Originally Posted by
Metalbender
. . .been beating on this for awhile. I enlisted help from a friend here at work. Denny spent a lot of lunch hours tracing and track the pulses. A scope showed that the pulses were at about 6 volts. After 5 frustrating days of dinkin' around Denny decided to put a pot on the step output from the breakout board and by adjusting it up he arrived at 1000 ohms as the ideal resistance. Anything less would make the motors stall or not run at all. There is a very vague reference to this resistor in the pulse wire, in the documents I downloaded from Keling's site, but no base value as a starting point is given. I also see a reference to a resistor in the direction wire also. Again no base starting value is given. You're kind of left on your own to figure it out.
So I ( actually Denny) finally got my motors to move again. Now on to the Mach 3 forum to find out why they move in reverse when running a program only. If jogging or using MDI they move correctly.
This CNC is no longer an obsession . . .it's an incurable disease!!!
Greg