I. CNC machining The most critical step is the first cut, because careful operation and verification can help identify any abnormalities in cutter length compensation, cutter diameter compensation, program settings, and spindle speed, thereby preventing damage to the workpiece, CNC tools, and CNC lathes.

II. Follow the trial cutting procedure as outlined below:

1. The first height is the maximum upward movement of 100 mm; use your eyes to verify whether it’s accurate.

2. Set the “Quick Move” control to 25% and the feed rate to 0%.

3. When the CNC tool approaches the machining surface (approximately 10 mm), pause the machine.

4. Verify that the remaining itinerary and procedures for the routine check are accurate.

5. After powering on again, place one hand on the pause button, ready to stop the equipment at any time, while using the other hand to control the feed rate.

6. When the CNC tool is very close to the workpiece surface, you can stop again. Be sure to check the remaining travel of the Z-axis.

7. After the cutting path for machining has become smooth and stable, adjust all controls back to their normal operating states.

3. After entering the program name, use a pen to copy the program name displayed on the screen and then carefully verify it against the program flow sheet. When starting the program, be sure to check whether the tool diameter specified in the program matches the information on the program flow sheet. Also, promptly fill in the file name and tool diameter size in the operator’s signature field on the program flow sheet. It is strictly prohibited to fill in this information either after or before the actual operation.

4. Under normal circumstances, during the roughing of workpieces: CNC machining Personnel must not leave their posts. If they need to leave temporarily—for example, when changing tools or assisting with the adjustment of other CNC lathes—they must obtain permission from others in specific circumstances. CNC team members or come by regularly for inspections.

V. While doing Zhongguang, CNC machining Pay attention to areas that haven't been adjusted during roughing, and avoid letting the CNC tool collide with these areas.

6. Cut off the program flow. If the program flow is interrupted during processing and restarting it would waste excessive time, the team leader and the programmer should be notified to modify the program flow by removing the already executed portion.

7. The program flow has encountered an anomaly. If the program flow encounters an unusual situation and you’re unsure how to proceed, you can temporarily suspend the process to observe its entire sequence and then decide on the next course of action.

8. During CNC machining, the feed rate and spindle speed provided by the programmer may be adjusted as appropriate based on the specific circumstances. However, special attention should be paid to ensuring that the feed rate is not set too high when roughing small copper parts in open-air conditions, to prevent vibration from causing the workpiece to loosen or come loose.

9. During the CNC machining process of product workpieces, the CNC machining operation must be carefully checked against the individual part drawings to ensure there are no abnormalities. If any discrepancies between the two are detected, the equipment must be immediately stopped and the team’s chief supervisor notified to verify whether any anomalies exist.

10. When using CNC cutting tools longer than 200 mm, it is essential to pay close attention to issues such as machining allowance, feed depth, spindle speed, and travel speed, in order to avoid tool deflection. Additionally, the travel speed at corner locations should be carefully controlled.

11. For procedures that specify inspection of the diameter of CNC cutting tools, operators must perform their duties conscientiously and meticulously record the measured diameters. If any measurement falls outside the specified tolerance range, operators should immediately report it to their team leader or proceed with tool replacement.

12. When the CNC lathe is operating automatically or during idle periods, operators must go to the workstation to understand the specific details of the remaining machining programs, and prepare and sharpen appropriate CNC tools in advance for use in the next machining operation, thus preventing any interruptions in equipment operation.

13. Errors in machining processes are the primary cause of wasted time: incorrect use of inappropriate CNC tools, errors in the sequencing of CNC machining operations, wasting time on areas that do not require machining or on non-computer-controlled machining locations, and improper selection of machining conditions.

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