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Looking for Mecanum Wheels
Anyone know where can i get mecanum wheels? We are working on a chassis for next year's competition and it involves mechanum wheels . . . but they are no where to be found.
![]() ^Example of one type of mechanum wheel^ |
Re: Looking for Mecanum Wheels
Mecanum wheels rock :cool:
I think a company named airtrax makes them, but it might make more sense to make them yourself... |
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If you have some patience...I believe they are coming to FIRST next year?
I was talking to team at nationals(dont remember number...will look up) and they had these awesome mecanum wheels. So first question was how did you make them? Their response was that a company approached them and asked them to "test" the wheels out and make improvements. After further conversation I found out that they had done some serious "weight reduction" on them and that they hoped the company would consider the changes. They also informed me that the company had wanted to release them this year for FIRST teams, but they could not meet the requirement of having enough for every team to buy a set. They also told me that we can plan on seeing them next year for sale for about $350 for a set of 4. Again this is all from memory and they were still not absolutely positive they would be coming out this year....but wow if we can get "light" mecanum wheels for 350 a set...SIGN ME UP. :D |
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there are many ways to make Mecanum wheelers but almost nowhere to "buy them off the shelf" in any moderately convient size atleast they can be made by machining, bending plate bolting together Assemblies. whatever to get rollers mounted on a 45° around an Axel. feel free to pm me for more info
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This would be much much simpler on a trunion mill.... but those are hard to find ($$$) It might be able to be done without the rotary axis, but you'd be there all day doing exacting setups for every roller on the wheel, then the surfacing on the top and bottom. Someday when i have a lot of time i have nothing to do with i'll probably try this. P.S. AIRTRAX does make mechanum wheels off-the-shelf. ;) -Q |
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AndyMark will be selling 8" Mecanum wheels this fall. The design is based on sheet metal sides with bent tabs. These wheels were seen at team 45's pit at the Championships. The unofficial price target for each wheel will be between $75-$90. They will be available in the early fall (end of August).
PM me if you would like more information on these wheels. Andy B. |
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I got to see the new AndyMark Mecanum wheels in Atlanta and I love the simple elegant design. I was really bummed when I didn't win them! There was mention of a possible white paper on them to be posted on the TechnoKats website. Is this still fourth coming? How about posting a picture so that everyone that didn't get to see this much sought after COTS product can see what they have to look forward to. I predict many teams will have Mecanums this next year! Great job bringing these sort of products to the market for teams that don't have the resources to make them themselves. Kudos to you and Mark! BTW: What sort of hub setup are you thinking of for the final design? For what it's worth I would love to see a setup compatable with IFI wheels with the same sort of 3/8" flanged bearings and sprocket hole pattern (6 on 1.875" IIRC). They would then be a drop in replacement on the KitBot chassis. |
Re: Looking for Mecanum Wheels
Any more details? Wheel width, number of rollers, roller diameter & length (material?), and overall weight. All this would be helpful in thinking of a robot design that uses these wheels. :)
Could you attach a image of the mechanum wheels for those of us that were not there to see them? This would be nice. |
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It will be very interesting to see how many 'bots are sporting "Powered by AndyMark" stickers on their chassis next year. |
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We definitely will have the 6 holes on a 1.875" pattern, which is what our polycarbonate omni-wheels and our Traction Wheels have. We were thinking to have a 1.124" hole in each side plate, for mounting a 1/2" id flange bearing, but if most people want to use 3/8" bearings, we can do a 0.874" hole. Now is the time to give us input on this. We've debugged these wheels last fall, as TechnoKat students made a drive base and actually sat on it while driving it around our shop. The wheels held up beautifully, and strafed sideways better when they had an extra 100# on the drive base. More to follow... Andy B. |
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Personally, I'd prefer a 1/2" bore with a 1/8" keyway to use a live axle of the type, but that's just me. Perhaps such a hub will be available?
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If we go with 1.124" holes for 1/2" flanged bearings, that Universal Hub fits right in the hole and mates up with the 1.875" hole pattern. Thanks, AB |
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On the other hand, you can get bearings with the right OD and ID off of McMaster-Carr. Perhaps offering both sets of bearings would do the job? |
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Heres a picture of the wheels the TechnoKatz had in Atlanta. I personally thought they were a bit bulky, but it was a good prototype. I hope for it to be more streamlined and a bit lighter. Those wheels must have weighted 4-6 pounds each. Well I would really like to give mad props to AndyMark for making a holonomic Drive system compatible with the KOP chassis. Now if you guys made small 14-1 gearboxes for one cim to compliment it, you'd be a FIRST God. O yeh, on a personal note, as much as I love these wheels, I'm going to try to steer my team away from it because I like having a unique design. I like the challenge of building something new, creative, innovative, beautiful, and works really good too and getting the satisfaction of building something that performs amazingly. Well I'm glad you made these mecanums and good luck to the teams who use them. Heres that picture. Sorry I made it a short monolouge there.
http://www.chiefdelphi.com/media/photos/25002 |
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Andy B. |
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These are the mecanums we're making for next year:
http://www.chiefdelphi.com/forums/sh...ad.php?t=46175 Blanks were cut from 3/4" plate on a CNC mill by our machinist, then everything else was done with a manual mill. |
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Andy, what material is the hub made out of, and are you using the same roller material as you have for the omnis? |
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AB |
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I think you should bore them to 1.124 and also make pressfit bushings available to easily convert them the .874 if needed. In actuallity though you can buy bearings from mcmaster that are 3/8 and have an OD of 1.125. edit: although andy are the holes on the hole pattern going to be #10 (like ifi sprockets and the deka plastic hubs or are they going to be 1/4 like your molded omni wheels? |
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These holes will be #10 clearance holes (or M5), at 0.205-0.210 diameter. The 0.250" holes in the omni-wheels were designed to be #10 clearance holes also, but our molder turned them into 0.250". Andy B. |
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I'm sure there will be some sort of display for these at IRI right? Ed showed us some video of the BattleBot, Acoholic Stepfather using mecanum wheels and our team fell in love with them. Although I knew about them far ahead of time, I had not yet made any sort of presentation about them. Ed wants to experiment with mecanum drive over the summer I think.
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