pwnageNick
28-07-2016, 21:21
Okay, last one for a while I promise. This one is actually useful, unlike the 1.625" wheel one. This is a good setup to test some different things with a 775 drive, as it allows us to test anywhere from 4-8x 775s and see how the drive performs.
22.34lbs, with everything in picture. Only missing rivets.
12:60 32DP gear reduction off the motors.
16:70 20DP gear reduction to the wheel.
Theoretical free speed of 14.94fps; adjusted of 12.1fps.
The second gear reduction can also be switched to either of the following:
20:66; theoretical free 19.81fps; adjusted 16.05fps
14:72; theoretical free 12.71fps; adjusted 10.3fps
4"x1.5" VEX Colson wheels, 18T #25 sprockets with 12.768" spacing between wheels.
Tubing for testing will probably not actually be lightened, and a custom belly pan will probably not be manufactured (plywood or polycarb instead).
Custom parts include the gearbox plate for each side, 5 shafts cut to length per side (middle wheel shaft turned down on end to couple encoder), and side drive tubes. In this version I turned down the standoffs mounting the gearbox to be able to clamp around drive tube, but could just be a normal standoff to mount if desired.
Imgur Album (http://imgur.com/a/IcRth)
Questions/comments welcome. Let me know if you're interested in the CAD model, or would just like the print for the single gearbox plate.
22.34lbs, with everything in picture. Only missing rivets.
12:60 32DP gear reduction off the motors.
16:70 20DP gear reduction to the wheel.
Theoretical free speed of 14.94fps; adjusted of 12.1fps.
The second gear reduction can also be switched to either of the following:
20:66; theoretical free 19.81fps; adjusted 16.05fps
14:72; theoretical free 12.71fps; adjusted 10.3fps
4"x1.5" VEX Colson wheels, 18T #25 sprockets with 12.768" spacing between wheels.
Tubing for testing will probably not actually be lightened, and a custom belly pan will probably not be manufactured (plywood or polycarb instead).
Custom parts include the gearbox plate for each side, 5 shafts cut to length per side (middle wheel shaft turned down on end to couple encoder), and side drive tubes. In this version I turned down the standoffs mounting the gearbox to be able to clamp around drive tube, but could just be a normal standoff to mount if desired.
Imgur Album (http://imgur.com/a/IcRth)
Questions/comments welcome. Let me know if you're interested in the CAD model, or would just like the print for the single gearbox plate.