pic: GBX-116, Drill press swerve drive

[asid61]

loading photo ...

[Arpan]

This looks really, really impressive. I've wanted to make an easy-to machine swerve for a while now.

I'm not sure if I would use sheet metal for the caster box. It's weak across the joints, so I'd be worried about my box doing a parallelogram. Cutting it from extrusion would be much stronger.

17 fps seems fast for a 4-cim. It'll accelerate okay, but I'd be worried about blowing breakers if you hit something.

12-14 theoretical might be more reasonable.

Pleeeeaaaaaase release the CAD for this. I really want to check it out!

[asid61]

It is very easy to change the speeds via the large top sprocket.
I will release the CAD soon, once I think it's complete. Perhaps later today.
Thank you!

[Oblarg]

You're really going to have an awfully hard time getting good enough tolerances for gear meshing with just "a good eye and a ruler."

[Arpan]

Originally Posted by Oblarg

You're really going to have an awfully hard time getting good enough tolerances for gear meshing with just "a good eye and a ruler."

Yeah, I'd imagine this would have to be milled. Or at least the caster box.

[nathannfm]

Originally Posted by asid61

due to the lack of commercially available 3/8" hex bore sprockets. Hopefully Vex or Anymark will stock those eventually.

You feel my pain.
This is why MOE went away from Vex bevel gears on our final version. This, with This (375 hex hub) is the best we were able to find, its awkward but it might work better for you. I dont feel comfortable doing gear meshing on a drill press.

Also, what's that random gear on top for?

[asid61]

Originally Posted by nathannfm

You feel my pain.
This is why MOE went away from Vex bevel gears on our final version. This, with This (375 hex hub) is the best we were able to find, its awkward but it might work better for you. I dont feel comfortable doing gear meshing on a drill press.

Also, what's that random gear on top for?

I considered those, but the width held me away. Looks like I'll have to switch over.

The random gear on top is because of the lack of 3/8" hex 1.875" bolt circle hubs, but AM has them os I'll switch over. I was hoping to be able to buy everything from just Vex, but it's fine.

[page2067]

Very nice.

I thought the random gear on top could be used for the encoder.

[asid61]

Originally Posted by page2067

Very nice.

I thought the random gear on top could be used for the encoder.

It could, maybe. But I would rather put an encoder on the CIM for simplicity.

[asid61]

Does anybody know if banebots gearboxes come with the long screws to put them together, or do you have to buy those seperately?

[Gdeaver]

They come with the screws. However, If you use some 6-32 hex stand offs and 6-32 screws, you can face mount it. Also this allows the motor to be replaced without total removal of the trans.

[asid61]

Originally Posted by Gdeaver

They come with the screws. However, If you use some 6-32 hex stand offs and 6-32 screws, you can face mount it. Also this allows the motor to be replaced without total removal of the trans.

you have a picture of this method? Do you mean putting standoffs on the face of the gearbox?

[Gdeaver]

Only picture I could find showing them.

http://wiki.team1640.com/index.php?t...IX_Drive_Train