by Gyrobot, published
I have curved the links in an organic way such that the shape of the leg section looks ahem "bra" like, hence the name.
If you are having trouble with the cranks, try this re-mixed version from Vivifyer: thingiverse.com/thing:207351
See videos :
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I just uploaded a new version of the leg section with oversized cranks. --> http://www.thingiverse.com/thi...
seems to work quite well, as I too had trouble with the original design. Hope it works for you as well.
Amazing design, since ordering my 3d printer 18mths ago I have always planned on printing a Strandbeest.... However for me this model was Infuriatingly difficult (impossible) to assemble! I wanted this to thing to work so badly, but I have spent days printing all the parts (ABS at .1mm layers on Solidoodle2 with tweaks) and assembling each leg section (using my replacement leg pins which work a treat) only to find I cannot for the life of me get the hex bits that make up the camshaft to join reliably. I have spent hours trying to squeeze them on and the best I got were two connected (ish) before they fell apart while trying to connect the next one. (I am printing the 'plate leg section' using the new 'improved' design). I tried using PLA but the results were 10x worse (my printer isnt really tuned for PLA). I might come back to it and try a drop of super-glue on each hex join, but for now it's going on the backburner as it's annoying me too much. :)
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03/03/13 EDIT : Uploaded the Fan Drive Module thingiverse.com/thing:56542
03/03/13 EDIT : Uploaded YouTube video, see description.
31/03/13 EDIT : Due to user feedback I have increase the crank shaft diameter. Updated CRANK_ARM, CRANK_SHAFT, UPPER_LINK, INNER_LINK and PLATE_LEG_SECTION.
Printing instructions :
1 x PLATE_PRINT_ONCE.stl
1 x PLATE_LEG_SECTION.stl rinse and repeat for however many legs you want to fit onto this beast (3,6,9,12 etc).
Full Bill of Materials (separate stls included):
1 x END BEAM (DARK GREEN)
1 x CRANK SHAFT ADAPTER (BLOOD RED)
(For each leg section, rinse and repeat) :-
1 x BEAM (DARK GREEN)
1 x CRANK ARM (LIGHT GREY)
1 x CRANK SHAFT (LIGHT GREY)
2 x INNER LINK (DARK BLUE)
2 x LEG (MAGENTA)
2 x MID LINK (LIGHT GREEN)
2 x OUTER LINK (YELLOW)
8 x PIN (WHITE)
2 x SPACER (DARK GREY)
2 x TRIANGLE BRACE (LIGHT BLUE)
2 x UPPER LINK (LIGHT RED)
Please assemble according to BRABEAST LEG SECTION.stl and BRABEAST.stl (view in Thingiview)
Note: The crank shaft angle for each leg has to be indexed according to the previous leg's crankshaft angle. This is achievable by the hexagonal crank shaft hole clipping onto the previous leg's hexagonal shaft. You can either index it 120deg for a short beast or 60 deg for longer beasts.
Some tips : Maybe a dab of glue may be required depending on your printer calibration and clipping together of leg sections. You can scale the pins down if they are too tight for you.
This is still a work in progress because I am busy printing off more leg sections to assemble this beast together. I will design a series of modular add ons, fan drive, hamster ball drive etc, so watch this space!!!
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