pic: Concept 6W Drive Train

[AdamHeard]

Originally Posted by Infinity2718

Not really redesigning last year, just adding it to the considerations.

What didn't work out well on the framing for bumpers on this?

Hard to tell from just a top down picture, but assuming the supports between the wheels were at the correct height to support the bottom of the bumpers this should've worked out decent.

Was it a mounting issue? Did they have too much slop/play? Was it a once piece bumper?

Were you happy with the drive otherwise, and are just trying to solve the bumper issue?

[z_beeblebrox]

AdamHeard, where can I find good pictures or descriptions of the bumper and bumper mount design that you guys use?

[Deke]

Originally Posted by AdamHeard

What didn't work out well on the framing for bumpers on this?

Originally Posted by Infinity2718

By the end of the season the bumpers were all smashed in at the top from no framing support and became more difficult to install, that's my beef with it.

Originally Posted by AdamHeard

Hard to tell from just a top down picture, but assuming the supports between the wheels were at the correct height to support the bottom of the bumpers this should've worked out decent.

Was it a mounting issue? Did they have too much slop/play? Was it a once piece bumper?

Were you happy with the drive otherwise, and are just trying to solve the bumper issue?

The mounting could have been better, we used wing nuts with bolts through the bumper. It was a one piece bumper.

I have a handful of minor complaints: center live axle getting bent and wobbly a few times (took a while to replace, the dead axles performed better imo), bearing block plates hard to get at to loosen, gear box cantilevering off a few bolts seemed sloppy (, tensioners added construction and wheel maintenance time, if we got tipped the drive would sit on its frame edge and lose traction. Other than that and other things noted in this thread, it was pretty sexy.

[Brandon_L]

Originally Posted by Infinity2718

Center live axle getting bent and wobbly a few times (took a while to replace, the dead axles performed better imo)

Usually you'd use a high strength aluminum alloy here or even steel, what did your team use?

Originally Posted by Infinity2718

bearing block plates hard to get at to loosen

This seems to be a result of where you're running your chains from. On most of the WCDs I've seen the chain runs are actually on the inside of the robot with the chains coming off a sprocket inside of the gearbox itself. Of course you can really do it any way you want, but as a result of sprockets on the outside yes your plates will be more difficult to get to.

Originally Posted by Infinity2718

gear box cantilevering off a few bolts seemed sloppy

What about it seemed sloppy?

With all that being said, 1x1 drives are perfectly valid. The only thing I would comment on is that some of your upper structure seems unnecessary. Maybe you're using the outer upper level for bumper supports, which is fine, but the inner upper level that holds up the gearbox could probably be replaced with something like this. Depends on what you were trying to achieve with it.

Also, I'm not sure if I would trust those vertical gussets you have going on with impacts. But I could be wrong. Who knows.