I am working on a spreadsheet to compare speeds(in inches/second) with different wheel sizes, gear ratios, and motor cartridges. While it includes flex wheel specific sizes and can be used for comparing speeds of other mechanisms it is made primarily for drivetrains. In order to make this more useful my next step is to in some way annotate the most common/viable drive ratios in the sheet.
So here is my question what are all of the common/good drive speeds for each different wattage amount mainly 44, 66, and 77 watt drivetrains.
ALso the spreadsheet has comments enabled so feel free to give any suggestions on here on on the sheet on how I can make it better or more user friendly.
I know you shouldn’t do 44 watt drive trains but in some games teams can be forced by things such as lack of access to pneumatics(Best example might be spin up which really would have been hard to do with only 2 motors for mechanisms if you didn’t have pneumatics). So I’m trying to find the best speeds for each.
Not necessarily, my team runs 333 rpm on 3.25 inch wheels with 44 watts and it’s a pretty good drive speed. It doesn’t overheat very easily (Or maybe my results are skewed from using a 2 motor 4 inch drive last year) and has enough pushing power to push most robots around.
also wattage should not be directly linked when deciding on a drivetrain speed. weight has a huge role in this desision as well as your gonna wanna maintain decent acceleration and reduce burn out. for example a 10 pound 44w robot can run a speed alot faster than a 40pound 66w robot (obviousley a little exagerated) but there is kinda some common ranges you should fall into.
for 66w which iahve the most expirience with this is the rules i follow:
0-12pounds (ideal faster so between 75 - 86 ip/s)
12-15 pounds (68-77) in/s
15-22 (60-68 in/2)
25+ (realistically consider a readesign cuz this is really fat but dont run faster than 65in/s unless your doing crazy 8m pto transmisison shenaingans)
333 RPM is imo reasonable, We ran it this year, its got a bit much torque and a bit less speed but it is a very nice drive. We didn’t have any blue cartridges and so that’s what we ended up having to do. You won’t be the fastest bot but as long as you have a good manipulator and a good driver you can still do great with that drive. In the future I plan on upping that speed so we can be a bit faster. The torque is nice because if you are in the same place at the same time as someone you’ll win the pushing battle and the acceleration for short distance plays is nice. However overall I’d run a faster drive. I personally would always run 66w drive over 44w, I think you don’t need more than 2 motors (unless you don’t have pneumatics) and that extra drive power is always better.