AC High Voltage Joint Module
Building robot joints from scratch means dealing with complicated motor alignment, separate encoders, and messy cable routing. The AC High Voltage Joint Module solves this by packaging a strain wave gear, servo motor, absolute encoder, and brake (option) into one ready to mount actuator.
Available across five sizes (M80, M90, M110, M142, M170), this integrated approach completely eliminates the need to source and align multiple discrete components. To accommodate different engineering requirements, Laifual modules are available with a standard hollow shaft design and single encoder configuration (dual encoder available as an option).
The modules are suitable for applications where braking is managed externally by the host controller. A large through-bore option is available to accommodate thick cable bundles. The modules support BiSS-C and TAMAGAWA encoder interfaces, achieving positioning accuracy of 20 arc seconds. With an IP66-rated housing and pre-filled long-life grease, the modules provide up to 15,000 hours of maintenance-free operation.
Joint Module vs Standalone Reducer
A standalone strain wave gear is a purely mechanical component. Integrating it requires your team to source a matching servo motor, select encoders, wire feedback loops, and align all shafts to strict micron-level tolerances.
Conversely, the AC High Voltage Joint Module arrives as a completely finished actuator. We factory assemble and precisely align the gear, motor, encoders, and brake on the exact same Zeiss CMM inspection lines that verify our raw gear components. You simply bolt the module into your robot frame and plug in the cables.
When the trade-off makes sense:
- Choose a joint module when development speed matters; the module arrives ready to run on day one
- Choose a standalone reducer when you need to specify a specific motor brand, custom windings, or non-standard encoder format
- Choose a joint module when you lack the in-house capability to align motor and reducer shafts to the required tolerance (typically under 5 microns runout)
- Choose a standalone reducer when your production volume justifies the tooling cost of building your own integrated joint solution
High Voltage M80D
- Absolute encoder, 17-bit single-turn + 16-bit multi-turn
- Permanent magnet brake
- Hollow Shaft Standard: standard
- Smallest frame
- 20 arc sec accuracy
- IP66 rated
High Voltage M90D
- Absolute encoder, 17-bit single-turn + 16-bit multi-turn
- Permanent magnet brake
- Hollow Shaft Standard: standard
- Low vibration operation
- 15,000h design life
- IP66 rated
High Voltage M110D
- Absolute encoder, 17-bit single-turn + 16-bit multi-turn
- Permanent magnet brake
- Hollow Shaft Standard: extra-large
- Higher torque class
- 20 arc sec accuracy
- IP66 rated
High Voltage M142D
- Absolute encoder, 17-bit single-turn + 16-bit multi-turn
- Permanent magnet brake
- Hollow Shaft Standard: extra-large
- Heavy payload class
- 20 arc sec accuracy
- IP66 rated
High Voltage M170D
- Absolute encoder, 17-bit single-turn + 16-bit multi-turn
- Permanent magnet brake
- Hollow Shaft Standard: extra-large
- Largest frame
Sing Encoder and Brake System
The Standard configuration includes one absolute encoder:
Encoder: One absolute encoder with 17-bit single-turn and 16-bit multi-turn functions for motor position feedback. A dual-encoder configuration is also available upon customer request.
The permanent magnet brake is more compact and lightweight, reducing overall joint size and weight for space-constrained robotic applications. It requires zero power consumption during holding and generates minimal heat, improving energy efficiency and system reliability.
Spec Overview Table
| Module order number | Module order number | Brake order number | Motor order number | Encoder Interface |
| BISS‑C / TAMAGAWA | EM‑80D‑A | BM‑80‑A | MM‑80‑A | BISS‑C / TAMAGAWA |
| M90 | EM‑90D‑A | BM‑90‑A | MM‑90‑A | M90 |
| M110 | EM‑110D‑A | BM‑110‑A | MM‑110‑A | M110 |
| M142 | EM‑142D‑A | BM‑142‑A | MM‑142‑A | M142 |
| M170 | EM‑170D‑A | BM‑170‑A | MM‑170‑A | M170 |
Please verify the following data (sourced from sub-model Technical Specifications pages)
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Applications
Rotary Indexing Tables
The actuator drives indexing tables in automated assembly lines, enabling precise step-by-step positioning of workpieces between different processing stations.
Packaging and Pick-and-Place
M80D and M90D modules in delta robot arms and high-speed picker wrists, where the factory-integrated module reduces commissioning time from days to hours.
Machine Tool Automation
M110D to M170D modules in automatic tool changers and rotary pallet systems where IP65 rating handles coolant spray and metal chip exposure.
Frequently Asked Questions
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