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-   -   pic: Bag of DeWalts (http://www.chiefdelphi.com/forums/showthread.php?t=42936)

Gabe 14-11-2006 01:26

Re: pic: Bag of DeWalts
 
Quote:

Originally Posted by Alex469
Now all you need are some variable diameter wheels and you'll be all set for the rest of robotics. :D

That's really simple, just have pneumatic wheels that you can inflate or deflate using the FIRST pneumatic system. :]

Mr. Van 15-11-2006 15:18

Re: pic: Bag of DeWalts
 
Quote:

Originally Posted by Wayne C.
Prior to the 05 season we buillt a protochassis with Dewalts on each of 4 wheels. When tested against our 2003 gearbox in a pushing contest they over-strained and popped out the breakers consistently. Likewise we ran the robot into a wall and found they popped out easily when the robot was forced to stall.

I'm confused here. Do you mean that the circuit breakers kept tripping (and presumably resetting) or do you mean that the DeWalt popped out of gear into neutral?

Were these 'bots ('03 and prototype) geared to have the same gear ratio (ie. the same 'bot speed at the same motor RPM)?

-Mr. Van
Coach, RoboDox 599

Wayne C. 15-11-2006 22:38

Re: pic: Bag of DeWalts
 
Quote:

Originally Posted by Mr. Van
I'm confused here. Do you mean that the circuit breakers kept tripping (and presumably resetting) or do you mean that the DeWalt popped out of gear into neutral?

Were these 'bots ('03 and prototype) geared to have the same gear ratio (ie. the same 'bot speed at the same motor RPM)?

-Mr. Van
Coach, RoboDox 599


The circuit breakers tripped. In most of the gearboxes you can usually make a wedge or something to prevent the shifting (at least the manual means).

The 03 bot was geared to be a little faster but we hoped that we could use the Dewalts as a replacement with little loss of speed. Instead of making a sophisticated gearbox and adding the Dewalts to it we hoped to bypass the need for two nested gearboxes. After all, why would we want to add them if we were building a gearbox anyway? (no need to reply) The Dewalts simply didnt function to our requirements.

For many teams these might be the answer to their needs. It depends on how hard you press them.

WC

nparikh 16-11-2006 20:29

Re: pic: Bag of DeWalts
 
Quote:

Originally Posted by Wayne C.
The circuit breakers tripped. In most of the gearboxes you can usually make a wedge or something to prevent the shifting (at least the manual means).

The 03 bot was geared to be a little faster but we hoped that we could use the Dewalts as a replacement with little loss of speed. Instead of making a sophisticated gearbox and adding the Dewalts to it we hoped to bypass the need for two nested gearboxes. After all, why would we want to add them if we were building a gearbox anyway? (no need to reply) The Dewalts simply didnt function to our requirements.

For many teams these might be the answer to their needs. It depends on how hard you press them.

WC

Steve + Corey = a new wave in design to figure out how to keep them from breaking our robots. But like someone said..variable wheel size isn't a bad idea :)


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