19.06.2022, 23:53
RoboMaster S1 - DIY by t4obrien - Thingiverse
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RoboMaster S1 - DIY
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by t4obrien July 18, 2019
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https://www.thingiverse.com/thing:3753393
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Summary
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2019.07.18 Printed, and it works
spectacularly! I've got one fully
compatible spare wheel. The 'wheel
hub' is the only hard part to print (lots
of overhangs no matter how you do it)
so I've added designed-in supports.
Refined the other designs a fair bit too.
1/4
19.06.2022, 23:53
dji, dji robomaster, Mecanum, robitics, robot,
rover
License
RoboMaster S1 - DIY by t4obrien is licensed
under the Creative Commons Attribution license.
RoboMaster S1 - DIY by t4obrien - Thingiverse
This thing is so cool. So satisfying to
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have every
roller
click perfectly
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place on the first prototype print.
2018.07.19 Heavily updated the hub to
print 180º flipped from before. Allows
for some needed geometry that was
missing before. Prints great!
I've now switched to printing
with a 0.6mm nozzle for a large
improvement in print speed and
strength. As a side effect the
added-in supports become small
to slice/print since I'd designed
them for single-width 0.4mm
nozzles. If you want to use
anything but a 0.4mm nozzle
you'll need to edit the 'printable'
tab in the OnShape, I made a
variable just for such things.
The new Robomaster S1 is out, and it's a pretty freaking
incredible design. BUT there aren't any spare parts
available!? I'm fixing that with with my open-source S1 CAD
modeling.
Progress / completeness
So far I've recreated my favorite part of the design: these
incredible mecanum wheels. They're 12-wheel, 45º, and
96mm in diameter. They've got a unique internal rubber
dampener that effectively gives this robot freakin'
suspension.
More to come. Leave a comment with what you'd like to
see.
Using this in other robots
If you'd like to use one of these wheels for your own system
all you'll need to do is modify the wheel hub component to
fit your motor, should be super easy.
CAD design source
I've designed this in onshape. Here's the public document,
anyone can fork and extend the design free of charge.
(here's the page to get a free account, they keep it hidden
from their main site)
Follow along / community
There's a fledgling subreddit, r/RobomasterS1, join-in over
there and follow along!
https://www.thingiverse.com/thing:3753393
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19.06.2022, 23:53
RoboMaster S1 - DIY by t4obrien - Thingiverse
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With the new 'printable' files nothing special is needed. No
supports, no rafts, no brim. I've even rotated them down
flat, they're ready to go!
Materials
"wheel_hub_dampener" should be printed in
something super squishy. Ninjaflex, or TPU. Try
printing with two walls and very minimal infill to
keep it as flexible as possible.
All other parts: PLA works great. Nylon or PETG
would be stronger but so far I've not had problems
with impacts and stresses with simple PLA (and it's
so easy and fast to print).
Hardware
Everything is designed to work with DJI's hardware,
you can actually look at their manual for all the
specs.
This wheel uses the "T2 Screw" to hold the two
halves together.
Rollers
The rollers are designed to be printed in half, and I've left a
0.5mm thickness slice to add some rubberized tread. Two
methods should work:
Heatshrink tubing
Rubberized paint, like 'plastidip' (amazon $5 spray
can)
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