help! is this bad?

[Matt Adams]

Originally Posted by Mr. Van

Once again, I will ask an engineer to back me up on this...

It can be a real problem having three bearings on a single shaft.

It is very, very easy for them to bind up! Avoid this at all costs unless you have a flexible coupling in there somewhere.

The kit shaft is very strong. A cantilevered sprocket should be no problem as long as the sprocket is close to the bearing.

Will this be the end of the world to have it cantilevered... no. Optimal? Not really.

The easy answer to whenever you have 3 bearings in a line... what is the middle one for? Can't you just remove it? Since they're bearings, they must be lined up on rigid surfaces. It should be as simple as running the sprocket and wheel in between the two bearing and mounting blocks...

I hope this helps.

Matt

[greencactus3]

Originally Posted by Matt Adams

Will this be the end of the world to have it cantilevered... no. Optimal? Not really.

The easy answer to whenever you have 3 bearings in a line... what is the middle one for? Can't you just remove it? Since they're bearings, they must be lined up on rigid surfaces. It should be as simple as running the sprocket and wheel in between the two bearing and mounting blocks...

I hope this helps.

Matt

yes, it is possible, only if we choose to do that, the bearing to bearing will be almost 12 inches.
that or a cantilever then.
which should i do

[Al Skierkiewicz]

Without seeing your device up close, I would think it would be OK. There is always a source of trouble in this setup with implementation. The pillow blocks work well for slightly misaligned shafts but the torque on the wheels and the sprocket tend to try and drive the blocks out of alignment. The surface to which they are mounted and the mounting hardware must be sturdy enough to prevent movement of the assembly. If the blocks move, the chain will loosen, the wheels will not run true or they may even begin to drag on the robot body. You are using the big shaft right? I don't think you will be able to bend that without doing some harm to other parts of the drive.