Dual Extruder Single nozzle tool change help

[wbarber69]

I have successfully added a second extruder to my cr-10. I have all the settings working as it should apart from one issue. I have my tool change script lift the nozzle, retract the currently used filament and then extrude the next color the same distance before returning to the part and doing a prime pillar. the problem is that when the new filament gets pushed back in the pressure from it causes a tiny ball of filament to get pushed out the nozzle. then that blob is lowered back down to the part and then the nozzle moves to the prime pillar. what i want is for the nozzle to lift, change filaments then move to the prime pillar before lowering so that the blobs get dumped in the prime pillar instead of all over my model. is there some special s3d script im supposed to put somewhere to make s3d go to the prime pillar before lowering instead of having it drop to the part first?

my tool change script:

Code: Select all

T[old_tool]
G91; relative Positioning
G1 E-5 F6000 ; retract the filament from melting zone
G1 Z5
G1 E3
G4 S1 ;wait for 1 second to reduce the filament stringing
G1 E-88 F4000 ; retract the filament

T[new_tool]
G1 E80 Z-3 F1000 ;extrude the new selected filament to the nozzle
G1 E8 Z-2 F1800 ;extrude the new selected filament to the nozzl
G90;absolute positioning

[cmccr88]

I have added the following into the Tool Change Script to move to the next location "G1 X[next_position_x] Y[next_position_y] F[travel_speed] ;move to next printing location".

Code: Select all

T[old_tool]
G1 X[next_position_x] Y[next_position_y] F[travel_speed] ;move to next printing location
G91; relative Positioning
G1 E-5 F6000 ; retract the filament from melting zone
G1 Z5
G1 E3
G4 S1 ;wait for 1 second to reduce the filament stringing
G1 E-88 F4000 ; retract the filament

T[new_tool]
G1 E80 Z-3 F1000 ;extrude the new selected filament to the nozzle
G1 E8 Z-2 F1800 ;extrude the new selected filament to the nozzl
G90;absolute positioning

[wbarber69]

Yes, after weeks of trying to get an answer I found one similar to this on a forum that people actually participate in. But using the placeholders to move before tool change had other undesired effects. I ended up dumping any tool change scripts for a post processor called filaswitch and I’ve been more than happy with the results. S3d is probably 2-3 years away from a decent settings menu that can accommodate a dual extruder si flex nozzle profile, and their prime pillar is only slightly less than useless. Try out filaswitch and never look back.