Quote:
Originally Posted by Abhishek R
I searched some old threads but couldn't find a clear answer.
What is it about a single speed drive train that allows it to accelerate faster than a two gear one? I don't see why it does, but it seems like there should be a technical reason that I'm missing as to why it does accelerate faster.
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As most people have said, it's the gear ratio (or number of motors).
However there is one other thing that makes a bigger difference on acceleration than most realize. That would be the number of rotating components (gears) in the gearbox. Typically a good 1-speed gearbox will have 1 or two stages and have 3-5 gears (2 small pinions). Most shifters have 2-3 stages with 6-9 gears (3-4 small pinions). Not only do the motors have to get the robot moving they also have to get the gears spinning. And in the early stages of the gearbox they don't have the mechanical advantage of multiple gear reductions to increase torque. This is made worse when the gears are steel not aluminum.
Now whether or not that actually creates a noticeable difference, maybe not. However it certainly is something to keep in mind when designing a gearbox.