Page 243 - Making things move_ DIY mechanisms for inventors, hobbyists, and artists

Chapter 7 Bearings, Couplers, Gears, Screws, and Springs 221

FIGURE 7-33 Placing circles for the gear base

b. Copy one of the circles inside the gears, and paste two of them about 2 in
apart on the lower part of the template. Select the one farthest to the left,
change the x coordinate in the toolbar to 3 in, and then press ENTER. Your
screen should look like Figure 7-33.
c. Use the same procedure to place the second circle to the right of the first
with an x coordinate of 4.783. This is the center distance you calculated
(1.783) added to the x coordinate of the first circle (3.000).
d. Draw a rectangle around the two circles to complete the base. Align the
rectangle with the two circles, as shown in Figure 7-34.