Thread: Do FisherPrice Gearbox Documents Exist?
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Unread 18-01-2011, 07:34
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Mike Betts Mike Betts is offline
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Re: Do FisherPrice Gearbox Documents Exist?
Quote:
Originally Posted by Alienvin View Post
A little counting and some math.

The FP Motor has a 19T Pinion on it. The FP Gearbox internally is made up of multiple compound gears.

Pinion Gear 19T
Compound Gear 1 (72T Large / 25T Small)
Compound Gear 2 (79T Large / 14T Small)
Compound Gear 3 (45T Large / 12T Small)
Final Gear (38T Large) Connected as a Compound Gear to the Spindle

19T/72T x 20770 = 6008.75RPM
25T/79T x 6008.75 = 1901.50RPM
14T/45T X 1901.50RPM = 591.58RPM
12T/38T X 591.58 = 186.82RPM AT THE DRIVEN SPINDLE.
I get 5481 rpm at the first stage for a total of about 170 rpm. Is the math wrong or did the gear get reported incorrectly?
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Mike Betts

Alumnus, Team 3518, Panthrobots, 2011
Alumnus, Team 177, Bobcat Robotics, 1995 - 2010
LRI, Connecticut Regional, 2007-2010
LRI, WPI Regional, 2009 - 2010
RI, South Florida Regional, 2012 - 2013

As easy as 355/113...