is a 750-watt, high-inertia AC servo motor from the Panasonic MINAS A5 family. Its primary function is to provide high-precision motion control for automated industrial machinery, specifically those handling high mechanical loads that require exceptional stability.
Core Function
Precision Positioning: Equipped with a 20-bit incremental encoder, it provides over 1 million pulses per revolution, allowing for microscopic movement and absolute accuracy in CNC and robotic tasks.
Load Stability (High Inertia): This "High Inertia" version is specifically designed to manage heavy or unbalanced loads. It functions by preventing resonance (vibration) and overshooting when the machine rapidly accelerates or stops.
High-Speed Processing: It features a 2.3 kHz velocity response frequency, which means it can process commands and adjust its shaft position nearly 2.5 times faster than standard entry-level servos.
Weight & Dimensions in Inches
As part of the 750W "C-Frame" series, it is larger and heavier than the 400W models.
Metric
Inches (approx.)
Millimeters
Height (Frame)
3.15"
80 mm
Width (Frame)
3.15"
80 mm
Length (Body only)
~4.53"
115 mm
Shaft Diameter
0.748"
19 mm
Shaft Length
1.378"
35 mm
Net Weight
5.51 lbs
2.5 kg
Key Specifications
Power Output: 750 Watts (0.75 kW).
Rated Torque: 2.4 Nm (Peak 7.1 Nm).
Rated Speed: 3000 RPM (Max 4500 RPM).
Protection:IP65 (dust and water-jet resistant).
Brake:Without electromagnetic holding brake.
The primary function of the MHMJ082G1U is to provide precise, high-torque motion control for heavy industrial loads. It serves as the "muscle" in an automated system, capable of moving heavy mechanical parts with microscopic accuracy while maintaining perfect stability.
Key Functional Roles
Handling High-Inertia Loads: Its "High Inertia" design is its most important function. It is specifically engineered to drive large or heavy mechanical systems (like long lead screws, heavy belts, or large rotating tables). It prevents the system from vibrating, shaking, or overshooting its target when stopping a heavy load.
Microscopic Positioning: With its 20-bit encoder, it breaks down every single rotation into 1,048,576 distinct positions. This functions to give the motor extreme resolution, allowing it to move to an exact point within microns.
High-Speed Dynamic Response: It has a 2.3 kHz velocity response frequency, which is more than double the speed of standard entry-level servos. This functions to make the motor "feel" more responsive, adjusting its power instantly if it encounters resistance or changes in speed.
Torque Consistency: It functions to deliver a steady 2.4 Nm of torque, but it can "boost" up to 7.1 Nm (peak torque) for short bursts. This is critical for starting a heavy machine from a dead stop or performing rapid emergency stops.
Common Use Cases
CNC Milling & Routing: Moving heavy machine beds or spindles with high precision.
Industrial Pick-and-Place: Handling larger payloads in packaging lines.
Automated Material Handling: Powering conveyors or lift systems that carry heavy crates or metal parts.
Technical Limitation
No Holding Power: Because this model does not have a built-in brake, its function is strictly for horizontal movement or systems where the load won't drop if power is cut. For vertical applications, the G1V model (with brake) is required instead.
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