Diamond Turning with Nanoform® Xtc

If you can diamond turn tungsten carbide using the Nanoform-XTC from Precitech, why would you grind it? Diamond turning provides several benefits that conventional grinding does not.

Diamond turning has feed rates of up to 6 mm per minute, which means that the finishing of standard components can take less than one minute. In addition to this diamond, turning allows established techniques to be followed for the rapid manufacturing of complex diffractive (kinoform) molds.

The Nanoform Xtc can produce surfaces with under 5 nm Sa and 150 nm PV, in addition, the technique also allows parts that require little post-polishing to be produced in minutes rather than the hours taken using traditional grinding methods.

Diamond turning has also been shown to be high-speed HS 75 Spindlee effective on infrared materials such as Silicon (Si), Germanium (Ge), Calcium Fluoride (CaF₂), Zinc Sulfide (ZnSe) and Zinc Selenide (ZnSe).

Diamond turning on sapphire, glass (BK₇) and Silicon Carbide (SiC) is currently in progress.

Key Specifications

.	.
Turning performance on tungsten carbide	Surface roughness: < 5 nm SaForm accuracy: < 0.15 µm P-V
Programming resolution	0.01 nm linear0.0000001° rotary
Ultimate load capacity	136 kg (300 lbs.) @ 100 PSI
Standard swing capacity	250 mm dia.

Technical Specifications

Machine Base and Control	Description
Machine Base	Sealed natural granite base provides exceptional long term machine tool stability
Machine Type	Ultra precision two, three, or four axis CNC contouring machine
Vibration Isolation	FEA optimized dual sub-frames and integral self-leveling TMC MaxDamp^® isolators (Optional PEPS^® II-VX active vibration cancellation available)
Control System	UPx™ Control System with optional Adaptive Control Technology
Operating System	QNX real time operating system
Programming Resolution	0.01 nm linear / 0.0000001° rotary
File Transfer/Storage	USB, CD, Ethernet, On-board data storage backup
Turning Performance	Surface Roughness < 5.0 nm Sa, Form Accuracy < 0 .15 µm P-V,measured on a 10 mm dia., 15 mm convex sphere, tungsten carbine test part

Linear Hydrostatic Slideways	Description
Type	Hydrostatic bearing slideways with symmetrical linear motor placement and liquid cooling
Travel	X and Z: 220 mm (8.6 in.)
Maximum Feedrate	4,500 mm/min. (177 in./min.)
Drive System	Linear motor
Position Feedback Resolution	8 pm (0.008 nm)
X-axis Straightness	Horizontal (critical direction): 0.2 µm (8.0 µin.)full travel 0.05 µm/25 mm (2.0 µin.)
Z-axis Straightness	Horizontal (critical direction): 0.2 µm (8.0 micro in.)full travel 0.05 µm/25 mm (2.0 µin.)
Vertical Straightness	0.375 µm (15 µin.) full travel
Hydrostatic oil supply system	Hydro-7 Smart Servo Control, low pulsation pump, optional thermal control

Workholding/Positioning Spindle	High Speed HS 75 Spindle	High Performance HS 150 Spindle
Air Bearing Type	Slot-type thrust bearing	Slot-type thrust bearing
Material	Steel shaft/Bronze journal	Steel shaft/Bronze journal
Motor	Integral brushless motor	Integral brushless motor
Ultimate Load Capacity	45 kg (100 lbs.) @100 PSI	136 kg (300 lbs.) @100 PSI204 kg (450 lbs.) @150 PSI
Axial Stiffness	105 N/µm (600,000 lbs./in.)	230 N/µm (1,314,000 lbs./in.)
Radial Stiffness	35 N/µm (200,000 lbs./in.)	130 N/µm (743,600 lbs./in.)
Motion Accuracy	Axial/Radial ≤ 20 nm (0.8 µin.)	Axial/Radial ≤ 15 nm (0.6 µin.)
Thermal Control Optional	Liquid cooled chiller +/- 0.1 °C Accuracy	Liquid cooled chiller +/- 0.1 °C Accuracy
C-axis Feedback Resolution	0.018 arc-sec9,000 line encoder	0.010 arc-sec16,200 line encoder
C-axis Position Accuracy	+/- 1 arc-sec	+/- 1 arc-sec
C-axis Max Speed	4,000 RPM	2,000 RPM4,000 RPM with 9,000 line encoder
Work Holding Spindle Max speed	18,000 RPM	10,000 RPM

Facility Requirements
Power	208 or 230 VAC - 3.0 KVA 1 phase - 50/60Hz for DT Machine115 or 230 VAC – 1.5 KVA 1 phase 50/60 Hz for µ-LAM System
Air Supply	Typical: 12 SCFM @ 100 PSIG
Machine Footprint (W x L x H)	929 x 2152 x 1790 mm (36.6 x 84.8 x 70.5 in.)

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