Quote:
Originally Posted by rich2202
My team is Andymark fans. They assume Andymark stuff will take the beating of a normal FRC competition. I'm sure once we gain experience with transmissions, they will be more open to other options.
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If it were me on your team, I'd be lobbying for the Vexpro ball shifters as well, they're $100 cheaper and over a pound lighter, and the pneumatic cylinder for shifting the Vexpro model is included with it.
Now you do have to use hex shafts with it, and buy special bearings, but that does give you the advantage of not having to deal with keys.
Quote:
Originally Posted by rich2202
I assume the 4.0:1.0 ratio is when you want a lot of power to push around another robot, or fine motor control (such as when balancing). Whereas, the 2.6:1.0 gives you a little more control when driving slow.
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4:1 is better for pushing power, control, and acceleration
2.6:1 is better for speed and.... speed (gotta go fast).
But both those ratios look a bit high unless you're using really small wheels.
For a drivetrain with 6" wheels, the Vexpro's 2-stage ratios would make much more sense. You have to remember you will only travel a max of 60 feet in any given maneuver, and for most games you're going to be in low gear most of the time unless you're doing something like cycling in 2013.