3 Things to Know About the BLV Series Update
The BLV Series is one of our two offerings in DC-input brushless motor speed control systems. Known for its constant torque, wide speed range, and precise speed regulation, the BLV driver stands out with unique features tailored specifically for mobile robots, such as low-voltage operation and ramp functionality.
An illustration of the BLV Series brushless gear motor paired with its driver is provided below. On the right, you’ll notice a BLV gear motor with a pre-assembled FR gearhead, which is a compact, flat hollow shaft gearhead designed for high-torque applications. The dedicated motor driver on the left controls the motor’s speed and operation. The terminal side is visible, showing where all the wires connect. Optional parallel shaft gearheads or electromagnetic brakes can be installed as well.
Here’s an overview of the original BLV Series lineup with 200W and 400W options, along with some key specs.
While listening to feedback from our customers, we recognized the strong demand for compact 100W gear motors within the AGV/AMR/mobile robotics and material handling industries. Consequently, we extended the BLV Series and its AGV-specific functionalities into the 100W range, introducing a new 100W model. Although the appearance remains consistent, the specifications have undergone slight modifications.
**Differences:**
- The 100W models only accept 24VDC; 48VDC is not supported.
- The speed range is narrower, ranging from 10~3000 rpm (analog) or 80~3000 rpm (digital).
- The maximum extension distance between the motor and driver has reduced to 1.5 meters.
- The IP rating for the motor has increased from IP40 to IP65.
**Similarities:**
- The speed regulation remains unchanged at ±0.5% (analog) or ±0.2% (digital).
- The driver's IP rating stays at IP20.
- The safety standards remain the same.
Below is a comparison chart for the 100W, 200W, and 400W BLV Series models.
Two cable lengths are available: 0.2m (0.7ft) or 1.0m (3.3ft). However, a round-shaft, ungeared version is not available for the 100W type.
Here’s a visual representation of the overall system configuration. Accessories like mounting brackets, couplings, and external speed potentiometers are also available.
In addition to the OPX-2A "Control Module," MEXE02 support software now serves as a new method to program the stored data on the driver. Next, let’s explore the second significant design change introduced in the BLV Series.
The MEXE02 software offers both an intuitive interface and straightforward point-to-point motion profile programming, along with monitoring capabilities. Originally, the stored data on the BLV driver could be programmed using either the OPX-2A handheld teaching pendant or via Modbus RTU through RS-485. Now, all drivers across wattages can utilize the universal MEXE02 support software for even simpler data setup.
The screenshot below demonstrates the MEXE02 software when an updated BLV driver is connected to a PC. Fields such as rotation speed [rpm], torque limiting value [%], acceleration time [s], and deceleration time [s] are required. You simply input the desired values or opt for default settings. Eight speed profiles are available, corresponding to the product. For instance, 256 motion profiles are accessible with the AZ Series stepper motor drivers.
Don’t forget to save your data by performing a data write operation.
Besides the easy and intuitive programming, the MEXE02 software’s operational teaching, monitoring, and testing functions prove invaluable during setup or troubleshooting. Let’s delve into these functions.
**Teaching and Remote Operation:**
The teaching operation window enables the operator to manually move the motor to a specific position, allowing the position to be taught and stored in the driver. Arrow keys can be used to move the motor, and data numbers can be selected to save the data. Remote operation permits testing of the motion profiles stored in the driver without needing to wire the I/O.
The two screenshots below display no product connected, hence the monitored values showing 0. During system operation, real-time values will appear. Under OUTPUT, green signifies the output is ON, while white indicates OFF.
Real-time information, such as feedback speed (at the motor and gearhead output shaft), command speed, load factor, inverter voltage, and alarm code, appears on the top right corner. Only certain output statues are displayed here. For advanced I/O status checks, refer to I/O test operation. Remember to check the checkbox to initiate any teaching, remote, or monitor operation.
**Monitoring Operations – Multiple Options:**
Numerous monitoring operations are available to assist with troubleshooting and understanding the system’s functioning. Let’s explore a few monitoring operations.
**Alarm Monitor:**
The alarm monitor is beneficial during troubleshooting as it displays the exact alarm code causing the issue. It also stores up to 10 alarm records. Refer to the “Cause†and “Measure†sections to determine the appropriate action.
The following screenshot shows an "RS-485 communication timeout." The cause is that the time set in the "communication timeout" parameter has elapsed without establishing communication. The solution is to check the connection between the master controller and driver. For further information, consult the manuals.
**Waveform Monitor:**
The waveform monitor records the timing of I/O as the system operates. This is especially useful during troubleshooting as it helps identify what the system is actually doing versus what it should be doing.
**RS-485 Status Monitor:**
This checks the status of communication, particularly useful when setting up an RS-485 industrial network.
**I/O Test:**
The I/O test verifies the real-time statuses of driver I/O, including direct I/O and remote I/O via RS-485. It’s valuable during troubleshooting to determine why something isn’t functioning correctly.
Alongside the major design changes mentioned earlier, several new functions have been introduced to enhance the usability of the BLV Series, improving machine operation.
**DIR Output:**
A rotation direction output has been added to the BLV Series drivers, enabling users to monitor the motor direction remotely. ON indicates forward, and OFF indicates reverse. Previously, the speed could be calculated by monitoring the pulses from the SPEED-OUTPUT, but the rotation direction couldn’t be confirmed. We incorporated this feature based on market feedback.
**Load Factor Monitor Commands:**
New monitor commands have been added for master-slave operations with upper-level PLCs or HMIs. The original BLV Series drivers couldn’t monitor load fluctuations when operated via network communication, so we’ve enhanced the product by adding more monitor commands. These include speed (gear shaft), speed decimal point position, conveyor traveling speed, conveyor traveling speed decimal point position, external analog speed setting, external analog torque limiting, and external analog voltage setting.
**Flange Drive Adapter:**
Simplifies setup and increases both radial and axial load capacity.
In conclusion:
- BLV 100W parallel shaft gear motors and FR flat hollow shaft gear motors have been added to the BLV Series in response to AGV and material handling feedback.
- The easy-to-use MEXE02 support software is now compatible with all BLV Series drivers.
- New DIR output and network monitor commands enhance the usability of the BLV Series.
The BLV Series is perfect for customers requiring DC or battery-powered brushless motors, conveyor manufacturers, and those needing industrial network communication. The FR gearhead is recommended for high-torque applications where motor length is also a concern. The addition of MEXE02 software support for the BLV Series brings numerous advantages, including easy data programming and status monitoring.
To learn more about the AGV-specific functions of the BLV Series, please subscribe!
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