Z-axis doesn't work on RAMPS

Just got over my problem with the y-axis, bad driver. Using the two drivers i have left to test everything out and i cant get the z-axis to work with pronter face, the driver works fine with the other axis. ANy ideas?

UPDATE, the motor has torque( it gets power and is hard to spin) but doesn't spin when it should . Any thing I should be testing? I.e, solder jobs?

I would check the wiring to make sure there isn't a problem there (loose headers, broken wires etc...) . Also, do you have the motors wired in series (both sets of the wires soldered together going to a single header) or in parallel (each motor separately plugged into the electronics)?

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look at the end stops as well. make sure that the pull ups are enabled in firmware if using mechanical switches.
also make sure to use correct side of contact switch some setups are normall open, some are normally closed.

it would be easier to help troubleshoot if we know what printer model or variant you use as well.

read here on more info for mechanical switches, and for motor setup

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