In the daily operation of CNC machine tools, users often pay more attention to machine specifications, configuration, and machining capacity, while overlooking some simple but very important operational details. In fact, these “small habits” can directly affect machining accuracy, machine stability, and overall service life.
Today, we would like to share a practical but often ignored tip for machine tool operation — proper warm-up and idle running before machining.
1. Why does a machine tool need “warming up”?
After a machine tool has been idle for a long time, the internal lubrication conditions of key moving components such as the spindle, guideways, and ball screws become uneven. The machine structure is also in a cold state. If it is put directly into heavy machining, the following problems may occur:
- Thermal deformation leading to dimensional inaccuracy
- Unstable spindle performance affecting surface finish
- Accelerated wear of guideways and ball screws
- Increased fluctuation in overall machine precision
This effect is especially obvious in workshops with large temperature differences.
2. Recommended correct start-up procedure
To ensure the machine is in optimal working condition, we recommend following these steps each time the machine is started:
1. Idle running for 3–5 minutes
Run the machine without cutting load, allowing each axis to operate at low or medium speed so that guideways, screws, and spindle gradually reach working condition.
2. Gradually increase speed
Avoid starting with high-speed or heavy cutting. Begin with light operation and then gradually switch to normal machining conditions.
3. Check lubrication and air pressure systems
Ensure the automatic lubrication system is working properly and air pressure is stable to avoid wear caused by insufficient oil supply.
3. What improvements can this simple step bring?
Although it only takes a few minutes, consistent implementation can bring significant benefits:
✔ Improved machining dimensional stability
✔ Reduced thermal error impact on precision
✔ Extended service life of guideways, ball screws, and spindle
✔ Lower machine failure rate
✔ Improved overall surface quality of machined parts
For precision parts processing or mass production, this practice is especially important.
4. Our recommendation to users
In actual production, we strongly recommend integrating the “machine warm-up procedure” into the standard operating procedure (SOP) and ensuring operators follow it every day. This not only improves product consistency but also effectively reduces long-term maintenance costs.
Combined with regular maintenance and proper tool management, it helps keep the machine in optimal working condition at all times.
Conclusion
The performance of CNC machine tools depends not only on manufacturing accuracy but also on how they are used. In many cases, what truly creates differences in machining quality is not the machine itself, but the details of daily operation.
If you have any questions about machine operation, maintenance, or machining optimization, feel free to contact our technical team. We will continue to share more practical insights and tips.
Post time: May-08-2026