Banebot 56mm gearbox - double D - RELOADED

Technical Motors
79

My team is experiencing 2 issues with the BaneBots 56mm transmissions.

Here’s our setup:

  • 4 56mm 16:1 BB Transmisions
  • 4 CIM motors
  • Each motor/transmission combination directly drives an 8-inch wheel.

Here are our problems:

  1. Carrier plate issue.
    This is well understood so I won’t take up space here.
  2. Brass dust from the planetary gears.
    We drove our robot around for about an hour and had no problems. After that first hour we noticed that our robot was “swerving” a bit. After about 2 hours, we noticed that 2 of our wheels were very reluctant to rotate. After reading this thread, we disassembled our BB transmissions and found a lot of brass dust inside. We cleaned out all of the grease (brass paste at this point) and re-lubricated the transmissions with all-purpose automotive chassis grease. This seemed to improve our situation. However, one of the transmissions rotates well, 2 rotate fairly well, and 1 is still pretty tight.

Our next steps:

  1. Break in the transmissions (no-load duration test)
  2. Check for more gear dust
  3. Monitor current draw from the CIMs

Any advice would be greatly appreciated.
Thanks.

Editor’s note: I (Joe J) have closed this thread, but the Second Stage Sun Seizing discussion continues here.