ArcticCrusher

No worries Ben.

You are incorrect, you can increase the drive pulley diameter a number of ways. One is by increasing the belt thickness to a certain point. The lug height will not affect the belt thickness. Think about it a 1/4 inch belt travels different than a 4" one across the same chain and sprocket drive system.

Someone seems a bit biased.

Like I said leave it alone.

Ben, with all due respect, how many servo systems have you personally commissioned? Leave it alone.

Of course, we still use tachs for final calibrations.

Yes you are correct. We normally tach the speed to a vfd reference to get an exact measurement but it's next to impossible to get that for a sled. Have automated many servos for position, indexing, gearing and camming to know what the variables are.

How so? I was backing you guys.

Yes it does. You will never get that fine a measurement trying to read a sled track but in the world I live in it matters. That is all.

No, the belt thickness changes the final gear ratio by one half of the thickness. It's basic physics.

Yes, 1/2 the difference exactly.

No.

He thinks she will make a great POTUS. Don't really know what to say.

If it changes the overall diameter of the drive system, then it would. Consider changing out a chain system that has a certain pitch to one of the same, that would make no difference, but if you went to a chain with a different height with the same pitch, it could if it changed the overall radius of the drive system.

Again well said. I would much rather be part of a site that accepts SR than one that refuses to join because of him. Even though I don't think much of him. Let him burn his bridges.

You are almost there. So imagine this as your sled drive system using the conveyor drive pulley example. How would a lug height translate to increased linear speed of the belt unless it affects the speed at the drive pulley? It doesn't, the difference in the thickness of one sled belt to another could though and that is a valid argument.

It would be common sense to believe the repairs would have been completed fairly quickly and if there would have been delays no costs should have been incurred. But its hydro so we can throw common sense out the window.

I agree. We don't need a moderated site here, perhaps they do since they can't control their emotions.

Cappy, how would you setup one of these, retracting nosers? I have controlled many.

Here is a simplified example of of typical drive system for a conveyor. The diameter at the drive pulley determines how far the belt will move in one rev. The length of the belt has zero influence. The thickness of the belt will increase the diameter at the drive pulley but in most cases its not much.

The final speed of a conveyor is usually governed by the diameter of its driven roll. Unlike a track, belt thickness does affect the linear speed, but its usually pretty insignificant. Lenth of a conveyor has nothing to do with it. Increase the roll diameter and you increase the linear speed.

Well I would not use a sleds ackward drive system to position a Robot, but its essentially a crude chain and sprocket system.

No, not really. Only if the track was thick enough to change the radius r then the speed at wr would be influenced by it. The speed at wR does change with the lug height but it is never in contact with the ground.