Re: Banebots RS-775 Case Short
 

I am glad to finally hear a few positive comments about Banebots in this thread. The RS775 has been a problem for everyone using it in the FIRST applications, but that's the way things work when you use a part in something other than its intended application (it's probably intended for harbor freight battery-operated drills, where you shouldn't be surprised if you lose part of a winding and a short to the motor case has no other negative effect). Banebots has been responsive whenever we have contacted them, and I like their planetary gearboxes. The 64:1, 16:1 and 4:1 gearboxes differ only in their ring gear length, so you can buy some 64:1 gearboxes and some shorter ring gears before build season starts, and be ready for most situations with very little money spent. I haven't found similar functionality for similar prices elsewhere.

Re: Banebots RS-775 Case Short
 

For a robotics application, non-FRC, my team got several 775-18 motors (the 775-12 is being discontinued). Tests are pending for shorts; they will be used in a critical system. Yes, we made sure to get spares. (And the packaging? Motors in styrofoam, and packing peanuts filled the rest of the box except maybe where the P60 gearboxes were--USPS Priority Mail box.)

Re: Banebots RS-775 Case Short
 

Banebots should be doing a dielectric test with a HiPot tester, not merely a resistance check with an ohmmeter.

Re: Banebots RS-775 Case Short
 

I believe in giving credit where credit is due - especially when I pointed out banebots flaws so often before.

It seems they're learning. Returns are easy and aren't argued at all. The banebots we've gotten (8) have not had any case shorts.

I'll be retesting the ones we've been running on our shooter tonight- they've run for probably 20-24 hours of actual spinning time and if they haven't developed shorts now, they probably never will.

So, right now I'm giving banebots a golf clap for having improved their return mechanism, and seemingly doing a pretty fair job of quality checking their product.

In point of fact, I've had as many problems with AM products as I have with banebots this year. Of course, AM has so much good will built up with me they could probably just forget to ship something and I'd give them a pass!

Re: Banebots RS-775 Case Short
 

So do I, but I think you missed my point.

Banebots claimed they are doing 100% testing of the 775-18's.

Since teams continued to receive case-shorted motors after that policy was implemented, it's a strong indicator that they are not doing HiPot testing, which would be the appropriate testing for this type of problem.

Re: Banebots RS-775 Case Short
 

Just to confirm, the RS-550 doesn't have the same problem?

Re: Banebots RS-775 Case Short
 

It's never been detected, to my knowledge. Just the RS-775 (I think just the RS-775-18, to be more specific).

Re: Banebots RS-775 Case Short
 

We had a 550 with a case short. Don't know if it came that way or if the short developed from over heating. Our shooter is driven by two 550s in a CIM-U-LATOR that's been modified to allow air flow to the vents on the motor face. I've been told that the motors got pretty hot during one extended practice session, but continued to work fine. Then at our first competition, we failed the continuity test during inspection. We traced it to one of the 550s.

Re: Banebots RS-775 Case Short
 

Has anyone else had an issue with the PG-71 gearmotor's 775 shorting?

Re: Banebots RS-775 Case Short
 

We've had no such issue, but the only PG-71 we have is the one we received from the KoP; we found Banebots/FPs to suffice for all our motor needs.

Of the 10-odd 550s and 775s we ordered this year, none had case shorts. Whether case shorts will develop is something only time can tell.

Re: Banebots RS-775 Case Short
 

We have the same deal. All Banebots motors, 550s and 775s, work beautifully, and have been throughout the whole build season.

The only problem we've had with our order was when someone accidentally smashed the shaft of our CIM-U-LATOR gearbox somehow (I think it was a freshman).

Re: Banebots RS-775 Case Short
 

The testers report that they're all good motors, and they've been run-tested. I'll report back if we end up with any issues.

Re: Banebots RS-775 Case Short
 

How did the testers test them? Just with an ohmmeter?