Tutorial Object - Eliminating Warp in Large Objects

by wildseyed, published

Tutorial Object - Eliminating Warp in Large Objects by wildseyed Dec 25, 2012
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A part this size would normally be impossible to print in ABS without warping. The main features introduced are the partitioning slits along the body, the anchor pads at the base, and corners, and a flat cieling to avoid drooping extrudate.


This is not intended to be printed, but rather to serve as a visual example of attributes that reduce, or eliminate warping in parts, when printing with ABS.

Corners are especially suceptible to lifting off the glass when printing with ABS. Including anchor pads at the corners will help keep things down for the duration of the print. The pad should be a sinlge layer thickness.

Long, straight walls will also tend to lift and warp parts. You can break up walls with slits to mitigate this kind of problem. If you cannot have holes in the walls, you can corrugat them instead. Have a look at my Wildberry Pi case for an example of this.

The cylinder roof would cause a overhang greater than 60°, so flattening the roof at the 60° mark forces the part to bridge.

One last thing. Temperature is very important when printing ABS on glass. Start at 110°C, and don't stray too far one way or the other. Insulate the bottom of the bed to maintain a more uniform distribution of heat.

Happy printing!

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It is neat that you are posting printing tips in this fashion :)

I'm working with PLA instead, but some of the tips are still applicable!

I hadn't considered it before, but I like the idea of triggering bridging by flattening barrel-vaults.