Axis_Comp having no effect

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04 Sep 2025 00:36 - 04 Sep 2025 00:42 #334380 by CNC4Life
Axis_Comp having no effect was created by CNC4Life
I'm trying to axis comp a machine with a Renishaw ML10 Interferometer. Unfortunately no matter what comp type or file formatting I can come up with I cannot get the system to take effect. The machine is repeating +/- .001mm on every step of the run.

I've been working on this for days and had no luck. I also can't get any feedback from HALSHOW that mentions it in effect or a component related to compensation. My understanding this a rolling backlash table to linuxcnc, hower the values never change. The man pages are extremely sparse, but strait forward. Name a file, stuff it with (Target)  (POS Move) (Neg Move) and select a type 0 or 1.

Please help! I offer cookies of all types.
Last edit: 04 Sep 2025 00:42 by CNC4Life.

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04 Sep 2025 00:40 - 04 Sep 2025 00:41 #334381 by CNC4Life
Replied by CNC4Life on topic Axis_Comp having no effect
Also of note the units in the RTL File are um so .001mm. Pass 1 is -5 to -170 and Pass 2 is -170 to -5.

The .zip is a zipped .xls file.

 
 
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Last edit: 04 Sep 2025 00:41 by CNC4Life.

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04 Sep 2025 02:45 - 04 Sep 2025 17:00 #334383 by PCW
Replied by PCW on topic Axis_Comp having no effect
Just a guess, but I think your screw compensation table is backwards:

"Compensation files must start with the smallest nominal and be in ascending order to the largest value of nominals"


 
Last edit: 04 Sep 2025 17:00 by PCW. Reason: sp

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04 Sep 2025 16:43 #334416 by andypugh
Replied by andypugh on topic Axis_Comp having no effect
If the comp table is backwards then the interpolator function will only ever read the first value, so you will get a fixed offset, and no apparent compensation.

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