One speed vs Two speed gearboxes

[thefro526]

Originally Posted by Ekcrbe

I know that for the last few years, we've had high/low splits of right around 3:1 and free speeds of ~5/15 FPS, and I can't imagine wanting them to be any closer together than that. Even with only 4 CIMs, starting in high gear is fine and low can be almost exclusively reserved for pushing and fine control. A simple software adjustment like squaring the drive joystick values makes control in high gear noticeably more manageable, and if we were to change anything, I would say we would try to push it faster before deciding to slow it down.

The information in my post was intended to be used as a guide, rather than a matter of fact. When all things are considered (specifically wheel type, robot weight, rotating mass weight, strategic intent) a drivetrains specifics should naturally fall into place.

That being said, history (2013 newton) tells me that 68 is no stranger to getting across the field quickly, so if the application is similar, there's no doubt in my mind that your data is spot on.

Going back to my original post, much of drive design beyond the basic 90-95% or so (essentially optimization of the system) is very application specific, and is best catered towards a robot and it's driver. So no matter what, much of this data should be taken as a starting point, and adjusted from there. Enough adjustment, and you might just attain perfection... If you've got the time.