Z axis crashing into the bed instead of moving away (4 replies)

Hi guys

I'm having a little bit of a problem with my setup, I'm running it on a AzteegX3 with repetier firmware on it. The homing for all the axis goes well, but when it starts printing it moves the z axis into the head each layer instead of moving away from it. Now I have tried inverting and reversing it to get it to work, and it does work, but then the controls on the host for the Z axis are inverted.

so my dilemma now is;
- Host control for the z axis work properly ( press up goes up, down for down) but the bed crashed into head during print instead of moving away from it
- or host control for the z axis are inverted ( press up goes down, down for up) and the print starts good and I will get a good print.

Is there a way I can fix this? the z axis motor is placed on the top of the printer, the printer is like the ultimaker but the z axis stepper motor is placed on the top instead at the bottom. I don't want to rearrange the stepper motor so I am wondering whether there is a way to fix this either in the firmware or in the repetier host software.

thanks!

p.s. I think I originally posted this in the wrong section, so I put it here instead as it is both repetier host and firmware related problem