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.
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.
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+] [MK3S+BEAR]
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?
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
RE: Unexpected & unnecessary filament change
Hi All,
This is also happening to me... I am not sure if there was ever an outcome to this original post.. ?
Initially I thought it was a setting in Prusaslicer, but I then sliced it with Simplify3D & it also invoked an unexpected filament change approx 1/2->2/3rds into the print. So I went back a step where I creating the STL out of Fusion 360, and I still I couldn't find anything that was causing it. If there is a known fix, I would be happy to be enlightened. Thanks...
RE: Unexpected & unnecessary filament change
Please disregard.. I did some more digging & found it was a filament sensor issue... I have received a dodgy roll of PLA that is causing the issue.... All good thanks..
RE: Unexpected & unnecessary filament change
I have this issue at the start of every single extruder multicolour print I do. It's always just after the purge line, so once the gcode is created, I comment it out as below.
; Don't change E values below. Excessive value can damage the printer. M907 E430 ; set extruder motor current G21 ; set units to millimeters G90 ; use absolute coordinates M83 ; use relative distances for extrusion ;M600 T0 M104 S230 ; set temperature M900 K0.08 ; Filament gcode LA 1.5 M900 K45 ; Filament gcode LA 1.0
For the life of me I can't figure out where it's coming from. Also when I was in there, I notice the same section is repeated 7 times at the beginning.
; external perimeters extrusion width = 0.60mm ; perimeters extrusion width = 0.60mm ; infill extrusion width = 0.60mm ; solid infill extrusion width = 0.60mm ; top infill extrusion width = 0.40mm ; support material extrusion width = 0.35mm ; first layer extrusion width = 0.40mm ; external perimeters extrusion width = 0.60mm ; perimeters extrusion width = 0.60mm ; infill extrusion width = 0.60mm ; solid infill extrusion width = 0.60mm ; top infill extrusion width = 0.40mm ; support material extrusion width = 0.35mm ; first layer extrusion width = 0.40mm ; external perimeters extrusion width = 0.60mm ; perimeters extrusion width = 0.60mm ; infill extrusion width = 0.40mm ; solid infill extrusion width = 0.40mm ; top infill extrusion width = 0.40mm ; support material extrusion width = 0.35mm ; first layer extrusion width = 0.40mm ; external perimeters extrusion width = 0.60mm ; perimeters extrusion width = 0.60mm ; infill extrusion width = 0.60mm ; solid infill extrusion width = 0.60mm ; top infill extrusion width = 0.40mm ; support material extrusion width = 0.35mm ; first layer extrusion width = 0.40mm ; external perimeters extrusion width = 0.60mm ; perimeters extrusion width = 0.60mm ; infill extrusion width = 0.60mm ; solid infill extrusion width = 0.60mm ; top infill extrusion width = 0.40mm ; support material extrusion width = 0.35mm ; first layer extrusion width = 0.40mm ; external perimeters extrusion width = 0.60mm ; perimeters extrusion width = 0.60mm ; infill extrusion width = 0.60mm ; solid infill extrusion width = 0.60mm ; top infill extrusion width = 0.40mm ; support material extrusion width = 0.35mm ; first layer extrusion width = 0.40mm ; external perimeters extrusion width = 0.60mm ; perimeters extrusion width = 0.60mm ; infill extrusion width = 0.60mm ; solid infill extrusion width = 0.60mm ; top infill extrusion width = 0.40mm ; support material extrusion width = 0.35mm ; first layer extrusion width = 0.40mm
Hope this helps identify where this issue is coming from.