1. Introduction
— 1-4 —
• Excessive load to the Motor may damage the bearing of Motor and may
mechanically lock the Motor.
• The flatness of the Motor mounting surface shall be 0.02 mm or less.
Caution : For an oscillating operation less than 45 [°], turn the Motor 90 [°] or more
at least once a day.
Caution : Do not give a direct impact to the Motor with a hammer or the like. A
direct impact to the outside of the Motor or the load fixed to the Motor
may deteriorate accuracy of the built-in position sensor.
Caution : When attaching a rotary machine component to the Motor such as a
bearing or a ball screw, be sure to align both centers within 0.01 mm.
Excessive eccentric load or excessive load to the Motor may cause the
premature failure of Motor’s bearing.
Danger : As the Motor may become hot depending on your use conditions, handle
it in a sufficiantly cold state, and be careful of burns, etc.
Danger : The Motor has a rotational part and a stationary part. Be careful not to be
caught in the rotational part, including the parts that you install.
Warning : Be sure not to activate the dynamic brake in the following conditions.
Otherwise the dynamic brake circuit may break and the Motor will enter in
a “free run” state, leading to possible injuries.
• Do not activate the dynamic brake in normal operations. Stop the Motor by a control
command, not by the dynamic brake. The dynamic brake is an auxiliary function to
stop the Motor immediately in an emergency. In the middle of operation, an alarm, a
warning or the “Emergency stop” input activates the dynamic brake.
Warnings that initiate “Servo-off” state are “A3” (Software thermal), “C0” (Position
command/Feedback error), “F5” (Program error), and “F8” (Automatic tuning
error).
• The load moment of inertia to a Motor must be within the range of the
recommended load moment of inertia described in "2.5 Motor Specifications." In
case of an indexing operation, a position command shall be 360 degrees or less,
while the maximum speed for continual rotation must be 0.5 [s
-1
] or less.
(However, there may be a possibility to exceed the above limits in some cases.
Please consult NSK when you require a close investigation on the limits.)
• For the PN4180 Motor, be sure to stop the Motor for 20 minutes or longer when you
stop it by the dynamic brake.
Caution : When the Motor is continually accelerating a high inertial load with high
acceleration, the system constantly outputs a high torque exceeding the
rated torque, and thus likely to activate the warning “A3” (Software
thermal). In such a case take a remedy to decrease the load moment of
inertia or to lower the speed.
To Next Page
Loading...
