glChess chess set 2

by TimEdwards, published

glChess chess set 2 by TimEdwards May 19, 2014
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glChess chess set 2 by TimEdwards is licensed under the GNU - GPL license.

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This is a version of the chess set from glChess and the Linux xscreensaver hack called "endgame", which I first posted as Thing number 322616. That version had severe overhangs that could cause problems with all but the very best slicer software. This version changes all overhangs to less than 45 degrees, making the set more likely to slice and print without difficulty. The sole exception to the overhang rule is the knight, for which a manually-generated support has been designed. If you wish to try auto-generated support for the knight, the version without the support structure is also included. All pieces have been scaled correctly for a standard chess board size (that is, 25% larger than the original set posted).
Update May 20, 2014: The knight support structure was modified to reduce the gap between the support and the piece.


See the instructions for the original glChess set, thing number 322616. Instructions are basically the same. However, all pieces in this set are correctly sized (in mm), and all pieces are manifold. If you use the version of the knight that includes the support structure, then no additional support is required (all overhang angles are 45 degrees or less).
Pieces should be printed in groups, to prevent the extruder from dwelling on any single piece for too long, thus working over soft plastic and producing poor results. Since the extruder will tend to dwell on the tallest piece after all shorter pieces have finished printing, this set includes a piece called "cooling_tower" that is the same height as the king. Place the cooling tower as far away from the tallest piece (e.g., the king) on the platform, to allow a longer time for each layer of the tallest piece to cool, while the extruder is off drawing another layer on the cooling tower.

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How do I download the file so that I can edit and make changes on it before printing it?

This set was made just that way: By editing the original source. But for the actual source files, you'll need to go to Thing #322616. Still, I found out by a lengthy investigation that the original source code (in C) parses data files which are in such a specific format that it's very difficult to rewrite the design data for anything else, even just to smooth out the facets a bit. That's why I reworked the whole thing as "OpenSCAD Chess" (Thing #585218), which is much more amenable to going in and tweaking parameters. Even then, some things like the queen's crown were hard enough to model that I just worked with the STL file, and then imported the STL into OpenSCAD. The knight, of course, is all just STL mesh manipulation.

Feel free to make any changes you like, and post them as remixes!

Looks pretty good!

I'm thinking about just adding a bit of plastic in-between the snout of the knight and his body. Removing the need for a "removable" support all together! This will look a little bit... not right... but it will work nice and perfectly in my situation!

Okay, I printed the knight with support, and while my MakerGear M2 handled it, the chin was a bit iffy for a few layers. So I reduced the gap by half or more. I think that should be enough to eliminate any printing issues.

The gap is supposed to be appropriate for the distance between a part and support, which should be separated by a gap so that the filament isn't pressed firmly down into the support layer. That should make the support layer easier to remove. However, I admit that I have not printed this exact structure yet. However, I did print an earlier version of it that had a similar gap, and the part printed correctly and the support structure broke away easily as planned. Give me a few days and I will print a sample part and see how well it works.

This is a nice looking set. I like the idea of the built-in support for the knight, but I see there is a small gap between the support and the low point of the chin. Have you considered adding a version with that gap eliminated?