Z Bed moves up into nozzel when printing, but homes properly (1 reply)

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