Fisher Price Motors

[Spirator]

With the Fisher Price Gearbox, how would you attach it to a drum, any kind of drum as we we looking at a belt, but would that be stable enough? We'd like to see what the others are doing,

3132.

[artdutra04]

If you have access to a milling machine, the easiest way to attach to the output hub of the FP KoP gearbox is to mill an octagon-shaped aluminum plug that fits between the plastic flanges. Then just wrap a hose clamp around it, and you're done. You can either broach the aluminum plug for a live axle, or drill a hole pattern into it for dead axle applications (such as if this octagon shaped aluminum plug was bolted directly to your drum).

Here's a photo from the construction of our 2008 robot, which used this octagon aluminum plug. You can click through to the full resolution photo to see it in better detail.

[Spirator]

I can't believe I didn't think of that before. I'll ask our lead mentor if he has acess to a milling machine and we'll proceed from there.

[silv940]

Originally Posted by artdutra04

If you have access to a milling machine, the easiest way to attach to the output hub of the FP KoP gearbox is to mill an octagon-shaped aluminum plug that fits between the plastic flanges. Then just wrap a hose clamp around it, and you're done. You can either broach the aluminum plug for a live axle, or drill a hole pattern into it for dead axle applications (such as if this octagon shaped aluminum plug was bolted directly to your drum).

Here's a photo from the construction of our 2008 robot, which used this octagon aluminum plug. You can click through to the full resolution photo to see it in better detail.

I would recommend using a couple machine screws that go through the plastic into tapped holes on the octagon aluminum hub. Then wrap a hose clamp to make sure its secure. . The hose clamps slipped on one of our robots.

[ChrisH]

If you can't find a mill, mark the aluminum plate carefully with the octogon and cut it out with a band saw. Leave it slightly oversize and clean up the sides with a file. It does not have to be all that precise to work.

You might also be able to get the part that mates to the white "crown" from a place that sells FP parts. The part is called a "jeep driver" and is pretty inexpensive. The jeep driver makes a pretty good drum by itself and, at least with some year's motors, was just about exactly the right size to make a drum for a robot lifting winch. The jeep driver used to be in the KOP so you might find a picture if you look though the old docs.

[lynca]

Originally Posted by Spirator

With the Fisher Price Gearbox, how would you attach it to a drum, any kind of drum as we we looking at a belt, but would that be stable enough? We'd like to see what the others are doing,

3132.

Have you considered a DOUBLE DOOZY


We attached a Spool to the FP gearbox in 2008,
http://2008.discobots.org/node/33