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  • Lcvette
  • Lcvette's Avatar
06 Aug 2025 05:09
Replied by Lcvette on topic Probe Basic ATC Questions

Probe Basic ATC Questions

Category: QtPyVCP

Enter these numbers in your var file...

kcjengr.github.io/probe_basic/probe_basic_parameters.html
  • Lcvette
  • Lcvette's Avatar
06 Aug 2025 05:05
Replied by Lcvette on topic Probe Basic ATC Questions

Probe Basic ATC Questions

Category: QtPyVCP

You need to update the var file parameters, also in the docs.

I'm not sure what you mean about the tool table and the rack the rack stores tools the tool data is stored in the tool table. The rack holds whatever tools you put in it they don't have to be in order it tracks them persistently as long as you have the var file set up. When a tool is loaded from the rack and you use the offset for stored in the tool table everything works as expected it works perfectly fine with cheat code. You call the tool not the rack number.
  • heaven
  • heaven
06 Aug 2025 04:05 - 06 Aug 2025 04:06
vibration at lowspeed. was created by heaven

vibration at lowspeed.

Category: Advanced Configuration

I'm developing a feature that is called "admittance control", it's a method to control motor base on external force.
The system workflow is:

External force (from ft sensor)-> admittance module (100Hz update rate) -->joint cmd--> simple_tp/limit3 (1Khz) -> ethercat -> driver motor

The admittance module will convert external force to joint-cmd to control motor. Everything look fine except vibration at low speed like this chart

 

The velocity input look fine but the output velocity-cmd (derivative from position) is not smooth at low speed. Is this problem come from simple_tp/limit3 component? I look at linuxcnc code note and see cubic interpolator is using. Should i rewrite a cubic interpolator to replace simple_tp/limit3 or try to increase admittance update rate to 1 Khz and skip interpolator?
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