I'm designing a three motor gearbox right now (2 Cim and 1 minicim), so I designed an excel chart to help me figure out the total gearing I need for the robot and some other specs. I am totally lost. I based my calculations from the information given here (
http://www.instructables.com/id/Unde...arbox-Design/). What am I doing wrong? Is there other variables that I need to consider?