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Issue with hotend temp  

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MechLink
(@mechlink)
Estimable Member
Issue with hotend temp

Hi, I have had my MM upgrade for about 2 weeks and it has been working fine but today today it started acting strange, I don't know if it me or something with the printer.

The issue is that the filament stated to jam, so I checked everything on it and it all works fine till you start to print then it jams again regardless of what extruder I use or material.
I have taken it a part about 3 times now to check everything from the wire to the motors, plugs on the board and everything seems fine.
I re-flashed the firmware to make sure it was working correctly along with changing it from high-powered to low and back to high to see if either mode made a difference which it didn't.

I tried running some PLA through it manually buy pulling one of the PTFE tubes off the MM on top of the hotend and I notices it was very difficult to push it though the nozzle even after I took the MM Y Splitter off and going straight to the hotend.
I even put a new nozzle on it to be sure and the hotend is the new one that came with the MM upgrade.

I check the temp on the screen and it shows 215/215 which is normal for PLA and it doesn't seem loose temp, so I turned the temp up to 225/225 and it seems to have fixed the issue with the filament not wanting to go through ans I have printed several things with it sense with no issue.
side note the printer seems a bit quieter too which it was pretty quiet to begin with at least for me.

I am wondering if maybe the sensor on the hotend is not right or if I am missing something?
any help on this would be appreciated

Thanks, Adam

See my stuff at
https://www.printables.com/@MechLink
https://www.myminifactory.com/users/MechLink

Postato : 07/11/2017 9:46 pm
HikerGlenn
(@hikerglenn)
Active Member
Re: Issue with hotend temp

I have the exact same issue with my MK2/MM. We had to increase temps about 15-20C to get decent prints. I wonder if there is some additional software calibration needed with this combo. Did you resolve your issue?

Postato : 21/11/2017 7:45 pm
ntdesign
(@ntdesign)
Reputable Member
Re: Issue with hotend temp

Could be that molten filament was pulled up into the heatbreak and is sticking there, which increases friction. This can happen when you print too hot and do a fast retracts.

Postato : 22/11/2017 4:06 pm
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