Hi guys.

Just setting up my printer and testing the homing functions of all 3 axis.
Machine is:
1. X and Y belt moves in 1 plane.
2. Z bed lowers and raises from nozzel.

All homing works on all three axis very well, so Y and X home 1st, then Z homes up to the nozzel in the 0 (zero) direction, hits endstop and bumps 5mm as Ive asked in marlin firmware, then re homes slow.
All good..............

BUT,
When I print (after heat up etc and nozzle ready) the machine starts and the Z Bed moves up into the nozzle the WRONG DIRECTION.

Can anyone suggest a #define setting that Im missing in the attached files.??

cheers
Jason

Your looking at your Z axis backwards

For your machine Z min is when it is at the highest position
Z max is when it at the lowest position.

when you click Z- the bed should move up reducing the space between the bed and the hotend.
when you click Z+ the bed should move down away from the hotend.


You need to reconfigure for Z homing towards z min and invert you Z axis.

invert this one: (if it is set to "true" than set it to "false" or vice versa )
#define INVERT_Z_DIR
after that you'll have to invert this one as well: (if it is 1 set it to -1 or vice versa)
#define Z_HOME_DIR

good luck!