Problem with rear side of Test Cube
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I'm afraid I'm out of my experience zone with ABS.
I have read not to use fans for the first 3 layers, but that's not your problem.
Do you see filament extruding on the back cornets?
Do you hear your extruder struggling/clicking when that happens?
Can you rotate the cube 180-degrees to see if it then happens on the front?
Can you rotate the entire printer 180-degrees to see if it changes due to airflow?
Do you have an enclosure?
My only ABS experience is using a Stratasys where everything is controlled for me and it works perfectly.
Someone with more ABS experience will probably jump in next and hopefully be able to help you more than I can.
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I do have, but the printer isn't in it at present while I'm working on it. I usually drop the bed temp down when the printer's in there.
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From what I have read ABS really needs a heated enclosure BUT I don't know if that is related to your problem.
Frederick
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@alankilian said in Problem with rear side of Test Cube:
1/ Do you see filament extruding on the back cornets?
2/ Do you hear your extruder struggling/clicking when that happens?
3/ Can you rotate the cube 180-degrees to see if it then happens on the front?
4/Can you rotate the entire printer 180-degrees to see if it changes due to airflow?
5/Do you have an enclosure?1/ Back cornets?
2/No clicking, extruding nicely when I move it up and extrude some filament.
3/I should have mentioned that I had done that, it still happens on the rear (mainly)
4/The pinter is on a wheeled trolley, I have tried that. Ambient temp is 18.4C atm. -
"From what I have read ABS really needs a heated enclosure BUT I don't know if that is related to your problem. Frederick"
Yes, I found that out a while ago, which is why I made the one in the pic. It is made from 50mm expanded foam, coated with thin fiberglass panels. The material came from an old coolroom.
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But the issue remains. Any other helpful suggestions, they've been good so far?
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@dmbgo said in Problem with rear side of Test Cube:
But the issue remains. Any other helpful suggestions, they've been good so far?
Instead of printing a cube can you create a model of a disc, say, 50 mm in diameter and 5 mm thick?
If you can print it using you normal settings.
Frederick
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Here's a pic of the printer:
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Sorry Fredrick, but my modelling capability is V low. Could you please suggest a model from thingiverse or somewhere?
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@dmbgo said in Problem with rear side of Test Cube:
Sorry Fredrick, but my modelling capability is V low. Could you please suggest a model from thingiverse or somewhere?
Here you go.
Slice it normally but keep the layer cooling fan(s) off.
Frederick
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Thanks Fredrick
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@dmbgo said in Problem with rear side of Test Cube:
Printing now
I will check back in a bit.
Frederick
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Where are you Fredrick? If it is too late at night, we can leave it until tomorrow.
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@dmbgo I'm here.
Frederick
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The disk is printing at 30 mm/s. It will probably take about 20mins more.
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@dmbgo said in Problem with rear side of Test Cube:
The disk is printing at 30 mm/s. It will probably take about 20mins more.
What does it look like so far?
Frederick
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OK.
I'll check back in 15 mins.
Frederick
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The bed levelling is a bit out now, but I dont think it will affect the disc