DEWBOT IX Drive Train
From DEW Robotics
Revision as of 12:51, 5 February 2013 by MaiKangWei (talk | contribs)
Due to the anticipated strong defensive nature of Ultimate Ascent, the team decided on 11-January to utilize pivot drive again. In addition, to maximize agility, this drive would utilize our new Oscelot control code.
Issues with the 2012 pivot design
Developments on the 2012 pivot design
Development of the 2013 pivot design took place through a number of physical tests and engineering excercises during the latter half of 2012.
The following design changes were made:
- Switched back to BaneBots RS540 motor in lieu of RS395
- Replacing 35 chain with 25 chain - 9T & 24T sprockets replaced with 12T & 32T - 44 link 25 chain reduces pivot cage height
- Change wheel to AndyMark 4" HiGrip Wheel (am-2256) - 32T sprocket secured w/ 10-23 x 5/8" SHCSs - No sprocket spacers needed
- Adopted the VexPro 32T sprocket
- Narrow pivot cage from 4" to 3.184" - machined acetal spacer eliminated - shorter axles
- Pivot tube designed to be welded into the pivot top
- Drive miter gear shortened axially by 0.25" - further reducing pivot cage height
- Elimination of (1) of (2) E-clips on the pivot tube
- Reduce spacer length between module plates to 1.75" (2" in 2011; 1.875" in 2012)
- Use Deaver steering motor attachment
- E-clip securing the 56T HTD5 pulley
- Reduce pivot mount points from (5) to (4) and replace locknuts with rivet nuts on frame
- 7075 Al replaced 6061 in the pivot braces and the module top plate
