Regular Maintenance
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Mill Maintenance Schedule
Frequency | Completed | Item |
Daily | Check coolant level (PCNC 1100: 7-gallon capacity, PCNC 770: 5-gallon capacity) | |
Check oiler level and top off as needed (Auto Oiler capacity 2.1 quarts / Manual Oiler 0.25 quart) | ||
Retract and release manual oiler plunger each time mill is powered on and after every four hours of operation | ||
Clean chips from ways, carriage, and bellows’ covers | ||
Spray exposed, non-painted metal surfaces with WD-40® or similar to prevent rust |
Weekly | Check drawbar for wear; grease and adjust if needed | |
Clean chip basket on coolant tank | ||
Check air gauge/regulator for proper PSI (90 PSI minimum) | ||
Use mild cleaner to clean all exterior surfaces (no solvents) |
Monthly | Remove coolant tank pump. Clean out sediment buildup in tank; reinstall | |
Inspect electrical cabinet vent(s) for dust build up; if necessary wipe vents with clean cloth. If dust accumulation is excessive, use compressed air to remove | ||
Pull back way covers and inspect ways and ball screw for proper lubrication (on all axes) |
Every Six Months | Inspect spindle belt for nicks, fraying, or other noticeable signs of wear | |
Inspect way covers as needed to ensure proper operation; replace as needed | ||
Inspect oil system for blockages; clean/replace as needed | ||
Check lubrication hoses for signs of wear or cracking; replace as needed | ||
Check X-axis flex conduit for signs of wear or cracking; replace as needed |
Every 12 Months | Check limit switches for proper function; replace as needed | |
Check door switches for proper function; replace as needed |
Rust Prevention
Exposed iron and steel surfaces will rust if proper care is not taken to protect them. The following recommendations will slow or reduce the onset of surface rust.
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Way covers serve an important function – they keep chips and abrasive debris from damaging the slideways. Clean and inspect the way covers per maintenance schedule.
Flood Coolant System
Regular maintenance of the flood coolant system will prolong the service life of the coolant pump.
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For instructions on how to measure lost motion, see: Lost Motion Testing - PCNC 770
For instructions on how to adjust your gibs and/or ACB’s, see: Mill Gib/AC Bearing Adjustment and Backlash Compensation - PCNC 770
Geometry Adjustment of Precision Mating Surfaces
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NOTE: For information on rebuilding PCNC 1100 spindle cartridges, refer to Tormach service bulletin PCNC 1100 Spindle Rebuild.
PCNC 770 only
During operation, sustained high spindle speed will bring the spindle bearings to about 155°F (68°C). This is a normal condition. Spindle bearing preload is set at the factory and is not operator-adjustable
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