Print warping at corners, please advise

**vanarsd** · 03-13-2015, 04:51 PM

Printer: Airwolf HD2x (Dual Extruder)
Material: ABS 2.88mm

Problem:
I am having an issue with a simple 1" cube print. In the first 3/8" of the print, 3 out of 4 corners are showing warpage (see attached image). My best guess is that the second extruder head is adding too much heat to the print. But, I would like to get some expert feedback from the forum. Thank you.

For slicing the STL I used Astroprint. Settings below:

Print settings:

Slicing Software

Cura

Layer Height

0.1 mm

First Layer Height

0.27 mm

Shell Thickness

1.5 mm

Solid Top

Yes

Solid Bottom

Yes

Fill Density

35%

Print Speed

20 mm/s

Infill Speed

30 mm/s

Inner Shell Speed

30 mm/s

Outer Shell Speed

20 mm/s

Travel Speed

125 mm/s

First Layer Speed

10 mm/s

Number of Skirt Lines

3

Skirt Gap

5 mm

Skirt Minimal Length

150 mm

Number of Brim Lines

5

Support

None

Support Type

Lines

Support Angle

70 deg

Platform Adhesion

None

Raft Margin

5 mm

Raft Line Spacing

1 mm

Raft Base Thickness

0.3 mm

Raft Base Line Width

0.7 mm

Raft Interface Thickness

0.2 mm

Raft Interface Line Width

0.2 mm

Raft Air Gap

0.4 mm

Raft Surface Layers

2

Support Fill Rate

35%

Support X/Y Distance

0.7 mm

Support Z Distance

0.15 mm

Support For Dual Extrusion

Both

Wipe Tower Volume

25 mm³

Filament Diameter

2.85 mm

Filament Flow

95%

Print Temperature

240 °C

Print Bed Temperature

105 °C

Enable Fan

Yes

Minimum Fan Speed

0%

Maximum Fan Speed

0%

Fan Full Height

0 mm

Minimum Layer Cooling Time

15 secs

Minimum Cooling Feedrate

2 mm/s

Enable Retraction

Yes

Retraction Amount

5 mm

Retraction Speed

50 mm/2

Retraction Minimal Travel

1.5 mm

Retraction Minimal Extrusion

0.02 mm

Retraction Combing

Yes

Retraction Hop

0.25 mm

Retraction Dual Amount

16.5 mm

Spiral Vase (Joris)

No

Wipe Tower

No

Ooze Shield

No

Cooling Head Lift

No

**raysspl** · 03-13-2015, 05:34 PM

There are a couple of things. The slicing could be imperfect, the extruder isn't making close enough contact thus cooling the filament quicker than it should, & leveling can be off but in your case, the last probably isn't necessarily true since it's a small object.

**richardphat** · 03-13-2015, 11:21 PM

Sharp edge by default warps alot. Put a brim and the problem should be solved. Not the default one, but modeled through your software. It shouldn't even lift....

Edit: Flip and show us the bottom face, it will tell if your z calibration is done right.

**vanarsd** · 03-17-2015, 01:52 PM

Originally Posted by richardphat

Sharp edge by default warps alot. Put a brim and the problem should be solved. Not the default one, but modeled through your software. It shouldn't even lift....

Edit: Flip and show us the bottom face, it will tell if your z calibration is done right.

Thank you for the tip.

In the 3D model there is a filleted edge but it is only visible on the top side of the actual print; the bottom printed a sharp edge.

How do you recommend modeling the brim? My understanding is that it will become merged with the part and I will end up having to saw them apart. See image below for bottom side of print. Thanks.