Quote:
Originally Posted by Jared Russell
I agree. For 1.6 lbs (plus transmissions and electronics...let's say ~3 lbs total) you can have (2) 775pros generate enough mechanical power to lift a full-weight robot with battery and bumpers vertically at ~3.5 ft/sec (neglecting losses). That's crazy fast, and it gets faster as you add more motors for <1.5 lbs a pop.
You very well may be able to get it lighter/smaller using a PTO, but the coupling between mechanisms means both the drive and the PTO'd mechanism are going have additional design constraints that need to be satisfied (read: less room to adapt if you need to change something down the line).
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Well, there are only 16 breaker spots on the PDP. That is one reason to use a PTO. I know some teams are right up to the max of breaker spots.
6 motor drive leaves 10 spots for other stuff. Sometimes that other stuff uses more than 1 motors.