Author Topic: Caster issues.  (Read 5081 times)

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Offline Eco19RTopic starter

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Caster issues.
« on: June 21, 2007, 02:05:30 PM »
 I was wondering if anyone had any suggestions as what to use as a rear or front caster for a 2 wheel robot base, The issue is that any caster I can purchase where I live is too large for my needs, Omni wheels are something I will check out but I would like to come up with something that I can purchase around where I live.

Thanks for any help or information you can provide.
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Offline hazzer123

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Re: Caster issues.
« Reply #1 on: June 21, 2007, 02:12:56 PM »
Maybe try a furniture store? They have casters for sofas.

Or anything that slides maybe, depending on what terrain you robot is going to travel on.
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Offline Eco19RTopic starter

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Re: Caster issues.
« Reply #2 on: June 21, 2007, 02:13:43 PM »
All the casters I have found are too large.
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Offline Jeff

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Re: Caster issues.
« Reply #3 on: June 21, 2007, 02:33:46 PM »
If your on a hard surface you could use a teflon slide or something of the sort.
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Offline Eco19RTopic starter

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Re: Caster issues.
« Reply #4 on: June 21, 2007, 03:17:02 PM »
Its going to go on carpet and hardwood flooring -  and it needs to be able to go across the transition between the two without getting stuck. I am thinking about just using a hard plastic ball that I drill a hole through. I might just buy a couple omni wheels.
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Offline megaman935

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Re: Caster issues.
« Reply #5 on: June 22, 2007, 09:52:45 AM »
the plastic ball seems....different..... ;D
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Offline ed1380

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Re: Caster issues.
« Reply #6 on: June 22, 2007, 11:34:36 AM »
I used a golf ball.
it was solid core so pre drilling and screwing in the screw was hard.
maybe glue on a ping pong ball?
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Offline Steve Joblin

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Re: Caster issues.
« Reply #7 on: June 24, 2007, 10:25:54 AM »
I've gotten ball transfers from McMaster-Carr.com  They are used in conveyor systems... go to www.mcmaster-carr.com and search on "ball transfers... then narrow your search on "ball-down" types of ball transfers.

I have also had a lot of success with the Parallax Boe-bot which uses a delrin ball mounted using a cotter pin... check out http://www.parallax.com/detail.asp?product_id=700-00009 for details.
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