Quote:
Originally Posted by AdamHeard
Sprockets go in that gap (for a WCD team).
There are valid reasons for all the points you're raising, and your assumption that because you do not immediately understand them they must be silly/wrong is unfair.
|
You're right. These vex people are pretty darn smart, and I'm not saying I think their designs are silly, I just don't understand them. So, I've reworded my thoughts as questions.
1.) We are doing a drive system where the wheels are driven, by chains, so that the sprockets run through the gearbox. We are using #25 chain and we have about 0.75" extra room. I think the extra space is for a team who wants to use a WCD with two 15 mm belts, as the space is slightly bigger than 30 mm.
2.) Why is the shifting slot longer than the travel of the cylinder? Does anybody know the advantage to having this be around 2x longer than a traditional setup?
3.) The traditional dog gear enters into the gear 0.125", so that you can have a 0.125" pocket in a 0.375" gear while keeping 0.25" remaining for a normal sized bearing. The vex dog gear has the bearing sticking out the back a little bit so that there is more engagement between the dog and the gear. When doing this, you loose the advantage of having the flange on the bearing. Does anybody know why this is?
4.) Why aren't there fillets on the dog/dog gear? I'm not talking about the ones on the outline of the dog pocket, but between the face of the gear and the vertical face of the pocket. A while ago, I made some of these dogs out of steel. Switching to a ball nose endmill and getting even a small radius on all the corners fixed our shattering dog problem.