Unplanned CNC machine breakdowns are one of the biggest causes of production loss in manufacturing. A structured Preventive Maintenance (PM) program can dramatically reduce breakdowns, extend machine life, and lower your overall maintenance costs.
Here is a comprehensive CNC machine preventive maintenance checklist used by our engineers at JJ Automation.
Daily Checks
- Check lubrication oil level in the slideway lubrication unit
- Check coolant level and concentration
- Clean chips and swarf from the machine bed, turret, and spindle area
- Check for any unusual noise or vibration during operation
- Check spindle warm-up cycle is being followed
- Verify all axis movements are smooth with no jerking or hesitation
- Check air pressure at the pneumatic unit (if applicable)
Weekly Checks
- Clean the CNC control panel and operator interface
- Check and clean the servo drive and spindle drive cooling fans
- Inspect coolant filter and replace if clogged
- Check all limit switches and home position sensors
- Lubricate ball screws and linear guides manually (if auto-lube is not fitted)
- Check hydraulic oil level (if applicable)
Monthly Checks
- Check tightness of all electrical connections in the control panel
- Inspect servo motor and spindle motor for bearing noise or vibration
- Check encoder cables for damage, chafing, or loose connectors
- Clean the CNC control panel interior — remove dust from PCBs and fans
- Check axis backlash and adjust if necessary
- Inspect the spindle taper for damage or wear
- Test all alarms and safety interlocks
Quarterly Checks
- Replace slideway lubrication oil filter
- Check spindle belt tension and condition (replace if worn)
- Inspect all pneumatic and hydraulic seals for leaks
- Check the CNC battery voltage (replace if below 3V — Fanuc A98L-0031-0025)
- Back up all CNC parameters, programs, and tool data
- Check tool changer operation — lubricate as required
Annual Checks
- Replace CNC battery (Fanuc A98L-0031-0025)
- Replace servo drive and spindle drive cooling fans
- Replace coolant and clean the coolant tank
- Full geometric accuracy check — levelling, squareness, and positioning
- Inspect all PCBs and control cards for corrosion or burnt components
- Check and recalibrate all axis drives and current limits
- Inspect spindle motor brushes (if brush-type motor)
Why Choose JJ Automation for Your AMC?
JJ Automation provides Annual Maintenance Contracts (AMC) and Preventive Maintenance services for Fanuc, Mitsubishi, and Siemens CNC machines across India. Our experienced engineers handle everything from routine PM visits to emergency breakdown support.
Benefits of our AMC:
- Priority breakdown response — 24x7 support
- Scheduled PM visits
- Discounted spare parts pricing
- Machine health reports
- 📞 Call/WhatsApp: +91 8802212394
- ✉ Email: jj.automation@outlook.com
- 🌐 Website: www.jjautomation.in