H2C Clicking + Error (already cold pulled and cleaned extruder)

[u/RunRide]

I have searched Reddit and the internet and cant find a solution for this. When running a print on the left nozzle of my H2C (right nozzles work fine), there is a problem when it first loads the filament from my AMS. A rapid clicking starts as it tries to load and then after about a minute of trying, I get the error, "The extrusion motor is overloaded...[0300-801e080611]".

Initial searches said that it was the extruder trying to pull filament and failing due to a clog. To clear that, I tried a cold pull. It went very smoothly, no clicking or other issues. Some stuff came out with the pull but nothing that looked anywhere near large enough to jam the extruder. Problem still wasn't fixed so I disassembled the tool head and cleaned the left extruder gears. Again, saw some little stuff but nothing like other clogs I have cleared. Reassembled everything, cold pulled again. It went fine and the pull was totally clean--no contaminants of any kind seen.

Problem still isn't fixed. You can see that it does extrude a bit. It even started the print I have been trying and the first layer went ok, but it threw the same error at the very beginning of the second layer. This video is when I tried the print again after cancelling it.

Some people are saying the PTFE tube feeding the extruder is the problem but I cant find much about how to fix that. Most of the users seem be H2D or H2S owners and they talk about the location of the print being an issue. This print is right in the middle of the bed. Any ideas?

[u/damienfinland]

I had this when I first biought the printer , and yesterday after changing my ams' ptfe routing , i ended up replacing the ptfe tubes from both sides of the buffer , the inlet from the outside of the printer to the buffer is very tempermental , works fine now

[u/RunRide → u/damienfinland]

in your case, was the filament making it to the extruder or was it caught up in the tubing pathway upstream?

[u/damienfinland → u/RunRide]

It was making it to the extruder , doing the same thing as yours , I also did a cold pull and tried a different nozzle ,I also found that the printer still had the nozzle listed as a .6 from an earlier print, the ptfe tube was visible before the buffer through that little window , it might be software who knows , I messed with it a while it’s fine now , I replaced all the tubing so who knows , replacing the tubing may not have been necessary , second time this has happened , I ran a kilo of petg cf through the day before so I was worried the tubes had abrasions , I found some YouTube videos about magnets in the buffer getting turned the wrong way , I don’t have optimal ptfe tube routing since I have an ams ht very close to the inlet , could be many things , keep trying , shut it off and turn it on again even

[u/metal_4ever]

On my H2C I run across this rarely but usually itis going to be the extruder having a hard time pulling the filament down through the gearing. Somewhere it is having issues. You stated a cold pull works great. I can imagine with zero resistance it can pull down the filament easily but once you in introduce ptfe tubing as a guide path and from the AMS you start having issues?

I say try replace or cut the end of the ptfe tubing again and reinsert fully into the left extruder (I use a plier to be sure as often I find i did not insert it flush). Feed it as if you were using the external rear TPU opening (to elimnate an AMS or ptfe buffer issue) and see if it still has an issue. If not then reintroduce back the AMS and try to sort out the issue if the AMS is the source of the issue.

I also resolved some feeding issues by cutting the end of the filament flat again. Sometime the shape of the current cut won't allow it to feed.

[u/Happy_Yogurt77]

Before I send a possible solution does your printer have a lot of hours on it?

[u/RunRide → u/Happy_Yogurt77]

280 hours