4265's Off Season Octanum

[Nemo]

That's a pretty serious drive base! I guess the offseason is the perfect time to max out a drive train for a team that has that itch.

You've listed just two speeds. Is the gearing from the 6" to 4" wheels setup to keep the two types of wheels at the same speed? If not, then you really have a four speed drive.

In my mind, one of the benefits of octocanum is that you don't need shifters. It's already providing the benefits of a two speed if you gear the Colson wheels slower than the mecanums.

[Dad1279]

Originally Posted by Nemo

....
In my mind, one of the benefits of octocanum is that you don't need shifters. It's already providing the benefits of a two speed if you gear the Colson wheels slower than the mecanums.

That is also what 1279 found in 2011(Logo Motion) with a reduction to the traction wheels, and 4 Cims+4 775s, our drivetrain had tremendous pushing power. 'Low gear' was traction wheels down, high speed was on mecanums.

We also hinged on the traction wheels like you did, for strength, but put the traction wheels at the extreme front and rear for better stance when pushing. With the 8 motors and gear reduction, we had no problem turning on carpeting, even with conveyor traction belting on wheels.

Very nice Cad work and machining. Is the cylinder mount a cast part or machined?

[tag_groff]

Originally Posted by Dad1279

That is also what 1279 found in 2011(Logo Motion) with a reduction to the traction wheels, and 4 Cims+4 775s, our drivetrain had tremendous pushing power. 'Low gear' was traction wheels down, high speed was on mecanums.

We also hinged on the traction wheels like you did, for strength, but put the traction wheels at the extreme front and rear for better stance when pushing. With the 8 motors and gear reduction, we had no problem turning on carpeting, even with conveyor traction belting on wheels.

Very nice Cad work and machining. Is the cylinder mount a cast part or machined?

Thank you. The cylinder support was a machined block

[tag_groff]

Originally Posted by Nemo

That's a pretty serious drive base! I guess the offseason is the perfect time to max out a drive train for a team that has that itch.

You've listed just two speeds. Is the gearing from the 6" to 4" wheels setup to keep the two types of wheels at the same speed? If not, then you really have a four speed drive.

In my mind, one of the benefits of octocanum is that you don't need shifters. It's already providing the benefits of a two speed if you gear the Colson wheels slower than the mecanums.

the way that it is geared, the traction and mecanums are 1:1. but if you factor in the efficiency loss with the mecanums, the slightly larger radius makes that up, making the speeds of both modes about equal. The advantage shifters give, is that we have all the pushing power in low, but in high we can still go 21 ft/s in traction.

[cadandcookies]

You might want to export it as a .step instead of providing the raw file. STEP files tend to import better into Creo/ProE and Inventor, as they aren't a proprietary format.

Very cool modelling though. I like the combination of sheet metal (?) and tube parts.