JNYO Daily Operating Guidelines for CNC Special-Purpose Machine Tools

JNYO CNC special-purpose machine tools are typically equipped with multiple functional modules and a tool magazine, allowing drilling, reaming, boring, tapping, turning, milling, and other operations to be completed in a single setup. This can improve production efficiency and machining accuracy.

To maintain stable long-term operation and consistent machining quality, follow these daily operating guidelines:

1. Pre-Operation Inspection and Warm-Up

• Daily start-up procedure: Turn on the main power and wait for the control system self-check to finish with no alarm codes. Start the hydraulic station and coolant pump, then run the spindle without load for 5–10 minutes with a gradually increasing speed so the bearings are fully lubricated. In cold winter conditions, extend the warm-up time as needed to prevent sluggish movement caused by viscous hydraulic oil.
• Check fixture compatibility: Make sure the fixture locating surfaces are clean and free of chips. After clamping the workpiece, tighten the bolts to the specified torque with a torque wrench to prevent movement. For multi-station machines, check rotary-table indexing accuracy; the angular error between adjacent stations should be no more than 3′.

2. Key Monitoring Points During Machining

• Control cutting parameters: Set spindle speed (S), feed rate (F), and depth of cut (ap) according to the process sheet. Avoid overload operation; current should not exceed 85% of the spindle rated current. During high-speed milling, reduce acceleration to limit impact and vibration.
• Observe operating status in real time: Monitor axis loads and temperature-sensor data through the CNC interface. Pay particular attention if spindle-bearing temperature exceeds 70°C. Observe chip formation: an ideal chip is a silver-gray curled chip. Stringy chips or edge chipping may indicate a dull tool or unsuitable parameters.
• Prevent automatic tool-change errors: After the tool magazine reaches its position, wait one second before executing the tool-unclamping action to prevent a dropped tool caused by a misread signal. Re-touch off every tool after replacement; do not estimate tool-offset values from experience.

3. Maintenance Intervals

• Routine maintenance (every 8-hour shift): Remove chips and coolant from the worktable and inside the guards. Check oil supply at the guideway lubrication points and manually lubricate every two hours where required. Wipe the spindle taper to prevent chips from entering and affecting accuracy.
• Weekly maintenance: Check the contamination indicator on the hydraulic filter and replace the filter element if necessary. Inspect relay and contactor contacts in the electrical cabinet for wear. Check coolant concentration; keep water-soluble cutting fluid at 5–8%.
• Monthly maintenance: Remove and clean the protective-door seals to prevent dust from entering the guideways. Use a precision level to check worktable levelness; longitudinal and transverse deviation should be no more than 0.02/1000 mm. Back up and archive CNC system parameters.