Yes, you would need three of these circuits one for each drive, and no the breakout board does not give you this feature.
It's a simple circuit that you can pop on a small piece of veroboard and connect it between the breakout board and Parker stepper drives.
Componants for 4 boards orderered (1 spare) I'll get soldering when they arrive. Not quite sure how to connect up or what my next stage is though.
the only sticking point may be the spindle drive, as you'll need to find out what varies the speed and what enables the spindle. Normally there is a relay (SGR, spindle go relay) that enables the spindle, and an isolated 0-10v board that varies the speed.
I will have a look tommorow to see if I can identify which of these drives I have. Thanks for that. Phil
I have hard a good look at the circuits in the back of the Starmill. I can't be certain but out of the two types of drive on that Denford link you posted, the sd range looks closest.
I have attached a few pics. On one of the motor boards- PKS Digiplan '87.
The Spindle board is- Jay Electrical DC speed control JE124/1 serial 98712407
The tool change psu 122ve.
I have received parts from Maplin to make buffer but haven't got a clue where to connect up. Phil.
have a look at the end of the stepper drive boards and it will state what type they are, probably a cd20 or sd 20. Page 23 of the digiplan drive manual shows the pinout for the end connector, and pins 26 and 28 of row c are the dir and clock positions. You'll need to find the wiring that feeds these signals into the drives and isolate them from the main board, then it's simply a matter of putting the buffer board between the breakout boards output and these points
with the spindle board, do the red orange and brown wires go to a pot for varying the speed.
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