MTS Series 247 Actuators - Manual (Page 32)

Series 247 Actuators 32
Spiral Washers
Installation
5. Slowly turn the connector stud into an element of the force train (for
example, the actuator rod). The connector stud should turn freely. If any
resistance is encountered, disassemble and correct the problem before
proceeding.
6. Place the spiral washers together with the spiral surfaces facing each other.
7. Place the set of spiral washers over the connector stud and rotate them until
they are at minimum thickness. Mount the appropriate fixture (load cell,
grip, etc.) on the connector stud and tighten the fixture against the spiral
washers by hand.
8. Repeat Steps 2 through 7 for all spiral washers in the force train of the same
rating.
9. Connect a coupling (dummy specimen) in the force train or install the
actuator into a suitable fixture such that it can withstand a tensile load 10 to
20% greater than the maximum load to be applied to the connector stud
during testing.
10. Select force control with the system controller.
Connector
Stud
Connector
Stud
Medium
Thickness
Spiral Washer Rotation
to Increase Thickness
Do not exceed