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- Multicurve CityCrown Lathe
- CNC Lentucular CityCrown Lathe
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C.N.C. Automatic Base Curve Lathe

A feature of the machine is that it can produce a base curve
which has an accurate diameter with a pre determined land width to prevent
chipping at the edge. The machine incorporates a pneumatically controlled collet
and the computer can be programmed to produce any required quantity of base
curves automatically The precision build of the lathe and the high quality of
the spindle balance ensure base curves which require a minimum of polishing and
thus retain their geometric integrity. Suitable for hard, soft and gas permeable
materials.
The C.N.C. Base Curve Lathe is an automatic machine which will
produce either single radius or lenticular base curves. With cycle times as low
as 45 seconds possible, and minimal operator attention the machine is ideal for
stock or small batch quantity prescription production. The lenticular topslides
are manually set. The lathe is computer controlled and incorporates an automatic
button loading and unloading system.
Control System for both Front and Base Curve C.N.C. Lathes
The CityCrown CNC Lathes are fitted with a standard PC, replacing the old
Epson HX20 computer, and programmed in Basic. This enables users quickly and
simply to adapt the standard programmes to their own particular production
method and requirements. It is also possible to load the machine control
computer via a second computer; several CNC lathes can be controlled from an in
house computer system.
CNC Lenticular key features:
User-friendly software
Labour saving
High quality production
Optional Accessories:
Networking capability with lens design program
Upgrade to air-bearing spindle
Lenticular setting clock and bracket - low headstock (Ref No: 5001-0005)
Lenticular setting clock and bracket - high headstock (Ref No: 5001-0006)Specifications:
Headstock: Recirculating bearing system
Spindle: Dynamically balanced, fitted with Abec 9 bearings
Spindle Drive: 24v DC motor, variable speed 0 - 9000 RPM,
dynamically braked when switched off
Collet Mechanism: Lever operated front surface
Air collet back surface
Lenticular Slide Assembly: Fitted with Abec 7 bearings. Two
slides move axially and independent to each other
Lenticular Drive: 24v DC motor velocity damped by dashpot and
gear
Lenticular Drive Control: Via user-friendly software
Headsock Drive: Precision-ground leadscrew driven by stepper
motor, software controlled.
Probe Unit: (Front surface only) 24v DC motor driven,
software controlled
Automatic Loading: (Back surface only) Fully automated
electro-pneumatic loading and unloading mechanism with a standard magazine with
the capacity for up to 60 blanks.
Diametering: (Bqck surface only) Pneumatically driven
diametering attachment, software controlled
Compressed Air Supply: (Back surface requirement only)
Pressure range 5.5 bar (80 psi) up to 6.9 bar (100 psi) consumption 85 L/min
(3cfm)
Computer: IBM compatible PC - entry level
Electrical Supply: 110, 115, 200 or 230 volt, 50 or 60 Hz
Dimensions: Front surface 1100mm x depth 550mm x height 570
mm
Weight: 150 kg

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