1 Topic by dominodrake

  • dominodrake
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Topic: Daul Extruder is Switching heads by itself

I am using Cura to slice the .stl file to the gcode file.  I have a Prusa i3 pro C duall extruder, and I'm using OctoPi to control the printer.  This problem has happened three times now.  I start working on the dual extruder.  I slice a file for dual extrusion and load it to Octopi.  It starts the print correctly printing with Tool 0 as extruder 1, prints the brim and the first layer for extruder 1, stops then switches to Tool 1 as extruder 2, and prints the first layer for extruder 2.  I have to stop it as this point because I don't have the offset correct yet.  Then I slice the .stl file again and reprint.  I can do that 2 only a few times before extruder 1 switches to Tool 1 by itself.  Problem: Cura or Octopi is switching Extruder 1 to Tool 1, not Tool 0. 

Can someone help me figure out where this switch is happening at?  Is it in the .gcode that extruder 1 is being switched to Tool 1?

2 Reply by carl_m1968

  • carl_m1968
  • carl_m1968
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Re: Daul Extruder is Switching heads by itself

You really should just think of the extruders as 0 and 1 as well. I always tell people when looking for bugs or issues think like the machine and it's programming.

Unless you can attach the gcode here as well as your settings in both Octopi and cura it will be pretty hard for us to diagnose your problem.

The gcode is what switches the extruders. The Octopi is simply running the gcode as it sees it.

Printing since 2009 and still love it!
Anycubic 4MAX best $225 ever invested.
Voxelabs Proxima SLA. 6 inch 2k Mono LCD.
Anycubic Predator, massive Delta machine. 450 x 370 print envelope.

3 Reply by dominodrake

  • dominodrake
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Re: Daul Extruder is Switching heads by itself

Np, Extruder 0 - Tool 0, Extruder 1 - Tool 1


From .gcode:
;FLAVOR:RepRap
;TIME:1536
;Filament used: 0.45632m
;Layer height: 0.175
;Generated with Cura_SteamEngine 2.6.2
M190 S60
M104 S210
M104 T1 S210
M109 S210
M109 T1 S210
G28 ;Home
G1 Z15.0 F6000 ;Move the platform down 15mm
;Prime the extruder
G92 E0
G1 F200 E3
G92 E0
;LAYER_COUNT:7
;LAYER:0
M107
M104 T1 S175
G0 F3600 X80.027 Y81.608 Z0.1
;TYPE:SKIRT
G1 F1050 X81.608 Y80.027 E0.03904
G1 X82.06 Y79.62 E0.04966
........

So what this says is for the machine to use T1 instead of T0. 

If I slice the file, how do I keep it to use T0?

4 Reply by carl_m1968

  • carl_m1968
  • carl_m1968
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Re: Daul Extruder is Switching heads by itself

In addition to tool selection for slicing each section, is the temp set for the correct tool in each section as well? In Cura if memory serves there are two places that this stuff has to be set in and they both have to jive. The machine settings and slicer settings must match for tool Temps and such.

Printing since 2009 and still love it!
Anycubic 4MAX best $225 ever invested.
Voxelabs Proxima SLA. 6 inch 2k Mono LCD.
Anycubic Predator, massive Delta machine. 450 x 370 print envelope.