DJC-350A Ultra-Precision Single-Point Diamond Lathe is independently developed by Atoman Science and Technology Ltd. The surface roughness of the processed parts may reach the nanometer level. It is the necessary instrument for processing various precision optical lenses and ultra-precision moulds.
 
Features
The surface roughness of the processed parts may reach the nanometer level, and the maximum diameter reaches up to 350mm. It is capable of processing varieties of high-precision flat, spherical and aspherical parts as well as off-axis and free-form surface parts of copper, aluminum, single crystal germanium, zinc selenide, resin, PMMA and other similar materials. In the three-axis mode, it can also process off-axis parts, cylinders, meridian planes and other non-rotationally symmetric parts and free-form surfaces. Equipped with special tools, it is further capable of processing micro structural parts, such as diffractive parts, Fresnel lenses, etc.
Configurations
● Adopts ultra-precision air bearings with no friction consumption but high rotation accuracy, capable of C axis functions.
● Natural granite base to ensure long-term stability of the machine.
● PMAC control card.
● The spindle adopts built-in motors and high-precision encoder.
● The ends of the spindle are installed with balance discs and vacuum chucks.
● Ultra-precision hydrostatic slides to ensure good stiffness and damping.
● Both X / Z axes are driven by linear motors to achieve full-closed loop control.
 
Technical Parameters
Z axis (along the spindle)
1、Maximum stroke: 350mm
2、Straightness: 0.2μm/100mm
3、Positioning accuracy: 0.5μm±0.5μm×lmm/100mm
4、Repeated positioning accuracy: 0.3μm
5、Resolution: 1nm
6、Maximum feed speed: 20mm/s
X axis (vertical to the spindle)
1、Maximum stroke: 350mm
2、Straightness: 0.2μm/100mm
3、Positioning accuracy: 0.5μm±0.5μm×lmm/100mm
4、Repeated positioning accuracy: 0.3μm
5、Resolution: 1nm
6、Maximum feed speed: 20mm/s
 C axis (workpiece axis)
1、Radial beat and ending beat:  0.05μm
2、C axis rotation speed: 0-1000rpm; spindle rotation speed: 4000rpm
3、Positioning accuracy of C axis: 30″
4、Positioning accuracy of C axis:        10″
 
Operation Environment Requirements
1、Isolation foundation required. Instrument operation temperature 20±2℃. Temperature gradient within 1 day lower than 2℃. Humidity < 50%.
2、Air filter accuracy: 0.5um. Oil free. Water free.
3、Atmosphere pressure ≥ 0.6Mpa.
4、Airflow ≥ 0.3m³/min.
5、Voltage: 380V. Power of instrument: ≤5KW.

Ultra-precision processing of aspherical lenses and IR lenses.
Processing of moulds to perform injection manufacturing of high-precision imaging aspherical lenses.
Processing of copper and aluminum reflectors.
Processing of copper and aluminum free-form surface reflection mirrors, which alters the traditional lens. designing theory and is special purpose lenses in the field of laser and so on.