Sliding Headstock Type CNC Automatic LatheA20

Application Design System CITIZEN Corporate Identification System

2 A20 | Citizen

The Citizen A20, a 5-Axis CNC sliding head machine, with excellent cost / performance ratio now also featuring the ability to switch between guide bush and non-guide bush types

The A20 has further evolved as a 5-axis machine for φ20 mm applications with the advantage that it can now be used with or without a guide bush in a simple, easy to use procedure.

In standard guide bush mode it can machine both short parts and also long slender workpieces, and without a guide bush for shorter parts (maximum 3 x material diameter) with reduced bar end remnants.

Machine performance has also been improved with the main spindle now capable of up to 10,000 rpm enhancing machining operations on smaller diameter bar material and the machining length per single chucking has been extended to 200 mm. C axis is also available on both spindles.

The through bore of the main spindle has also been increased to 26 mm allowing the option of using bar material of up to 25 mm with optional oversize kit.

X1X1X1

X2X2X2

Y1Y1Y1

Z1Z1Z1

Z2Z2Z2

Turning tools on the gang tool post5 (12mm Sq., 13mm Sq.)

Tools for back drilling8 x 25.4mm Dia

Rotary cross power tools4 off

One spindle is removable and can be replaced with holders below

Rotary tools on the back tool post (option)

Tools for front drilling4 25.4mm Dia

Tooling System

Triple face power BSE607Main spindle only

Triple face power BSE707Main & sub spindle

A20 Tooling Example

Switchable

Non-guide bush type

Guide bush type

A20 | Citizen 3

Tooling system

X1X1X1

X2X2X2

Y1Y1Y1

Z1Z1Z1

Z2Z2Z2

Turning tools on the gang tool post5 (12mm Sq., 13mm Sq.)

Tools for back drilling8 x 25.4mm Dia

Rotary cross power tools4 off

One spindle is removable and can be replaced with holders below

Rotary tools on the back tool post (option)

Tools for front drilling4 25.4mm Dia

Tooling System

Triple face power BSE607Main spindle only

Triple face power BSE707Main & sub spindle

A20 Tooling Example

Switchable

Non-guide bush type

Guide bush type

X1X1X1

X2X2X2

Y1Y1Y1

Z1Z1Z1

Z2Z2Z2

Turning tools on the gang tool post5 (12mm Sq., 13mm Sq.)

Tools for back drilling8 x 25.4mm Dia

Rotary cross power tools4 off

One spindle is removable and can be replaced with holders below

Rotary tools on the back tool post (option)

Tools for front drilling4 25.4mm Dia

Tooling System

Triple face power BSE607Main spindle only

Triple face power BSE707Main & sub spindle

A20 Tooling Example

Switchable

Non-guide bush type

Guide bush type

4 A20 | Citizen

Machine performance & usability upgraded

The A20 machine now features the capability to switch between guide bush and non guide bush.

Spindle speed and main spindle chucking length have both been increased with good chip clearance and Citizens’ renowned ease of use and user friendly features.

Maximum spindle speed of 10,000 rpm.

Main spindle speed has been increased to 10,000 rpm enabling enhanced efficiency when using small diameter material.

200 mm/1 chucking

A longer 200 mm machining stroke reduces the need for re-chucking work-pieces hence reducing cycle time.

Support for stock material up to φ25 mm (option)

The spindle through bore is now 26mm enabling the use of up to 25mm / 1” material by installing the optional oversize kit.

A20 | Citizen 5

Machine performance & usability upgraded More speed, more stroke, more capacity = improved productivity

LED work lightAn energy efficient LED worklight is provided as standard giving a well illuminated working environment.

NC program transferNC programs can be input and output via. USB memory stick, CompactFlash card or RS232 connection.

Coolant nozzleCoolant nozzles are provided at the appropriate locations to ensure that sufficient coolant can be supplied to the point of machining.

Parts collectionThe large capacity collection box reduces the frequency of emptying.An optional workpiece conveyor is also available.

Chip collectionThe large capacity tank reduces the frequency of emptying.An optional chip conveyor is also available.

Adjustable operation panelThe pivoting operation panel enables easy operation whilst simultaneously viewing the machining process.

6 A20 | Citizen

Clear for anyone

On-machine program check functionThe program can be ran round using the handwheel giving enhanced user confidence. The program can run in forward or reverse directions and can paused to edit before restarting.

Direct C-axis indexing functionDirect C-axis indexing enables deceleration direct to chosen index position eliminating the wasted time of performing zero return.

Display of code listThe function displays the list of G, M, and T codes including explanations - useful aid to programming.

Axis feed overlap functionThe next axis feed motion starts without waiting for completion of the current motion of another axis. This cuts out wasteful idle time and also suppresses unwanted vibration.

Easy viewing with text size changeTwo text size settings can be applied to each screen (large text display illustrated).

Productivity improvements

Screen display is easy to view and read

Idle time is slashed using the pre-processing function in the ‘Cincom Control’ that analyses the machining program before it is run to minimise processing and calculation times.

A20

Rotating

Rotating Indexing

Indexing

Direct C-axis indexing function

A20

Axis feed overlap areas

Reduced idle time

Conven-tional machine

Conven-tional machine

Stoprotation

Zeropointreturn

A20 | Citizen 7

Machine layout

A20 Standard Machine

A20 Option-installed Machine

Machine specificationStandard accessories

Main spindle chucking device Coolant unit (with level detector)

Back spindle chucking device Door lock

Cut-off tool breakage detection Pneumatic device for air sealing

Work light (LED) Machine relocation detector

Workpiece separator

Lubricating oil supply unit (with level detector)

Special accessories

Rotary guide bushing device Chip conveyor

Fixed guide bush Medium-pressure coolant unit

Callback chute Coolant flow rate detector

Workpiece conveyor Signal lamp

Knock-out jig for through-hole workpiece

Product receiver shelf for long workpiece device

3-color signal tower

Standard NC functions

NC unit dedicated to the A20 Tool offset pairs : 32

8.4 inch color LCD Operating time display function

On-machine program check function Automatic power-off function

Preparation function Continuous thread cutting function

Spindle speed change detector Program prior analysis function

Nose radius compensation

Constant surface speed control function

Program storage capacity : 40m (approx.16KB)

Product counter indication (up to 8 digits)

Main spindle indexing at 15° intervals

Special NC functions

Program storage capacity 2560m (approx.1MB)

Tool offset pairs : 49 Spindle 1°indexing function

Submicron commands Back spindle 1°indexing function

Spindle synchronized function Front/Back spindle C-axis function

Rigid tapping function Tool life management I

High speed rigid tapping function Tool life management II

Chamfering, corner R Optional block skip (9 sets)

Canned cycle drilling External memory program driving

Drawing dimension direct input Network I/O function

Multiple repetitive cycle for turning Inch command

User macros Sub/inch Command

Y-axis offset Hob/polygon function B

Item

Max. machining diameter (D)

Max. machining length (L)

Spindle through-hole diameter

Main spindle speed

Spindle speed of the gang

rotary tool

Max. chuck diameter of back spindle

Max. protrusion length of the back

spindle workpiece

Back spindle speed

Max. protrusion length

Max number of tools to be mounted

Tool size

Tool (gang tool post)

Sleeve

Chuck and bushing

Main spindle collet chuck

Back spindle collet chuck

Rotary tool collet chuck

Chuck for drill sleeves

Guide bushing

Rapid feed rate

All axes (except X1)

X1 axis

Motors

Spindle drive

Tool spindle drive

Back spindle drive

Coolant oil

Lubricating oil

Centre height

Rated power consumption

Full-load current

Main breaker capacity

Air pressure and air flow rate for

pneumatic devices

Weight

A20 VII (A20-3F7)

20mm Dia. (25mm Dia. OP)

GB: 200mm/ 1 chucking (188mm:

25mm Dia spec) GBL: 2.5D

26mm Dia.

Max. 10,000min-1

Max.6,000min-1

(Rating 4,500 min-1)

20mm Dia. (25mm Dia. OP)

50mm

Max. 8,000 min-1

100mm

26

12mm Sq. x 120mm

(13mm Sq. OP)

25.4mm Sq.

F25 / F30 for 25mm option

F25 / F30 for 25mm option

ER11, ER16

ER11, ER16

FG206-M / FG521-M

32m/min

18m/min

2.2/3.7kW

0.75kW

1.1/1.5kW

0.4kW

0.003kW

1,050mm

7.1kVA

20.2A

30A

0.5Mpa, 47NL

2,200kg

PRINTED IN THE UK - JUN 2017

CITIZEN MACHINERY CO., LTD. Japan Citizen Machinery Co Ltd Tel: 81-267-32-5901 Fax: 81-267-32-5908 4017-6 Miyota, Miyota-machi, Kitasaku-gun, Nagano-ken, 389-0206, Japan Europe - Germany Citizen Machinery Europe GmbH Tel: 49-711-3906-100 Fax: 49-711-3906-106 Mettinger Strasse 11, D-73728 Esslingen, Germany Europe - UK Citizen Machinery UK Ltd Tel: 44-1923-691500 Fax: 44-1923-691599www.citizenmachinery.co.uk 1 Park Avenue, Bushey, WD23 2DA, UK All specifications are subject to change without prior notice. This product is an export control item subject to the foreign exchange and foreign trade act. Thus, before exporting this product, or taking it overseas, contact your CITIZEN machine dealer. Please inform your CITIZEN machine dealer in advance of your intention to re-sell, export or relocate this product. For the avoidance of doubt products includes whole or part, replica or copy, technologies and software. In the event of export, proof of approval to export by government or regulatory authority must be evidenced to CITIZEN. You can operate the machines after the confirmation of CITIZEN. CITIZEN is a registered trademark of Citizen Holdings Co., Japan.