Related Glossary Terms
- computer numerical control ( CNC)
computer numerical control ( CNC)
Microprocessor-based controller dedicated to a machine tool that permits the creation or modification of parts. Programmed numerical control activates the machine’s servos and spindle drives and controls the various machining operations. See DNC, direct numerical control; NC, numerical control.
Fluid that reduces temperature buildup at the tool/workpiece interface during machining. Normally takes the form of a liquid such as soluble or chemical mixtures (semisynthetic, synthetic) but can be pressurized air or other gas. Because of water’s ability to absorb great quantities of heat, it is widely used as a coolant and vehicle for various cutting compounds, with the water-to-compound ratio varying with the machining task. See cutting fluid; semisynthetic cutting fluid; soluble-oil cutting fluid; synthetic cutting fluid.
Machining operation in which material is removed from the workpiece by a powered abrasive wheel, stone, belt, paste, sheet, compound, slurry, etc. Takes various forms: surface grinding (creates flat and/or squared surfaces); cylindrical grinding (for external cylindrical and tapered shapes, fillets, undercuts, etc.); centerless grinding; chamfering; thread and form grinding; tool and cutter grinding; offhand grinding; lapping and polishing (grinding with extremely fine grits to create ultrasmooth surfaces); honing; and disc grinding.
Star Cutter Company has announced enhancements to its Star NXT 5-axis Tool Grinder, a versatile 5-axis CNC machine with a small footprint and a large grind zone. Designed in a modular fashion that offers quick adaptation to application requirements, the NXT’s mechanical, software and automation features and functions have been updated.
Mechanical improvements to the NXT design provide higher system rigidity and improved contamination containment, as well as wash down bed and coolant boost pump upgrade options. The machine’s control software now features the latest Flexium Tools with NUMROTO 4.2.0, as well as an innovative solution for freeform grinding using ESPRIT CAD/CAM capability with 3D simulation and special capability for medical components.
The updated automation package accommodates denser pallet arrays for improved lot sizes and runtime, while delivering smoother robot operation and better repeatability. Additionally, the system can now adapt to multiple part profiles to be produced within a single run. An optional laser marking system has also been integrated for automated tool marking, in addition to many other new features.
Standard and custom options for process enhancement are available, including a new clearance-optimized flip-up and air-actuated tailstock and new work holding solutions. Real-time tracking of temperatures, spindle hours, bearing travel distances have been added for improved preventative maintenance functionality.
The NXT 5-axis Tool Grinder has a 6.5’ W by 7.5’ L footprint with a 30.2” x 19.9” x 25.6” (LWH) grinding zone and ability to run tools up to 10” (250 mm) in diameter. It has an optional 28kW synchronous spindle capable of 20,000 RPM and Fanuc robot automation with 0.196” – 1.250” (5 -32 mm) gripper assembly, as well as best-in-class NUMROTO grinding software. Backed by application support, the Star Cutter NXT grinders are designed, manufactured and serviced in the United States.