Epson ES Series - Page 182

9. Replacing the Ball Screw Spline Unit Part 2: Maintenance
170
(6) Fit the U2 belt around the U3 and small U2 pulleys. Fit the Z belt around the Z2 and
Z1 pulleys. Ensure that the gear grooves of the belts and pulleys engage properly.
Also, for the U1 belt around the U1 and rage U2 pulleys, ensure that the gear groves of
the belt and pulleys are engaging properly.
Z belt
U2 belt
Small U2
p
ulle
y
Z2
p
ulle
y
U3
p
ulle
y
Z1
p
ulle
y
Lar
g
e U2
p
ulle
y
U1
p
ulle
y
U1 belt

(7) Position the Joint #3 motor plate, Joint #4 countershaft unit and Joint #4 motor plate
on the arm. Be careful not to slip the belts from the pulleys while maintaining proper
interval between the units. Mount them loosely for the time being using the following
bolts: 4-M4×10 for the Joint #3 motor plate; 2-M4×12 for the Joint #4 countershaft
unit; 4-M4×10 for the Joint #4 motor plate.
4-M4
×
10
2-M4
×
12
Joint #4 countershaft unit
Joint #4 motor plate
4-M4
×
10
Joint #3 motor plate