Hardened Extruder not extruding

Bambu Lab P1 Series Troubleshooting
1

I had upgraded the printer with the hardened nozzle and extruder in preparation for printing some CF and glow in the dark things. After I printed a couple of rolls of PETG and a roll of silk I started having issues.

I thought it was clogged nozzles, Replaced and still more “clogs”. Turns out the only way the extruder would work is if I pushed on the filament. It simply will not move filament continuously. Tried with PETG, PLA and more SILK.

Replaced the hardened extruder with the original one and it seems to be working just fine now.

Has anyone else had the same issue? The hardened gears are just not very grippy. Thoughts?

2

Happened to me once & the cause was the teflon tube going into the inlet fitting on the top of the print head had come loose & was causing the filament to bind. The printer continued moving through the pathwork, but wasnt extruding anything.

They should have a sensor that monitors the filament speed in relation to the setpoint & stop the print if theres a deviation.

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3

That would be nice. I had checked all of that and even readjusted the PTFE tube to make it smooth through the whole range.

I wish it was something like that though!

4

Sounds like a problem with the control board. Did you fit the x1 hardened extruder complete and swap the board over to the p1p one, or just the gears?

5

This is a P1P. I swapped the hot end and the extruder gears at the same time. It just seems to no longer be able to grip filament of any kind…

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6

There’s 2 options, change out just the gears for the hardened ones, or change the whole assembly for the x1 version using the p1p control board. If you just changed the gears for hardened ones, check the tensioner spring is fully in and also check the control board plug is fully home.

7

For the P1P there is only changing the gears I think. I changed those, checked the tension spring was fully in. Plug was fully home. You could see the yellow big gear move, just no filament fed through.

If I pushed on the filament it would feed and extrude. Basically the extruder gears lost their grip. The older non-hardened gears are working fine.

8

Yeah ok. I changed out the whole extruder on mine with the complete x1.

9

I didn’t even know that was a thing I could do. Seems like I’d need the whole X1 assembly. How’d that work out?

10

Yeah, it’s easy. You just take off the x1 control board, two screws and fit the one from the P1P. Apart from that board, the extruder housings are the same.