Hello.
I have an issue with X & Y movement on a coreXY machine.
I'd previously had no problem with A4988 drivers at the same speed.
I (embarrased) fried my RAMPS board and steppers and replaced them with DRV8825 steppers, set at 1/32 step
If I issue a pronterface 100mm move command, Feedrate at anything over 7500mm/m -it travels fine, but at the end of its travel it makes a nasty kind of 'clunk' and travels on another 2 or 3 mm. Maybe one motor stops and the other does not.
I've swapped the stepper drivers several times with the same effect. I don't think its a dodgy driver. I've tuned and tuned.
I tried to switch it from 1/32 to 1/6 stepping but was not able. Using the jumpers as suggested doesn't give me the correct stepping.
(I had asked in RAMPS about setting 1/16
RAMPS)
Saying that, even 1/8 stepping was giving me the same result
Here's a brief movie
YouTube that doesn't really convey the true nasty crunch of it
If anyone has any suggestions please comment.
Thanks
Alan
