Z-Offset being ignored. Marlin V1, Tronxy P802MA, Melzi.

Hi,

I recently flashed the 'P802MA_8_MarlinV1_Melzi_ADCKey' firmware onto my Tronxy P802MA 3D printer. It has a Melzi 3.0 V3 board.

I then fitted a Tronxy XY-08N Z-probe and connected it to the Z Endswitch slot on the board.

The firmware works and the Z-probe glows red when it is close to the bed after homing and then stops like it's supposed to.

Albeit, the nozzle is a few MM's from the bed every time I home the Z-axis and changing the Z-Offset via the EEPROM and Pronterface software doesn't seem to work.

Does anybody have any advice please?

Thanks, Bill.

My 3D Printer stops nozzle at 10.5mm above the bed - I lower 10.5mm it to set nozzle height = zero. Z-Offset -0.5 plus Z_Clearance 10mm = 10.5mm
Let's see if this will help

Configuration.h
#define Z_PROBE_OFFSET_FROM_EXTRUDER -0.5 // Z offset: -below +above [the nozzle]

#define Z_CLEARANCE_DEPLOY_PROBE 10 // Z Clearance for Deploy/Stow
#define Z_CLEARANCE_BETWEEN_PROBES 5 // Z Clearance between probe points

Configuration_adv.h
#define ADVANCED_PAUSE_FEATURE
... #define PAUSE_PARK_Z_ADD 10 // Z addition of hotend (lift)

Hi,

Thanks for your response Clif.

I will try this when I get home from work and will report back with the result.

Thanks, Bill.

Quote
Roberts_Clif
My 3D Printer stops nozzle at 10.5mm above the bed - I lower 10.5mm it to set nozzle height = zero. Z-Offset -0.5 plus Z_Clearance 10mm = 10.5mm
Let's see if this will help

Configuration.h
#define Z_PROBE_OFFSET_FROM_EXTRUDER -0.5 // Z offset: -below +above [the nozzle]

#define Z_CLEARANCE_DEPLOY_PROBE 10 // Z Clearance for Deploy/Stow
#define Z_CLEARANCE_BETWEEN_PROBES 5 // Z Clearance between probe points

Configuration_adv.h
#define ADVANCED_PAUSE_FEATURE
... #define PAUSE_PARK_Z_ADD 10 // Z addition of hotend (lift)