I am wondering what design considerations teams make when using belts or chain on a drivetrain (particularly WCD)
- how do you ensure the belts wont get destroyed?
- how do you determine pulley size to ensure belt teeth don’t shred?
- what causes chain to break / fall off of sprockets?
- what causes sprocket teeth to break off?
610 did a robot showcase with Karthik on first canada live (FIRST Canada LIVE! - March 23rd, 2020 - YouTube)
They apparently had many problems with chain and fixed most of the problems by switching to belts so I am wondering what they might have done wrong with the chain and what they did right with the belts.
Summary of their drivetrain from the video:
- 1x3 box tube
- 6"? Colson wheels
- Chain kept falling off
- Several chains broke
- Sprockets lost some teeth
- Shafts bending the box tube
- Bearing Failure
- They switched to 2x3 box tube to fix the bending issue
- They also switched to belts and i guess they were more reliable
If anyone knows more information regarding sprocket size, pulley size, chain and belt types, etc. that they used that might help.
I found their issues surprising because I see teams like 254 who run 1x2 box tube with 22t sprockets with 25 or 25H chain without much issue.
Note: this is not meant to be a discussion about which system is better but I am looking to solve the “my team tried system A and everything broke so we used system B and it solved our issues”. I want to know why the issues happened in the first place and how it could have been designed better.