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Hi Andy,

thanks a lot for your response. I will try it and buy the recommended MESA Board.

Yes, you are right, the tacho signal can be connected directly to the DC motor amplifier. I have only one amplifier for the 3 axes. So I can run them only in sequence.

I hope, I will find out how to interpret the inputs (TTL ?) from the Heidenhain EXEs.

Is there any chance to get connected to the LinuxCNC developer in Münster?

Best regards

Hartwig

Firehunter wrote:

Thanks for the replies. I guess updating Linux and LinuxCNC is the only option left.
 

Note that I don't actually expect that to fix this issue. 

Can you attach your HAL files(s)?

github.com/LinuxCNC/linuxcnc/commit/9783...cfdb5ea02cd0336145e6

I don't normally recommend PyVCP as it is not very flexible, but in this case it is probably a good choice.

linuxcnc.org/docs/stable/html/gui/pyvcp.html

The example panel in section 4.1 is very close, you would just swap the bar for a slider, and connect to stepgen.4.velocity-cmd instead of the spindle speed.