Hey friends, I have a question. When you’re doing a multicolor print and you have two slots set to auto refill, what happens when the first slot runs out?
How will it swap filaments if it’s unable to retract the little bit of filament left in the tube since it’s left the AMS motor? Would it not just get jammed?
It pushes in the new filament then purges the old one.
Hmm wouldn’t get stuck? During a multicolor print, if it needs to retract that piece in the tube, it won’t be able to, since it’s no longer in the AMS motor, so there would be a jam in hub since the filament couldn’t be fully retracted.
Printer cuts the filament at the extruder entry point, the rest of the filament is back to the spool. Then it loads the new filament and purges the rest of the first filament from the extruder.
When the first spool is almost empty, the sensor at the AMS lite tells the printer “no filament here, the sensor at the print head says “well I still have some”.
This puts the printer into a new state, “burn off the filament in the PTFE tube”.
It pulls the remaining filament into the hot end specifically to purge it. Yes, this is a waste, but, unless it dies this thus, it will get stuck.
This is normal behaviour.
Nothing gets stuck and the printer just continues.
The same process occurs for the AMS lite and the AMS.
It doesn’t need to retract it. It just pushes in the new filament which will push the old filament out.