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 Honestly, I'd volunteer my team to be on that alliance. It'd be an honor to touch bumpers with those bots. - ttldomination [more] |
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This is what happens when a first year tries to move a gear box back with a raw hide hammer.
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Rawhide Mallet not hammer
Discussion
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11-09-2005 07:18 PM
EricH
Re: pic: gear boxes
Congratulations. A kit gearbox finally broke due to team efforts. How much force/how many hits did the breaker(s) use? And, more importantly, is it still usable?
11-09-2005 07:43 PM
Tytus Gerrish
Re: pic: gear boxes
That looks like somthing i would do. why are you guys being like me, its not good for you.
11-09-2005 07:46 PM
Kyle A
Re: pic: gear boxes
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Originally Posted by EricH
Congratulations. A kit gearbox finally broke due to team efforts. How much force/how many hits did the breaker(s) use? And, more importantly, is it still usable?
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11-09-2005 07:49 PM
Andrew Blair
Re: pic: gear boxes
Well, I guess not not hard. I didn't personally see it happen, but boy did my jaw drop when I saw it. I know casting's are brittle, but that seems a little much. The gear box is completely useable, unless something else goes. Either way, we have two more of these if we have to replace it. Our mentor didn't completely trust these boxes, so bought spares. Guess he knew something!
So kids, remember: listen to your mentors, they might possibly not be totally wrong...
11-09-2005 10:53 PM
David Guzman
Re: pic: gear boxes
Funny, I thought it only happened to us.
The same exact thing happened to us on our practice robot. It still worked when it was broken but we got it welded and although it doesn't look great it works fine. I ll try to post a picture.
Dave
11-09-2005 11:43 PM
scitobor 617
Re: pic: gear boxes
When I first saw the picture I thought it was intentional to reduce weight. I had no clue that the casing was that brittle, that is very surprising.
11-09-2005 11:54 PM
Cory
Re: pic: gear boxes
Gotta wonder why exactly you'd be smacking the gearbox with a hammer...
at least get a mallet.
11-09-2005 11:57 PM
Stephen Kowski
Re: pic: gear boxes
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Originally Posted by Cory
Gotta wonder why exactly you'd be smacking the gearbox with a hammer...
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11-10-2005 12:10 AM
Cory
Re: pic: gear boxes
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Originally Posted by Stephen Kowski
alignment....obviously....or perhaps they we trying to pressfit something to the top of the gearbox
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11-10-2005 06:49 PM
Nitroxextreme
Re: pic: gear boxes
all I have to say is wow...just goes to show that you need to watch all your hammers
11-10-2005 06:52 PM
Paul Copioli
Re: pic: gear boxes
Well I guess you figured out that the gearbox casting wasn't designed to take a hammer hit on the side walls. Those side walls were designed as thin as could be cast in order to keep the weight down. Under normal robot operating loads, that should never happen .......
11-13-2005 08:22 PM
phrontist
Re: pic: gear boxes
We had an unexplained fracture exactly like this which we ascribed to manufacturing fluke. We were just playing with the practice bot and some observant student noticed it had developed a fissure. This was less than an hour of use...
11-22-2005 12:00 AM
Andrew Y.
Re: pic: gear boxes
as long as it dosent happen in the middle of a match
11-22-2005 11:13 AM
sanddrag
Re: pic: gear boxes
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Originally Posted by Andrew Y.
as long as it dosent happen in the middle of a match
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11-22-2005 05:42 PM
Andrew Blair
Re: pic: gear boxes
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Originally Posted by Paul Copioli
Well I guess you figured out that the gearbox casting wasn't designed to take a hammer hit on the side walls. Those side walls were designed as thin as could be cast in order to keep the weight down. Under normal robot operating loads, that should never happen .......
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Though I act like it's not my fault. The knowing are to blame when someone makes a mistake unknowingly.
11-23-2005 01:37 PM
alphastryk
Re: pic: gear boxes
I have to say...if those boxes are that weak...might be good to avoid them entirely. if they randomly break after little use I wonder if FIRST would replace them for you?
11-23-2005 02:57 PM
Andrew Blair
Re: pic: gear boxes
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Originally Posted by alphastryk
I have to say...if those boxes are that weak...might be good to avoid them entirely. if they randomly break after little use I wonder if FIRST would replace them for you?
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11-23-2005 06:44 PM
Cory
Re: pic: gear boxes
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Originally Posted by alphastryk
I have to say...if those boxes are that weak...might be good to avoid them entirely. if they randomly break after little use I wonder if FIRST would replace them for you?
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Just a thought...
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