The coupler is primarily a connecting component between the lead screw and the motor in a linear module, serving as one of the critical parts in linear modules. Its main purpose is to ensure the centerlines of the driving shaft and driven shaft are aligned in a straight line during motor operation. This alignment is essential for the normal functioning and precision of linear slides, making the coupler particularly important for high-speed linear modules.

When designing linear modules, a permissible deviation value is specified for the centerline alignment of the two shafts, which also serves as the requirement for coupler installation. From an assembly perspective, the larger the allowable deviation of the centerline, the easier it is to meet the installation requirements while ensuring the coupler can safely and reliably transmit torque. However, from the perspective of linear module quality, the smaller the centerline deviation, the more precise the alignment, leading to better operational performance and longer service life of the linear slide.

During coupler installation, one end (e.g., the host side) is fixed first, and the other half-coupler is adjusted relative to the fixed host-side half-coupler to achieve alignment. A dial indicator is mounted on the host-side half-coupler, with its contact point touching the other half-coupler. The coupler is then rotated to adjust and align. Alternatively, the dial indicator can be fixed on the non-host-side half-coupler, with its contact point touching the host-side half-coupler. The choice of mounting position depends on operational convenience. During alignment, the sum of the left-right adjustment values equals the sum of the up-down values. The final inspection standard for proper alignment is that the centers of the two couplers coincide—meaning their outer circles are aligned, and their mating surfaces (end faces) are parallel (with the centerlines of the two shafts parallel).

As an important precision machine component, linear modules require correct operation to prevent abnormal wear, ensuring their speed, precision, and service life. Routine maintenance helps maintain optimal performance over an extended period and enables timely detection and elimination of potential faults. This is especially crucial for long-idle linear modules, where improper maintenance can lead to corrosion, rust, and performance degradation.

Key routine maintenance practices for long-idle linear modules include:

1.DC Motor Brush Removal: For linear modules paired with DC motors, remove the brushes when the motor is not in use to prevent chemical corrosion of the commutator, which can damage motor function or render the entire module inoperable.

2.Regular Power Supply: Frequently power on the module, especially in humid environments (e.g., monsoon seasons) or high-moisture conditions. Operating the motor in a locked state (without movement) allows the electrical components to generate heat, expelling moisture from the module. This practice maintains functional stability and charges the backup battery. Regularly check the battery voltage; replace it immediately if it is too low to avoid data loss during power outages.

3.Anti-Rust and Lubrication: Apply anti-rust oil and lubricant to idle linear modules at regular intervals to prevent rust and corrosion, avoiding operational failures.