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Unread 21-08-2015, 20:09
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Purdue University
AKA: Spencer Tickman
FRC #1747 (Harrison Boiler Robotics)
Team Role: Mentor
 
Join Date: Nov 2011
Rookie Year: 2009
Location: Issaquah, Washington
Posts: 253
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Re: Which sensors should be used throughout the robot?

Quote:
Originally Posted by garyk View Post
Oh, geez, let's not do this - anchoring the housing/body of the encoder via securing its wires (and I've seen it). If you're using an encoder with 360 counts/rev for example, a wobble of one degree is one count. Although we're not going to use them ($$$) encoders are available with > 10K counts/rev. and imagine the error if it's poorly mounted. What you are learning (and I'm supposed to be teaching) should be applicable to an engineering job. Please mount encoders such that the threads on its body go through an appropriately-sized hole, and secure it with the lock washer and nut that come with the encoder. Have this in your CAD!

It's a good idea to mark the position of the encoder on its mount by drawing a line (sharpie, etc.) from the body of the encoder onto its bracket/panel, same thing for a pot. That way, if it comes loose (as did ours at Champs in 2010) you can put it back in about the right place, until you have time between matches to accurately remount it.
It seemed to work well enough for 254 😜
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