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FRC3928 2013 Butterfly Module

Aren_Hill

By: Aren_Hill
New: 27-07-2015 19:01
Updated: 27-07-2015 19:01
Views: 2063 times


FRC3928 2013 Butterfly Module

Since this got referenced and there wasn't a legitimate picture of it on CD....

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28-07-2015 11:09

Dylan179


Unread Re: pic: FRC3928 2013 Butterfly Module

what kind of hub did you use for the traction wheel?



28-07-2015 11:44

pmangels17


Unread Re: pic: FRC3928 2013 Butterfly Module

Since your cylinder mount doesn't pivot, could you go into some detail about how you attach the cylinder to the module?



28-07-2015 11:51

AdamHeard


Unread Re: pic: FRC3928 2013 Butterfly Module

Quote:
Originally Posted by pmangels17 View Post
Since your cylinder mount doesn't pivot, could you go into some detail about how you attach the cylinder to the module?
It just pushes on a standoff. There is some sideways sliding contact but it's a non-issue.



28-07-2015 12:49

josesantos


Unread Re: pic: FRC3928 2013 Butterfly Module

Quote:
Originally Posted by AdamHeard View Post
It just pushes on a standoff. There is some sideways sliding contact but it's a non-issue.
If you're having trouble visualizing, you can check out this video of 3847's modules from 2014:

https://www.youtube.com/watch?v=GF_CP-9eMDY



28-07-2015 16:54

pmangels17


Unread Re: pic: FRC3928 2013 Butterfly Module

Ah, that does seem like the simplest solution. Thanks!



28-07-2015 23:16

Aren_Hill


Unread Re: pic: FRC3928 2013 Butterfly Module

Quote:
Originally Posted by Dylan179 View Post
what kind of hub did you use for the traction wheel?
In this instance the traction wheel was made from a solid piece of 2.5" diameter Delrin, the Pulley was milled into the side, and two 3/8" bearings were pressed into it.
Had access to a CNC mill, decided to minimize the part count and not require ordering a pulley.

-Aren



29-07-2015 16:14

DampRobot


Unread Re: pic: FRC3928 2013 Butterfly Module

And now I know where Adam got his 2013 offseason drivetrain design.



01-08-2015 20:54

kitare102


Unread Re: pic: FRC3928 2013 Butterfly Module

What would someone look for if they were trying to find an extrusion like you guys used for the main structure of these rails? As well, how are you planning to connect the frame up once both side rails are completed? The pattern of those holes looks like it would be great for designing attachment points.



03-08-2015 21:50

bstew


Unread Re: pic: FRC3928 2013 Butterfly Module

Quote:
Originally Posted by kitare102 View Post
As well, how are you planning to connect the frame up once both side rails are completed? The pattern of those holes looks like it would be great for designing attachment points.
As this was our 2013 robot, you can see how the frame was designed to be assembled here.



03-08-2015 21:58

Aren_Hill


Unread Re: pic: FRC3928 2013 Butterfly Module

Quote:
Originally Posted by kitare102 View Post
What would someone look for if they were trying to find an extrusion like you guys used for the main structure of these rails? As well, how are you planning to connect the frame up once both side rails are completed? The pattern of those holes looks like it would be great for designing attachment points.
Also for reference this is 3"x3" x .125" wall Aluminum tubing, nothing special.
Online metals has it but a local supplier will give a better price.

-Aren



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