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Originally Posted by Andy4Hawks
We've just got our transmissions up and running tonight. We're using the Fisher Price motors (teamed with the drills) and we noticed when we powered it tonight that the Fisher Price motors displays a fair amount of arcing under a light load from the brushes. We ran it for them for a few minutes, and it doesn't seem to be a problem but we are curious if others have noticed this?
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I have seen a significant amount of arcing on the FPs (the can practically glows) but only under heavy load (near stall). The only recommendation that I have is to put an ammeter on the motors and make sure that what you think is a light load is really a light load. If they are drawing 20 or 30 A, you may have some significant side loads or misalignment.