@Icthus:
…...............I'm got movement starting to happen on the printer but it looks like the z-axis keep skipping steps and I've just upped the mA to 1800!
Some possibilities. Something binding or sticking? Z speed set too high or more likely acceleration set too high? Incorrect steps per mm? Not familiar with that printer so can you explain the configuration of the Z axis (number and type of lead screw, motor arrangement etc).