Quote:
Originally posted by sanddrag
It's not just the time. It's the money. Otherwise my team would be building one right now. We figured it would be about $250 for just gears for one gearbox. Of course that was with some slightly different ratios that we came up with.
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Sanddrag, take my advice and go to your local Motion Industries and get the Martin Gears. We were buying them from Small Parts & Boston and their prices were over twice as expensive as Motion Industries plus they were in stock.
Andy, great job on the prints, to show the level and detail as well as a complete model in Uni-Graphics surely took a great deal of your time, and I for one appreciate it.
I might tinker around with it a bit and see if I can incorporate any of the features we used this year. One thing I really want to test out is the spring loaded shifting linkage with the hobby servo. If I can get it to mount and work on the side of the tranny I will post it to give an alternative to pneumatics. Gear job of eliminating the wire-edm parts, it opens up the design to many more teams.
Along the same lines to teams out there: looking through the design it appears you could make most of the parts on a regular mill with a digital readout. I tried making one of the gears with the pocket dog mates at home on my machine (which is CNC) but I did it by hand with a rotary table and you can do pretty well without the CNC. I can't wait for one of our schools (Troy Athens) to have their CNC machine at school making parts for us this year.
One thing I am not really clear on is the mount of the drill motor. We had to make an aluminum carrier so we could screw into something (Also made a fantastic heatsink too!) , how are yours mounted in the 2003 gearbox? Also love the carrier on the CIM motor, fantastic idea.
Great tranny, ohh so small too.