Here are some of the factors that could cause a "good" and a "bad" mecanum drive to have
different traction:
- type of wheel (model number)
- manufacturing tolerances of wheel
- manufacturing defects of wheel
- improper adjustment of wheel rollers
- improper alignment of wheels on vehicle
- frame warped or too rigid
- poor weight distribution
When it comes to traction, all mecanums are
not created equal