1. Stop the machine and clean the guide rail.
Switch off the power and ensure safe operation.
Use a lint-free cloth dampened with alcohol to thoroughly wipe the guide rail raceway, removing oil, ink stains, and metal shavings to prevent impurities from affecting adjustment accuracy.
2. Check the current gap value.
Feeler gauge measurement: Insert a feeler gauge between the slider and the guide rail, feel the resistance, and record the value. A normal gap should be ≤ 0.04mm.
Dial indicator verification: Monitor the lateral runout while the slider is running. If the offset exceeds 0.03mm, it indicates significant looseness or wear.
✅ If the measured value exceeds the standard, proceed to the next adjustment step; if there is severe wear (such as scratches or pitting on the guide rail surface), it is recommended to replace the component.
3. Loosen the fixing bolts and prepare for adjustment.
Use a torque wrench to slowly loosen the slider fixing bolts in a diagonal sequence. Loosen only until the slider can be finely adjusted to prevent sudden displacement and offset.
4. Adjust the preload mechanism to eliminate clearance.
Excessive clearance: Tighten the preload screws on the side of the slider clockwise, checking with a feeler gauge as you adjust, gradually restoring preload.
Suitable preload levels:
Light preload: Suitable for low load, high-precision positioning;
Medium preload: For normal operating conditions, balancing smoothness and stability;
Heavy preload: For heavy-duty equipment, preventing wobbling during reversal.
⚠️ Never tighten bolts on one side; apply force evenly to avoid guide rail deformation.
5. Verify the adjustment effect.
Repeated testing: After adjustment, repeatedly measure with a feeler gauge and dial indicator to ensure clearance stability.
No-load test run: Run the worktable from low speed to high speed, observing for any jamming, abnormal noises, or vibrations.
Print test sample: Perform a multi-color overprint test to check if the pattern is clear and free of ghosting.
6. Replace Worn Parts When Necessary
If the following conditions occur, adjustment alone cannot repair the damage, and the relevant parts must be replaced:
Obvious scratches, peeling, or pitting on the guide rail surface;
The slider ball circulation system is stuck or damaged;
The insert is loose or the pre-tightening mechanism is malfunctioning.
Contact the original manufacturer or a professional service provider for on-site repair or replacement. Some high-value guide rails support online repair technology (such as coating repair), completed within 3 days, without disassembly.
7. Simultaneous Maintenance Recommendations
After adjustment, reapply guide rail-specific grease to reduce friction wear.
Clean the slider seal to ensure its dustproof performance is intact and prevent secondary contamination.
