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Initial tool change unloads filament

Created my first test and created the gcode for Mk3 for my Ender 3 Pro using PrusaSlicer. When the time comes for the first tool change, it unloads the filament for T0 and does not try to load. I see the bed hit the y axis switch to select the tool, which works, and then only presses once for a period of time which unloads the filament.

It has the line that says "If this is the first load, then don't unload", but I don't think it is working. I feel like I'm so close.

Any help is appreciated.

⬇️ Tool Change gcode listed below. ⬇️

; Auto generated 3D Chameleon Mk4 Mode 3 Tool Change GCode for PrusaSlicer

; - 3D Chameleon Mk4 Tool T{next_extruder} -

;begin switch from extruder {previous_extruder} to extruder #{next_extruder}

M117 Unloading Tool T[previous_extruder]

M83 ; turn relative distances for the extruder

; unload extruder {previous_extruder}

G92 E0

; go to holding position to unload the stock extruder

G0 Y195 F2000 ; <<----- EDIT THIS LINE TO SET THE INITIAL LOCATION OF THE BUTTON

; if this is the first load, then don't unload

G91 ; move to relative mode

M83

; load extruder #{next_extruder}

M117 Loading Tool T{next_extruder}

{if previous_extruder>-1}

; back out the filament for cutting

G0 E-20 F500 ; retract a bit, adjust this to tune waste

; <<<< insert mechanical cutter code here! >>>>

;<<< Start Of Tip Shaping- Remove If No Cutter! >>>

M109 R180; cool down to prevent swelling

M302 S0 ; enable cold extrusion

M106 S255

G0 E20 F1500 ;

G0 E-5 F500 ;

M109 R165; cool down to prevent swelling

G0 E5 F1500 ;

G0 E-1 F500 ;

M109 R155; cool down to prevent swelling

G0 E1 F1500 ;

G0 E-25 F500 ;

M109 R150; cool down to prevent swelling

G0 E24 F1500 ; last tip dip with cold tip

G0 E-24 ; last tip dip with cold tip

M109 R180; ok... go back up in temp so we can move the extruder

G0 E-80 F500 ; back out of the extruder

G92 E0

M104 S[temperature];

;<<< End Of Tip Shaping >>>

; we skipped to here if it was extruder -1

{endif}

{if previous_extruder>-1}

; retract it back out of the extruder

G92 E0

G0 E-100 F2000

G92 E0

G0 E-100 F2000

G92 E0

G0 E-100 F2000

G92 E0

G0 E-100 F2000

G92 E0

G0 E-100 F2000

G92 E0

G0 E-8 F2000

G92 E0

G0 E-30 F2000 ; <<<---- if mechanical cutter, change to a positive value of at least 5mm

G92 E0

; ok - out of extruder - press button to remove it all the way

G91 ; move to relative mode

M82

; we skipped to here if it was extruder -1

{endif}

; press the button to select the new extruder

G0 Y3 F2000

{if next_extruder==0}

G4 P500 ; dwell for .5 seconds - adjust this to match your machines single pulse time

{endif}

{if next_extruder==1}

G4 P1000 ; dwell for 1.0 seconds - adjust this to match your machines two pulse time

{endif}

{if next_extruder==2}

G4 P1500 ; dwell for 1.5 seconds - adjust this to match your machines three pulse time

{endif}

{if next_extruder==3}

G4 P2000 ; dwell for 2.0 seconds - adjust this to match your machines four pulse time

{endif}

G0 Y-3

G4 P2000 ; wait for cutter to work

; ok command selected - back out filament if needed after cut

{if previous_extruder>-1}

G0 Y3 F2000 ;

G4 P7000 ;

G0 Y-3;

G4 P400

{endif}

G0 Y3 F2000 ;

G4 P7000 ;

G0 E25 F1500; <<<--- adjust this E value to tune extruder loading

G0 Y-3;

G4 P400

G92 E0

G90 ; move back to absolute mode

M83 ; but make sure the extruder stays in relative

; reload filament all the way into extruder

G92 E0

G0 E100 F2000

G92 E0

G0 E100 F2000

G92 E0

G0 E100 F2000

G92 E0

G0 E100 F2000

G92 E0

G0 E100 F2000

G92 E0

G0 E-17 F2000 ; <<<<<----------- EDIT THIS DISTANCE TO FINE TUNE THE FILAMENT LOADING TO STOP BLOBBING OR UNDEREXTRUSION

G92 E0

M83 ; turn relative distances for the extruder

M302 S180 ; prevent cold extrusion

M117 3D Chameleon Tool T{next_extruder}

24 comments

24 Comments

Donnie Gates

Apr 30

Has anyone set up the 3D Chamelon on an Ender 5 S1 if so I need help with g code and what did if anything you do for filament cutter if any one can help with g code would appreciate it Im new to 3d printing and need all the help I can get

las_vegas

Apr 30

Replying to

I've been looking at OrcaSlicer, but can't figure out where to put the Tool Change code.

373224

Apr 30

Replying to

Next to the printer selection box is an icon, click that and it’ll open up a dialog window.

Make sure ‘Advanced’ is enabled and then just head on over to the Machine G-Code tab.

Scroll down and you should see Filament Change G-Code.

It should go in there. Make sure to save the profile when you’re done adding the new code.

Bill

Apr 30

Replying to

It's easy... just Edit the printer settings, make sure "Advanced" is turned on and choose Machine G-Code... scroll down to "Change filament G-Code" and paste it in there.

Bill

Thomas Randolph

Apr 28

I am now successful getting the filament to my extruder motor. I am, however, still having issues getting my stock extruder to grab and pull the filament to my hot end. Would upgrading the motor help? I even tried swapping out for an all-metal extruder but still will not grab. I'm almost at a loss.

Thomas Randolph

Apr 28

Replying to

Thanks. I'll give it a try

Thomas Randolph

Apr 28

Replying to

These 2 sections exist form the gcode generator. I don't have a cutter so does that affect it? It also looks like the code for the extruder is set to run.

Bill

Apr 28

Replying to

Those lines aren't about the cutter... the first block does the unload of the previous filament and the second block loads the filament. It's the one that also drives the extruder forward while the 3DChameleon is pushing the filament. The P7000 line is the one you need to increase to make sure it overlaps with the extruder's 25mm movement.

Bill

Apr 27

My guess is you have not home the 3DChameleon before the print. You can do it manually with a 7 pulse press, or add the code to the start gcode. Also, in the end gcode, you'll want to unload the last used tool with a 6 pulse command.

Take a look at our Creality K1 sample code for a great example of this: https://www.printables.com/model/653583-3dchameleon-mk3-installation-for-the-creality-k1-a

Bill

Thomas Randolph

Apr 27

Replying to

So I tried changing the mode with 10 pulses. The 2 vibration setting acts very weird as it seems to try to unload the filament then reload it all at once. Also, there is a 3 vibration option not sure what that does, but it seems to act like the 1 vibration setting. Am I missing something?

las_vegas

Apr 27

Replying to

The '2 vibration' setting is Mode 2. You want Mode 3 (3 vibrations) for your setup.

Thomas Randolph

Apr 27

Replying to

Ok. Thanks. I was surprised when I felt it as I couldn't find a reference to it.The MK3 info says the pulses are the same from MK2 and it only list 1 and 2 vibrations.