do that with a working system. Wish me luck.
Cheers,
Mark
 

Hi smc.collins,

Hello smc.collins,
As an occasional user of FreeCAD, I feel exactly the same way. The topology problem isn’t intuitive to grasp. These issues also existed—and still exist—in the professional CAD software “Catia V5”! But the software handles them differently. It shows me which references are incorrect or no longer exist. FreeCAD doesn’t do that yet. Mango Jelly has uploaded a video to YouTube that gives us users a better understanding and shows a way out of the topology problem traps. I also wonder what the topology problem has to do with CAM... 
Solidworks and MasterCam is an exellent Combination.

 
Hi all,

I am developing a 4-axis foam cutter using a Bigtreetech Octopus Pro V1.0.1 F429 connected to a Raspberry PI5 via SPI.
I have amended the Config.txt file, the .hal and .ini, and named the axis as X, Y, A and U.

What happens is the following:
1- X and Y axis work fine.
2- If I try to move the A-axis, then both A and U move.
3- If I try to move just the U axis, then nothing happens.

What am I missing?

I have attached the board pin mapping, the Config.txt and my .hal and .ini files, which were modified from those in the remora "ConfigSamples"  directory.

Cheers
Pier


 

Hi i can get cheap a q6a with 8gb ram. I read that its more powerful then a raspberry pi 5.

But here i cant find Informations.

Is it useless for us?

Thanks

Haha read-check
Ten times more than I got, still only 30 mikroseconds.
Could be enough if you are close to the limit. But you shouldn't be, I guess. Are you?

Record position feedback and commanded position when the clunk happens.
There ought to be something.

Hakan wrote:

Record lcec.0.pll-err with halscope. Should stay low.

as i said it bounces plus or minus 30000 or so

Record lcec.0.pll-err with halscope. Should stay low.

Cat6 come in both shielded and unshielded, need look at the cable specs, also the heads have metal, and you can check continuity for shielding, other than that, sharing your configuration would maybe tell us more.

I’m wondering if the ZimaBoard 2  shop.zimaspace.com/products/zimaboard2-single-board-server  is a good machine for LinuxCNC (with an Ethernet Mesa card).

Bumping an old thread… Can these g37 & g37.x macros from Pathpilot be used in LinuxCNC and is the code available? I’m also looking to use a tool setter to automate tool length measurements after M6.

Linux noob. Downloaded latest Live image. Burned on DVD. Put in old Compaq tower running Vista. Booted from DVD, everything worked. Installed to hard drive. Worked. Poked around in a few directories. Set time zone. Went to bed. Now it boots, gets to login screen, enter id and password, logs in and loses display. No clue where/how to troubleshoot. Any help greatfully accepted! Thanks,
Darren.

Hi Rod, Thanks for the feedback. Unfortunately it does not have THCAD5, and this is what I am using. So calculator does not allow me to double check. It does have THCAD10 and THCAD300. So I have set to 10, and the Voltage scale is 1/2. So hopefully this makes sense. The setting I have are now: THCAD2: Low (i.e. Down) 5V, Frequency divider: 1/32. 0V 95.4, 5V 896.0. Gives me the following as set by pnconf: Voltage Scale 0.005996, Voltage Offset 2981.25. Plasma machine: Unimig Razorcut 45 CNC port is set to 30:1 ratio. I set the Plasma to 30:1 ration as a precaution. Do people think this is necessary, or would 20:1 be fine? It is a 45A plasma cutter.

Hello everyone, I am working on an upgrade for my old lathe. In short, I want to replace the old main motor with its multiple belt stages as well as the change gear system for the lead screw with two servos (more detail below). I am wondering whether or not LinuxCNC is the right way to go about it. I am a mechanical engineer by trade, but have little to no experience with control systems or LinuxCNC, so I do apologize in advance for any potential stupid questions coming up. 

The long version:
I want to upgrade my lathes drive system. It's an old machine, build somewhere around 1945, and it uses an induction motor followed by two v-belt, one flat belt and an optional gear stage to set the spindle speed, giving me a grand total of 12 possible spindle speeds to select from. Changing speeds therefore also isn't the quickest process. Even worse is the feed gearing driving the lead screw; It's set up as a change gear type system, so to set the feed rate I have to disassemble and then reassemble the drive train, which makes for painfully slow changes in feed rate. While the machine is certainly mechanically beautiful, my shop is not a museum and my time is quite precious to me, so I want to change that. The plan is to replace the main spindle motor and drive train with a big servo, and the feed gearing with another, smaller, servo. That would allow for easy changes of my feeds and speeds, as I just need to set whatever value I want on the controller. The feed rate per revolution would then no longer be controlled mechanically through the feed gearing, but electrically, by the smaller servo acting as a virtual reduction gearing if you will.

I already sourced the servos, a 1kW for the spindle and a 400W for the lead screw. They use EtherCAT for communication. For the controller I was thinking about either a Raspberry Pi 4 or a Kunbus RevPi that I have lying around. To run the machine I want to use LinuxCNC and an open source EtherCAT master, as done by Marco Reps for example.

I am however unsure on how to go about it. I don't yet require the full CNC potential of LinuxCNC; That might come at a later point, but for now, all I need are the following two features:

• Set the spindle's rpm
• Set the feed rate

Both of those options I would like to have on an easy GUI, ideally with as little unused "clutter" as possible. Depending on how hard that is to pull off, I would not mind learning how to program/code/design that myself, it might however quite likely be far above my current skill level. I am a mechanical engineer after all, not a software wizard. 

For the actual servo control I would like the option of having soft start and stop options by controlling the acceleration and jerk, so that the servo doesn't just violently try to reach the set spindle rpm.
Ideally the feed servo would be set up as a slave, following the main spindles rpm precisely, i.e. perfectly mimicking a mechanical gear train. So if for example the main spindle bogs down during thread cutting, the feed servo should ideally not just run it's course and lose synchronization. That should certainly be possible via EtherCAT, I just don't know how hard that would be to set up with LinuxCNC. It would however also be acceptable to solve that via a maximum allowable tracking error for the servos, if full on synchronization doesn't work.

I have a lot of ideas and things I would at some point like to add/have, from motor load indicators, a DRO via linear encoders, small easily programmable cycles all the way up to full on CNCing the lathe. But for now its baby steps, i.e. getting the lathe functional with its new servo drive train.

Is what im having in mind possible with LinuxCNC? Does anyone have pointers to a similar project? Or any advice or resources on how to set this up in LinuxCNC? How do I go about setting up the big servo as a spindle motor? Can I actually use the smaller servo as a slave synchronized to the main spindle motor? Is it possible to create a simple custom GUI showing only spindle speed and feed rate? Or would you guys recommend an entirely different route to set this up?

Any advice is greatly appreciated. I apologize if the post became a bit "rambly" in places and for any stupid/basic questions contained in it.

Cheers,
Nik

The 7i92TF is the best fit in my situation.

The manufacturer claims the pinout of the parallel connection to the drivers/switch interface is parallel port compatible but does not state signal levels for each pin. Multiple manufactures do supply devices for it. The final test of cause is in trying it with a 7i92T module.

Thanks for the advise.

Kind regards.

Did you add it to the LinuxCNC repo or do you plan so?
Would be nice to have it in the sources if not already there.