MechEngineerMike

Thanks, I used solidworks.

FYI to anyone thinking about making this, Ive purchased those 61bit LED wheels from two different listings on banggood and in both cases they split up the rings into separate individual rings...! Making it way more work to wire & assemble this device than it seems.

HI Pablo, cool robot, I love the idea of use these in schools! I made a sumo robot too and I just checked and we happened to use most of the exact same hardware! So I thought Id let you know that you could probably use my code too so you can show your students how a totally different programming paradign will yoield different results. (My program is a state machine) https://www.instructables.com/id/SimpleSumo-Educational-Fighting-Robots/

This electric motor has full torque at 0 rpm so no gearbox necessary. Its electric motor- sprocket-chain-sprocket - wheel

If you feel you are unable to use a device safely then don't. In practice there is never any slack to wrap around limbs because the line is so short, the spring is strong, and it doesn't have a thumb button to lock the spool.

Solidworks

Thanks and done!

Im sorry but I do not.

HI, yes I had to move on. This project was fun and I have left all the documentation out there for people to make use of and enjoy. But it was not the financially profitable experience I had hoped for, so I needed to continue developing new products.

I have not done any simulations but Im sure the most likely mechanical failure mode is the fishing line breaking or the pin that holds the bearing shearing off. The force on the pin is almost entirely transverse shear and the pin is 8mm in diameter, but still I think its adequate for use on small game if your printer is good and the layers adhesivs is strong.

This is quite a hack! I would love to see this made from scratch tho, so it would be more replicable

FYI @Instructables, I think something is not working correctly with the PARTY CHALLENGE. When I submit my entry it doesnt 'stick' and I get no notification that I attempted to enter like I usually do. It also only has 4 entries with 18 days left to go which suggests others are having trouble entering too. https://www.instructables.com/contest/party2019/

Thanks! I have a maker license for Solidworks at home and i love it.

It refers to the settings you select when you prepare an object for FDM 3d printing. Perimeters are the exterrior layers of a print and they have an outsize effect on part strength relative to infill. I suggest using at least 3 perimeters when printing gears.

But THEN what would you make? Ive thought about things of that nature but CNC lathes are just not as useful as CNC mills.

This is a great design & well documented to boot! Congrats on the big win of your new laser cutter!!

Wow this looks great!!

Loks great and a well documented instructable, love it!

I dont think thats much different that what I used, but I wouldnt go smaller.

1. Agreed, mine is complicated but I didnt see how to reduce part count at the time.2. The 20v signal is just for keeping the relays triggered, it does not interact with the 9v signal. 3. >>>> Your updated design is very clever, I only see advantages! <<<<4. Nowadays there is another type of product available to address the core problem. I know a lot of 3D printers who use these self activated fire extinguishers designed for stovetops. https://amzn.to/2PisEMg

Thanks! I live by the KISS motto so much I probably should get a tattoo lol

Awesome thanks!

Great work, the last 10 seconds of that first video had me rofl

Looks great and its clear from the code how much work went into this, voted!

Wow thanks!

Update- I experimented with using a file & a break-in procedure and now they spin even better!

Great ideas all around!

Thanks! Yes a slippery surface like glass is an issue, especially when the geneva wheel engages. But it is a surprisingly free spinning device and for paper or countertops it works great! I thought about adding a rubber o-ring to the outer rim but I wasn't sure it was worth it. (BTW 3D Printed TPU is surprisingly fairly slick because it has to be extrudable!)

Thanks! I just uploaded individual stl files. I thought it was nice to have together because they all have the same print settings.

Thanks! Solidworks

Ha thanks!

Simple but useful! As a nail-biter i appreciate this :)

Wow, I was about to leave a different comment until I saw this. Well Kudos to both of you anyway. I've had a similar idea to cut wire but your implementation is much better, great work!!