Tolomatic User Guide:
IMA-S Integrated Motor Rod-Style Actuator - Stainless Steel
• 18 •
WARNING!
Before installation and commissioning of the equipment, this manual and all accompanying
manufacturer documents and manuals MUST be completely read by the appropriate personnel. All
warning texts must be given special attention.
4 .1 General Operation
The IMA-S actuator functions by translating the rotary motion of the integrated brushless servo motor
into linear motion using a screw mechanism. The linear travel, speeds and forces are controlled in
conjunction with a servo drive.
When ordered, the IMA-S actuator can be configured with any one of the following feedback devices:
Absolute multi-turn HIPERFACE DSL, absolute multi-turn HIPERFACE, absolute multi-turn EnDat2.2,
incremental and resolver. Please confirm that the servo drive supports the selected feedback protocol.
The relationship between the rotary motion of the motor and the linear motion of the actuator
corresponds to the following relationships:
Linear distance traveled = (motor revolutions) * (screw lead)
Linear Speed = ([motor RPM]/60) * (screw lead)
Linear Thrust (kN) = Motor torque (Nm) * 2 * π * pitch (rev/mm) * screw efficiency
or
Linear Thrust (lbf) = Motor torque (in•lb) * 2 * π * pitch (rev/in) * screw efficiency
CAUTION!
Motor continuous current must be maintained at a level below the continuous stall current rating of
the IMA-S actuator or damage to the motor stator will result.
The peak current setting must be maintained at a level below the peak current rating of the IMA-S
actuator or damage to the motor stator will result.
Care should be taken not to exceed the physical travel limits of the IMA-S actuator. Doing so will
cause the actuator to reach mechanical end of stroke internally. Although protected by the end of
stroke bumpers, repeatedly reaching internal end of stroke can physically damage the screw and the
internal components of the actuator.
Mechanical Installation of IMA-S Actuators
4
