Comments on: Fixing CupCake Build Problems

By: Keith Neufeld

Keith Neufeld — Wed, 10 Mar 2010 14:01:36 +0000

Jay, according to my notes, all I’ve done with Unpause is activate it — I haven’t tweaked the individual settings. My recollection is that simply enabling Unpause immediately made such a huge difference that any fine-tuning I might want to do is obscured by other Skeinforge tuning I need to do first.

By: MakerBlock

MakerBlock — Wed, 10 Mar 2010 13:46:03 +0000

Hi Keith,
What settings do you use for Unpause? Right now I’m using:
Delay (milliseconds): 28.0
Maximum speed (ratio): 1.5
Awesome info as always!

By: Dave M

Dave M — Tue, 12 Jan 2010 23:21:02 +0000

Interesting. I turned off Comb yesterday, and my part ended up with hairs! With it on, I didn’t have any hairs. I’m also running 0006. I’m going to try Unpause next to see how that works for me.

By: Dave M

Dave M — Sat, 09 Jan 2010 18:33:27 +0000

Thanks, Keith! 30 degrees from vertical makes a lot of sense.

By: Keith Neufeld

Keith Neufeld — Sat, 09 Jan 2010 13:31:09 +0000

Dave M, the generally accepted overhang value is 60°, meaning that you can print something with an overhang of 60° up from the horizontal plane (or 30° out from vertical). It’s a fairly shallow overhang because it means that no extrusion thread is unsupported underneath, as it would be with a 45° overhang or “less.”

(Personally, I think the overhang measurement is confusing — I think it would be more clear to measure the deviation from vertical than to measure the angle up from the horizontal plane. But as long as you keep it in mind, then whatever.)

So the top flange of the pulley is designed with a 30° supporting cone underneath. In the terminology used in CATIA, that’s a 30° chamfer — although Zach actually designed the pulley by drawing the radial cross-section and then spinning it around the axis. But you get the idea.

By: Dave M

Dave M — Sat, 09 Jan 2010 06:05:08 +0000

Great post! This should really help me clean up some of my prints. I have been somewhat plagued by blobbing, especially around small curved features.

I’ve wondered how you guys are printing “overhanging” features, like the top flange of your pulley. Is there a magic fillet radius value that works, depending upon the layer height?

By: Cliff L. Biffle

Cliff L. Biffle — Sun, 03 Jan 2010 00:55:59 +0000

I greatly appreciate your scientific approach to this — the before and after prints for Unpause were priceless. Gonna go play with Unpause now.