Epson E2C Series Manipulator Manual page 134

Maintenance 5. Replacing the Motors (Joint #4)
(4) Place the U1 belt around the large U2
(5) Loosely secure the Joint #4 motor unit to Arm #2.
NOTE
(6) Apply the proper tension to the U1 belt,
(7) Mount the duct plate on Arm #2.
(8) Connect the connectors X141 and X41.
(9) Re-bundle the cables in their original positions with a wire tie.
(10) Install the arm top cover.
(11) Perform the calibration of Joint #4.
122
pulley and the U1 pulley.
Make sure that the gear teeth of the belt
mesh with the pulleys completely.
Loosely secure the Joint #4 motor unit to Arm #2 so that the motor unit can be moved
by hand, and it will not tilt when pulled. If the unit is secured too loose or too tight,
the belt will not have the proper tension.
and secure the Joint #4 motor unit.
To do so, pass a suitable cord or string
around the Joint #4 motor unit near its
mounting plate. Then, pull the cord using
a force gauge or similar tool to apply the
specified tension shown in the figure on
the right.
Do not allow unnecessary strain on the cables.
For details on the installation method, refer to Maintenance: 3.1 Arm Top Cover.
For details on the calibration method, refer to Maintenance: 14. Calibration.
Motor plate
Tension of U1 belt: 39.2 N (4 kgf)
Adjustable range:
29.4–49.0 N (3–5 kgf)
4-M4×12+Washer, Spring washer
U1 belt
U1 pulley
4-M4×12
+Washer,
Spring
washer
E2C Rev.6