Step 4: The Gear Train
The spreadsheet shows the calculations of the gear ratios needed. I started with a 3 axle minute hand, but moved to a 4 axle to keep the size of the gears down.
To make a minute hand, you need a gear ratio of 60 between the Escapement axle and the Minute Hand axle. For an hour hand, you will need a gear ratio of 12 from the Minute hand to the hour hand.
The spreadsheet shows the formula and the calculations to get the number of teeth for each gear. By using the spreadsheet I was able to plug in different number of teeth for each gear and pinion to try to get the Gear Ratio needed.