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Re: pic: GUS Team 228's Prototype Sheet Metal 6WD Chassis
I was wondering if you could post a picture of the hub you are talking about?
Bruce |
Re: pic: GUS Team 228's Prototype Sheet Metal 6WD Chassis
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![]() This is just a very quick CAD I made from memory of what I did to mount Colsons on the 05 and 06 robots I helped with. The inner hub is converted into that round boss sticking off the hub where you could press bearings into it. Then, the notches around the outside grab a hold of the ribs you see on the Colson wheel. The hole pattern can then be drilled through the wheel so you can compress sprocket, hub, and wheel with the same bolt pattern to make entire wheel assemblies. Just an idea to get those other ideas flowing... -Brando |
Re: pic: GUS Team 228's Prototype Sheet Metal 6WD Chassis
Can someone provide a part no. from McMaster for these wheels? I know they're available elsewhere, but McMaster seems like it might be a more reliable source.
I haven't been able to find any good information regarding bore diameter and overall hub diameter, but if the hub is large enough to accept the pseudo-standard 1.875" six hole circle, these should be pretty easy to mount. |
Re: pic: GUS Team 228's Prototype Sheet Metal 6WD Chassis
Searching "rubber wheels" in mcmaster brings up the page
Colson Performa (the wheels in this thread) are on the lower half of the page titled "Performance rubber wheels" We used the 3"x7/8ths wide ones in the 4 corners of our 6wd swerve this last year, live axle 3/8ths hex hub, and 3 bolts going through the wheel and hub. The hub was a simple 1.25" diameter .1" ish wide flange, 3 bolt pattern with a smaller diameter that went through the wheel hub. Not having to worry about retreading is nice. |
Re: pic: GUS Team 228's Prototype Sheet Metal 6WD Chassis
Arthur, It's great to see more awesome sheet metal musings from your team. You guys really nail the simplicity and efficiency aspect of your designs every year and have become one of my favorite teams to watch during the build season.
This looks like the most robust, clean, well thought out 6wd chassis I've seen posted up here. It's one of those designs that makes me think "I wish I had one!" |
Re: pic: GUS Team 228's Prototype Sheet Metal 6WD Chassis
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But depending on the game, this number can easily be increased. One design we drew up (only drew a 2D side sketch of a chassis rail) had angled bottoms and could clear a 30-degree ramp. Quote:
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We also chose #10-32 over #10-24 for two reasons: 1) #10-32 are the screws needed to mount the CIM motor, so we might as well stick to one or the other (nothing is more annoying than picking up a #10 nylock nut and realizing it's the wrong pitch), and 2) the ratio of shank size to pitch of #10-24 screws often causes them to be the second most broken tap at machine shops (#6-32 is the worst). Quote:
Plus, we also have a habit of adding in a lot more mounting holes than most parts need. Often times we've found that these extra holes help us out in a pinch when we need to mount a Lexan panel or zip tie wiring to. |
Re: pic: GUS Team 228's Prototype Sheet Metal 6WD Chassis
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Any difference between the black tread and the gray tread offered at RobotMarketPlace? Doesn't seem to be from the specs. Is the gray non-marking whereas black is marking?
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Re: pic: GUS Team 228's Prototype Sheet Metal 6WD Chassis
The NPC Wheel at robotmarketplace comes with a hub already if anyone is interested:
http://www.robotmarketplace.com/prod...lrin_hubs.html something 1712 has used in the past |
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Re: pic: GUS Team 228's Prototype Sheet Metal 6WD Chassis
Wow, looks great guys, and it looks like it will work out very well this year! Good luck at the competitions!
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