pic: A little CAD practice

[akoscielski3]

My team has never made a chassis that has the wheels on the other side of the frame. I was wondering how you do this? Is it using a hex shaft or what? Could you possibly explain all of this or maybe put up a CAD design to download or even a close up picture. That way i could see how it works and maybe use a drivetrain like this in the future.

Thanks

[steelerborn]

There are a lot of great tensioning systems you could use. Obviously the easiest set-up would be just adding the kop tensioning system. But interesting systems are also around you could look at cam tension systems for the outside wheels. Making the center wheel direct driven would allow only the outside wheels that would need tensioning. I came up with a lot of crazy systems that would all yield the same result. My favorite one used surgical tubing to move the outside wheels farther out. In the end there is no true answer but a endless supply of them. You have all summer, I would say to experiment a little and find a unique solution that is your design. Keep it up.

[MattC9]

Originally Posted by steelerborn

There are a lot of great tensioning systems you could use. Obviously the easiest set-up would be just adding the kop tensioning system. But interesting systems are also around you could look at cam tension systems for the outside wheels. Making the center wheel direct driven would allow only the outside wheels that would need tensioning. I came up with a lot of crazy systems that would all yield the same result. My favorite one used surgical tubing to move the outside wheels farther out. In the end there is no true answer but a endless supply of them. You have all summer, I would say to experiment a little and find a unique solution that is your design. Keep it up.

Stupid question, Theres a KoP tensioning system? because if there is, I would be a very happy man.

Originally Posted by akoscielski3

My team has never made a chassis that has the wheels on the other side of the frame. I was wondering how you do this? Is it using a hex shaft or what? Could you possibly explain all of this or maybe put up a CAD design to download or even a close up picture. That way i could see how it works and maybe use a drivetrain like this in the future.

Thanks

I used a 1/8keyed shaft in the picture and I put an E-clip on the end of the wheel to keep it in place.

Do you still want up close pictures?

[akoscielski3]

Originally Posted by MattC9

I used a 1/8 keyed shaft in the picture and I put an E-clip on the end of the wheel to keep it in place.

Do you still want up close pictures?

I actually was thinking of it while sleeping... and noticed that u can use the key slots. Is everything key slot or no. Also how do you make the slot for the E-clip, is it just done on the lathe?

And is the only thing holding the shaft straight the brace on the side of the tubing + the tube?

[steelerborn]

http://www.andymark.com/product-p/am-0286.htm

These came in the KOP I beleive last year I have no idea if they are still included. The design is from RC he is from team 1323 Madtown robotics. I know there are still some issues with them but these may work for you, they are a great design.

[MattC9]

Originally Posted by steelerborn

http://www.andymark.com/product-p/am-0286.htm

These came in the KOP I beleive last year I have no idea if they are still included. The design is from RC he is from team 1323 Madtown robotics. I know there are still some issues with them but these may work for you, they are a great design.

Ahhhh those, i did have a few of those laying around the shop for awhile but someone (that is pretty good with had tools) got a hold of it and "changed" it a bit so...i can use them. But i can always ask some of our friends to 3D print some of these.

[MattC9]

Originally Posted by akoscielski3

I actually was thinking of it while sleeping... and noticed that u can use the key slots. Is everything key slot or no. Also how do you make the slot for the E-clip, is it just done on the lathe?

And is the only thing holding the shaft straight the brace on the side of the tubing + the tube?

yes, yeas and... yes!

you can easily lathe a slot for an E-clip (shaft collars and retainer clips work just as good)

The way the wheel and axle set up is laid out like this E-eclip W-wheel S-sprocket T-tubing B-bearing mount

E-W-B-T-B-S

[MattC9]

Originally Posted by akoscielski3

I actually was thinking of it while sleeping... and noticed that u can use the key slots. Is everything key slot or no. Also how do you make the slot for the E-clip, is it just done on the lathe?

And is the only thing holding the shaft straight the brace on the side of the tubing + the tube?

E-clip slots would be made on a lathe

All shafts are keyed

There are two braces on the tube, on on the out side and one on the inside, and yes that is the only thing supporting the shaft.

If you or anyone else wants these CAD files I would be more than willing to send them to you. (seriously don't be shy I would love some one to take a close look at this).