Would that be the water game, the flying game, or the Martian game?
Why would you go camping to design the drive train… wait a second it’s a GAME HINT! :yikes:
These will have a thrust roller bearing at the top that can easily handle the load these’ll see, pushing up against a flat plate bolted to the frame, at the bottom a delrin or UMHW right will encircle the disc of the module.
Dillon does have a frame cadded up, but as of now we do not plan on completing a full prototype for money reasons. We will on the other hand be putting this on a setup with an old chassis and 2 casters and seeing how it lasts durability wise at the very least.
Have you looked into using Teflon sheets? That stuff is pretty awesome compared to UHMW :rolleyes:
ahem, If you do use these wheels, never spin them on carpet. The tread kinda leaves in a unelegant fashion (ow).
We’ll be pursuing colsons and also the prospect of making our own
Not pretty :ahh:
I’m thinking Baltic Birch wheels with riveted Roughtop tread for production, or whatever wood you can find for prototyping in the meantime. You could make them whatever diameter you wanted to, however wide you wanted to, and it would be one solid wheel.
This also shows the rest of us that the BB wheels probably wouldn’t hold up very long in an overall FRC season for a defensive-type bot.
Can you guys elaborate on your test setup for this??
Thanks
Brando
What durometer of polyurethane were you guys using? That looks soft enough that you could just peel it off if you wanted…
I believe the orange colored urethane from banebots signifies a shore 30A durometer.
//its shore 40A see below
probably around 80lbs of weight on module, cordless drill powering it
Held the setup still and spun the wheel on carpet seeing how the wheels would handle it
after around 2 seconds stopped and this is the result
“Black PP Core, Medium Orange 40 Shore A TPR Tread” From the BaneBots website.
I wonder if the Blue 50 Shore A would do any better. Also, isn’t 80 pounds a but much for one module?
Yeah it is, but even then seeing it die in this fashion convinced us to no longer mess with the banebots wheels.
Kinda a safety factor test and they failed
Which Colson wheel do you plan on trying out?
2"dia by 7/8" wide colsons
Thanks to all the folks from 1625 for showing everyone these pictures. Each new image brings new and “wonderful” surprises - I love it!!
Its not last years swerve module, its one of the original prototype tubes.
WOW! How practical would that be? Considering the wheels shred easily… How did you guys get the chain length right on?
(From what I can see the 25 chain look pretty taught…)
It’s not terribly hard to do if you have CAD. You can find the size of a link pretty easily, giving you a unit that we’ll call one link. You find the exact wrap around the sprockets, which gives you a certain distance (x links, we’ll call it). Then you find the exact distance between the wraps on both sides and get another distance (y links). Add x and y and you get the number of links needed. If there is a fraction less than 0.5, add a half-link (special link); if there is a fraction between 0.5 and 1.0, add one link. Make your chain that number of links long, put it on, and you shouldn’t have to worry about tensioning for a while.