# Support Overhang Angle

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Posted (edited) · Support Overhang Angle

I studied the recommended Cura profile of Ultimaer S3 / PLA 0.4 nozzle / Draft Fast 0.2mm:

Layer height: 0.2 mm

Outer Wall Line Width: 0.4 mm

Support Overhang Angle: 60°

To my supprise, Support Overhang Angle is NOT a calculated value!

My printer is Creality CR-10sp. In all its profiles Support Overhang Angle is calculated from a formula. My experiments also show that the formula is a sound choice. According to this formula, the Support Overhang Angle for the Ultimaer S3 profile should be calculated as:

• Support Overhang Angle = atan(0.4×50% ÷ 0.2) ÷ 3.14159 × 180 = 45°

So the recommended angle 60° for Ultimaer S3 would surely lead to failure. Hope to know what you think about this. Thank you!

Edited by curasurf
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Posted · Support Overhang Angle

As far as I know a 60deg overhang is perfectly printable on an S3.

The formulas for non Ultimaker printers are not created by us. It's up to the contributors in question to set them.

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Posted (edited) · Support Overhang Angle
30 minutes ago, nallath said:

As far as I know a 60deg overhang is perfectly printable on an S3.

@nallath   According to the recommended profile Ultimaker S3 / PLA 0.4 nozzle / Draft Fast 0.2mm, the picture would be:

Layer height = 0.2 mm

Line width = 0.4 mm

Overhang angle = 60°

Do you think it's ok?

Edited by curasurf
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Posted · Support Overhang Angle

Our material engineers do seem to think so 🙂

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Posted · Support Overhang Angle
4 minutes ago, nallath said:

Our material engineers do seem to think so 🙂

That's really a bold profile. Let me try it. Thank you!

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Posted (edited) · Support Overhang Angle

It seems to be magic for some Ultimaker profiles. I know that disabling "Outer Before Inner Walls" would give some help, but it's really magic.

Ultimaker S3 / PLA 0.4 nozzle / Draft Fast 0.2 mm
• Layer Height = 0.2 mm
• Outer Wall Line Width = 0.4 mm
• Overhang angle = 60°

Ultimaker S3 / PLA 0.4 nozzle / Default Fast 0.2 mm
• Layer Height = 0.2 mm
• Outer Wall Line Width = 0.35 mm
• Overhang angle = 60°

Ultimaker S3 / PLA 0.8 nozzle / Default Extra Fast 0.3 mm
• Layer Height = 0.3 mm
• Outer Wall Line Width = 0.75 mm
• Overhang angle = 70°

Ultimaker S3 / PLA 0.8 nozzle / Default Sprint 0.4 mm
• Layer Height = 0.4 mm
• Outer Wall Line Width = 0.75 mm
• Overhang angle = 70°

Edited by curasurf
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Posted · Support Overhang Angle
On 2/25/2021 at 12:18 PM, curasurf said:

Ultimaker S3 / PLA 0.8 nozzle / Default Sprint 0.4 mm
• Layer Height = 0.4 mm
• Outer Wall Line Width = 0.75 mm
• Overhang angle = 70°

I wonder whether somebody tried this profile with S3 printer. It's unbelievable.

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Posted · Support Overhang Angle

Looking at your sketches the max should be about 63°.  This is 60° then 70° on the Ender3P.  The 60° looked spot on.  The 70° had consistent sagging of .5 to .8mm once it got away from the transition point.  My fan works quite well.

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Posted · Support Overhang Angle

Hi @GregValiant   Thank you for your experiment and comment! You are always helpful!

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