Lead screw modules are core components of automated equipment, widely used in semiconductors, 3C electronics, new energy, medical equipment, precision measuring equipment, and many other industrial fields. Their accuracy level determines the stability of equipment operation. Accurate evaluation of module performance requires the comprehensive use of precision instruments such as laser interferometers and coordinate measuring machines, combined with international standards and customized solutions.
Positioning Accuracy Testing: Using a laser interferometer, the module is instructed to move to a series of target positions. The deviation between the actual reached position and the instructed position is measured; the maximum deviation over the entire stroke is the positioning accuracy.
Repeatability Accuracy Testing: The module is instructed to repeatedly move back and forth to the same target position. The actual stopping position is recorded each time using a measuring instrument; the maximum dispersion range is the repeatability accuracy.
Backlash Testing: Also known as reverse clearance, a dial indicator or micrometer is fixed with its probe in perpendicular contact with the side of the module's slider. Torque is then applied to the lead screw in both positive and negative directions. The maximum difference in the dial indicator readings in the two directions is the backlash value.
Parallelism Testing: Place a ruler or precision straightedge firmly against the module mounting reference surface. Use a dial indicator to move along the stroke direction on the top or side of the slider. The maximum change in the dial indicator reading throughout the entire stroke is the parallelism error.
Positioning Retention Testing: After the module is subjected to rated load and reaches a certain position, lock the motor or brake. Use a displacement sensor to monitor the slider position change over a long period to assess its ability to maintain its position under load.
Vibration and Noise Analysis: During the module's no-load and loaded operation, use a sound level meter and vibration sensor to monitor its operating status. Abnormal vibration and noise are often precursors to decreased accuracy or assembly problems and can be used as comprehensive evaluation indicators.
The accuracy testing of lead screw modules must balance standard compliance with actual working conditions. By scientifically selecting testing equipment, controlling environmental interference, and cross-validating data, the reliability of testing can be effectively improved, providing a key basis for equipment selection and fault diagnosis. For other questions or purchasing needs, please contact Taiwan High-Tech Transmission Consulting!
