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-   -   Would this Encoder work? and Encoder Recommendations (http://www.chiefdelphi.com/forums/showthread.php?t=152155)

MoistRobot 02-11-2016 13:47

Re: Would this Encoder work? and Encoder Recommendations
 
Another mounting option for this encoder is to drill a slightly loose hole in the end of the drive shaft to fit the encoder shaft, then cut a slot in the end of the drive shaft to split it and use a clamping shaft collar to hold the encoder securely in the end of the shaft. Works well and can remove/swap the encoder with ease.

tr6scott 02-11-2016 14:00

Re: Would this Encoder work? and Encoder Recommendations
 
Quote:

Originally Posted by asid61 (Post 1614782)
"Bulletproof"? I have always found the S4 series to be pretty fragile, with some of them unexpectedly stopping function on a regular basis.
If you want a bulletproof encoder, you're better better off with a Grayhill or an AMT-103/102. Both of those I have seen take serious abuse without failures.

We have our first ones still functioning on our 2014 bot Turbo, and haven't had a failure yet. . . Prior to that we used the AM http://www.andymark.com/E4T-OEM-Mini...-p/am-3132.htm

and had issues with the students assembling.

We have never used Grayhill, so maybe they are even better, YMMV?

jderrick 02-11-2016 14:25

Re: Would this Encoder work? and Encoder Recommendations
 
We have used grayhill encoders the past two years and have not had any issues. We have also used surgical tubing to connect the encoder to an output shaft effectively.

They can be a bit hard to find come build season but we have been purchasing them from mouser. par number 63R256 is a 256 count encoder but there are others.

billbo911 02-11-2016 15:53

Re: Would this Encoder work? and Encoder Recommendations
 
Quote:

Originally Posted by Type (Post 1614774)
So how does PPR affect the code when using a drive train? I've seen some that are rated for like 5k and others that top out at 360. Im assuming you would use one that hits 5k for a shooter, but would a 360 CPR (or PPR) be enough for a drive train to be accurate.

Choosing what PPR you want to use is like many things in engineering, it depends.
Generally speaking, Low RPM favors higher PPR and vice verse. That is a GENERAL rule, not a hard and fast one. Again, it depends. It depends on what you want to do, control speed, distance, or both. What also plays into the decision is what control method you are using. There are trade offs with every choice.
The best thing you can do is test out different approaches during the off season.


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