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Follower Wheel

By: Sh1ine
New: 31-10-2015 10:00
Updated: 31-10-2015 10:00
Views: 1420 times


Follower Wheel

Last year Chris is Me designed a set of follower wheels for our first Mecanum drive. They worked incredible well to measure actual distance traveled. I felt like redesigning the system to be printed with our Makerbot X2. This would be mounted on the inside of the chassis and protrude through the belly pan and spring loaded to make sure that they make good contact with the ground.

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31-10-2015 13:46

asid61


Unread Re: pic: Follower Wheel

That looks beautifully integrated! any reason why you chose to use the large gear on top instead of a small gear and a multiplier in code?



31-10-2015 15:35

Jay O'Donnell


Unread Re: pic: Follower Wheel

Quote:
Originally Posted by asid61 View Post
That looks beautifully integrated! any reason why you chose to use the large gear on top instead of a small gear and a multiplier in code?
Probably so it would clear the encoder. VEX gears increase in size in 1" increments.



02-11-2015 02:44

JackFisher


Unread Re: pic: Follower Wheel

Do you have a sort of spring to keep it driven into the ground? Also, be very careful in making sure it deploys 100%. 973 used them in 2013 for their 6wd and in quarterfinals at champs, 1 follower wheel didn't deploy and that cost us the match. Don't want your team to learn that the hard way.



02-11-2015 08:00

Sh1ine


Unread Re: pic: Follower Wheel

Quote:
Originally Posted by asid61 View Post
That looks beautifully integrated! any reason why you chose to use the large gear on top instead of a small gear and a multiplier in code?
Quote:
Originally Posted by Jay O'Donnell View Post
Probably so it would clear the encoder. VEX gears increase in size in 1" increments.
Jay is right, two 60 tooth gears are the smallest stock gears to clear the wheel and encoder. We may try to 3d print a smaller gear, but the additional distance between gears also allows for more material to hold the frame together.

Quote:
Originally Posted by JackFisher View Post
Do you have a sort of spring to keep it driven into the ground?
Yes, we would either use a rubber band or use a spring to make sure it is down. It always be deployed, we would just need to make sure that it moves smothly. Once we make a bracket to attach it, we will see how smooth it is. We may need to make some adjustments, but it shouldn't be too hard to make it move smoothly.



02-11-2015 13:34

JesseK


Unread Re: pic: Follower Wheel

How wide is it at the widest point? Wondering if it'd fit between a WCD frame and the bumper.



02-11-2015 15:24

Sh1ine


Unread Re: pic: Follower Wheel

Quote:
Originally Posted by JesseK View Post
How wide is it at the widest point? Wondering if it'd fit between a WCD frame and the bumper.
The widest point is 2.25".



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