Originally Posted by
b5n7i2o5
I don't think you are understanding what I am getting at. I know how to control the spindle I know what pins etc. I will be using either a computer or my own micrprocessor designed circuit to control that aspect of spindle rotation cw/ccw and speed. What I m searching for is what board the dyna 4400 had that delivered the necessary -15v and +15v supply voltages for the Servo Dynamics drive. Without this board I will have to build an opamp (inverting) power supply to give me the negative voltage that I need also Servo dynamics said they wanted at 2 amp supply with on these 2 inputs. So if I knew what board this was and if we still had it I was hoping to save time and effort by possibly being able to reuse it. So does anybody know what board supplies this -15v and +15v power to the drive?
123CNC is right. The SD 3060 provides it's own 15v power supply. It's pins 10-12 of connector J1. See the diagrams I posted in post #37, they are scans of the SD3060 factory manual. If you don't have +/- 15v at those pins, then the internal 15v power supply is bad. If you take the SD3060's cover off and look behind the large circuit board, you will see, from left to right (with the terminal strip at the left) the 15v PS, a large capacitor, the rectifier diodes and regen circuit. I actually have pictures of all this, just not right here. I'll try to post them later tonight.
Also, I don't think you actually need 15v, 10v might do. You don't really need to build your own board, just get a breakout board that has a 0-10v signal out, and use relays to flop voltage if you need a reversing spindle. Unless you like making work for yourself. Also you should really check the 2400 build thread I linked to, they have reverse engineered some pinouts from an AHHA....
@123CNC, thanks for the repair recommendation. I'm actually re-building the rectifier circuit with all new components, hopefully that will do the trick.
Chris.
List of parts sources for CNC builders - http://www.CNCsources.net
Dyna Mechtronics 4400C Conversion - CNC bed mill w/toolchanger to Mach3 conversion - http://www.cnczone.com/forums/showthread.php?t=50787