What does CMM machines use in software

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03 Sep 2024 11:57 - 03 Sep 2024 11:58 #309277 by mighty_mick
What does CMM machines use in software was created by mighty_mick
Hello folks.
I am wondering about CMM machine softwares. Are they using LinuxCNC? If they are not using LinuxCNC, would it be appropriate solution for these kind of machines? Do you know any open source CMM machine, CMM software etc.?

Thank you for your time.
Last edit: 03 Sep 2024 11:58 by mighty_mick.

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04 Sep 2024 05:26 #309329 by yrsiddhapura
Replied by yrsiddhapura on topic What does CMM machines use in software
Well just recently i have talked with Mitutoyo Application and Services engineer(From Japan) according to him Linuxcnc Could work for motion part only and also requires to develope some kinametics coz CMM and CNC both use diffrent kinametics and he also suggest me to lookout for develope DMIS(Dimensional Measuring Interface Standerd) application you required Point Cloud Library and 3D cad data reader and converter and also high speed(in term of time not velocity) interface for reading Feedback Encoder and probe signle interface.
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04 Sep 2024 14:37 #309361 by mighty_mick
Replied by mighty_mick on topic What does CMM machines use in software
Thank you, yrsiddhapura. I am only talking about in the machine context. When we think a CMM machine, what software controls it's motion, axises etc. Can we consider a CMM machine as very sensitive CNC machine which is controlled by LinuxCNC? They both have axes, they both can run with probes etc. I mean can we build a simple CMM machine with LinuxCNC. They both work with coordinate system in software.

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05 Sep 2024 11:41 #309402 by sivaraj
Replied by sivaraj on topic What does CMM machines use in software
For any Machine tool or CMM the underlying motion control part is the same.
But the user program is in a different format for machining or measuring applications
LinuxCNC uses the G-code standard interpreter meant for machining applications.
CMM uses the DMIS standard interpreter which is meant for measuring application - DMIS is a method to capture and record the required data points
Yes It is possible to create/add measuring cycle with G-Code by modifying the Linuxcnc interpreter but user program will not be a standard DMIS program
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05 Sep 2024 14:34 #309415 by mighty_mick
Replied by mighty_mick on topic What does CMM machines use in software
Thank you sivaraj.

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05 Sep 2024 14:41 #309418 by juliankoenig87
Replied by juliankoenig87 on topic What does CMM machines use in software
Hi.

I recently wrote some macros for a pyvcp panel. Tilman and I called it easyprobe. (github->hausen8->easyprobe) In the newest version I implemented a routine to measure as many points one like an write the values in a txt file.

So yes. One xould build some kind of panel or screen and get some usefull results. Maybe of intrest.

Best regards
Julian

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07 Sep 2024 05:48 - 07 Sep 2024 05:49 #309537 by yrsiddhapura
Replied by yrsiddhapura on topic What does CMM machines use in software
It might help www.govinfo.gov/content/pkg/GOVPUB-C13-7...a686274dfb3187ad.pdf this paper were writen by NIST(Same institute developed EMC) its use EMC(Linuxcnc's was once EMC)
Last edit: 07 Sep 2024 05:49 by yrsiddhapura.

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07 Sep 2024 09:50 #309553 by andypugh
Replied by andypugh on topic What does CMM machines use in software

Yes It is possible to create/add measuring cycle with G-Code by modifying the Linuxcnc interpreter but user program will not be a standard DMIS program

Ah, but, LinuxCNC supports pluggable interpreters. It would be straightforward (though a lot of effort) to write a complete DMIS interpreter for LinuxCNC. 

If you have an old, non-motorised CMM and just want a system to display and log the positions, then LinuxCNC could be a good choice as it has a number of GUI creation frameworks and can count encoder pulses (and other feedback types) accurately and reliably. 

I am currenlty working on an old Faro arm, and in that case I am just setting it up as a USB-HID device. Plug it into your PC and it will just "type" the coordinates into a spreadsheet or text file every time you press the button on the probe tip. 

 

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07 Sep 2024 09:57 #309554 by andypugh
Replied by andypugh on topic What does CMM machines use in software

It might help www.govinfo.gov/content/pkg/GOVPUB-C13-7...a686274dfb3187ad.pdf this paper were writen by NIST(Same institute developed EMC) its use EMC(Linuxcnc's was once EMC)
 

Oh! 

I wonder how far-removed that is from the LinuxCNC codebase? 

The "Canonical comands" that are listed look very much like the LinuxCNC ones that the G-code interpreter generates. 
github.com/LinuxCNC/linuxcnc/blob/master...mc/nml_intf/canon.hh

 
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09 Sep 2024 03:58 #309706 by yrsiddhapura
Replied by yrsiddhapura on topic What does CMM machines use in software
@andypugh i havent done any further study of code as right now busy with mine project but i found this document few days ago when want to build a poormans CMM for fun but its very very side project. and wish you all the best with your faro arm its seems quiet interesting pls update on forum or your youtube channel.

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