1 Topic by Krythis

  • Krythis
  • Krythis
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  • From: Depew, NY
  • Registered: 2013-02-27
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Topic: Print Curling - Not print surface issue

I ran into an issue when trying to print an object with a hole through it. While building up the print, prior to bridging, the layers will begin to curl up. Any thoughts on why this would occur?

Acrylic enclosure
E3D hotend @ 200º and 225º with no apparent change
qu-bd bed heated to 90º
No bottom warpage
Octave red ABS
.35mm layer height with speeds apx 15-20% higher than default

Also noticing some waviness to the layers when I watch closely. It doesn't lift nearly as much as the layers in question, but you can see some gaps in the image that were caused by this. apx 50% humidity in room with AC. I may need to pick up a tote to start storing my filament in.

http://i.imgur.com/fdSI30i.jpg

E3D-v4 Hotend, MK5 carriage with round plastic wire conduit , 3/16" tempered glass,  Well nut, SureStepr SD8825 1/32 Extruder Driver, PowerEdge 2650 500W PS, QU-BD heated bed, circuit board fan, hinged plexiglass enclosure with plastic tray top. Other than that mostly stock SD3

2 Reply by Krythis

  • Krythis
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  • From: Depew, NY
  • Registered: 2013-02-27
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Re: Print Curling - Not print surface issue

Is this a case where a fan would help or would that only make it worse?

E3D-v4 Hotend, MK5 carriage with round plastic wire conduit , 3/16" tempered glass,  Well nut, SureStepr SD8825 1/32 Extruder Driver, PowerEdge 2650 500W PS, QU-BD heated bed, circuit board fan, hinged plexiglass enclosure with plastic tray top. Other than that mostly stock SD3

3 Reply by Gomisan

  • Gomisan
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  • From: Adelaide, Australia
  • Registered: 2013-07-29
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Re: Print Curling - Not print surface issue

Exact same thing is happening to me, its enough to catch the nozzle and knock a whole print off.  My enclosure is keeping the environment nice and stable, a small thermometer tells me my air temp is about 41C once its been running a while.

I 'think' a nozzle cooling fan is the answer here, but I havent printed a mount yet so I cant test that.

If you try it, let me know how you go.

Gomisan's Website

4 Reply by 2n2r5

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  • From: Frederick, MD
  • Registered: 2013-05-09
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Re: Print Curling - Not print surface issue

This is definitely as issue that can be fix with a cooling fan. I don't know of any fan mods that will work with the E3D unless you have lawsy's carriage replacements.

http://www.soliforum.com/post/32712/#p32712

SD3 w/ mods:
Glass bed with QU-BD heat pad upgrade, threadless ballscrew w/ 8mm smooth rod, spectra line belt replacement, lawsy MK5 extruder, Lawsy replacement carriage, E3D hotend, Ramps 1.4 w/ reprap discount controller, DRV8825 drivers, 12v 30A PS, Acrylic case, Overkill Y-idlers, Filament alarm, Extruder fan + more.

2n2r5's Website

5 Reply by ronsii

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  • From: PNW
  • Registered: 2012-10-28
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Re: Print Curling - Not print surface issue

Basically your print head is heating up the layers below the current layer and allowing the top to shrink and the lower layers then let it pull up...short of putting a cooling fan on there you might try if you haven't already set the print temp as low as you can and still print good or speed up the print head so it isn't remelting previous layers as much.

6 Reply by mm2tts

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  • Registered: 2012-11-16
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Re: Print Curling - Not print surface issue

We have an enclosure, but also heat the enclosure with a "personal" small space heater (got it from Amazon). This heats the interior to 50C according to the temp reading from the extruder's thermistor before the extruder has been heated. It helps keep the ABS stable. We also have a fan ducted around the nozzel.