aes92000
Posts: 8
Joined: Sun Jan 01, 2017 10:32 pm

secondary extruder printing (dual extruder) not lowering to probe offset

Thu Aug 19, 2021 5:47 pm

i have ramps 1.4 with Marlin 1.1.0-RCB
Bigtreetech TFT35-E3 V3.0
DIY dual extruder 300x300x350

i can print perfect with primary extruder (left - T0) - exceptional prints every time
when i set profile up for only 'secondary extruder only print' (right - T1) it will not lower to probe offset (M851 Z-3.5) as T0 does. but will extrude and go through motions.

in separate profile i only have the secondary extruder added
all settings use extruder 2 (layer, infill, support, heat/cooling...)

start script
M106 S255
T1 - set tool to use
M140 S[bed0_temperature] ; this sets the bed target to the value configured in Simplify3D
M109 T1 S[extruder1_temperature] ; this waits for the extruder to heat to the value configured in Simplify3D
M190 S[bed0_temperature] ; wait on the bed just to be sure

M280 P0 S160 - deploy probe
G4 P150 - pause
T1 - set tool to use
G28 ; home all axes
M420 S1 - enable leveling
G29 V4 T0 -auto level

any help to fix is much appreciated.

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