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... the chair outlines would need to have the proper corner radii. It's a lot of extra calculation with 4 chairs on most crossing timbers, but it hasn't impacted too much on the screen response for full track plans. Obviously you would switch the chairs on only for the final printed templates, they are not needed while track planning. It's fiendishly complex. For example the REA bridge chairs (L1) have a larger corner radius (1.3/4 ") than ordinary S1 chairs (which have 1" corner radius): 2_161458_330000001.png And GWR slide chairs have a full semi-circular end on the inside, for example. Templot does all the positioning and rotating of the chairs, and calculates where bridge chairs are needed to fit the space. For 3D printing it needs to be in the DXF file. So this is where I've got to: 2_161458_330000000.png Just the chair bases so far. The next job is to change the rails to a proper bullhead section. Then add the keys, and the chair jaws. And the chair screws. There ...
... Jun 2020 23:51 from: Martin Wynne PHP wrote: On the dxf export file, is it possible to mark the chair positions? It seems this is part of the 3d setup so is this temporarily switched off? Hi Phil, There isn't really such a thing as "the chair positions". It's a complex subject, and varies with the different prototypes and periods. I do have an ongoing, but currently stalled, project to show REA bullhead chairing on the 2D templates (and hopefully also GWR): 2_161458_330000001.png 2_301200_590000000.png 2_301256_010000000.png It's a long way from being ready, and got more complex after I obtained a 3D printer -- I'm hoping to get Templot to export the files needed for direct 3D printing of track. 2_061704_070000000.png Unfortunately I don't get much time to work on it, my computer time being mostly taken up in supporting the current Templot functions for users. For example I recently spent several days on a re-write of the make diamond-crossing at intersection function. So don't hold your breath for chairing in the DXF ...
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