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 which 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 bHigh 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

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Turning performance on tungsten carbide Surface roughness: < 5 nm Sa
Form accuracy: < 0.15 µm P-V
Programming resolution 0.01 nm linear
0.0000001° 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 PSI
204 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-sec
9,000 line encoder
0.010 arc-sec
16,200 line encoder
C-axis Position Accuracy +/- 1 arc-sec +/- 1 arc-sec
C-axis Max Speed 4,000 RPM 2,000 RPM
4,000 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 Machine
115 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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