Running stable ver of mach3. c11g bob ver8.2/ gecko 203v drivers. 6515 keling pS and keling motors. Parallel port is a pci card just to make sure of one problem. Cable is new. Everything has been checked many times. Ive tried all the settings from the msg board here and nothing is working.
Read msgs about jerky/slipping motors but couldnt find anything like this.
Problem:
Motors are jerky in tuning no matter what setting or speed. 1/2 pulse 1-5 step pulse port pins etc. No enables or e-stop.. everything is off except motor specs.
There was a couple of times that in tuning, the motor actually worked and i had a chance to tweak it (vel/speed). Once i tweaked it and "saved" and I IMMEDIATLY used the arrow keys to manually move the motor again, but it went back to jerky and slipping instead of a smooth rotation.
When I went to ALT6 setting and "set steps per unit" to like 20 as an example. it remembered the setting in tuning and rotated smoothly every time, no matter what number i inputed.
PC is winxp sp2 and a clean install with nothing but internet and mach3.
I dont have any more ideas as im not an electronics expert.