Hello!
I was wondering if anyone knows why our base is stalling? And if so, how to fix it. We have the 3:1 sprocket ratio
There are many possible causes, answering some questions would help diagnose the problem. To me it sounds like it’s due to the 3:1 gearing, but I’m not sure.
- How many motors on the base?
- What is the internal gearing of the motors?
- Have you checked for friction?
- Approximately how heavy is your robot?
If it is 3:1, I would put it back to 1:1. It is generally not good to gear wheels for speed as it often results in not enough torque for the wheels to move causing the base to stall
I agree. It’s probably possible to get away with 3:1 torque with a light bot, but that isn’t neccessary when HS and turbo are available. Not to mention the power loss due to chain.
Is the bot steel
How many motors are you dedicating to it? 3:1 is not that obscene of a ratio. I saw some teams get away with it in NBN. If you are not dedicating >= 6 motors on it, well there’s your problem. If you are and it’s still stalling, I would recommend weighing your robot and doing some basic stall torque calculations to figure out what weight you need to be at.
Are you using the 6 tooth high strength sprockets?
@Easton :
there are four total motors on the base
they are standard speed motors
yes, the wheels are available to move at ease
about 13 lb
no 6 tooth, but we are using 24T high strength and 8T high strength sprockets
we will try moving it back to a 1:1 sprocket ratio. Do you believe it is safe to put 6 total motors, 1:1 ratio, and high speed motors? or is the high speed motors too risky?
@SkinnyPanda Robotics
there are four linear slides on the bot, so those are the only steel items
6 Motors with 1:1 high speed is definitely possible. You could even do Turbo motors with the same configuration. You could even do 4 Speed motors like lots of teams do. Just make sure to avoid friction and you’ll be fine.