Harmonic Drive MMA Series, Manual, Page: 43 / 62

3-2 Notices on handling
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3-2 Notices on handling
Practice caution and observe the following notices when handling MMA series motors.
(1) Do not apply any excessive force or impact, especially to the motor's
output shaft.
(2) Do not place MMA series motors on a table, shelf, etc., where the motor
could easily fall.
(3) Do not connect the motor terminals directly to the power supply. The motor
may burn out and cause a fire or electric shock.
(4) The allowable storage temperature is -20 to +60
℃
. Do not expose the
motor to direct sunlight for long periods of time or store it in areas at low
or high temperatures.
(5) The allowable relative storage humidity is 80 % or less. In particular, do not
store the motor in a very humid place or in areas where there are large
temperature changes between day and night.
(6) Do not use or store the motor in locations subject to flammable or
corrosive gases or dust particles.
(7) The large model (MMAA21A) is heavy. Handling these models may cause
lower back pain, or injury if the motor drops or topples and you are pinned
underneath. Handle your motor with due care by wearing safety shoes,
take other proper precautions, and also use supporting jigs.
Installation and transmission torque
Examples of motor assembly are shown below. Use high-tension bolts and tighten them with a torque
wrench to control the tightening torque. Use flat washers because the tightening torque is high and the
motor flange is made of aluminum.
Motor assembly example
Assembly example 1
Assembly example 2
CAUTION
Motor fixing parts
Motor fixing parts
Fixing washer
Fixing washer
Output shaft fixing parts
Output shaft fixing parts