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Something wrong with hotend and temperature  

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Killmyday
(@killmyday)
Active Member
Something wrong with hotend and temperature

Suddenly when I attempt a print nothing gets printed.
If I go to Purge nothing comes out the nozzle, but if I go into settings and heat the nozzle head to 280 and eminently go to Purge it comes out just fine.

If I attempt a calibration test same thing, after a preheat it goes some what ok, but second try nothing get's out??

Any suggestions would be appreciated.  

Posted : 07/08/2021 10:39 pm
JoanTabb
(@joantabb)
Moderator
Aint half hot round here

Is the extruder temperature above 170C?
there is a low temperature extrusion prevention temperature set at 170C

Joan

 

 

 

 

 

 

 

 

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK...
Posted : 07/08/2021 10:46 pm
Killmyday
(@killmyday)
Active Member
Topic starter answered:
No its 215 degrees

When it attempts to either print or purge it's 215

Posted : 07/08/2021 10:53 pm
JoanTabb
(@joantabb)
Moderator
Odd behaviour.

Hi. 
I don't have a mini myself. 
could you please  unload the filament and see if there is a section chewed out by the extruder drive gear? 

then could you disconnect the PTFE bowden tube from the extruder, reload the filament, and ensure that the filament extends beyond the end of the PTFE Tube, if it does, then without refitting the PTFE tube, start a job and see if the filament feeds through the ptfe tube as you would normally expect for printing? this should show you, whether the issue is extruder related or hot end related. 

If the filament feeds as expected, check that your hot end liner PTFE is in good condition and that the hot end is correctly assembled, some mini's were supplied with short Hot end PTFE tubes, and some Mini hotends were incorrectly assembled with the heatbreak tube extended too far. 

If you have to adjust anything in the hotend. please re adjust the Pinda (Spinda) height, and re run Live Z calibration. 

regards Joan

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK...
Posted : 07/08/2021 11:10 pm
Killmyday
(@killmyday)
Active Member
Topic starter answered:
Found the error

It turned out it was the thermistor that was faulty, ordered a new one.
I think it happened when I was changing the Nozzle to a steel one, it's quite sensitive right?.

Posted : 08/08/2021 9:13 pm
JoanTabb
(@joantabb)
Moderator
Thermistors are fragile

thermistor wires are very flimsy

did you order two... one for now and one for next time!

Joan

I try to make safe suggestions,You should understand the context and ensure you are happy that they are safe before attempting to apply my suggestions, what you do, is YOUR responsibility. Location Halifax UK...
Posted : 08/08/2021 10:25 pm
Killmyday
(@killmyday)
Active Member
Topic starter answered:
Actually

I ordered 2 and a complete head end, just to be sure.

Posted : 08/08/2021 10:46 pm
cwbullet
(@cwbullet)
Illustrious Member
Hotends

 

Posted by: @killmyday

I ordered 2 and a complete head end, just to be sure.

That is a safe way to go.  

--------------------
Chuck H
3D Printer Review Blog...
Posted : 08/08/2021 10:57 pm
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