Drill Motor Life

Posted by Ben Mitchell at 2/4/2001 11:41 AM EST

Student on team #303, Vulgens Heroes, from Bridgewater-Raritan HS and Bihler.

I recall reading a post some time back about the drill motors having a limited life- that after a certain number of hours they needed to be changed out.

That post has scrolled off the board, and I would like to know from others’ experience how long the drill motors tend to last, and how often they should be changed out. Also, when they fail, has anyone done a post-mortem to see how - i.e. gearbox failure, armature burned out, bearing failure, et cetera.

Thanks for the assistance.

–Ben Mitchell Team 303 Bridgewater Raritan HS

Posted by Michael Betts at 2/4/2001 12:42 PM EST

Engineer on team #177, Bobcat Robotics, from South Windsor High School and International Fuel Cells.

In Reply to: Drill Motor Life
Posted by Ben Mitchell on 2/4/2001 11:41 AM EST:

: I recall reading a post some time back about the drill motors having a limited life- that after a certain number of hours they needed to be changed out.

: That post has scrolled off the board, and I would like to know from others’ experience how long the drill motors tend to last, and how often they should be changed out. Also, when they fail, has anyone done a post-mortem to see how - i.e. gearbox failure, armature burned out, bearing failure, et cetera.

: Thanks for the assistance.

: --Ben Mitchell Team 303 Bridgewater Raritan HS

Ben,

Properly designed, there should be no problem. We have robots going back over six years that still have their original motors.

In our first and second years, we had problems with gearing and side loads and, yeah, we toasted a few. If your motor gets hot, look at the problem closely. The most likely problem is too much friction or side loading in your system.

Bottom line: We replace motors when they fail.

Mike

Posted by Eric Reed at 2/4/2001 2:25 PM EST

Coach on team #481, NASA Ames / De Anza High School, from De Anza High School and It could be you!.

In Reply to: Re: Drill Motor Life
Posted by Michael Betts on 2/4/2001 12:42 PM EST:

Hi,

We let some of the smoke out of one of our motors. There must still be a bunch left, because it seems to run fine. Think we should change it?

Eric
Team 481

Posted by Michael Ciavaglia at 2/5/2001 11:37 AM EST

Engineer on team #47, Chief Delphi, from Pontiac Central High School and Delphi Interior Systems.

In Reply to: We let the smoke out
Posted by Eric Reed on 2/4/2001 2:25 PM EST:

I think the drill motors might be fine only if a little bit of the magic smoke leaked out. If you can, make sure you collect it next time and put it back in the can. :wink:

By the sounds of it, you weren’t able to collect it. In this case, I would replace the motor.

Mike C.

Posted by Al Skierkiewicz at 2/5/2001 7:36 AM EST

Engineer on team #111, Wildstang, from Wheeling High & Rolling Meadows High and Motorola.

In Reply to: Re: Drill Motor Life
Posted by Michael Betts on 2/4/2001 12:42 PM EST:

I agree, we still have robots going back several years that we pull out for demos and driver training. We have not had problems with drill motor failure on any of those thus far. Our 2000 robot played two regionals, national, one post season, about 6 days of community demos and several days of driver practice with the same motors. Thanks to Raul for a great design on mounting, gearing, etc.
Al

Posted by Ken Leung at 2/5/2001 3:57 AM EST

Student on team #192, Gunn Robotics Team, from Henry M. Gunn Senior High School.

In Reply to: Drill Motor Life
Posted by Ben Mitchell on 2/4/2001 11:41 AM EST:

I just found the link to the discussion about how long drill motor will last. Take a look:

http://www.chiefdelphi.com/wwwboard/messages/.2001/2817.html