• Overview
  • Work Area
  • CNC System
  • Accessories
  • Software
  • News & Case Studies
  • Specification
  • Video
  • Brochure

Excellent Accuracy and Roundness

The Non Guidebush (NGB) version of the A20 maximises material utilisation with bar remnants less than 40mm in length and offers increased accuracy for components of length no longer than 2.5 times their diameter. Ultra-fine tolerances and roundness can be achieved for components such as bearings.

 

The Citizen A20-VII combines modern technology and the highest precision for the efficient production of turned parts up to 20mm in diameter. This latest model now includes an additional X2 axis on the sub-spindle and an additional 4 tools available on the new back-working toolpost. This allows even greater simultaneous machining possibilities over the previous type VI model.

 

7 axes, 5 turning tools, 4 rotary tools and in total 12 tools for front and back machining are fitted as standard allowing great flexibility.

 

Plenty of power is available with the main spindle driven by a 3.7 kW motor and the sub-spindle 1.5 kW. The rotary tool drive also has a 0.75 kW, AC spindle motor giving 6,000RPM.

 

Rapid traverse rate is increased to 32m/min from 18m/min for type VI for a further reduction in idle time. The latest Cincom Control technology uses special Citizen software to overlap and superimpose axis movements and tool changes.

 

Comprehensive standard equipment, space-saving design, easy operation, low running costs and high productivity - all at an extremely attractive price makes the A20-VII a must-have for newcomers to sliding head lathes and for replacement of cam-controlled lathes or for the production of simple turned parts.

Work Area

Vertical Tool Holder

  • 4 rotary cross-drilling / milling spindles and 5 turning tools fitted as standard for turning, grooving, screw-cutting, parting-off etc.

  • One cross tool can be replaced with one of:

    • BSE107: 1 front live end-face

    • BSE307: 3 front live end face

      • Front: F7 - M5 (ER11).

    • BSE507: 3 front / 3 back live end face

      • Front: F7 - M5 (ER11)

      • Back: F5 - M4 (ER8)

End Working Holder 1

  • 4 stations for front machining

  • 4 stations for back machining

End Working Holder 2

  • 4 fixed stations for back machining. 3 out of the 4 can be utilised for either live or fixed end working (4,500RPM / 0.75kW).

  • Optional GSS1330 Back Slitting and Cross-Drilling Spindle:

    • ER11, 3600RPM, 3/5 Gear Ratio

    • Adjustable 90° for cross-drilling

 

 
Work Area view showing the axis configuration

Sub Spindle

  • 20mm Dia

  • 1.1 / 1.5kW

  • 8,000 RPM

  • C-Axis

Main Spindle

  • 20mm Dia

  • 2.2 / 3.7kW

  • 8,000 RPM

  • C-Axis

CNC System

The latest generation super-fast Fanuc 32i control has an NC scanning time is half that of current models. CNC processing, PLC functions and Macro execution time are also much improved.

 

Incorporates the latest Cincom Control technology using special Citizen software to overlap and superimpose axis movements and tool changes.

 

The fully positionable control console enables the operator to observe the machining area and the program on the monitor at the same time. The handwheel feature provides the operator with a safe and convenient means of proving out programs prior to selecting the automatic mode, particularly useful to newcomers to CNC operation.

 

The storage and input of program data is simplified by the PC memory card slot (PCMCIA aka. PC Card).

 

Existing users of the A20-VI can benefit from the program conversion function that automatically converts programs written for the A20-VI to the A20-VII.

Accessories

Standard

  • Main Spindle Chucking Device

  • Back Spindle chucking device

  • Headstock Cooling Device

  • Door Switch

  • Lubricating Oil Supply

  • Pneumatic Device for air sealing

  • Medium Pressure Coolant Supply Unit

  • Parts Gantry Unloading System

  • Part-off Tool Breakage Detector (Electronic type)

  • Part-off Tool Breakage Detector (Probe type)

  • Patrol Light (Signal Lamp) - 3 Colour

  • Knock-out jig for workpiece through-hole

  • Work Area Lamp

  • B Code, special software for Coolblaster

  • Cutting oil level detection

  • Automatic fire extinguisher

Optional

Choice of Barfeeder

Coolblaster High Pressure Coolant

Fume Extraction

Swarf Conveyor

 

 
 

Supporting Software Options

CNC Wizard

Low-cost Programming Aid for Citizen machines for faster and easier part-program creation. The software leads you through creation of your part-program using clear diagrams, photos and text. A simple program can be potentially be written in a matter of minutes! Full editing and communications features are built into the software along with program validation checks. Ideal for both new and experienced Citizen users.

Alarm alerting system

Automatically inform designated people in your organisation if an alarm occurs on one of your Citizen machines. Up to 100 machines can be simultaneously monitored. The message delivery can be via. voice message to land-line or mobile, SMS text message to a mobile or Email. Multiple recipients can be specified for each machine. This system is ideal for those running the machine unattended overnight.

News & Case Studies

Sorry, no news or case studies are currently available for this product.

 

 

 

 

Specifications

Technical Data

 

A20-VIICL

Axes

 

 

Number of axes

-

7

Main spindle

 

  

Max. turning diameter

mm

20

Max. turning length

 

2.5 x Diameter

Spindle speed

RPM

8,000

Drive rating

kW

3.7

No. of turning tools

-

7

Number of tools for front-end machining

-

4

C-Axis [°]

°

0.001

Sub-spindle

 

  

Max. workpiece diameter

mm

20

Max. workpiece length

 

2.5 x Diameter (50mm Max)

Drive tating

kW

1.5

Spindle speed

RPM

8,000

Number of tools for back-end machining

-

8

C-Axis

°

0.001

Driven Tools

 

  

No. of Driven Tools (transverse)

-

3

Driven Tool Motor Power

kW

0.75

Driven Tool Max. Speed

RPM

8,000

Other Information

 

  

Axis rapid Traverse

m/min

32

Space Requirement

mm

2100x1185

Weight

kg

2400

 

 

Video Presentation

Loading the player ...

NB: Requires HTML5 video support in browser or free Adobe Flash Player. If you cannot see the video please click below to download:

 

 

 

Brochure Download

A20-VII Brochure (0.5MB)

 

Requires free Adobe Reader software:

 

:Get Adobe Reader