2700-4001_22 IMA Manual
45
Last Revision: 12/14/2021
6:
IMA
O
PERATION AND
S
TART UP
C
ONSIDERATIONS
6.1 Attaching Cables & Homing / Mechanical Travel Limits
1.
Carefully align each cable connector with the respective motor connector.
2.
Fully seat the feedback and power connectors.
3.
Verify continuity and functionality of the thermal switch signals, TS+ and TS-. These signals are
transmitted through the cables that connects the motor to its motion control system.
4.
When homing the Tolomatic IMA Actuator avoid excessive force. During homing do not exceed
20% of continuous thrust or speeds of 0.1 in/sec (2.5 mm/sec).
Exceeding these
recommendations can cause permanent damage to the actuator.
Careful attention should
always be taken to prevent exceeding the physical limits of the actuator.
The mechanical travel limits of the actuator must be verified to ensure the actuator will not reach an internal hard
limit during normal operation. The end of stroke bumpers should NOT be engaged during normal programmed
servo actuator operation.
6.2 Brake
In all vertical application an un-powered Tolomatic IMA Actuator will require a brake to maintain position. Tolomatic
recommends that the nominal back drive force specification (listed on page 52) be used for reference only. Back
drive force is subject to change throughout the life of the actuator, due to mechanical break in, ambient
temperature, and duty cycle variation.
A brake can be used with the actuator to keep it from backdriving, typically in vertical applications. A brake may be
used for safety reasons or for energy savings allowing the actuator to hold position when un-powered.
The optional Spring-Applied / Electronically-Released Brake typically requires 24 V power. The brake is spring
engaged and electrically released.
DO NOT attempt to operate the actuator with the brake applied. Allowing the actuator to operate with the brake
applied may cause serious damage to the actuator and/or the brake. Do not use the brake to support heavy loads
while an operator is under the load. Provide another means to lock the load in position. The brake is a spring
applied friction mechanism and does not provide a positive lock.
Protecting the brake from voltage transients in applications where it will be engaged and disengaged frequently is
advised. The use of a rectifying diode and zener diode will provide optimal protection against these transients.
Figure 6.1: Fastest Engage / Disengage time, least protection
