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In this blog post, I’ll walk you through how to easily program a timed pressing operation using our MEXE02 universal product support software. This example works for all products within the AlphaStep AZ Series family, which also includes other series that utilize the same technology and software.
The MEXE02 software doesn’t follow a chronological programming method like traditional line-by-line programming. Instead, it allows users to create point-to-point motion profiles that can be linked in various ways. Let’s break down the tasks required for a typical timed pressing operation using a DRS2 Series compact electric cylinder, which employs AlphaStep AZ Series technology. Some of the great features of the AlphaStep AZ Series can only be unlocked with the MEXE02 software.
Firstly, the motor should approach the load at a high speed, say 50 mm/s, then slow down as it gets closer to avoid causing damage. This can be achieved with a basic positioning operation. Once the actuator crosses a certain point (indicated by a dotted line), a sensor will trigger the system to switch to a slower push motion operation, providing continuous push force against the load. During this push motion, the actuator should push the load for five seconds at a lower torque setting, then retract by -0.1 mm before returning to its original home position at 50 mm/s to prepare for the next load cycle.
To translate these actions into programming terms, we need to define the necessary functions and parameters. The MEXE02 software simplifies this process significantly compared to traditional PLC-based systems. Visualizing the setup can also help programmers. In this example, a switch starts the motion sequence, with the sensor's output connected to the driver's R0 input.
A flowchart illustrates the process, detailing the functions required, such as “positioning operation†and “push motion operation.†One of the key advantages of the DRS2 Series actuator is its use of AlphaStep hybrid control and absolute positioning capabilities, eliminating the need for external home sensors, limit switches, and encoders, reducing wiring and increasing reliability.
The Event Jump function is particularly useful for detecting an external input signal and switching between motion profiles. To implement this, you’ll need to configure the Operation I/O Event, Direct-IN, and Operation Type settings in the MEXE02 software. The Operation I/O Event acts as an IF/THEN statement, enabling the motor to exit repetitive motion sequences to perform other tasks based on external or internal signals.
Looking at the MEXE02 interface, selecting a product series displays various parameters on the right. The three highlighted areas represent the essential functions we need to set: Operation I/O Event, Direct-IN, and Operation Type (where you choose push motion operation).
For the Event Jump function, parameters include Name, Link, Next data number, Dwell time, Event trigger I/O, Event trigger type, and Event trigger count. The Push Motion function is standard in most closed-loop stepper and servo motor systems, allowing the motor to stall against a load to apply continuous torque or push force, useful in pressing and stamping operations.
Using push motion requires selecting one of the Operation Types: Continuous (push motion), Absolute push motion, or Incremental push motion (command or feedback position-based). Remember to adjust the Operating current [%], as push motion won’t work if the current is set to 100%.
The Direct-IN function assigns specific I/O signals to trigger operations. It’s crucial to specify which inputs the driver should monitor.
Finally, within the MEXE02 software, you’ll need four motion profiles starting from #0: two absolute positioning profiles, one incremental push-motion profile, and one incremental positioning profile. Set the operating current to 20.0% (torque is proportional to current). Up to 256 motion profiles are available, but for more complex applications, contact our tech support team for guidance.
In the Operation I/O Event window, configure two profiles: one continuous sequential operation and one automatic sequential operation. Ensure you select the appropriate event trigger I/O, type, and count. For #0, choose the ON edge trigger, and for #1, ON (msec), setting the event trigger count to 5000 msec (five seconds).
In the Direct-IN Function window, set up two inputs—R0_R and TLC—to assign them to DIN0 and DIN1.
And there you have it. While mastering the MEXE02 software and motion profile linking takes time, this programming example works universally across the AlphaStep AZ series and MEXE02 software, applicable to DRS2 Series compact electric cylinders, EZS Series linear slides, EAC Series linear cylinders, L Series rack and pinion, EH Series grippers, and DG2 Series rotary actuators.
If you’re new to the MEXE02 software, check out this blog post and video introducing its features. Don’t forget to subscribe for more programming examples!
Although we don’t have a dedicated video for timed pressing or event jump operations, here’s a video demonstrating a round-trip operation with push motion.
Feel free to dive straight into programming with these instructional videos for AZ Series, AR Series, and RKII Series.
Let me know if you have any questions or need further assistance!