depronman
15-11-2020, 10:33 PM
Hi
looking for some ideas on the strange behaviour of my A axis setup
I've justed added the driver, a DM542A from Longs motors
Set up Linuxcnc and mapped a couple of spare output pins on parport 0 to the Step and Dir on the stepper driver
Also added a 5volt feed to the stepper driver
The green LED is lit and the red LED is not lit
I can jog the A axis through gmoccapy, but its anything but smooth and its faster moving in one direction than it is in the other
I did a quick and dirty test and it appears that one rev of the motor clockwise is 50 units on the display, but 25 units the other way completes the 1 rev anti clockwise
Does it matter that the 5 volts is not from the BOB, its 4.6 volts, so I though this would be fine, but can run a wire from the BOB to the stepper driver.
I may well have something wrong in Linuxcnc, but why would it jog 2x as far in one direction than it does in the other
Any help much appreciated
Cheers,
Paul
looking for some ideas on the strange behaviour of my A axis setup
I've justed added the driver, a DM542A from Longs motors
Set up Linuxcnc and mapped a couple of spare output pins on parport 0 to the Step and Dir on the stepper driver
Also added a 5volt feed to the stepper driver
The green LED is lit and the red LED is not lit
I can jog the A axis through gmoccapy, but its anything but smooth and its faster moving in one direction than it is in the other
I did a quick and dirty test and it appears that one rev of the motor clockwise is 50 units on the display, but 25 units the other way completes the 1 rev anti clockwise
Does it matter that the 5 volts is not from the BOB, its 4.6 volts, so I though this would be fine, but can run a wire from the BOB to the stepper driver.
I may well have something wrong in Linuxcnc, but why would it jog 2x as far in one direction than it does in the other
Any help much appreciated
Cheers,
Paul