In this article, we’re diving deeper into two types of stepper motors: high-resolution and encoder types. These motors can enhance precision in critical laboratory automation applications like autosamplers.
If you’re looking for ways to improve the positioning precision of stepper motors, there are two main approaches: increasing motor resolution or adding an encoder—or both. In this article, we’ll focus on two specific stepper motor types that can help achieve this goal.
First, consider using a high-resolution stepper motor to double the resolution. Standard 2-phase stepper motors typically step at 1.8°, but by switching to a high-resolution type, the resolution can be increased to 0.9° per step. This finer resolution leads to improved movement precision. High-resolution stepper motors have double the number of rotor teeth compared to standard types—100 teeth instead of 50—resulting in a smaller tooth pitch and a basic step angle of 0.9°. Additionally, these motors offer better angle-torque characteristics, which helps minimize errors caused by frictional loads, such as those found in ball screw applications.
Alternatively, you can opt for an encoder type stepper motor for added reliability. While standard hybrid stepper motors won’t miss steps when sized appropriately for the load and speed, modern designers of automated machines and robots increasingly demand more reliable solutions. Adding an encoder to a stepper motor’s rear shaft and closing the feedback loop to the controller allows the motor’s travel distance to be monitored and verified. By comparing the number of commanded steps with the encoder’s pulse count, missed steps can be detected and corrected automatically to prevent delays.
Oriental Motor offers various encoder options that can be preassembled for their PKP Series. Compact incremental encoders with different resolutions, channel numbers, output types, and electrical specifications are available, providing maximum flexibility with host controllers or PLCs. For enhanced noise immunity over longer distances, line driver output type encoders are recommended.
For instance, the PKP Series stepper motors come in both high-resolution and encoder types, ensuring quality and precision. The high-resolution type doubles the motor’s resolution from 200 steps/revolution to 400 steps/revolution, allowing for finer step angles through half-step or microstep driving. Encoder types add reliability by monitoring and correcting missed steps.
To give you a clearer idea, here are some key specs for the encoder types:
| Encoder Code | Type | Resolution | Output Channels | Voltage Input | Output Type |
|--------------|------------|------------|-----------------|---------------|----------------|
| R2E | Incremental| 200 P/R | 3ch | 5VDC ±10% | Voltage (TTL) |
| R2F | Incremental| 400 P/R | 3ch | 5VDC ±10% | Voltage (TTL) |
| R3J | Incremental| 1000 P/R | 3ch | 5VDC ±10% | Voltage (TTL) |
| R2EL | Incremental| 200 P/R | 3ch | 5VDC ±10% | Line Driver |
| R2FL | Incremental| 400 P/R | 3ch | 5VDC ±10% | Line Driver |
| R3JL | Incremental| 1000 P/R | 3ch | 5VDC ±10% | Line Driver |
These features make the PKP Series stepper motors versatile and suitable for a wide range of applications. Whether you need higher resolution or enhanced reliability, Oriental Motor has the right solution for your needs.
As always, don’t hesitate to reach out to our knowledgeable technical support team for assistance with our products. They’re here to help you find the best solution for your specific application.
Sisal Baler Press Machine,Sisal Baling Press Machine,Sisal Compress Machine,Sisal Press Machine
Nantong Sika Machinery Co., Ltd. , https://www.sikamachinery.com