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Unread 15-02-2011, 02:38
Unsung FIRST Hero
JVN JVN is offline
@JohnVNeun
AKA: John Vielkind-Neun
FRC #0148 (Robowranglers)
Team Role: Engineer
 
Join Date: May 2001
Rookie Year: 2000
Location: Greenville, Tx
Posts: 3,159
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Re: Banebots RS-775 Case Short

Quote:
Originally Posted by rsisk View Post
Could someone please post the steps to check the 775s for a short?

Is there a fix? Or do the motors need to be returned.

Thanks
Use a multimeter to check the resistance between one of your motor leads and the motor casing. If it is conductive, you've got a problem.

We pulled one apart and tried to fix it, but no luck.

We haven't done the RMA process and probably won't bother (the motors have all been modified for use). The ordering (waiting) process was painful enough.

We had one of these motors (via AM Planetary) driving the same gear as a CIM. One of my freshman was wondering why the "gear was sparking." I told him it was normal to see sparks coming out the back of an open motor like the 775. He corrected me -- "not out the back, on the front... on the gear." Ugh -- that was when we first noticed the issue.

-John
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In the interest of full disclosure: I work for VEX Robotics a subsidiary of Innovation First International (IFI) Crown Supplier & Proud Supporter of FIRST

Last edited by JVN : 15-02-2011 at 02:40.