Clogged Hotend Fix

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otzelot
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Clogged Hotend Fix

Post by otzelot » Fri Jan 19, 2018 11:22 am

I often had a clogged Hotend during printing. never found out why. I mounted a second Fan on the first Fan just using longer Screws. Since then i never again had a clogged Hotend.
20180119_111845.jpg

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gfeliksdal
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Post by gfeliksdal » Mon Jan 22, 2018 10:03 pm

Hi, I'm curious to know what voltage did the old fan turn? Most likely that the fan is/was not spinning right. Perhaps a wire breakage? Normally the fan should blow more than enough cool air to print reliably.

Sullos
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Post by Sullos » Wed Jan 24, 2018 12:03 pm

Is the fan supposed to draw air away from hot end or towards it?

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gfeliksdal
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Post by gfeliksdal » Wed Jan 24, 2018 12:08 pm

It should blow towards it.

Sullos
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Post by Sullos » Thu Jan 25, 2018 12:24 pm

ok checked fan and checked all belts connections
repetier host in use for printing pla
temp 200 bed 55 fan 100 feedrate 100 are these settings ok I cant find info on recommended settings?
using cura slicer at print sp 45outer 38 infill 71 (seeming like default settings?) was printing a felix spool holder 199 layers
was going great even good print quality with good quality filament i paid higher price for, and on about layer 20-30 it starts air printing even after completely dismantling cleaning out and rebuilding I just cant get this damn thing to work had it 3 years and I keep coming back to it, can anyone recommend settings changes? tonight was first time in 2 years Ive had it STARTING to print good!
my UP mini is way more reliable and twice as old I only bought this as it was larger print surface.
if anyones got any tips before i finally throw it in the bin and go buy a prusa?
desperate now :(

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gfeliksdal
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Post by gfeliksdal » Fri Jan 26, 2018 3:42 pm

Sorry to hear you have experienced these issues all the time. My suspision is that the thermistor is defect. Can you try a temp of 170 degC, perhaps the thermistor is causing issues. If the temp is a lot higher than what is measured. It will give constant clogging/airprinting. Also what are the room conditions? Is the room below 32degC? If you need two fans to cool it down, then there is must be a temperature issue. Or perhaps bad filament.

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