Anysize Technic Strut

These are custom size links/struts/triangles which are compatible with lego techic connectors. You can use them to build custom linkages. I have included the Jansen Leg linkage dimensions with the intention of printing a walker.

You can annotate the ends of the links with letters, which really helps with construction.

Be aware that the settings on the Slicer are really important for getting the connectors to fit, I would recomend a few test prints before you try anything big.

For an easy ride I would start by editing the Jansen Leg file. It is worth noting that the points of the trinagle go A->B->C clockwise. l1 is A->C, l2 is A->B and l3 is B->C.

If you want to dig deeper then you can try and decode lego_beams.scad I had a look; and even though I wrote it (so many years ago) it was somewhat cryptic. But in the sprit of "if it ain't broke don't fix it" I have left well alone for now.

BlockLetters.scad has letters that can be cut out (no inner shapes). rodsandholes.scad has the code for corrected shapes for building rods and cutting out holes.

Print Settings

Printer:

Marlin

Rafts:

Doesn't Matter

Supports:

No

Resolution:

0.4mm thread width

Infill:

NONE

Notes:

Took ages to get the settings right and may need a bit of fiddling with the o parameter in lego_sizes and the NozleDiameter and LayerHeight on your slicer. You can get 4mm thread width from a 0.3 Nozzle and 0.1 layer height which is what I used.

It is important not to use infill, the extra plastic tends to bloat the print and the connectors do not fit in.

Category: Construction Toys