23490
« on: March 27, 2008, 04:20:42 PM »
OK that seems to be what Bec has set in Mach. I can think of only two or three reasons there are problems.
1. Bec has not got the motors wired to the correct pins as stated above.
2. The port cable that is being used is a crossover cable and as such is putting the signals from Mach to the wrong pins on your board.
3. Your board is not functioning correctly.
What I would suggest is that the wiring is gone over again to make sure it is correct, we all know how easy it is to get things mixed up especially when things are new to us.
If the wiring is correct then I would use an ohm meter to check that pin 1 at one end of the cable goes to pin 1 t the other, same for pin 2, 3 etc etc.
If that is correct then hopefully Bec can get a scope and see where the signal is failing, a voltmeter could also be used if a scope is not available. First thing to do is unplug the cable from the board and connect the scope or meter to Pin3 and ground and jog the axis one way then the other and check that the pin goes from 5V to 0v depending on direction. Next do the same with pins 5 and 7. The step pins are next, with a scope its easy enough but if using a voltmeter set it to mV range and connect between pin 2 and ground and again jog the axis. What voltage you will see will depend on the pulserate set but all that is really needed is for a voltage to show, repeat for the other Step pins (4 and 6)
If that all works fine then I can only suspect that there is some problem with the board itself altough this seems unlikely as it seems to work in MaxCL mode.
Hood