Re: Removing Bosch Drill Pins - Cause of Failure?
 

Mike-

You don't need to manufacture any new parts on account of taking out the pins from the drill trannys, they run beautifully unmodified after removing the pins.

Re: Removing Bosch Drill Pins - Cause of Failure?
 

Pamela,
Thats good news. The last slide in the powerpoint pres on the FIRST site said make a new shaft, etc.

Am I correct that there are only two pins?[IMG]http://[/IMG]

Mike

Re: Removing Bosch Drill Pins - Cause of Failure?
 

yes, there are indeed 2 pins. Dr. Joe recommended a new shaft so that it wasnt threaded., making it easier to couple to another shaft, or mount a sprocket on.

Cory

Re: Removing Bosch Drill Pins - Cause of Failure?
 

That PowerPoint slide set was assembled based on the assumption that you wanted to replace a major portion of the standard Bosch gearbox (ie. with a modified "Dr. Joe's Output Shaft" or similar device). If you are just removing the anti-backdrive pins, then you can stop after Slide #4.

-dave

Re: Removing Bosch Drill Pins - Cause of Failure?
 

We took ours out today. We were following the PowerPoint to the pixel and started to pull off other parts until we realized "hey, we already got the pins out, we're done!" Hehe. Anyway, it is an extremely easy procedure if you are careful. I can't wait to try them in the new "QuadraMax G2" :)

Re: Removing Bosch Drill Pins - Cause of Failure?
 

Mike,
If or when you remove the pins there is no change in the output shaft. You can still use the supplied hardware to make a drive system. The output shaft of the supplied drill tranmission has a standard drill chuck termination with a left handed thread and a locking screw just like all drills. Teams that are new to this arrangment should remember to use that locking screw and be sure it is tight before final assembly.

Re: Removing Bosch Drill Pins - Cause of Failure?
 

Thanks to everyone for clearing this up. We will be taking them out.

Re: Removing Bosch Drill Pins - Cause of Failure?
 

Ahhhhhh... THAT'S the problem!!!!

We too, had the problem of the clutch slipping after having removed the pins. Al Skierkiewicz, thank you. I was losing my mind, having rebuilt that gearbox three times.

Here's another possible issue to contend with. We had treads last year and when we wanted to dead-recon turn by stopping one tread and continuing forward with the other, the bot had so little resistance on the stopped side (no backwalk pins) that it continued to roll forward and not turn at all. We had to actually change the program from 127 to 115 on the stopped side. Is there an easier way which we overlooked?

Re: Removing Bosch Drill Pins - Cause of Failure?
 

I'm not sure how much "stopping force" it provides but don't forget about the brake jumper on the speed control.

Re: Removing Bosch Drill Pins - Cause of Failure?
 

Kevin,
I think what you were up against is the extreme friction produced by tank treads. Even with the speed controllers set to brake, there is not enough force to hold back the non-moving side. You have to visualize the transfer of forces as the robot tries to turn and that the treads are trying to slide sideways as well. Tank treads are OK for certain games but they are bad if you want manuerverability and low current demand. If you look at the Innovation First site I think they still have a paper showing the currents generated by different drive systems. You can't stop a tank but you can't turn it on carpet either.