Let's Make Robots!

How to do belt-tracks


Just a quick tip on belt tracks, if you'd never did them before, and want to try :)

Simple; one wheel in each side follows a motor, rest is free to turn.

Motors can of course be in same end, but some times it is convenient to have them in each, and that is easy, see the picture.

Belts should always be a little loose, to minimize friction, yuo do not want tight straps.

Cool thing is, you can tun on a plate. And they make a nice, steady base.. and look awsome :)

Uncool thing is they tend to slow things down.

When turning, the tracks has to skid, that is rub over the surface. This is not that efficiant.

You want your tracks to be able to skid over your surface. On indoor systems you should chose hard / plastic tracks, or have a strong motor, or add some tape over the tracks to minimize drag.

  • Tip: When applying tape, make sure to put it on where the wheel is bending the track, a small piece at a time, then turn the wheel, put some more on. If you add tape on the long flat surfaces, a big piece at a time, it will make the tracks too tight.

Hardest thing may be to find the right tracks, but it starts to get easier - look in the components-section.

Get tracking!

 

Billede004.jpg

Comment viewing options

Select your preferred way to display the comments and click "Save settings" to activate your changes.

Try f(x) = 42... should work on anything you throw it at!

I dunno what surface you guys are having the trouble with. I've used these rubber tracks a couple of times and they go straight and turn fine on the street and on a laminate and wooden floor. The only surface I've found that they are truly RUBBISH on is carpet.

The problem is carpet!

And sofas.

And beds.

And tablerunners.

Yes. Mine's rubbish in bed, too (TWSS). Why would you want to take your robot to bed? Anyway - I have the solution. Don't mess with a perfectly good robot: CHANGE YOUR FLOOR! It's a much less painful solution.

Where did you buy those plastic gears. I've been trying to fnd them locally, but can't. I've looked online, but haven't found anyone who has a good assortment. I need different sizes and worm gears for a robot I'm planning on doing after I get an easy one working.

I got bags full! Mail me. 

/ Fritsl

Nice. Here's mine. I do believe those are the same tracks/wheels. Mine uses servos modified for continuous rotation. The Mark II has a 5:2 gear up rather than the 1:1 chain drive. Not autonomous (yet!)

_TrackBotMkI.jpg

_TrackBotMkII.jpg

God created the integers; all else is the work of man - Leopold Kronecker

Oh yes, the same :)

Let me know if you need spare parts, I went over the top, and especially the wheels - I have not a bag, but a sack full! (Seriously; dump me a PM, I would be happy to ship some, I will never get to use them all even if I build robots the rest of my life :) 

And.. The rubber-tracks.. They have so much grip. When you get some weight on top, you will get a much better drive / turn if you tape them up.. Which is why I am using hard plastic for belt tracks only now! 

/ Fritsl

 How do you mean tape them up? Surely tape would reduce the grip? I can see how that would make them turn better, though!!

 God created the integers; all else is the work of man - Leopold Kronecker

SHORT ANSWER, ME BUSY:

http://letsmakerobots.com/node/25 

/ Fritsl