Chief Delphi - Omni Wheels with KOP Andy Mark Chassis

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- - Omni Wheels with KOP Andy Mark Chassis (http://www.chiefdelphi.com/forums/showthread.php?t=132199)

sasha831

05-01-2015 22:55

Omni Wheels with KOP Andy Mark Chassis

Our team wants to create a slide chassis this year, and were considering doing this by switching the 4" KOP wheels provided with 6" omni wheels, and then adding two perpendicular omni wheels in the center, at each end of the frame.

Our question was whether it was possible to connect the omni wheels to the current belt drive system, what interfaces/hubs we would need, and whether or not the belt would interfere with the wheel itself?

Similar to this:
https://www.youtube.com/watch?v=JqJK0E9Jpmk

Mike Marandola

05-01-2015 23:05

Re: Omni Wheels with KOP Andy Mark Chassis

If you are using these, the included pulleys will interface. You will just need to make custom spacers since they are thinner than the HiGrips. The belts will not interfere with the wheel due to the pulley flange and the taper of the wheel. For 6 inch wheels you will most likely use the holes specified for the square oriented chassis. The AM14U2 User Guide says to use 151 tooth (am-2706) belts for that.

Peyton Yeung

05-01-2015 23:06

Re: Omni Wheels with KOP Andy Mark Chassis

The Ri3D used the kit frame and drive set up to create a slide drive.

sasha831

06-01-2015 01:16

Re: Omni Wheels with KOP Andy Mark Chassis

Quote:

If you are using these, the included pulleys will interface.

We were planning on using the Vex ones, as we wanted a double wheel, not single. We are open to using these from AndyMark, but they are 5 times as expensive as the Vex, so Vex is prefered.

Quote:

The Ri3D used the kit frame and drive set up to create a slide drive.

Yes, oRyon Labs had a slide base, but they used a custom Vex Chassis. Or were you referring to a different Ri3D team?

Mike Marandola

06-01-2015 01:24

Re: Omni Wheels with KOP Andy Mark Chassis

Quote:

Originally Posted by sasha831 (Post 1422522)

We were planning on using the Vex ones, as we wanted a double wheel, not single. We are open to using these from AndyMark, but they are 5 times as expensive as the Vex, so Vex is prefered.

Yes, oRyon Labs had a slide base, but they used a custom Vex Chassis. Or were you referring to a different Ri3D team?

You should be able to use the VEX 6 inch omnis. According to this, the VersaKey will not cause issues with the AM pulleys.

ratdude747

06-01-2015 01:57

Re: Omni Wheels with KOP Andy Mark Chassis

Quote:

Originally Posted by Peyton Yeung (Post 1422429)

The Ri3D used the kit frame and drive set up to create a slide drive.

Video deleted.

Mike Marandola

06-01-2015 02:12

Re: Omni Wheels with KOP Andy Mark Chassis

Quote:

Originally Posted by ratdude747 (Post 1422542)

Video deleted.

This is the video that was removed. It is an AM14U2 with an 80/20 rail to support their slide gearbox.

Charger

06-01-2015 14:17

Re: Omni Wheels with KOP Andy Mark Chassis

Does anybody know how can we use 4" andymark omni wheels in KoP chassis? Can we just put dualie 4" Omni wheels instead of hi grip wheels or do we need to buy or make special hubs or spacers?

sasha831

06-01-2015 17:59

Re: Omni Wheels with KOP Andy Mark Chassis

Quote:

Originally Posted by Charger (Post 1422829)

Does anybody know how can we use 4" andymark omni wheels in KoP chassis? Can we just put dualie 4" Omni wheels instead of hi grip wheels or do we need to buy or make special hubs or spacers?

If you use these, then you can just swap them with the regular wheels, however if you want to use these or these, you will need extra parts to interface them to the current belt pulleys

Mike Marandola

07-01-2015 00:26

Re: Omni Wheels with KOP Andy Mark Chassis

Quote:

Originally Posted by sasha831 (Post 1423093)

If you use these, then you can just swap them with the regular wheels, however if you want to use these or these, you will need extra parts to interface them to the current belt pulleys

Are you sure about that? The DuraOmni wheels are significantly wider than the included HiGrips. New spacers will have to be made at the very least.

Charger

07-01-2015 03:25

Re: Omni Wheels with KOP Andy Mark Chassis

Quote:

Originally Posted by sasha831 (Post 1423093)

If you use these, then you can just swap them with the regular wheels, however if you want to use these or these, you will need extra parts to interface them to the current belt pulleys

well , I think using some spacers and hubs will be enough to use 4" dualie plastic / aluminum omniwheels. But what I'm curious about is, the hubs that come with chassis, are they suitable for 4" omni wheels?

sasha831

07-01-2015 06:31

Re: Omni Wheels with KOP Andy Mark Chassis

Quote:

Originally Posted by Charger (Post 1423404)

The provided hubs are suitable for the cheaper dura wheels, not for the dualie wheels

Quote:

Originally Posted by Mike Marandola (Post 1423360)

Are you sure about that? The DuraOmni wheels are significantly wider than the included HiGrips. New spacers will have to be made at the very least.

No, that's a very good pickup, I just did the math, and you have 3.625" of space on each side, while the DuraOmni + 2 pulleys (assuming middle wheel) are 3.78". However, If you only put in the outer wheels, then that becomes 2.89", and so the two outer wheels(Green in diagram) will fit into the chassis fine(with new spacers), while the middle one(red in diagram) will not

Diagram: http://i.imgur.com/oWDiqXO.png?1

So in short, teams can use the DuraOmni with all the default gear for a 4 wheel drive, not a 6 wheel drive

sasha831

07-01-2015 19:44

Re: Omni Wheels with KOP Andy Mark Chassis

Quote:

Originally Posted by Mike Marandola (Post 1422527)

You should be able to use the VEX 6 inch omnis. According to this, the VersaKey will not cause issues with the AM pulleys.

Will the 6" omni's have enough height clearance? They are 37mm wide, while the default Hi-Grips are 25mm wide

Ginger Power

07-01-2015 19:57

Re: Omni Wheels with KOP Andy Mark Chassis

Quote:

Originally Posted by Mike Marandola (Post 1422548)

This is the video that was removed. It is an AM14U2 with an 80/20 rail to support their slide gearbox.

Sorry we took the video down. It got messed up while downloading. Better Video

This video better shows off the slide drive with the AM14U2.

Edit: My bad that's the same video you linked. I'm still tired from the build...

Mike Marandola

07-01-2015 21:35

Re: Omni Wheels with KOP Andy Mark Chassis

Quote:

Originally Posted by sasha831 (Post 1423956)

Will the 6" omni's have enough height clearance? They are 37mm wide, while the default Hi-Grips are 25mm wide

What do you mean by height clearance? So it doesn't hit the flanges?

sasha831

07-01-2015 22:24

Re: Omni Wheels with KOP Andy Mark Chassis

Quote:

Originally Posted by Mike Marandola (Post 1424014)

What do you mean by height clearance? So it doesn't hit the flanges?

Yes, That is exactly what I mean, Whether the thicker Vex Omni's will fit between the flanges

Mike Marandola

07-01-2015 22:44

Re: Omni Wheels with KOP Andy Mark Chassis

1 Attachment(s)

Quote:

Originally Posted by sasha831 (Post 1424049)

Yes, That is exactly what I mean, Whether the thicker Vex Omni's will fit between the flanges

They will be cutting it close. The distance between flanges is 1.75". The center wheel is what would cause an issue since there is not much room to move side to side. I would advise you to assemble it in CAD or contact AM.

Dad1279

19-01-2015 02:09

Re: Omni Wheels with KOP Andy Mark Chassis

Quote:

Originally Posted by Mike Marandola (Post 1424060)

The Vex 6" Omnis will fit between the flanges, but the KOP spacers need to be changed. I just uploaded the adapter we used to adapt the KOP AM pulley to Vex omni, and space it so the belt clears. http://www.thingiverse.com/thing:642155

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