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  #16   Spotlight this post!  
Unread 31-08-2013, 21:26
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Re: Team 254 Presents: 2013 Build Blog

One of the things that impressed me reading through this was how much care and effort was put into manufacturing prototypes-- 254's prototypes (from the videos) looked nicer and worked better than most of my team's finished mechanisms! Excuse me while I learn again why 254 is a world-class team.

This was a real treat to read.
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Unread 01-09-2013, 07:07
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Re: Team 254 Presents: 2013 Build Blog

"Lab closing time for the night was… 11:30 AM (Yes, AM)"

Apparently you folks put in some late nights and early mornings this past season.

These blogs are absolutely fascinating. It's great to see inside the Cheesy Poofs' shop and get a look at just how organized and hard working the team is.
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Unread 01-09-2013, 21:40
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Re: Team 254 Presents: 2013 Build Blog

WOW. Just simply, wow.

That was a great read! It's on the list of things to do prior to kickoff.
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Unread 04-09-2013, 11:44
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Re: Team 254 Presents: 2013 Build Blog

Quote:
Originally Posted by ttldomination View Post
Right, except that it's apparently not visible past day 11 on FF and Chrome. Or at least, that's how it is for me. I suppose I'll just jump to IE. *sigh*
The scrolling issues have been fixed. Sorry about that.
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Unread 08-09-2013, 15:01
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Re: Team 254 Presents: 2013 Build Blog

I'm interested in some more details regarding the encoders on the drivetrain. They look to be US Digital S4 encoders, however I don't see a mount for the body, how are they mounted to the frame?

Kelly
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Unread 08-09-2013, 15:53
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Re: Team 254 Presents: 2013 Build Blog

Quote:
Originally Posted by kellymc View Post
I'm interested in some more details regarding the encoders on the drivetrain. They look to be US Digital S4 encoders, however I don't see a mount for the body, how are they mounted to the frame?

Kelly
As far as I know many west coast teams drill a hole into the drive shaft, push the encoder into the hole, and then zip tie the wire to the belly pan. No mount is needed.
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Unread 08-09-2013, 16:14
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Re: Team 254 Presents: 2013 Build Blog

Quote:
Originally Posted by MICHAELABICK View Post
As far as I know many west coast teams drill a hole into the drive shaft, push the encoder into the hole, and then zip tie the wire to the belly pan. No mount is needed.
It's how we did it for our offseason robot. It's great. The only word of caution is to make sure you've got a good fit between the hole and the encoder shaft. If its too loose, it will easily fall out. If its too tight, you'll bend the shaft when trying to insert it. We marred up the encoder shafts using vise grips to make it easier to get a nice press fit.
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  #23   Spotlight this post!  
Unread 08-09-2013, 18:48
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Re: Team 254 Presents: 2013 Build Blog

Quote:
Originally Posted by MICHAELABICK View Post
As far as I know many west coast teams drill a hole into the drive shaft, push the encoder into the hole, and then zip tie the wire to the belly pan. No mount is needed.
Correct, we do this almost everywhere.

Sometimes we use a standoff as a post next to the encoder body to make it easier to lock torsionally.
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Unread 08-09-2013, 19:05
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Re: Team 254 Presents: 2013 Build Blog

Quote:
Originally Posted by MICHAELABICK View Post
As far as I know many west coast teams drill a hole into the drive shaft, push the encoder into the hole, and then zip tie the wire to the belly pan. No mount is needed.
So if I'm understanding this correctly, the encoder is just floating or resting on something?
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  #25   Spotlight this post!  
Unread 08-09-2013, 19:10
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Re: Team 254 Presents: 2013 Build Blog

Quote:
Originally Posted by Gregor View Post
So if I'm understanding this correctly, the encoder is just floating or resting on something?
It's generally just floating, with whatever's holding onto the wire (typically a ziptie) providing the tiny amount of force needed to keep the encoder from spinning with the axle.

The idea behind this is to not mechanically over-constrain the encoder, as rigidly mounting the encoder as well as pressing its shaft into the axle would do.
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Unread 08-09-2013, 20:12
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Re: Team 254 Presents: 2013 Build Blog

Quote:
Originally Posted by AdamHeard View Post
Correct, we do this almost everywhere.

Sometimes we use a standoff as a post next to the encoder body to make it easier to lock torsionally.
Do you guys have any pictures of said West Side sorcery? We East Side folks be wondering.
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Unread 09-09-2013, 02:03
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Re: Team 254 Presents: 2013 Build Blog

Quote:
Originally Posted by BrendanB View Post
Do you guys have any pictures of said West Side sorcery? We East Side folks be wondering.
You can sort of see it here. Look at the last picture in the original post. There's no mount. The bore for the encoder is a tight fit (just under press fit) and the encoder wire is zip tied to the baseplate.
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  #28   Spotlight this post!  
Unread 09-09-2013, 08:55
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Re: Team 254 Presents: 2013 Build Blog

Quote:
Originally Posted by BrendanB View Post
Do you guys have any pictures of said West Side sorcery? We East Side folks be wondering.
Here's the best shot I saw on 254's blog.
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Unread 09-09-2013, 09:10
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Re: Team 254 Presents: 2013 Build Blog

Quote:
Originally Posted by Joe G. View Post
That looks mighty...sketchy. I suppose the fact that so many people use this method speaks to its validity, but doesn't the encoder want to spin with the axle? While I expect that the zipped down wires help some of that, I can't help but think that there's a little wiggle in there.

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Unread 09-09-2013, 09:36
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Re: Team 254 Presents: 2013 Build Blog

Quote:
Originally Posted by ttldomination View Post
That looks mighty...sketchy. I suppose the fact that so many people use this method speaks to its validity, but doesn't the encoder want to spin with the axle? While I expect that the zipped down wires help some of that, I can't help but think that there's a little wiggle in there.

- Sunny G.
Even if it does wiggle, it really can't wiggle enough to mess up 15 seconds of driving.
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