I just updated my ramps 1.4 to 1.6 for my arduino mega 2560 ,because the heatbed N-Mosfet has burned up and everything is working except one thing, i cant figure out why my Z axis dont wanna move up, even if i tell from uart to move u it allways moves in the same direction.
Here is a couple of things i did to debugg the problem.
1) Switched the A4988 stepper driver from Y axis,
result : Didn't change anything the problem persisted in Z axis, so the A4988 is Ok.
2) Switched the ramps 1.6 to the old one (still working but no bed control),
result : Everey axis works as expected.
3) Meassure dir pin in Z-axis stepper motor (with ramps 1.6) ,
result : The value changes from 4.9 to 4.7v .
4) Meassure dir pin in Y-axis stepper motor for comparisson (with ramps 1.6) ,
result : The value changes from 4.9 to 0.1v .
So, the problem relies in the ramps, but i wanna know if anyone had even a similar issue bcz the controller is brand new and everething else it's working fine, its just rare ...
Thanks in advance , and srry for my english.