Hi all, recently bought a P1S combo and have been having issues with the AMS where when the filament runs out, the light on that slot goes red but it seems the toolhead stops pulling the filament so it never detects its runout. The filament will still be somewhere in the toolhead and require me to yank it out.
It’ll eventually just start printing in midair and require me to stop the whole print and shut down the machine to pull out the filament.
So far its not caused anything to break but its happened to me twice now.
I even decided to test it after the first time this happened by simply cutting the filament mid-print and letting it pull through until it realized it was out and alerted me it needed new filament. Worked great that time. I set it back up and let it run, I caught it close to the end of the roll and snipped part of the filament on the spool so it was a straight pull to help it before I swapped rolls, it pulled the last of the filament from the spool into the AMS feeder and once again the light went red and the toolhead seems to not be pulling it through but still trying to print and eventually begins printing nothing in midair.
It seems like either the toolhead isnt gripping the filament after it runs out and doesnt have the AMS pushing it?
I’ve been searching the reddit/google for similar issues and not really found anything like this but its becoming a thing that concerns me as its one of the major reasons I bought the AMS.
Welcome to the forum.
I´ve never had or read about any similar issue.
As you mentioned in your test, the printer should pause the work, alert you of the filament running out, and request to replace the spool or automatically switch to another spool if you have enabled the Fillament Backup option.
Is the red light flashing, or is it on? Does it happen in any slot or a specific one?
I also advise you to open a ticket or use the new chat feature, as you may have some faulty components, and BL support is required.
@johnfcooley I do have auto refill turned on, but at the time I didn’t have any refill option for it but the option is always on, and it was on when I did the cut test which worked fine and paused the print.
@JayZay I did another test just earlier and once again it realized and stopped. The light from memory flashes red when this happens. I think it was typically slot 3 where I’d done this, ill test it again later and open a ticket if it happens again.
So I tested it and recorded the procedure this time, I turned off autorefill as per @johnfcooley 's suggestion. Also watched the light and it was solid red, not breathing sorry.
This time I tested both port 2 and 3 doing the same procedure.
Started a print,
Cut the line it was pulling from,
It pulled the filament in,
Light went solid red for maybe 3-4 minutes,
The light then went off,
It pulled the filament all the way through and stopped after it reached the hotend,
Sent me a warning to swap in a new filament.
Perfect. This is how it should be every time it runs out.
Once again it functions fine when I test it myself, still nothing jumps out at me as to why it fails whenever I’m not directly at the printer. Really frustrating.
put 2 spools in the ams. Tell the ams they’re the same colormaterial, doesn’t matter if they really are, just need the ams to believe they are.
Turn on auto refill.
Do a small test print, cutting the filament you start with to see if auto works.
I’m thinkning maybe a bug kicked in because you had auto on and nothing for it to kick to. Shouldn’t have done that and maybe it wasn’t it. Need to either confirm or eliminate though.
@johnfcooley I did this on AMS unit 2 and 3, checked the auto refill option and it said it’d go from 2 to 3.
Started another print and snipped 2.
It errored out again like the first time, I got an error this time though “Warning: Timeout purging old filament: Please check if the filament is stuck or the extruder is clogged. After troubleshooting, clikc the “Retry” button.” error code 0700-8013 092313. I checked it and tried hitting retry and all that happened was the toolhead moved a little then the AMS made a gear sorta winding sound and nothing happened. Same error.
I had to once again remove the PTFE tubes and tear out the filament because the toolhead holds onto it so tight, then open up the extruder gears to pull out the filament that got stuck from me removing it cold. Set it all back up again and it pushes filament and prints fine.
I’m going to try eliminating the actual filament this time, I mainly use Sunlu PLA/PETG and im beginning to wonder if perhaps the AMS is having an issue with it, maybe its too slippery for the AMS gears?
When auto kicks in it attempts to load what you’ve called the “same”.
It will attempt to pull filament from that spool and then purge out whatever is in the line from the old spool. Once done it will finish feeding filament. If nothing is there you’ll get the error you did.
If it’s on but there isn’t a “same” filament that it has either been told is the same or it has read the RFID tag as such in the AMS it defaults to normal runout procedure.