YASKAWA SGM7D Product Manual page 17

 Operation Precautions
 Before starting operation with a machine connected, change the settings of the switches and
parameters to match the machine.
Unexpected machine operation, failure, or personal injury may occur if operation is started before
appropriate settings are made.
 Do not radically change the settings of the parameters.
There is a risk of unstable operation, machine damage, or injury.
 Install limit switches or stoppers at the ends of the moving parts of the machine to prevent
unexpected accidents.
There is a risk of machine damage or injury.
 For trial operation, securely mount the Servomotor and disconnect it from the machine.
There is a risk of injury.
 Forcing the motor to stop for overtravel is disabled when the Jog (Fn002), Origin Search
(Fn003), or Easy FFT (Fn206) utility function is executed. Take necessary precautions.
There is a risk of machine damage or injury.
 When an alarm occurs, the Servomotor will coast to a stop or stop with the dynamic brake
according to the SERVOPACK Option and settings. The coasting distance will change with the
moment of inertia of the load and the resistance of the External Dynamic Brake Resistor. Check
the coasting distance during trial operation and implement suitable safety measures on the
machine.
 Do not enter the machine's range of motion during operation.
There is a risk of injury.
 Do not touch the moving parts of the Servomotor or machine during operation.
There is a risk of injury.
 Always turn OFF the servo before you turn OFF the power supply. If you turn OFF the main cir-
cuit power supply or control power supply during operation before you turn OFF the servo, the
Servomotor will stop as follows:
• If you turn OFF the main circuit power supply during operation without turning OFF the servo, the
Servomotor will stop abruptly with the dynamic brake.
• If you turn OFF the control power supply without turning OFF the servo, the stopping method that is
used by the Servomotor depends on the model of the SERVOPACK. For details, refer to the manual
for the SERVOPACK.
 Always measure the vibration of the Servomotor with the Servomotor mounted to the machine
and confirm that the vibration is within the allowable value.
If the vibration is too large, the Servomotor will be damage quickly and bolts may become loose.
 When you adjust the gain during system commissioning, use a measuring instrument to monitor
the torque waveform and speed waveform and confirm that there is no vibration.
If a high gain causes vibration, the Servomotor will be damaged quickly.
 An alarm or warning may occur if communications are performed with the host controller while
the SigmaWin+ or Digital Operator is operating.
If an alarm or warning occurs, it may interrupt the current process and stop the system.
 Maintenance and Inspection Precautions
 Do not change any wiring while power is being supplied.
There is a risk of electric shock or injury.
WARNING
CAUTION
NOTICE
DANGER
xvii