I just thought I'd pass on the method that we just discovered for increasing the speed of the Globe Motor.
There have been several discussions about removing one of the stages of planetary gearing from the Globe Gearbox, but so far they have all required machining of the housing or a special spacer.
Last night we pulled one apart, and came up with a really simple way.
The trick is to remove the function of the second stage of the planetary gear.
We did this by removing the 3 gears around the perimiter of the second stage, and then epoxing the second stage plate to the back of the first stage.
This has the effect of making the first plate, drive the third stage directly.
To keep the second stage parrallel during the gluing process we used three nylon spacers (from this year's FTC kit) in place of the the gears that we removed. First the spacers were glued in place, and then the two plates were glued together. As the glue was curing, we inserted the assembly back into the housing to help with allignment.
For our test we used regular 5 min epoxy, but for production we will probably go with a high PSI epoxy. We used it to run out turret last night, and it ran really fast (too fast
. We did prep the metal before gluing by cleaning and then scoring, but the pins and 1st stage gear are very irregular so the bond seems pretty good.
We won't use this for a high load application.... All in all a very easy modification. (Plus the kids came up with the gluing idea)
Phil.