How to resolve the issue of the worktable movement being obstructed in CNC tenon and groove machines?

If the worktable of the CNC tenon and groove machine is not moving smoothly, the following aspects can be addressed to resolve the issue:

Inspect lubrication conditions

Lubricant Volume Inspection

Firstly, inspect the lubricant quantity of the guideways and transmission mechanisms (such as ball screws). If the lubricant is insufficient, the friction between moving parts will increase, leading to不畅 movement of the worktable. Check the lubricant level using the oil level indicator on the equipment. If the level is too low, add the appropriate lubricant as per the equipment's manual. Generally, the commonly used lubricants for CNC tenon and groove machines include guideway oil and ball screw oil; ensure you select the right product.

Lubrication System Inspection

Inspect the lubrication system to ensure proper operation. This includes checking if the oil pump is pumping oil correctly, if the oil lines are clogged, and if the nozzles are spraying oil as intended. In case of a faulty oil pump, a replacement is necessary; for clogged oil lines, use a specialized oil line cleaning tool or replace the blocked section; if the nozzles are clogged, gently clean them with a fine needle or similar tool to ensure smooth oil spray onto moving parts.

Clean the guide rails and transmission components

Track Cleaning

The guide rail surface may become obstructed by chips, dust, and other foreign objects, affecting the movement of the worktable. After turning off the power to the equipment, clean the foreign objects from the guide rail surface using a clean brush or a compressed air gun. For stubborn stains, use an appropriate cleaning agent (such as a specialized machine tool cleaner) for cleaning, but be cautious to prevent the cleaner from entering the electrical system of the device. After cleaning, dry the guide rail surface with a clean cloth and reapply lubricant.

Transmission Parts Cleaning

For screw threads and other transmission components, cleaning is equally necessary. If there are shavings or other debris wrapped around the screw threads, it can hinder the movement of the worktable. You can use a brush to clean along the thread direction of the screw. Then, check if there's any foreign matter in the bearing areas at both ends of the screw. If issues are found with the bearing areas, it may be necessary to disassemble the bearings for further cleaning or replacement.

Inspect the transmission mechanism

Lead Screw Inspection

Inspect the screw for damage, such as worn or deformed threads. Severe wear on the screw can lead to reduced accuracy and smoothness in the worktable movement. The degree of wear can be determined by observing the wear marks on the screw surface. For slightly worn screws, adjusting the preload can improve the movement of the worktable; if the wear is severe, a new screw is required.

Coupling Inspection

Couplings are used to connect motors and lead screws, etc., for power transmission. If the coupling is loose or damaged, it can affect the power transmission, resulting in poor movement of the worktable. Check if the connection bolts of the coupling are loose, and tighten them if necessary. At the same time, observe if the elastic components of the coupling are damaged, such as if the rubber rings are aging or cracked. If the elastic components are damaged, replace the coupling.

Motor inspection

Motor malfunctions can also cause the workbench to move improperly. Check if the motor's output shaft rotates normally and if the motor's speed is correct. You can initially determine if the motor is stuck by manually rotating the motor's output shaft (while the power is off). If the motor does not rotate normally, it may be due to internal winding short circuits, open circuits, or damaged motor bearings, among other reasons. In such cases, professional maintenance personnel are required for motor repair or replacement.