I have been looking, as have others according to my searches, for the spec sheet that you mention above for the UltiStepper Drivers; in order to find this pin that you measure voltage from and haven't had any luck.
Any suggestions on where to look? The Ulti wiki page only has a CAD drawing and no info.
Also, when you say the "driver board" will blow, are you referring to the UltiStepper Driver itself (I think it is A4988 Carrier board) ? So basically you will kill the UltiStepper, not the main electronics board that the UltiStepper plugs into?
Thanks for the help.
you won't blow your stepper motor if it goes wrong you'll blow the driver board
You can look up the spec sheet for the driver and it shows a pin that you can measure a voltage from that is proportional to the current. It's quite hard to get to though.
Easier to follow the wiki and adjust in very small increments going by sound. The stepper motor growls when too high and misses steps when it's too low.
Important not to turn it up too high. The driver board will blow very quickly, believe me I know :-|.
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