The PM has a tachometer, and you can link up the 0-10V adapter board for the Acorn connection in such a way that the tachometer is not disabled. I wonder if there is a way to feed back the signal from teh mill's built-in tachometer to the Acorn. That would be the most straightforward way, if doablemartyscncgarage wrote: ↑Thu Feb 25, 2021 12:58 pm Real time feedback requires an encoder to be mounted at 1:1 to the spindle with timing pulleys and belt. Reach out to Franco and see if he'll print and sell you a bracket. He is a member on this forum
I have written Franco, hope to hear back. Thanks for the suggestion.
I'll say it again, you must use signal isolation between Acorn and your spindle drive. You'd better ask Precision Matthews if that board provides signal isolation for the 0-10vdc analog input.
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I called PM to ask about the signal isolation. The gentleman I talked passed my question on to the factory and I got a reply the next day, stating that "both the adapter and the control board are isolated." I have made the wiring, but am not able to to set the RPMs the right way. Used the steps you describe in your video : 300RPM max, and ran the spindlebenchtest.cnc, but when I command 500 rpm in Acorn I get 8xx rpms on the spindle tachometer. Will rerun the benchtest hoping it will reset it.