Random Filament Changes in Prussa Slicer 2.7.1
I was printing a model with g-gode produced by Prussa Slicer 2.7.1 and at 3 points during the print it stopped for a filament change. I had not inserted any filament changes when slicing the model and it didn't show a time to a filament change on the screen during print.
Has anyone else run into this and is there a work around or fix?
Thanks - Hank
RE: Random Filament Changes in Prussa Slicer 2.7.1
Hi Hank,
the filament sensor can be sensitive, especially with a well used printer.
If the filament senses an issue with the filament going through the extruder, it will go into colourchange, like manouvres. which can be a pain...
if this is an original Mk3, possible causes include Dust in the filament sensor, shiny filament, transparent filament certain colour filaments, particularly green.
If this is a Mk3S or Mk3S+
possible causes, include
filament shreds in the Adapter Printer (the Piece with the hole for the ball bearing, Orange in the picture), Poorly adjusted or loose filament sensor,
Worn adapter printer (the hole where the orange filament is passing through the extruder), undersize filament, damaged filament caused by the bondtech gears chewing the filament, soft filament such as TPU, overtight bondtech idler screw.
I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK
RE: Random Filament Changes in Prussa Slicer 2.7.1
Hi Joan - Thanks for the reply. I have an MK3S that was upgraded to S+ and I was printing black PLA filament when I had the multiple print interruptions. The filament was cheap and so may have had more variation in diameter than it should. I changed to a higher quality white PLA filament for a subsequent part, and it still had the problem though only once during the print. I will try using compressed air to clean out the sensor like you suggested and see if that helps. I'll make sure the socket is secure on the filament sensor at the same time.
Thanks Again - Hank