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PROBLEM SOLVED

It turns out that pin 48 on my Arduino board had failed. It was reading high and not changing. Pin 48 controls the Z direction.

1 new Arduino and the problem has now disappeared.

Thank you for your help Eaglezsoar!

Tried swapping them round and it hasn't solved my problem. I swapped Z and Y. Y still runs as it should. Z does not.

On the Manual Control of the Repetier Software if I click -Z all of the cheapskates move down and so the effector platform moves down in Z. If I click +Z the X and Y cheapskates move up and the Z moves down. The Z cheapskate only moves in one direction. If I issue the G28 code then X and Y head up ...

This is the firmware that is currently on my board

I have tired that. It just reversed my problem. When I asked the z-axis to move up, all the cheapskates moved up. When I asked the z-axis to move down, X and Y moved down but Z moved up.

I have built the Rostock Max kit which came with all of the electronics. The board I have is the RAMPS 1.4 and Arduino. I am using the Repetier firmware and I have configured it so that everything appears to be working correctly apart from one thing. When I request a movement down in the z axis all ...