Thingiverse
Models Creatures

Brabeast

Gyrobot
5400
Downloads
5389
Views
Published on February 7, 2013

Description

Based upon the famous walking Strandbeest from Theo Jansen ( strandbeest.com ). This is a modular clip together system that is FDM printer friendly. No support required.

I have curved the links in an organic way such that the shape of the leg section looks ahem "bra" like, hence the name.

See video : youtu.be/PdvfL4GfMk0

gyrobot.co.uk
facebook.com/gyrobotuk

Instructions

14/02/2013 EDIT : Increased SPACER.stl length by 0.5mm, thought the legs were a little too loose as a result.
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)

Assembly Instructions:

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!!!
Tags
This Thing has no tags.
Report as inappropriate

You must be logged in to post a comment.

Andychn on March 29, 2013 said:

Assembly was way too difficult. The weak point is the pair of parts that are the cranks. A little tiny hole holds them together. Too bad.

Gyrobot on March 31, 2013 said:

See new edits for increased crank and hexagonal hole diameters. Hope this works for you, let me know?
Cheer, Steve.

Gyrobot on March 30, 2013 said:

Hi, thank you for the feedback, I did worry about this connection, but it has been robust on my model therefor I uploaded the design. Let me increase the size of the hexagonal hole and key. The instructions mention souperglew to keep these together, have you tried this option? I agree assembly is tricky and fiddy but in my view that's part of the model making challenge. Thanks, Steve

Andychn on March 2, 2013 said:

A VERY fun build and a good result. GREAT JOB!!! Thank you!
To really see it walk it will need a large drive gear to get the needed torque as well as an overhead gantry for a propulsion device.

Gyrobot on March 2, 2013 said:

I have the fan drive now working with a super high ratio in line planetary gearbox fitted. This will be uploaded in the next few days. Watch this space. Do you have any pictures?

pawaller on February 27, 2013 said:

Fantastic, thank you! This will be my next build. Has this model been successfully printed out using PLA?

Gyrobot on February 27, 2013 said:

It certainly does work in PLA see photos, however I have a sneaky suspicion that individuals printer calibration will decide whether the mechanisms are sloppy or tight. So I expect a raft of complaints as other printers may have problems. If its too tight, scale the pins down a tad.

adamrw91 on February 20, 2013 said:

wheres the windmill attachment?

Gyrobot on February 21, 2013 said:

It's in design, I have prototyped one version which sort of worked but it needed better gearing. I have now moved onto another version. Watch this space.

ComradeQuiche on February 20, 2013 said:

Is that a rendering superimposed onto the build platform?

Gyrobot on February 20, 2013 said:

Quite right Comrade. I render my models in CATIA with a photo of my build platform behind. Brings a splash of green to the Thingiverse sea of blue.

Lenn on February 9, 2013 said:

Tried printing it but it has problems:-2 x OUTER LINK (YELLOW) only has one in the PLATE_PRINT_ONCE.stl
2 x OUTER LINK (YELLOW) and 2 x LEG (MAGENTA) in PLATE_PRINT_ONCE.stl have holes much to small to fit the pins, the holes appear to be sized to fit the 1 x BEAM (DARK GREEN) shafts.

Gyrobot on February 9, 2013 said:

Hi,

Thank you, I have added an extra OUTER LINK (YELLOW) into the PLATE_LEG_SECTION.stl

I have increased the hole diameter in the LEG (MAGENTA). This was my fault, after I had printed out my first leg section, I thought the pins may be a little small and fiddly for some to print, therefore I increased the pin diameter and all the holes, so I thought, oops!!!!

However I believe the hole diameters in the OUTER LINK (YELLOW) to be correct, is it assembled the correct way round, The diameters should be 6mm with a diameter 7 countersink on one side?

Many thanks for letting my know your issues, overtime I'm sure these teething problems be fixed.

Crypto on February 8, 2013 said:

Thanks for doing this! It's been on my to-do list for quite a while. My MB is still down though for repairs. I'll print it soon though!

Collections

View all
Want to make
by boston09
Things to Make
by mateusps
Robotics
by Bryscus

Remixes

Made

View all

Liked by

View all

License

Brabeast by Gyrobot is licensed under the Attribution - Share Alike - Creative Commons license.

More from Gyrobot

More from Creatures

⇪