Chapter 3
3-6
System Design and Installation
■ Other Precautions
• Do not apply commercial power directly to the Servomotor. The Servomotors run on synchronous
AC and use permanent magnets. Applying commercial power directly will burn out the motor coils.
• Take measures to prevent the shaft from rusting. The shafts are coated with anti-rust oil when
shipped, but anti-rust oil or grease should also be applied when connecting the shaft to a load.
• Absolutely do not remove the encoder cover or take the motor apart.
The magnet and the encoder
are aligned in the AC Servomotor. If they become misaligned, the motor will not operate.
3-1-3 Reduction Gears
■ Installation
• Use only the specified combinations of Servomotors and reduction gears. Using a combination that
is not specified, or using in combination with another company’s reductions gears or Servomotor
may result in a reduction in the service life of the motor bearings.
• The dimensions of the Servomotor mounting flange on the reduction gears differ for each Servomo-
tor. Do not install reduction gears on a Servomotor other than the one specified.
• Use a Servomotor with a straight shaft and without a key when installing reduction gears.
• Install reduction gears on the Servomotor using the following procedure.
1. Remove the rubber cap and check that the set bolt is loose.
2. Insert the Servomotor shaft into the input shaft.
3. Tighten the Servomotor installation bolt according to the tightening torque specified in the follow-
ing table.
4. Tighten the set bolt according to the tightening torque specified in the following table.
5. After tightening the set bolt, replace the rubber cap.
Servomotor installation bolt Tightening torque (N·m)
M4 2.9
M5 5.8
M6 9.8
M8 19.6
M10 39.2
Set bolt Tightening torque (N·m)
M3 1.0 to 1.5
M4 2.9 to 3.5
Input shaft
Rubber cap
Set bolt
Servomotor installation bolt
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