tipsmiller
16-02-2012, 23:32
Just about done now. Everything is ready except for a few plastic bits, weighing in at a comfortable 108.8 lbs.
http://farm8.staticflickr.com/7180/6889681811_855df96f1b.jpg (http://www.flickr.com/photos/tipsmiller/6889681811/)
This is the first year in a long time that 159 hasn't had to frantically cut weight at the end of the season.
http://farm8.staticflickr.com/7188/6889680933_a3d21afd76.jpg (http://www.flickr.com/photos/tipsmiller/6889680933/)
Also for the first time in a while, we machined our own two-speed gearboxes, using AM shifter gears and custom shifters. We are also using high-quality S6 encoders from US Digital, which are WAY better than any other encoders we have tried. They come in their own casing!
http://farm8.staticflickr.com/7047/6889678117_814e556e53.jpg (http://www.flickr.com/photos/tipsmiller/6889678117/)
The (arguably) coolest part of our robot is the acentric bearing blocks. These fit into the 2-inch holes on our robot, and the center of the holes in the bearing blocks is 1/16 inch off of the center in both X and Y. This allows us to have 1/8 inch center drop, and then (once the chain wears) re-tension the chain by rotating the block 90 degrees. These bearing blocks were inspired by similar mechanisms to hold the bottom bracket on a single-speed bike and keep the chain tensioned.
http://farm8.staticflickr.com/7056/6889792327_dbd32f429b.jpg (http://www.flickr.com/photos/tipsmiller/6889792327/)
EDIT: We also used these custom gearboxes on our lift system:
http://www.chiefdelphi.com/forums/showthread.php?t=102618
http://farm8.staticflickr.com/7180/6889681811_855df96f1b.jpg (http://www.flickr.com/photos/tipsmiller/6889681811/)
This is the first year in a long time that 159 hasn't had to frantically cut weight at the end of the season.
http://farm8.staticflickr.com/7188/6889680933_a3d21afd76.jpg (http://www.flickr.com/photos/tipsmiller/6889680933/)
Also for the first time in a while, we machined our own two-speed gearboxes, using AM shifter gears and custom shifters. We are also using high-quality S6 encoders from US Digital, which are WAY better than any other encoders we have tried. They come in their own casing!
http://farm8.staticflickr.com/7047/6889678117_814e556e53.jpg (http://www.flickr.com/photos/tipsmiller/6889678117/)
The (arguably) coolest part of our robot is the acentric bearing blocks. These fit into the 2-inch holes on our robot, and the center of the holes in the bearing blocks is 1/16 inch off of the center in both X and Y. This allows us to have 1/8 inch center drop, and then (once the chain wears) re-tension the chain by rotating the block 90 degrees. These bearing blocks were inspired by similar mechanisms to hold the bottom bracket on a single-speed bike and keep the chain tensioned.
http://farm8.staticflickr.com/7056/6889792327_dbd32f429b.jpg (http://www.flickr.com/photos/tipsmiller/6889792327/)
EDIT: We also used these custom gearboxes on our lift system:
http://www.chiefdelphi.com/forums/showthread.php?t=102618