pic: 2004 drive 930

[rlowerr_1]

I guess some explanation on this one is needed.

We took apart the drill transmissions to remove the anti reverse pins as usual this year. As I opened the transmission and had all the guts fall out an idea popped into my head. We knew that this year we wanted to have a dual motor drive but when we looked into it over the off season we were quickly turned away from all the special gears and custom parts that would have to be made.

It was so simple I thought… lets just run the cim motor through the drill transmission! With all the planetary gears spilled out on the table we found the calculations for finding the reduction of planetary gears and started counting teeth. And low and behold that by only using the last two stages of gears inside the transmission we calculated that the cim would be running at around 349 RPM compared to our measured value of 335 RPM off the drill in low gear. An almost perfect match that can be calibrated by either monitoring current of both drive motors or by capping the max speed of the motors to match each other.

More info on the actual construction will be posted later.