Parker E-DC, Hardware Installation Manual

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34 E-DC Hardware Installation Guide Chapter 2 – Installation
6 – M
OUNT THE
M
OTOR
Use the flange bolt holes to mount rotary step motors. The pilot , or center-
ing flange on the motor’s front face, should fit snugly in the pilot hole.
Do not use a foot-mount or cradle configuration, because the motor’s
torque is not evenly distributed around the motor case. When a foot
mount is used, for example, any radial load on the motor shaft is multi-
plied by a much longer lever arm.
Step motors can produce very high torques and accelerations. If the
mounting is inadequate, this combination of high torque/high accelera-
tion can shear shafts and mounting hardware. Because of shock and
vibration that high accelerations can produce, you may need heavier
hardware than for static loads of the same magnitude.
Under certain move profiles, the motor can produce low-frequency vibra-
tions in the mounting structure that can cause fatigue in structural
members. A mechanical engineer should check the machine design to
ensure that the mounting structure is adequate.
WARNING
Improper motor mounting can jeopardize personal safety, and
compromise system performance.
For Compumotor motor dimensions, see Select a Motor earlier in this
chapter.
M
OTOR
T
EMPERATURE
& C
OOLING
The motor’s face flange is used not only for mounting—it is also a heat
dissipating surface. Mount the face flange to a large thermal mass, such
as a thick steel or aluminum plate, which should be unpainted, clean,
and flat. Heat will be conducted from inside the motor, through the face
flange, and dissipated in the thermal mass. This is the best way to cool
the motor. If conduction through the flange does not provide enough
cooling, you can also use a fan to blow air across the motor for increased
cooling.
M
OTOR
M
ODIFICATIONS
Modifying or machining the motor shaft will void the motor warranty.
Contact a Compumotor Applications Engineer (800-358-9070) about shaft
modifications as a custom product.
www.comoso.com