Mitsubishi Electric MELSERVO-J3 Series Manual page 21

Part 1: Summary of MR-J3/MR-J3W Replacement
Changes Check items
Servo motor Mounting compatibility
Dimensions
Reducer
Moment of inertia
Load to motor inertia ratio
Connector
Torque characteristics
Rated speed/maximum speed
Thermal sensor (Note 1)
Encoder resolution
Controller
(SSCNET III
interface only)
Note 1. For HG-JR 1000 r/min series of 15 kW or more and HG-JR 1500 r/min series of 22 kW or more, the thermal sensor is
replaced with a thermistor. For HG-JR 1000 r/min series of 12 kW or less and HG-JR 1500 r/min series of 15 kW or less, the
thermal sensor is removed. A new encoder cable laying is required because the motor thermal wiring differs.
2. This may change the motor inertia, making it necessary to adjust the servo gain.
Impact
Some models have no mounting compatibility.
The total length may differ depending on models.
The actual reduction ratio of HF-KP and HF-MP series G1
types may differ from that of HG-KR series G1 types
depending on models.
The moment of inertia of the HF-_P/HC-_P/HA-_P motor
may differ from that of the HG motor depending on
models. (Note 2)
The range of the load to motor inertia ratio for the servo
motor may differ between the HF-_P/HC-_P/HA-_P motor
and the HG motor depending on models.
The power connector, encoder connector, and
electromagnetic brake connector may differ from one
another in shape.
The torque characteristics of the HF-_P/HC-_P/HA-_P
motor may differ from those of the HG motor.
The Rated speed/maximum speed of the HF-_P/HC-
_P/HA-_P motor may differ from those of the HG motor.
For HG-JR 1000 r/min series of 15 kW or more and HG-
JR 1500 r/min series of 22 kW or more, the thermal
sensor is replaced with a thermistor. For HG-JR 1000
r/min series of 12 kW or less and HG-JR 1500 r/min
series of 15 kW or less, the thermal sensor is removed.
The encoder resolution differs as follows.
HF-_P/HC-_P/HA-_P motor: 18bit ABS
HG motor: 22 bit ABS
MR-J4-_B_ servo amplifiers have two operation modes. "J4
mode" is for using all functions with full performance and "J3
compatibility mode" is compatible with MR-J3-_B_ series for
using the amplifiers as the conventional series.
When you connect an amplifier with SSCNET III/H
communication for the first controller communication with
the factory setting, the operation mode will be fixed to "J4
mode". For SSCNET III communication, the operation mode
will be fixed to "J3 compatibility mode".
1 - 6
Reference
document/items
Part 6, Section 1.1
Part 6, Section 2.1
Part 6, Section 2.2
Part 6, Section 2.3
Part 6, Section 2.3
Part 6, Section 2.4
Part 6, Section 2.5
Part 6, Section 2.5
Part 6, Section 2.6
Part 6, Section 2.7
Servo Motor
Instruction Manual
(Vol. 3)
Servo Motor Instruction
Manual (Vol. 3)
Servo Motor Instruction
Manual (Vol. 3)