[tim-tim]

I believe your best bet is to ask some of the teams at the San Diego Regional (the one you are at) for some help. A few that come to mind are 987 and 1538. They should be able to help you troubleshoot and identify the problem and possible solutions.

As a mechanical person, it sounds like a mechanical problem (programming has very little control over grinding). Have you check the gears for proper engagement and alignment? Did you grease the gears at install? Are the motors hot? There are many potential issues, but without knowing more and seeing or hearing the problem it's hard to tell.