I purchased my P1S a few weeks ago with the AMS. It has been printing fine with PETG but I changed to PLA last night to print another model. The AMS loaded the filament, the bed levelling was fine and the printer started printing but no filament was being extruded. I stopped the print and the AMS tried to unload the filament but failed.
I was unable to remove the filament fully from position 1 on the AMS so tried to load filament on position 2 which failed.
I disassembled the AMS to remove the blockage and removed the filament which was stuck between the AMS and AMS buffer and the AMS now loads the filament as far as the AMS buffer but then gives intermittent movements like it is trying to feed filament further. This continues for 2-3mins but the AMS then unloads the filament and gives an error that filament can’t be loaded.
I’m guessing there is a blockage between the AMS buffer and the hotend but have not had time to investigate further.
Would it be best to remove the hotend and check for blockages from that end or to disassemble the AMS buffer and check for blockages there?
You don’t need to remove the hotend maybe. You can just pop the tubing out the top of it and look down into the print head. If you find anything in there it may be loose where you can grab it with fine tweezers. If there’s something in there that is stuck, check the wiki for how to do a cold pull.
I’ve had a few odd breaks of brittle filament and was surprised where they were. It could be you have some odd bits stuck in the path. You can undo the tubing at different locations and try inserting some filament manually and see how far it goes. That ends up being a nice measuring stick too to tell you right where a blockage is. Not sure how well running the filament backwards goes.
Also, might check if the teflon tubing is fully inserted at all joints. If it isn’t and is slightly pulled back, it can expose an internal ledge that the filament can catch on.
I took the hotend off last night but could only see a tiny bit of the grey PLA in the top.
The AMS is only feeding the filament as far as the filament buffer on the back of the printer and it stops and then takes it back with a feed error.
I removed the filament buffer and removed the tubes. I can push filament through the filament buffer so it is clear.
I turned the tubes around so the end that was going into the filament buffer is now going into the AMS. The AMS feeds the filament to the same point and stops.
With the tubes on, I can’t push any filament through the filament buffer at all so something is stopping it. The tubes are all clear as they’ve been swapped around.
I can only think there is some kind of issue with the filament buffer on the back and will need to contact support.