Has anyone driven over the scoring platform with the KOP AM14U2?

[marccenter]

Has anyone driven over the scoring platform with the KOP AM14U2?

Was there any interference, a small amount, a significant amount?

[JohnFogarty]

The wheels provided along with the base frame geometry makes it scrape the platform a lot when climbing over it. I'd use 6" wheels if you want better clearance.

[ttldomination]

Originally Posted by marccenter

Was there any interference, a small amount, a significant amount?

As per the CAD, you would bottom out pretty hard. Even if you managed to keep moving, the scrape would be severe.

Originally Posted by JohnFogarty

The wheels provided along with the base frame geometry makes it scrape the platform a lot when climbing over it. I'd use 6" wheels if you want better clearance.

Can confirm; 6" wheels will let you climb over and straddle the bump in the long configuration.

- Sunny G.

[billbo911]

Have you run the numbers on a 6 wheel drive, drop center of .125", with 4" wheels?

I believe crossing the platform will be fine, but straddling it will still hang up.
The same would be true of 8 wheel drive, with 4" wheels, if I understand this correctly.

Again, all of these answers will be dependent on the wheelbase and track combinations.

[nathannfm]

Has anyone tried it with an old Mecanum robot?
How about one with 50LB cantilevered off of a side?

[Jacob Bendicksen]

Originally Posted by nathannfm

Has anyone tried it with an old Mecanum robot?
How about one with 50LB cantilevered off of a side?

We tried it with an old 6" Mecanum robot with 40-50 lbs on one side of the drivetrain, and it barely bottomed out on the edge. Its control board, however, is dropped a little, so from what I've seen, 6" Mecanums should work. Strafing isn't great with that kind of off-center weight, though.

[ttldomination]

Originally Posted by billbo911

Have you run the numbers on a 6 wheel drive, drop center of .125", with 4" wheels?

I believe crossing the platform will be fine, but straddling it will still hang up.
The same would be true of 8 wheel drive, with 4" wheels, if I understand this correctly.

Yep, ran the sketches; this was right.

And since the 8WD will be just as wide as the 6WD, you're gonna bottom out when you attempt to strafe.

- Sunny G.

[nathannfm]

Originally Posted by Jacob Bendicksen

We tried it with an old 6" Mecanum robot with 40-50 lbs on one side of the drivetrain, and it barely bottomed out on the edge. Its control board, however, is dropped a little, so from what I've seen, 6" Mecanums should work. Strafing isn't great with that kind of off-center weight, though.

Did you notice a problem with driving due to the 2 different CoF?

[Logan Byers]

https://www.youtube.com/watch?v=2ZbCseo-_ks

http://files.andymark.com/AM14U%20Be...izing_Rev2.PDF
This is from the AM14U, but the hole pattern is identical to the AM14U2.

[Jacob Bendicksen]

Originally Posted by nathannfm

Did you notice a problem with driving due to the 2 different CoF?

We couldn't get it going fast enough to see a significant problem. Strafing was awful, but it went more or less straight. It did tend to veer off to one side once all four wheels were on the plastic, though.

[cad321]

Originally Posted by Jacob Bendicksen

We tried it with an old 6" Mecanum robot with 40-50 lbs on one side of the drivetrain, and it barely bottomed out on the edge. Its control board, however, is dropped a little, so from what I've seen, 6" Mecanums should work. Strafing isn't great with that kind of off-center weight, though.

Were these tests performed on the plastic scoring platform or was it done on a wooden one?

[Jacob Bendicksen]

Originally Posted by cad321

Were these tests performed on the plastic scoring platform or was it done on a wooden one?

It was HDPE, the same stuff on the actual field element.

[mrnoble]

We used our 6" Mecanum drive base over the bump last night and this morning. No issues with scraping, but if you go with Mecanum plan on not going over the bump without issue unless you don't have an approach angle greater than about 10 degrees. Once one of the wheels lifts off, it will have difficulty moving at all.

We are also experimenting with WCD, 4" 8 wheels. Unless the belly pan height is increased, I guarantee trouble with high centering.

Not saying that either of these options aren't viable. It shouldn't be too much of an issue to build to meet the constraints, and drivers just need to practice.

[skottmorris]

Anyone considering the AM 4" mecanum wheels? I'm assuming this would not make it over the scoring platform at all because it would be too low.