Product Information
Unboxing
Open the packaging box and remove the robot body, control box, power cable, accessories kit, and other products.
Product Composition
The LM3 series robot products mainly consist of the robot body and control box. The robot body has a total of 6 rotating joints, i.e., 6 degrees of freedom (DoF). As shown, the robot joints include the base (joint 1), shoulder (joint 2), elbow (joint 3), wrist 1 (joint 4), wrist 2 (joint 5), and wrist 3 (joint 6).
The robot body (hereinafter referred to as the robot) is the execution mechanism of the robot product, where the base is the robot installation point. The shoulder and elbow can execute larger movements, wrist 1 and wrist 2 can execute finer movements, and wrist 3 can connect end-effector tools.
The control box is the control part of the robot system, which can control the robot's position and attitude in the workspace, and connect the device's electrical input and output terminals. In practical applications, to ensure operational safety, it is usually necessary to connect an external emergency stop switch (optional) to the control box. For convenience, an external power button (optional) can also be connected.
As shown below, the control box connects to the robot through the robot cable. After connection and power-on (see Basic Operations), users can access the robot's L Master system through a computer, tablet, phone, or other graphical terminal device's browser[1] to control the robot and view various status information.
Basic Parameters
Robot Basic Parameters
| Degrees of Freedom | 6 | Working Radius | 638 mm |
| Effective Payload | ≤ 3 kg | Weight | 9.5 kg |
| Repeatability | ± 0.5 mm | End-effector Speed | ≤ 2 m/s |
| Ambient Humidity | 25~85% (non-condensing) | Ambient Temperature | 0~40°C |
| Protection Rating | IP54 | Power Supply | 48 V (DC) |
| Installation Method | Upright, inverted, side mounting | Installation Area | approximately 160 cm2 |
Control Box Basic Parameters
| Dimensions | 270×250×130(H) mm | Weight | 3.8 kg |
| Power Supply | 100~240 V (AC), 50~60 Hz | Cable Length | 2 m |
| Protection Rating | IP20 | Communication Protocol | Ethernet |
Control box and robot overall typical power consumption: 130 W.
Control Box Electrical Specifications
| Parameter | Minimum | Typical | Maximum | Unit |
|---|---|---|---|---|
| Input Voltage | 100 | 220 | 240 | V (AC) |
| External Mains Fuse (for 100~240 V) | 18 | 20 | 22 | A |
| Input Frequency | 47 | 50 | 63 | Hz |
| Rated Operating Power | 90 | 130 | 400 | W |
Motion Axes
The LM3 robot's joint motion range is unlimited, as shown in the table below.
| Joint | Motion Range | Maximum Speed |
|---|---|---|
| Joint 1 | Unlimited | 180 °/s |
| Joint 2 | Unlimited | 180 °/s |
| Joint 3 | Unlimited | 180 °/s |
| Joint 4 | Unlimited | 180 °/s |
| Joint 5 | Unlimited | 180 °/s |
| Joint 6 | Unlimited | 180 °/s |
The above-mentioned unlimited joint motion range excludes robot self-interference situations, which vary depending on the actual motion scenario.
Workspace
The LM3 robot's workspace refers to the area within 540 mm around the base joint.
As shown in the Lebai robot workspace diagram, the range indicated by the double-dotted line is the optimal operating area for point P.
I/O Interfaces
LM3 provides multiple I/O interfaces. Based on different application scenarios, you can choose I/O interfaces at different locations to implement the corresponding I/O operations.
Control Box I/O
As shown in the chart below, the robot control box provides physical I/O interfaces accessed through a DB15 male connector:
- 4 digital inputs, 4 digital outputs.
- 2 analog inputs, 2 analog outputs.
| No. | Interface | Port Properties | Programming Example |
|---|---|---|---|
| 1 | Power Positive | 24 V | |
| 2 | Analog Output 1 | AO 0 | set_ao(0, val) |
| 3 | Analog Output 2 | AO 1 | set_ao(1, val) |
| 4 | Digital Output 1 | DO 0 | set_do(0, val) |
| 5 | Digital Output 2 | DO 1 | set_do(1, val) |
| 6 | Digital Output 3 | DO 2 | set_do(2, val) |
| 7 | Digital Output 4 | DO 3 | set_do(3, val) |
| 8 | Power Negative | - | |
| 9 | Analog Input 1 | AI 0 | get_ai(0) |
| 10 | Analog Input 2 | AI 1 | get_ai(1) |
| 11 | Digital Input 1 | DI 0 | get_di(0) |
| 12 | Digital Input 2 | DI 1 | get_di(1) |
| 13 | Digital Input 3 | DI 2 | get_di(2) |
| 14 | Digital Input 4 | DI 3 | get_di(3) |
| 15 | Power Negative | - |
- Digital inputs are PNP type, input voltage 3~30 V.
- Digital outputs are PNP type, output voltage 24 V, total output current for 4 ports maximum 2 A.
- Analog inputs/outputs support the following two types:
- Voltage type: input/output voltage 0~10 V.
- Current type: input/output current 4~20 mA.
Flange I/O
As shown in the chart below, the end flange provides I/O interfaces accessed through SA810:
- 2 digital input interfaces.
- 2 digital output interfaces.
| No. | Interface | Port Properties | Programming Example |
|---|---|---|---|
| 1 | Power Positive | 24 V | Maximum supply current 2 A |
| 2 | Power Negative | ||
| 3 | Digital Output 1 | FDO 0 | set_flange_do(0, val) |
| 4 | Digital Output 2 | FDO 1 | set_flange_do(1, val) |
| 5 | EIA-485 A | RS485 D- | modbus.new_flange() |
| 6 | EIA-485 B | RS485 D+ | modbus.new_flange() |
| 7 | Digital Input 1 | FDI 0 | get_flange_di(0) |
| 8 | Digital Input 2 | FDI 1 | get_flange_di(1) |
- Digital inputs are PNP type, input voltage 3~30 V.
- Digital outputs are PNP type, output voltage 24 V, total output current for 2 ports maximum 1.5 A.
Voltage or current type analog inputs/outputs are not supported. Modbus/RTU protocol is supported on the RS485 interface.
TIP
In the LM6J trial production model, the interfaces corresponding to numbers 5 and 6 are CANH and CANL respectively.
The new LMG-90 gripper only supports communication via RS485 serial protocol on the LM3 model, and is not compatible with CAN protocol.
Expansion I/O
If the above-provided input/output interfaces are insufficient, you can contact us before purchasing equipment for I/O expansion modifications.
Communication Interfaces
The control box also provides communication interfaces with different protocols:
| No. | Function | Performance Parameters | Programming Example |
|---|---|---|---|
| 1 | RS485A | 485 Interface A | serial.open("/dev/ttyS1") |
| 2 | RS485B | 485 Interface B | serial.open("/dev/ttyS1") |
| 3 | TX-232 | 232 Interface Transmit | serial.open("/dev/ttyS3") |
| 4 | RX-232 | 232 Interface Receive | serial.open("/dev/ttyS3") |
| 5 | TX-TTL | TTL Signal Transmit | serial.open("/dev/ttyS2") |
| 6 | RX-TTL | TTL Signal Receive | serial.open("/dev/ttyS2") |
| 7 | Signal Ground |
Network Connection
LM3 provides three network connection methods: Ethernet, Wi-Fi (2.4 GHz) hotspot network, and 4G cellular network. The control box is equipped with an RJ45 Ethernet port (8P8C), a pair of Wi-Fi antennas, and a 4G antenna.
The device connects to the cloud through IoT, with only the device online status registered by default. When device debugging encounters difficulties and requires our remote assistance, we will obtain your consent to connect to your device through the IoT platform, view device information, and may modify your device configuration.
TIP
Batches produced before 2020 do not have a built-in 4G IoT module and cannot help you solve problems through remote connection. If you need further support, you can contact our after-sales service for a discounted replacement.
Robot Installation
LM3 robot supports three installation methods: upright, inverted, and side mounting (when side mounting, ensure the robot cable exit faces downward).
Use the 4 M6 screws from the robot accessories kit to install against the 4 mounting holes on the robot base as shown below. It is recommended to tighten these screws at 9 N·m torque.
If more precise robot positioning is needed, you can drill 2 holes with 5 mm diameter and use pins for additional fixation.
WARNING
- Every mounting hole of the robot should be secured with a screw.
- When installing the robot, support the robot until all base screws are fully tightened.
Warning
Do not fix the robot (including control box) in an unstable position, otherwise it may fall and be damaged.
End-Effector Tool Installation
As shown below, the front face of the robot end flange has 4 M6 threaded holes for connecting end-effector tools to the robot. The side of the flange has 4 M3 threaded holes for installing Lebai lightweight end-effector tools. Under normal use and excluding external collisions, the robot end-effector (including tools) can withstand a maximum load of 3 kg.
Effective Payload
The robot's maximum allowable effective payload depends on the center of gravity offset, as shown above. The center of gravity offset is defined as the distance along the normal direction of the flange face between the center of the tool output flange face and the center of gravity.
Warning
- Load conditions should be within the range shown in the chart.
- The effective payload shown in the chart represents the maximum load capacity. Under no circumstances should the maximum weight shown be exceeded.
- Exceeding the allowable value will cause premature damage to internal robot components.
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