Starmill

[i2i]

Ok. The spindle is for the spindle on/off and speed yes? breakout for going between computer input and stepper drives? what is buffer for? Phil.

Yes the spindle board controls the on/off of the motor and the varaible speed. Most dc spindle drives use a 0-10v signal to control the speed and a board like the v3 by diycnc fits the bill. The buffer is used to convert the 5v control logic of the computer to the 12v control logic of the parker stepper drives.

[Phil Gravett]

Thanks for that attachment. I assume I would need 3 of these. One for each drive. I did actually do a search for buffer, 12v/5v converter and kept coming back to Diycnc OPPV2 which seems to provide control of spindle and 12v for drives.
http://www.diycnc.co.uk/html/oppb.html Am I barking up wrong tree or just barking. Phil.