Hey TOTALLYRC,
I haven't posted anymore because it didn't look like this thread had any interest. I had to "map out" the BOB on my own as no info is to be had. I found pp pins 2-9 as step/direction for 4 axises, and 14,16 &17 are the relay outputs that are seen at top of BOB. PP pin 1 is in the db25 header on the BOB and soldered on backside of BOB, but I looked at the BOB with a bright light, through the BOB from both sides, and there are no traces at db25 pin 1 on the BOB. It is a unused and therefore Wasted possible output pin from Mach 3.
I soldered a wire on pin 1 under BOB and used that as the pwm output from Mach 3 to the Super PID. The Super PID instructions say it can take input directly from the pp because it has optoisolation separating the control and mains. I now have Mach 3 totally controlling the Rotozip like a "real" machine tool spindle, M3 or M4 turns it on, M5 turns it off, add in an S(insert rpm here) and the Super PID & Rotozip deliver commanded rpm.
I'm a pretty happy camper,
, I do have one small problem to work out though. If I turn the zip on manually with the toggle and use the pot for speed control I get 5,000 - 30,020 or sometimes a little more (30,200). But when under Mach 3 speed control the zip maxes out at 24,200 no matter what numbers I put in the spindle pulley config of Mach 3.
I started with 0 and 30,000 , tried dozens of other upper end numbers and never got above 24,200 rpm on the rotozip. I finally setteled for now on 0 and 23,350 because that gives the best correlation between commanded and actual rpm, pretty good actually right up to 24,000 rpm but any commanded rpm above only gets 24,200.
I more than likely won't want to run my spindle above 24,200 anyhow so I don't really see it as big deal because Mach3 speed control works great from 5,000 to 24,000 rpm. I have just sent an email to Super PID tech support explaining my set up and results. Time will tell if they have any idea what's going on.
I thought this post might be helpful to someone else as I SURLEY can't be the only one who ever got one of these oddball BOB's. Maybe I'm just the only one stubborn enough,(dumb) to find a way to use it.
Rick