In the video, although hard to notice, you can see the AMS Hub moving up and down following the retractions and extrusions of the toolhead.
It only happens with Slot 3, which I’ve also had frustrating jamming issues seemingly for no reason with. All other slots don’t do this.
How do I fix this?
can you show us a pic of the whole machine and ptfe tubes. This is friction, i get it when using a couple of filaments that have an outside that’s rougher, ergo more draggy. Filament going down each ptfe path touches more and presses at the bends in it. Sometimes just re-positioning the ams will help.
With the printer idle, press each orange button on the ams lite and pull and push that filament in a few times a little to see how draggy it is. My carbon fiber and Amazon filaments are bad for this and I found that moving a bit of the kink out the path made the test pull back and forwards a bit easier. After that, I had no issues.
Inspect path 3 for nicks or kinks and compare the whole length with the other 3 ptfe tubes. It could also be the inside of that tube that had a defect. Switch path 2 and 3 tubes and see if the issue moves.
hth
I have a top mounted AMS and don’t have space for it to be anywhere else. I tried redoing the PTFE tube positioning but they’ve been almost “molded” into the position they are at now, and it didn’t make a difference.
Because no matter what PTFE tubes I used worked, I was able to eliminate the PTFE tube being an issue (although the orientation definitely does help or play a part in the issue, but it’s not the main cause). I then tried different filaments in the slot to eliminate it being a filament thing, and was sad to see all filaments still had the issue. As I said, I took off the AMS hub to try to look for clogs or see if that was the issue (it wasn’t but it uncovered another issue), and then at that point the only other factor was the AMS Lite especially considering during printing if I hold the orange tab down in slot 3, the bobbing of the AMS hub stops.
So I’m wondering if the AMS lite isn’t feeding enough on Slot 3 for whatever reason. Nonetheless the AMS Lite is something I’d rather not go into and mess with for fear of breaking it further. I’m not sure what in the AMS is wrong or broken. But I’m going to likely have to request a replacement hub and AMS piece (not an entire new AMS), which will be tricky especially since describing this entire issue is tricky.
I’m just gonna refer them to this thread because re-explaining everything for support will be hard:
Interesting issue, maybe insert a couple/many bowden tube clips and see if that keeps the tubes in place?