pic: Team 1574's Teaser

[Guy_E]

loading photo ...

[Aren_Hill]

ooh ooh an arm joint? that was too easy lol looks like a nice solid mount to the arm though

[EricH]

Originally Posted by Aren_Hill

ooh ooh an arm joint? that was too easy lol looks like a nice solid mount to the arm though

More specifically, I think it's a Beach'Bot style arm--a mast with a single joint at the top of the mast.

[Ericgehrken]

Great arm design! The beach bots did amazing with that style arm.

[Astarties]

what motor are you using to operate the arm?

[Guy_E]

What motor we're using is still a top secret, but when we'll have it ready I promise to upload a photo of it. Im sure you'll be impressed

[waialua359]

my guess is a window motor or possibly FP with the right ratio setup. It looks like a 50ish tooth sprocket for maybe a 5 to 1 ratio. Our ratio is a little higher with the window motor, which moves our arm with no strain on the motor. When we had a 4 to 1, torquewise was fine, but the speed was just a little too quick and jerky.

[EricH]

Originally Posted by waialua359

my guess is a window motor or possibly FP with the right ratio setup. It looks like a 50ish tooth sprocket for maybe a 5 to 1 ratio. Our ratio is a little higher with the window motor, which moves our arm with no strain on the motor. When we had a 4 to 1, torquewise was fine, but the speed was just a little too quick and jerky.

If it's a true Beach'Bot arm, FP, two-stage reduction. You'd probably be right for the upper stage.

[=Martin=Taylor=]

Originally Posted by EricH

If it's a true Beach'Bot arm, FP, two-stage reduction. You'd probably be right for the upper stage.

No, its most definitely a leg.