63
« on: November 12, 2017, 05:40:58 PM »
So the situation is this: I have a mach 3 running a cnc gantry style and I have added a forth axis (A axis) It has its own power supply and control board.
My spindle runs separately and it is not controlled by mach 3. I turn it on manually. There are no wires running from the inverter vfd that runs the spindle, and control board--none!. So the vfd, spindle electrical cable, and spindle are not wired to the control board that runs a-axis or to the other control board that runs any other stepper motor!. A-axis lathe is run by a stepper driver and stepper motor.
But the following happens: When the spindle is activated by turning on the vfd ---the A-axis rotary starts turning, but it sounds like its grumbling badly as it spins up to rapid. Its not suppose to do anything. If I disconnect the usb cable between the A-axis control board and the computer, and then start the spindle running, then A-axis does nothing. Plug it back in with the spindle already running--and a-axis revs back up, grumbling. Actually its sounds like a growling cat or something tearing itself apart. If I disconnect the energy cable from the spindle motor, a=axis still turns (vfd still turned on).
IF I EXIT MACH 3 ALTOGETHER... AND THEN TURN ON THE VFD, THE A-AXIS still SPINS UP!!
Hitting the emergency switch, stops x-y-z movement, but the *7!@# lathe keeps on turning...(its alive!!)
Hitting the home switch for a-axis does nothing... still keeps turning.
Ok you wizards... where did I f*** up. bob
Guest
Show Posts
