I have built my own printer and extruder and everything works with the ramps 1.4 board and A4988 drivers when I put all the jumpers in for 1/16 micro stepping
when I take all the jumpers out for one driver and try to get the stepper to operate in full step mode: it will turn in one direction but not the other
when I try to get it to run in reverse it just sqeals and vibrates
seems to be putting out lots of torque in the direction that actually turns
anybody ever encounter this problem?
is it a driver problem or maybe jumpers?
I was going to try a new driver to see if that works but thought I'd post first
any suggestions appreciated...
cheers
Ian