Hey everyone—hope you’re all doing well in the VEX Robotics community! I’m a newbie here, and I just started working on my VEX robot for this year’s challenge. I’m super excited but also got some questions that I hope you can help with. [IMG_6948] So here’s the deal—I’ve got a 4-motor drive syste…

[image] EGHQ: I think you might have thought OP was running 600 rpm direct The drivetrain I was referencing in my post (the one we built): [FirstDrivetrainHalf] [CompletedFirstDrivetrainPIC] gears: 36->60 (36->12->36->60 for the 5.5-watt motor) cartridge: 600 wheels: 3.25 speed: 61 Inc…

I think you will be able to go over the barrier if you add sleds to the front of your bot. Your wheel placement is pretty good so I dont think you will have issues with the drive channels digging into the ground and stopping you from lifting up all the way. As far as 4m vs 6m drive, I would honestl…

If you include a sled, OR, allow one set of your wheels to be exposed, you should be fine. HOWEVER, your drivetrain is undoubtedly too fast. We tried this exact gear ratio with a 55Watt (11Watts more than yours) drivetrain, but it was still too fast; our drivetrain overheated very quickly. I would…

You should use 6M drive if your robot could still do everything else with the 22W remaining. You could definitely get over the barrier if you added sleds. I would also recommend using Nylock nuts instead of keps nuts, because that will make your drive more secure.

My answer, long story short, is that it is almost always good to have 6 motor drive. It does not mean faster, but it means more strength and gives you the opportunity to use faster gear ratios. Either type can probably get over the barrier but for other reasons, I am going with 6 motor drive.

Hmmm. The exact ratio OP is using is 360 rpm with 36:60 on blue motors. This is a standard gear ratio that many teams, including myself, have used. From my experience, this ratio doesnt seem to be uncontrollably fast, as it has a good balance between speed and torque when compared to other ratios fo…

Going over the barrier on that drive won’t be a problem, assuming you mount sleds on the front to ramp the robot up initially. Wheel size generally doesn’t matter that much all things considered (people have gone over on 2.75s). What matters is the wheel’s contact against the pole as you go over. S…

How do you calculate inches per second? What is the inches per second for a 257 RPM on 4" wheels?

To calculate the speed of a robot in inches per second based on its wheel RPM and wheel diameter, you need to determine how far the robot travels in one revolution of the wheel and then determine how many revolutions occur in one second. For every full rotation of the wheel, the robot will travel a…

[image] Catalogue of Drive Gearings Technical Discussion Due to frequent questions and discussions on drive speeds, but not a lot of resources on the layouts of the possible gearings themselves, I’ve created this resource for people to see a catalogue of drive speeds that …

New to VEX: 4 vs 6 Motor Drive and Barrier Concerns

VEX V5 General Discussion General Forum

Micahy321 August 29, 2023, 2:38pm 12