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-   -   Cost of Andymark 6" Mecanum Wheels (http://www.chiefdelphi.com/forums/showthread.php?t=153490)

pntbll1313 12-01-2017 12:42

Re: Cost of Andymark 6" Mecanum Wheels
 
Quote:

Originally Posted by JesseK (Post 1629984)
In the 2013 videos I saw, they saved maybe a second per cycle lining up to the HP feeder when compared to teams who had enough practice to realize they were misaligned and readjusted with tank.

Here is a short compilation of our mecanum from 2013. I think this was probably one of our most effective mecanum robots.

JohnFogarty 12-01-2017 12:47

Re: Cost of Andymark 6" Mecanum Wheels
 
Quote:

Originally Posted by pntbll1313 (Post 1629991)
Here is a short compilation of our mecanum from 2013. I think this was probably one of our most effective mecanum robots.

You should post this in the Mechanum vs Tank Drive thread if you haven't already. Those spin moves your driver did were disgustingly good...and not possible with tank drive either....I think.

JesseK 12-01-2017 12:49

Re: Cost of Andymark 6" Mecanum Wheels
 
Quote:

Originally Posted by pntbll1313 (Post 1629991)
Here is a short compilation of our mecanum from 2013. I think this was probably one of our most effective mecanum robots.

Thanks for that video - it helps show off the best of what Mecanum can offer. I see a lot more strafing and even more 'whip arounds' that proved beneficial.

It seems like there were as many great uses of field elements to dodge defense in addition to the agility. If the pyramids were solid, do you expect you'd have similar results? There are very similar pinch points this year.

Andrew_L 12-01-2017 13:13

Re: Cost of Andymark 6" Mecanum Wheels
 
But why are you using giant vectored intake wheels on the drivetrain?

cadandcookies 12-01-2017 13:31

Re: Cost of Andymark 6" Mecanum Wheels
 
Quote:

Originally Posted by JohnFogarty (Post 1629994)
You should post this in the Mechanum vs Tank Drive thread if you haven't already. Those spin moves your driver did were disgustingly good...and not possible with tank drive either....I think.

I've said for a while that 2052 is the only team I've ever seen do mecanum well, and Silverfish (if I remember the name correctly) is certainly case in point. I've never seen another team approach what they were able to do with mecanum, especially 2012-14.

pntbll1313 12-01-2017 14:01

Re: Cost of Andymark 6" Mecanum Wheels
 
Quote:

Originally Posted by JesseK (Post 1629999)
Thanks for that video - it helps show off the best of what Mecanum can offer. I see a lot more strafing and even more 'whip arounds' that proved beneficial.

It seems like there were as many great uses of field elements to dodge defense in addition to the agility. If the pyramids were solid, do you expect you'd have similar results? There are very similar pinch points this year.

I do not think we would have been as effective had the pyramids been solid. A lot of our strategy that year used the 4 corners of the pyramids to set picks for ourselves. We still would have been able to utilize the 180 spins to get out of T-bones and to quickly line up to the feeder.

scca229 12-01-2017 14:45

Re: Cost of Andymark 6" Mecanum Wheels
 
Quote:

Originally Posted by 1247Robotics (Post 1629625)
One of our mentors and just picked up a set of the Andymark 6" HD Mecanum wheels. The cost of the wheels is $104 each. We just re-read the rules on cost (R11 specifically) and we weren't sure if they are legal since they have to be used together as a set. that means their total cost is $416; which is over the $400 max. Please let us know if we can build our bot around these wheels.

I've seen plenty of intakes that use only 2 mecanum wheels. A good example of what you are doing is the Rhino Track Drive Modules that were popular last year. Each of them is $369 and I can't say I ever saw a single one used on a bot, but you could if you wanted to (maybe we will as a conveyor somewhere this year). Enter each wheel as a separate COTS accounting item on the CAW.

The intent of the rule is that you can't purchase an unassembled kit of 3 parts for $200 each that are also sold as a fully assembled module for $700 and consider them separate COTS items if they are essentially useless unless combined into that module. That is attempting to skirt the $400 max per module rule in R11.

Even though the *normal* (whatever that is when talking about mecanum wheels anyway) method is to use them as a set of 4 in a drivetrain, there are many other uses.


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