I think my issue is coming from this part of my tool change code ; press the button to select the new extruder G0 X3 Y3 F2000 ; press the button {if next_extruder==0} G4 P460 ; dwell for .5 seconds - adjust this to match your machines single pulse time {endif} {if next_extruder==1} G4 P920 ; dwell for 1.0 seconds - adjust this to match your machines two pulse time {endif} {if next_extruder==2} G4 P1380 ; dwell for 1.5 seconds - adjust this to match your machines three pulse time {endif} {if next_extruder==3} G4 P1840 ; dwell for 2.0 seconds - adjust this to match your machines four pulse time {endif} G0 X-3 Y-3 ; back off the button G4 S15; wait for it to happen ; adjust this time to match the actual tool change time - subtract the time it takes to load for the last 1" into the extruder G0 E75 F2000 ;      << -------   ADJUST THE E50 VALUE TO STOP IT RIGHT AFTER IT LOADS INTO THE STOCK EXTRUDER (50mm is the default) ;                ADJUST THE F1500 TO MATCH THE SPEED OF THE FILAMENT FROM THE 3D CHAMELEON ;                NOTE: This defaults should work, but you can always tune them to be perfect. G4 P1500 ;          This is just a half second extra reloading time... just to make sure G92 E0 G90 ; move back to absolute mode M83 ; but make sure the extruder stays in relative Any way I can have the chameleon keep pushing the filament a little longer so it makes it to the extruder?

Thanks for the quick response! I should have added a few details first post ;P Confirmed Mode 2 currently Cut down PTFE tubing to appropriate lenght for my setup I use a direct drive hemera extruder but in this case simply see it as a stock extruder, Chameleon splitter feeds into it I've set the extruder to nozzle lenght to 30mm in gcode generator. Trigger switch activating correctly by printer with test prints so position is correct. I am not looking for direct drive mode for chameleon as my process depends on my hemera extruder. To clarify, my problem is that upon loading filament during a tool change from chameleon to my extruder, it never pushes enough filament to reach the extruder. Is the only logical solution to use mode 3 and program a lenght of time for the bed to trigger chameleon switch for duration of filament movement to extruder? or different approach possible in mode 2?