search

JaredC01 / Galileo2

GNU General Public License v3.0
469 stars 62 forks source link

Gear Ratio Question: Isn't It 8:1 instead of 9:1? #75

Closed ecoinomist closed 2 months ago

ecoinomist commented 2 months ago

So I counted the gear teeth as illustrated in the manual. There is a 9 teeth gear for the motor shaft, which drives the three inner gears with 31 teeth, that in turn spins the housing with 72 teeth. This results in:

72/31*31/9 = 8:1 gear ratio

Have I miscalculated something, or has it been overlooked? The docs says to put 9:1 gear ratio into printer config.

JaredC01 commented 2 months ago

Your calculation method is incorrect. While the number of teeth on the sun gear and number of teeth on the ring gear are correct, you're forgetting the rotation of the carrier itself.

The easiest way to calculate the ratio for this type of gearbox is: (Ring Gear Teeth / Sun Gear Teeth) + 1. That results in a 9:1 ratio for Galileo 2.

ecoinomist commented 2 months ago

Thank you, I was just watching this on Youtube, and indeed that's the case.