2. Exceptional Productivity and Cost
Performance in a 5-axis 20 mm Machine
The A20 has been acclaimed by custom- includes an X2 axis on the back spindle Non-Guide Bushing Model
ers as a highly rigid and reliable, low-cost enabling front/back simultaneous machin- Also Available
machine. Now the A20 Type VII model ing. This, in combination with the rapid
contains 5 axes, 4 rotary tools and sub- feed rate, has substantially With the increase in material costs in
spindle. The fully specified A20VII cut cycle times. High reli- recent years, less waste with the non-
ability is assured through guide bushing A 20VII might be right
conformity with IP54. for you. The non-guide bushing model
doesn’t require the spaces between the
guide bushing and collet chuck so there
is less waste. In addition, the powerful
chucking force enables heavy cutting,
minimizes roughness and improves
roundness.
Non-guide bushing spindle
Streamline Control
Streamline Control is a technique unique to Citizen that produces fast and smooth movements. It reduces idle time without any effect
on cutting and achieves substantial reductions in cycle time.
Conventional Conventional
Machine Machine
Z
Rotation Zero
stop point
return
X
Rotating Indexing
A20 A20
Axis feed overlapping areas
Z
Direct
C-axis
indexing X
Rotating Indexing Reduced idle time
Direct C-axis indexing Axis feed motion overlap function
Direct C-axis indexing enables deceleration direct to the chosen The next axis feed motion starts without waiting for completion
index position, eliminating the wasted time of performing zero return. of the current motion of another axis. This cuts out wasteful idle
time and also suppresses unwanted vibration.
02 Cincom A20VII
3. 4 Rotary Tools for Cross Machining
4 Rotary tools (standard)
One Quill type rotary tool position and cross-milling spindle (BSC210)
comes with machines as standard. The maximum tool spindle
speed is 6,000 rpm (rating 4,500 rpm).
CS Quick Wedge
This tool clamping system is a standard feature that simplifies and Turning tools on the
speeds up tool setting. gang tool post
5 (½" Shank Tool)
End Face Milling Spindle (option)
The optional Quill type end face drilling spindle (BSE107) can re-
place the standard cross-milling spindle (BSC210). Maximum tool
length is 40 mm (1.57”).
One rotary tool position is Quill Type
Cross-milling spindle End face drilling spindle
BSC210 (ER16) BSE107 (ER11)
X1 Front spindle
Max: 8,000 rpm
Rotary tools on 165mm/1 chucking
the gang tool post 2.50/1 chucking (NGB)
Max: 6,000 rpm
(rating 4,500 rpm) Y1
Back spindle
Max: 8,000 rpm
Z1
X2
Z2
2
Cincom A20VII 03
4. High Rigidity and Convenient Features
Left/Right symmetrical bed High-rigidity spindle construction Chip conveyor, long workpiece
With a bed 1.8 times as heavy as those High-rigidity spindles are the key compo- machining unit (option)
of existing machines, the machine is con- nents for precision machining. The spindle Long workpiece machining unit enables the
structed to counter thermal displacement. design offers high resistance against loads discharge of long workpieces (max. 600 mm)
The relatively small thermal displacement in the radial direction (direction perpendicu- through the hollow back-spindle. Chip con-
of the bed during long periods of operation lar to the spindle axis) for superior cutting veyor discharges chips outside the machine.
promotes high accuracy. performance, high accuracy and smooth
surface quality.
High-rigidity roller guides
on all sliding axes
Roller guides, which are characterized by
high rigidity, have been adopted for the slide
axes (X1, Y1, Z1, Z2). Since rollers show
little elastic deformation under loads, they
have a broad area of contact with their track
to provide rigidity with quiet and smooth
operation.
Work Conveyor (option)
The workpiece conveyor can handle prod-
ucts up to 80 mm in length, discharging to
the front of the machine.
Large Capacity Coolant Tank
A 150-liter, large capacity coolant tank is
equipped as standard, allowing long periods
of continuous operation.
04 Cincom A20VII
5. User Friendly for Ease of Operation
Operation Panel PC Card Slot Text size change
The pivoting operation panel enables easy NC programs can be input and output by Two levels of text size can be set on each
operation while simultaneously viewing the using the PC card slot on the front face of screen (the screen shown here is displaying
machining process. the operation panel. the larger text size).
Chip Receiver Box Code list display
The large capacity box and generous sized You can display a list of G, M and T codes
door makes cleaning easy. that feature explanations of their functions
for easy operation and programming.
Parts Collection Box On-machine program check function
The large capacity collection box reduces This function allows you to execute an NC
the need for frequent emptying. program forward and in reverse using man-
ual handle feed, after stopping temporarily
during the check. You can edit the program
and re-run it to check the operation.
Cincom A20VII 05
6. Accessories
Coolant & AGB systems
Coolant nozzle Through tool coolant
The nozzle for high or medium pressure coolant system is effec- High pressure system is effective for through tool coolant even for
tive for front/back drilling and clearing around the guide bushing. smaller diameter drills.
Cool blaster (high pressure coolant system) Adaptive guide bushing (AGB) system
High pressure up to 14MPa (2000 psi) can control chips, improve AGB systems can be used in place of standard guide bushing units
the surface finish, increase tool life and reduce cycle time. Avail- for non-ground material. This system uses a double taper bushing
able with 5 or 10 ports. which will always close parallel, and constant pressure is applied
to compensate for any bar deviation up to .008” in diameter.
C320 Barfeeder
The MCC C320 automatically feeds round, square and hexagonal
bar stock into the A20VII in lengths up to 12’ and a diameter range
of 3-20 mm.
06 Cincom A20VII
8. Machine Specifications
Item A20VII A20VIIC Standard accessories
Main spindle chucking device
Guide bushing Non-guide bushing
Back spindle chucking device
Maximum machining diameter (D) 20 mm Headstock cooling device
Maximum machining length (L) 165 mm / 1 chucking 2.5D / 1 chucking 4-gang rotary tool driving devices
(Z1 stroke 55 mm) Coolant device (with level detector)
Lubricating oil supply unit (with level detector)
Maximum front drilling diameter 10 mm
Machine relocation detector
Maximum front tapping diameter (tap, die) M8 Door lock function
Spindle through-hole diameter 31 mm 28.5 mm Workpiece separator
Pneumatic device for air sealing
Main spindle speed 8,000 rpm Cut-off tool breakage detection
Maximum drilling diameter of gang rotary tool 7 mm Lighting
Maximum tapping diameter of gang rotary tool M6 Rotary guide bushing device
Spindle speed of gang rotary tool max 6,000 rpm (rating: 4,500 rpm) Optional accessories
Maximum chuck diameter of back spindle 20 mm Knock-out jig for through-hole workpiece
Maximum workpiece length for front side ejection 100 mm 2.5D (max. 50 mm) Workpiece conveyor
Chip conveyor
Maximum drilling diameter 8 mm Workpiece basket on back spindle
in back machining process Coolant flow rate detector
Maximum tapping diameter M6 Patrol light
in back machining process 3-color signal tower
Long workpiece unit
Back spindle speed 8,000 rpm
Number of tools to be mounted 21 Standard NC functions
Turning tools on the gang tool post 5 NC unit dedicated to the A20
Cross rotary tools 4 7.2-inch monochrome LCD
Pre-processing function
Tools for front drilling 4 Program storage capacity: 80m
Tools for back drilling 8 (4+4) Tool offset pairs: 49
Tool size Product counter indication (up to 8 digits)
Spindle speed change detector (main & back)
Tool (gang tool post) ½", ( 12mm)
Automatic power-off function
Sleeve 1" (25.4 mm) Main spindle indexing at 15° intervals
Chuck and bushing Main & Back spindle C-axis function
On-machine program check function
Main spindle collet chuck TF25 BL25
Constant surface speed control function
Back spindle collet chuck TF25 (main & back spindle)
Rotary tool collet chuck ER16 Canned cycle for threading
Chuck for drill sleeves ER16 Variable lead thread cutting
Chamfering, corner R
Guide bushing TD25NS — Direct input of drawing dimensions
Rapid feed rate Spindle synchronized function
X2, Y1, Z1, Z2 axes 32m / min Milling interpolation
Multiple repetitive cycle for turning
X1 axis 18m / min
Canned cycle drilling
Motors Rigid tapping function
Spindle drive 2.2 / 3.7 kW Y-axis offset
Tool life management I
Tool spindle drive 0.75 kW
Tool life management II
Back spindle drive 1.1 / 1.5 kW User macros
Coolant oil 0.25 kW Inch/metric conversion
Lubricating oil 0.003 kW Sub-inch command
B-code I/F
Center height 1050 mm Bar feeder interface
Input power capacity 6 KVA
Air pressure and air flow rate for pneumatic devices 0.5MPa 9 0NL / min ( max. 1 50NL / min) Optional NC functions
Program storage capacity: 120m
Weight 2550 kgs Additional custom macro variables
Catalog No. A20VII 0209
