Unexpected & unnecessary filament change
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Unexpected & unnecessary filament change  

New Member
Unexpected & unnecessary filament change

Hello all,

  I gave printer a break recently for about a month, and when I got back to printing again, something odd is happening. Everything I slice (PrusaSlicer 2.3.1 on macOS 11) has a filament change at least at the beginning of the print.

  For example, I just sliced and printed a simple string test -- 2 columns near each other. The printer (Ender5 Pro) warmed up, probed the BLTouch as normal, and printed the initial line down the left hand side of the board. All normal. Then is stopped, moved the head to the front right corners, and performed a filament change operation.

The last 4 things that I have all printed, also all stopped for a filament change in the middle.

Obviously, I changed a setting somewhere in PrusaSlicer before I was away for a month, but for the life of me I cannot find it. 

Any and all help is appreciated.

Posted : 30/05/2021 3:58 pm
New Member
Topic starter answered:
RE: Unexpected & unnecessary filament change

I suppose I should clarify that I do not find M600 in any of the custom gcode, nor to any of the settings that come up when I search for "color", or "change", or "skirt" seem like they are the culprit.

I searched for "skirt" because the M600 is consistently showing up in the GCode just before the skirt is started.

Posted : 30/05/2021 4:29 pm
Estimable Member
RE: Unexpected & unnecessary filament change

Because it happened to me... Maybe you by mistake clicked on "+" symbol on vertical scale when you examined layers in Prusa Slicer? That "+" injects Change filament color command into exported G-code.

Mini+ with Bondtech upgrade & modified firmware...
Posted : 30/05/2021 5:50 pm
Illustrious Member
RE: Unexpected & unnecessary filament change

If it's in your settings, it should be present in a saved project 3MF file. Save your current parts and settings in a  3MF project file, zip it up, and attach it to a reply here so we can see your part & settings and take a look. It almost sounds like something is amiss in your start gcode, but a quick view of your settings should clarify. It is odd that it gets through the start gcode printing the prime like OK.

Are you using OctoPrint or anything else between the gcode and printer? Are you printing from SD card?

My notes and disclaimers on 3D printing and miscellaneous other tech projects
He is intelligent, but not experienced. His pattern indicates two dimensional thinking. -- Spock in Star Trek: The Wrath of Khan...
Posted : 30/05/2021 6:57 pm