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View Poll Results: Mecanum or 6WD
Mecanum 90 40.36%
6WD 133 59.64%
Voters: 223. You may not vote on this poll

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Unread 09-01-2011, 16:01
Ryan_Davis Ryan_Davis is offline
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Re: Mecanum or 6WD

Quote:
Originally Posted by Charmander View Post
So my team has had a big debate between Mecanum and 6WD. 6WD is ideal for transporting tubes from one side of the field to the other because of the potential speed, while Mecanum is ideal for placing tubes on the scoring grid due to the lateral movement. We are allowed to "throw" the tubes to the center. This ability supports Mecanum because it shortens the distance of travel. However, this will cause an increase in robot to robot contact to which mecanum wheels are not well equipped for due to low traction. We have heard a lot of hype about the 6WD on the forums.

Questions:

6WD or Mecanum? Which do you prefer and why?

What is the turn radius of 6WD?

Do you predict the game to be high contact or not? Why?
I think Mecanum seeing as it brought success for us last year, the turn radius can't be that good for 6WD not to mention the extra power expended in turning those two extra wheels. Then again Mecanum requires four motors. I predict we will see robots shatter. I liked that at the kickoff.
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Unread 09-01-2011, 16:03
Ryan_Davis Ryan_Davis is offline
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Re: Mecanum or 6WD

The rules state that four motors is max just fyi.
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Unread 09-01-2011, 16:14
BrendanB BrendanB is offline
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Re: Mecanum or 6WD

Quote:
Originally Posted by Ryan_Davis View Post
The rules state that four motors is max just fyi.
You can have a max of 4 cims plus the motors included in the kop.


I would go with 6wd over mecanum in a heartbeat. Mecanums as mentioned have no pushing power and you won't be driving as fast around the field either. One problem with throwing the tubes to the center is you are increasing the chance for your opponents to grab it especially if you are the weaker drive. Yes there is some advantages with the lateral movement in front of the rack, but I'd take speed and pushing power over that.

A properly built 6wd and 8wd will have a turn radius of zero and waste no power.
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Unread 09-01-2011, 16:22
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Re: Mecanum or 6WD

6wd is the best because, not only is it faster and has more power, it can even be considered more manuverable than a mecanum. We tested this with our previous robots it takes 4 seconds with 6wd and 11 seconds with mecanum.
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Unread 09-01-2011, 16:51
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Re: Mecanum or 6WD

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Originally Posted by EagleEngineer View Post
it takes 4 seconds with 6wd and 11 seconds with mecanum.
to do what?
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Unread 09-01-2011, 18:25
Ryan_Davis Ryan_Davis is offline
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Re: Mecanum or 6WD

Quote:
Originally Posted by BrendanB View Post
You can have a max of 4 cims plus the motors included in the kop.


I would go with 6wd over mecanum in a heartbeat. Mecanums as mentioned have no pushing power and you won't be driving as fast around the field either. One problem with throwing the tubes to the center is you are increasing the chance for your opponents to grab it especially if you are the weaker drive. Yes there is some advantages with the lateral movement in front of the rack, but I'd take speed and pushing power over that.

A properly built 6wd and 8wd will have a turn radius of zero and waste no power.
The rules say:
Quote:
<R45> Motors specifically permitted on 2011 FRC ROBOTS include:
A. all motors, actuators, and servos listed in the 2011 KOP Checklist,
B. an unlimited number of COTS servos with a maximum power rating of 4W ,
C. one or two CIM motors in addition to
those provided in the KOP. This means up to four CIM motors and no more can be used on the robot
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Unread 09-01-2011, 22:02
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Re: Mecanum or 6WD

Quote:
Originally Posted by Ryan_Davis View Post
The rules say:
Exactly! I was replying to someone who stated that only 4 cims can be used on the robot and only the four no other motors.
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