[PCW_MESA]

P1 pin 2 (stp) -> 7I76s TB2 pin 3 (step0+)
P1 pin 3 (dir) -> 7I76s TB2 pin 5 (dir0+)
P1 pin 4 (+5v) -> 7I76s TB2 pin 6 (+5vp)



It just makes a jerk when reversing. It runs smooth in either direction as long as the direction stays the same.



I've tried several different settings and none of them have made any noticeable difference. Here are two sets that I tried:

DIRSETUP = 100
DIRHOLD = 600
STEPLEN = 2000
STEPSPACE = 1000

DIRSETUP = 1000
DIRHOLD = 1000
STEPLEN = 4000
STEPSPACE = 3000

Not sure if if its the cause of your issue but the step/dir wiring is not correct, it should be

P1 pin 2 (stp) -> 7I76s TB2 pin 2 (step0-)
P1 pin 3 (dir) -> 7I76s TB2 pin 4 (dir0-)
P1 pin 4 (+5v) -> 7I76s TB2 pin 6 (+5vp)

This is because the GR214Vs step/dir inputs are active low
wiring the step pin with the wrong polarity can cause violations
of the step/dir hold times