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Unread 18-01-2005, 14:51
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weird motor noises

when i turned on all of the CIM motors in the transmission they make a really loud noise. is it ok? is it a problem with the chain or the motors or the transmission ?
or is it normal?
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Unread 18-01-2005, 14:59
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Re: weird motor noises

Quote:
Originally Posted by Leav
when i turned on all of the CIM motors in the transmission they make a really loud noise. is it ok? is it a problem with the chain or the motors or the transmission ?
This has been answered in several posts and is also in the transmission manual. You must grease the transmission with white lithium grease.
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Unread 18-01-2005, 15:00
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Re: weird motor noises

Quote:
Originally Posted by Joe Ross
This has been answered in several posts and is also in the transmission manual. You must grease the transmission with white lithium grease.

sorry for not RTM thanks!

does it HAVE to be "white lithium Grease" ?
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Unread 18-01-2005, 15:02
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Re: weird motor noises

Quote:
Originally Posted by Leav
when i turned on all of the CIM motors in the transmission they make a really loud noise. is it ok? is it a problem with the chain or the motors or the transmission ?
or is it normal?
i suspect you might be having a problem similar to the one described here. we had a similar problem with one of our gearboxes, and decided that rather than disassemble them, remove the retainer ring, find the wayward set screws, and re-assemble them, we'd just live with it. Paul Copioli (who designed them) mentioned in this post that the scoring caused by the retainer rings shouldn't have any adverse effects.

[edit] i also assumed that you removed/replaced the original setscrews on the CIM gears. if this is not the case, then these would cause problems too.
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Last edited by RogerR : 18-01-2005 at 15:06.
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Unread 18-01-2005, 16:20
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Re: weird motor noises

We also had this problem with one of the gear boxes in that the retainer began riding against the outside of the gear teeth. We only ran it for a minute or so before breaking it back down and finding the problem.

As suggested here, replace the retainers with the shorter set screws shipped with the gear box and you should be fine. Don't forget to use the loctite and grease the gears.


Quote:
Originally Posted by Leav
when i turned on all of the CIM motors in the transmission they make a really loud noise. is it ok? is it a problem with the chain or the motors or the transmission ?
or is it normal?
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Unread 12-02-2005, 23:48
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Re: weird motor noises

thanks for the info guys!! ! that really helps.. cuz ours was sounding really rough.. we had greased it well but our first set of transmissions they did not change set screws (for practice bot).. for our competition worthy robot.. we are going to change that..
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Unread 12-02-2005, 23:59
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Re: weird motor noises



OOOOOOHH..... bad call

We used rifle grease......
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Unread 14-02-2005, 11:11
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Re: weird motor noises

I found that our gearbox/motor plate didn't seat fully, probably because of one of the plastic washers in the gearbox. If the allenhead screws were tightened, it would bend the motor mounting plate, which resulted in the motors being bent outwards from each other. I put some shims under the mounting plate, then added some large hose clamps to make sure the motors were parallel. Now the noise doesn't leak out
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