|
|
|
![]() |
|
|||||||
|
||||||||
![]() |
| Thread Tools | Rate Thread | Display Modes |
|
#1
|
|||
|
|||
|
Mecanum wheels
Hi, I was just wondering what is the purpose of the mecanum wheels, how do they work and are they worth the $400 for the set of 4, also if the sell them somewhere else cheaper than that could you give me the link?
|
|
#2
|
||||
|
||||
|
Re: Mecanum wheels
Mecanums have some nice maneuverability. They are able to strafe, for example. (you can find some videos of it on YouTube)
However, mecanum wheels will be weak for pushing power and can slide around. You'll likely be pushed around a lot on the field if you use them |
|
#3
|
||||
|
||||
|
Re: Mecanum wheels
Quote:
Also make sure you know what size you need. Don't use mecanum wheels just for a cool factor. Mecanum wheels are great for maneuverability, but when it comes to pushing they are worthless. |
|
#4
|
||||
|
||||
|
Re: Mecanum wheels
Quote:
The choice is completely dependent on your team's strategy. Is your shooter reliant on consistent positioning? If so, you may not want to use mecanums because of the pushing issue. |
|
#5
|
||||
|
||||
|
Re: Mecanum wheels
In this game the only big advantage I see for them is with catching the ball from the truss, so unless that's a big part of your strategy, I wouldn't get them. Another downside to them is that they're quite heavy.
|
|
#6
|
|||
|
|||
|
Re: Mecanum wheels
Mecanum work well if they fit your game strategy. You can get a full set for much less then $400. Vex pro sells a set of 6" for 159.99 http://www.vexrobotics.com/vexpro/wh...um-wheels.html
Also, in my experience the vex wheels preform much better then the andymark equivalent. |
|
#7
|
||||
|
||||
|
Re: Mecanum wheels
Try VEXpro. They have very affordable yet durable mecanum wheels. The other posters are correct in assuming that unless you are trying to catch, mecanums might not work well this year... However don't believe they are easy to push. We had to play defense with our mecanums last year in matches when our shooter failed and were fine. We could block lots of teams. I know this is contrary to popular belief, but a properly done mecanum drive base can in fact be very strong.
For anyone that wants to question our pushing abilites, we have video... |
|
#8
|
|||
|
|||
|
Re: Mecanum wheels
Quote:
Whether or not this translates to "being pushed all over the field" depends critically on context (robot weight, weight/drive of opposing robot, weight distribution, manner in which you're hit, etc). |
|
#9
|
||||
|
||||
|
Re: Mecanum wheels
My team has used mecanum wheels for the last three competitions, and each time we had great success with our drivetrain.
The system is meant to give a robot high levels of maneuverability, and when it is allowed to move at high speed, it creates a formidable opponent. Having the range of motion provided by a mecanum drive can allow a driver to jump out of the way of onrushing defenders, all while maintaining a scoring opportunity When discussing pushing and mecanum, it should not be forgotten that the goal of this drivetrain is maneuverability, not brute strength. Due to this, a pushing match with a robot designed for pushing will be lopsided. But that does not mean that this drivetrain is easy to push. I have seen our past mecanum drives stop six wheel drives dead, and win pushing matches. When we use mecanum, we maintain a balance of speed and pushing power, and ensure we are not compromising one for the other. This quote sums the entire discussion up, and is good food for thought. "Mecanum drivetrains, like every other, have advantages and disadvantages" - Mr. B |
|
#10
|
|||
|
|||
|
Re: Mecanum wheels
I have a quick question about mecanum wheels. Can they be placed in a trapezoidal configuration?
Has anyone tried this before? How well does it work? |
|
#11
|
||||
|
||||
|
Re: Mecanum wheels
Quote:
---[]----[]--- []----------[] where the [] are wheels and you have the front wheels in narrower (or the back wheels)? |
|
#12
|
||||
|
||||
|
Re: Mecanum wheels
Quote:
|
|
#13
|
||||
|
||||
|
Re: Mecanum wheels
I encourage anyone and everyone who thinks that they understand mecanum physics to read the whitepaper given here: http://www.chiefdelphi.com/media/papers/2759?
|
|
#14
|
|||
|
|||
|
Re: Mecanum wheels
Yes. Something very similar to this. The back wheels would be about 12in apart and the front about 24in apart. The front and back wheels would be about 30in apart.
|
|
#15
|
||||
|
||||
|
Re: Mecanum wheels
Quote:
|
![]() |
| Thread Tools | |
| Display Modes | Rate This Thread |
|
|