MELSERVO-J4

Cautions

When the rotary servo motor is mounted with the shaft vertical (shaft ●● up), take measures on the machine side so that oil from the gear box does not get into the servo motor. Mount the geared servo motor in a direction described in "Servo Motor ●● Instruction Manual (Vol. 3)." When the direct drive motor is used in a machine such as vertical axis ●● which generates unbalanced torque, be sure to use it in absolute position detection system. Do not use the 24 V DC interface power supply for the electromagnetic ●● brake. Provide a dedicated power supply to the electromagnetic brake. Do not apply the electromagnetic brake when the servo is on. Doing so ●● may cause the servo amplifier overload or shorten the brake life. Apply the electromagnetic brake when the servo is off. Torque may drop due to temperature increase of the rotary servo motor ●● or the direct drive motor. Be sure to use the motor within the specified ambient temperature. Cautions for linear encoders If the linear encoder is improperly mounted, an alarm or a positioning ●● deviation may occur. Refer to the following general inspections of linear encoder to verify the mounting state. Contact the relevant linear encoder manufacturers for more details. General inspections of linear encoder ●● (a) Verify that the gap between the linear encoder head and the linear encoder is appropriate. (b) Check for any rolling or yawing (looseness) on the linear encoder head. (c) Check for contaminations and scratches on the linear encoder head and scale surface. (d) Verify that vibration and temperature are within the specified range. (e) Verify that the speed is within the tolerable range even when overshooting.

When an error occurs, the servo amplifier stops outputting the power ●● with activation of the protective function, and the servo motor stops immediately with the dynamic brake. Servo amplifiers without dynamic brake are also available for free-running the servo motor. Contact your local sales office for more details. The dynamic brake is a function for emergency stop. Do not use it to ●● stop the servo motor in normal operations. As a rough guide, the dynamic brake withstands 1000 times of use ●● when a machine which has load to motor inertia ratio equals to or lower than the recommended ratio stops from the rated speed every 10 minutes. When an error occurs, ensure safety by turning the power off, etc., ●● before dealing with the error. Otherwise, it may cause an accident. If the protective functions of the servo amplifier activate, turn the power ●● off immediately. Remove the cause before turning the power on again. If operation is continued without removing the cause of the error, the servo motor may malfunction, resulting in injury or damage. The servo amplifier, the regenerative resistor, and the servo motor can ●● be very hot during or after operation. Take safety measures such as covering them to prevent your hand and/or parts including cables from coming in contact with them. Do not touch the servo amplifier, the regenerative resistor, or the servo ●● motor while the power is on or for a while after the power is turned off. Otherwise, an electric shock may occur. Be sure that the charge lamp is off, and check the voltage between P+ and N- (L+ and L- for the drive unit) with a voltage tester before wiring or inspection. In a maintenance inspection, make sure that the emergency stop circuit ●● operates properly such that an operation can be stopped immediately and a power can be shut off by the emergency stop switch. 7. Others Do not touch the servo amplifier or the servo motor with wet hands. ●● Do not modify the servo amplifier or the servo motor. ●● Cautions for Ethernet cables Do not apply excessive tension on the Ethernet cable when cabling. ●● Refer to relevant Ethernet cable manual to keep the bending radius ●● within the range of specifications. Avoid laying the Ethernet cables and the power cables side by side or ●● do not bundle them together. Separate the Ethernet cables from the power cables. Cautions for SSCNET III cables Do not apply excessive tension on the SSCNET III cable when cabling. ●● The minimum bending radius of the SSCNET III cable is 25 mm for ●● MR-J3BUS_M and 50 mm for MR-J3BUS_M-A/-B. If using these cables under the minimum bending radius, performance cannot be guaranteed. If the ends of the SSCNET III cable are dirty, the light will be obstructed, ●● causing malfunctions. Keep the ends clean. Do not tighten the SSCNET III cable with cable ties, etc. ●● Do not look at the light directly when the SSCNET III cable is not ●● connected. Cautions for rotary servo motors and direct drive motors Do not hammer the shaft of the rotary servo motor and the rotor of the ●● direct drive motor when installing a pulley or a coupling. Doing so may damage the encoder. When installing the pulley or the coupling to the key shaft servo motor, use the screw hole on the shaft end. Use a pulley extractor when removing the pulley. Do not apply a load exceeding the tolerable load onto the rotary servo ●● motor shaft or the direct drive motor rotor. The shaft or the rotor may break.

Servo Amplifiers Rotary Servo Motors Linear Servo Motors Direct Drive Motors Options/Peripheral Equipment Product List LVS/Wires Cautions

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