Linear Motor Drive - Methods Machine Tools

Higher accuracy produces greater profitability
Linear Motor Drive
New technologies for micro high speed machining targeting sub-micron accuracy
Reliable spindle and construction to avoid thermal distortion
The best solution for future demands for a more sophisticated and diversified
machining process
YASDA Micro Center YMC430 is a state-of-the-art
high-end machine, which fits the rapidly
increasing demands for ultra-precision and high
surface quality milling in the fields of medical
equipment parts, IT related parts, high precision
miniature die and mold etc, where the
technologies are constantly advancing.
All controlled axes (X, Y and Z) driven by highspeed linear motors, highly rigid symmetric frame
design and a unique thermal distortion stabilizing
system which sustains machining accuracy in long
cycle time operation, will assure unsurpassed high
accuracy and excellent motion performance in
various applications. YMC430 provides the best
solution for future demands for ultra-precision and
high surface quality machining.
1 YASDA MICRO CENTER YMC430 Linear Motor Drive
YMC430 - Unsurpassed speed and quality
（X, Y and Z）and a highly rigid body provide
Linear motor driven controlled axes
the highest in its class, for speed, precision, and surface quality machining
Significant reduction in machining time
In comparison with a conventional machining center using ball screws, YMC430 using linear motors provides
significant machining time reductions even in the same machining program.
Work piece examples
With the controlled axes driven by linear motors and the highly rigid machine construction, YMC430 realizes
smooth motion and unparalleled machining accuracy and surface quality in machining very small work
pieces, which need fine motion control.YMC430 is also ideal for machining hardened material.
1
Filter mold
Gear mold
Hydro dynamic bearing punch
Electrode for insert chip
Reflector form
Gear punch
YASDA MICRO CENTER
YMC430
Linear Motor Drive
Construction of YMC430
Symmetrical frame design leads to high rigidity
High rigidity from the H-shaped solid column four direction symmetry and lower center
of gravity design for maximum stability
Symmetrical H-shaped column
Highly rigid frame design is the icon of YASDA
precision centers. YMC430 employs innovative
H-shaped column analogous to a double
column design.
This design increases flexural and torsional
rigidities shortening the line of force from
spindle to table.
The spindle head is positioned in the centre of
the columns so that the entire body forms a
highly rigid Z-axis frame.
Symmetrical and cylindrical spindle head
The spindle head employs a cylindrical form,
which is symmetric in cross and horizontal
directions. The influence of thermal
deformation in the X and Y-axis directions is
minimized maintaining mechanical rigidity.
Synchronized with the machine temperature
cooled oil is circulated in the spindle head.
This system sustains high precision machining
over a long period.
The center of the spindle is
maintained even during
thermal expansion.
X - Y table
The moving light-weight body is positioned in the center of
the bed with a lower center of gravity so as to minimize
vibration arising from the reaction force in high-speed feeding.
Bed
This arrangement also supports high precision machining and
The sides of the bed are raised allowing a larger thickness
the lower position of the table surface allows a more
with an integrated design with the column to further ensure
comfortable work setting position.
high rigidity.
High-speed, stability and high class machining
backed by original design technology
This original column design is stable in temperature change never allowing attenuation
on the line of force, the key to high-precision machining
In case of the standard single column and C-shaped frame construction, the long overhang from the front side of the
column to the spindle is difficult to achieve sufficient rigidity. Also disposition in Y and Z-axis direction attributing from
asymmetric shape in the front-back direction is an unavoidable weak point.
YMC430 employs an analogous shape to a double column, so called H-shaped column having parallel lines of force
due to its characteristics. This symmetric design efficiently stabilizes thermal changes in four directions. This design
successfully achieves both stable machining accuracy and high rigidity at the same time.
The line of force of column
General
YMC430 with symmetric
C-shaped frame
H-shaped column
・Long overhang
・Analogous construction
to a double column
Force flow
Force flow
Positioning accuracy（Actual
value
） ISO 230-2（1997）
（X-Y axes）
Motion performance data
Roundness 0.60
Y
X
Z
（Actual value）
A : Accuracy
0.356
μm
0.508
μm
0.316
μm
90
°
μm
X-axis two directional positioning accuracy
and repeatability
1
0.8
0.6
180
°
0
°
0.4
0.2
0.0
- 0.2
- 0.4
Error
（μm）
- 0.6
- 0.8
-1
0.0
50
100
150
200
250
300
350
400
Machine position
（mm）
270
°
2
The smooth guides that enable 1/10,000mm step of
ultra-precise movement
YasdaÕs high-precision assembling technology and the linear motor drive provide
the ultra-precise movement
Ultra-precision linear guides
YMC430 employs ultra-precision linear guides, which
reduces the problem arising from waving. Together
with the high-precision assembling technology and
linear motor drive, the highest straightness and
smoothness in axis movements are achieved.
Straightness（Measured
data）
X
Y
Z
Horizontal direction
0.448μm
0.220μm
0.373μm
Vertical direction
0.124μm
0.088μm
0.464μm
*Measured with a 100mm optical flat
X-axis straightness in vertical direction
0.124μm / 100mm
3
2
1
Displacement（μm）
0
-1
-2
-3
0
10
20
30
Y-axis straightness in vertical direction
40
50
60
70
80
90
Travel distance（mm）
60
70
80
90
Travel distance（mm）
0.088μm / 100mm
3
2
1
Displacement（μm）
3
0
-1
-2
-3
0
10
YASDA MICRO CENTER
20
YMC430
30
Linear Motor Drive
40
50
Spindle Ð The key to high accuracy and high surface quality
Irrespective of the type of tool or rotation speed, YASDA'S spindle realizes
unsurpassed precision machining for long periods
High stability
Large capacity
The 40,000 min-1 spindle, which
was developed to target low
vibration and high reliability, is
precisely assembled in order to
realize constant high precision
machining for long periods.
Even with a bigger diameter tool
for the spindle taper HSK-E32,
YMC430 can easily generate high
cutting performance.
（Example）
φ12mm square end mill
S1600min-1, F320mm/min.
Ad0.5mm, Rd12mm
Material: NAK80（HRC40）
Verification of high precision machining
1. Prepare a work piece with 2μm step as described below.
2. Set 6 different tools in the automatic tool changer.
3. After changing each tool by automatic tool changer, set the
tool positions at 1μm above the datum（0 level）using a tool
length and diameter sensor. At this Z position（+1μm
position）, cut toward left（+2μm level）.
Each tool is purposely set with a different cutting condition.
<Procedure>
Milling order
φ
（
10,000min
φ
（
30,000min
6mm
-1
Square
1mm
-1
（
0.2mm
（
R3mm
μ
2
m
Material: A5052
+4
+2
）
end
mill
φ
difference
）
-1
40,000min
-1
10,000min
）
）
Ball
0
Milling from
-2
（
R0.5mm
μ
1
-4
-1
30,000min
）
m above
end
mill
0 level
Cutter marks were only apparent on the +2 μm level, none of
the tools left a cutter mark on the 0 level.
According to the result, YMC430 verified milling performance
within 1μm tolerance irrespective of type of cutter and
rotation speed.
（
R0.1mm
-1
40,000min
）
<Result>
*Key point of verification
+4 +2
0 -2
-4
（μm）
If the Z-axis positioning is not
accurate enough, cutter marks
will appear on the 0 level or +2μm
may not be milled.
4
Advanced technology for thermal stability
Thermal distortion stabilizing system for stable high-precision machining
YMC430Õs thermal distortion stabilizing system
By circulating temperature-controlled oil through the
inside of the column, the spindle head, X-Y table etc,
YMC430 regulates thermal disposition in each axis
Cooling of Z-axis linear motor
leading to stable high-precision machining.
Also the column due to its symmetrical H-shaped
design in four directions regulates its distortion
following thermal change.
Cooling of Z-axis base
Cooling of spindle head
Cooling of column
Cooling of
Y-axis linear motor
Cooling of
X-axis linear motor
Oil pan
An additional oil pan completely covers
the bed surface in order to prevent heat
generating objects such as coolant and
cutting chips from coming into contact
directly with the bed surface. This
meticulous thermal distortion measures
enables stable high precision machining
over a long period of operation.
5
YASDA MICRO CENTER
YMC430
Linear Motor Drive
Details of YasdaÕs machine option design developments
Highly reliable automatic tool changer is equipped as standard Vibrations from auxiliary
units, hydraulic devices etc are under control
Armless type automatic tool changing unit
The tool magazine moves towards the spindle allowing the tool to be
changed without an arm. This simple design allows small mechanical
movements and makes it a very reliable system.
Compact 90-tool tool changer
（Option）
The large capacity compact 90-tool
tool changer is available as a factory
installed option. The matrix type
magazine fits the standard tool
changing unit space. This is possible to
set up without expanding the
installation area.
Separation of auxiliary units
Devices such as the pumps, the control unit, etc. are the sources of
vibration and heat. These devices are consolidated into one unit and set
up on the rear of the machine. After installation, this unit is mechanically
disconnected from the machine so that vibration to the machine is
insulated.
Hydraulic device
Actuation by the hydraulic device is eliminated as much as possible and
the device itself is downsized. The hydraulic device is actuated only
when necessary and start-up is instant. Hydraulic pulsation is not
transmitted to the machine through pipes, etc. so that the machining
1700
1700
750
2295
520
Space for
maintenance
140
unit:mm
2670
OUTLINE
800
surface is kept intact.
Thermal distortion
stabilizing system
352
2290
750
520
1700
750
2290
750
6
SPECIFICATIONS
1. Specifications of base machine
1
）Travel
（Cross movement of table）
400mm
（Longitudinal movement of table）
300mm
Z-axis travel
（Vertical movement of spindle head）
250mm
Distance from table surface to spindle nose face
150
Spindle speed range
200
Spindle drive motor
AC7.5kW
Spindle taper
HSK - E32
Table working surface
450mm
Table loading capacity
100kg
Table surface configuration
3T-slots, width 14mm H7, pitch 100mm
Rapid traverse rate
20,000mm/min
Cutting feed rate
Max.10,000mm/min
Least input increment
0.0001mm
Tool shank type
HSK-E32
Tool storage capacity
32
Maximum tool diameter / length / mass
φ50mm /120mm /500g
X-axis travel
Y-axis travel
2
3
4
5
）Spindle
）Table
）Feed rate
）Automatic tool changer
∼400mm
∼40,000min-１
（Continuous）
× 350mm
6
）Mass of Machine
Approx. 8,000kg
7
）Electric power requirement
26kVA
8
）CNC unit
FANUC 31i - A5
2. Standard equipment
3. CNC standard options
X, Y and Z axes 0.0001mm resolution
1
）Least input/travel increment
0.0001mm
1 flood nozzle, standard tank capacity 110L
2
）Display
10.4" color LCD
Manual door with roof, with one fluorescent lamp
3
）Program storage length
320m
4
）Custom macro
Common variable :100
5
）Number of registerable programs
250
6
）Automatic corner override
7
）Tool offset pairs
64 pairs
8
）Tool offset memory
C memory
9
）Run hour and parts count display
1
）Optical scale feed back
2
）Cutting oil unit（AA type）
3
）Splash guard
4
）Thermal displacement compensation for Spindle
Standard data
10
）Extended part program editing
（128KB）
S P E C I F I C A T I O N S（ Optional ）
1. Optional equipment
（2 min.）, Max.50,000min-１
1）
High-speed spindle
（HSK-E25）
AC10kW
2）
Number of stored tools addition
Total: 90
3）
Signal tower（Multilayer signal lamp ）
Red, yellow, green
（Flashing）
4）
Cutting fluid temperature control unit
5）
External mist coolant
Manufactured by Bluebe/1 nozzle
6）
Oil skimmer
Oil Pure type
7）
Washing gun
One place
8）
Mist collector
1 unit
9）
Automatic tool length compensation and tool breakage sensor
Manufactured by BLUM/NT-H type
10 ）
Tool length/radius compensation and tool breakage sensor
Manufactured by BIG Daishowa / Dyna Vision Pro
11 ）
Automatic measuring system
Manufactured by Renishaw / Touch probe OMP400
12 ）
High-speed machining function（YASDA HAS-3 system ）
Maximum feed rate 10,000mm/min
13 ）
Thermal distortion stabilizing system
With weekly timer
（Operator position）
（Touch and laser）
14 ）
Weekly timer
15 ）
Thermal displacement compensation for spindle
Individual data
16 ）
AWC door
17 ）
Robot interface
Compatible with System 3R and EROWA
2. CNC Options
1）
Part program storage
Total:256KB, 512KB, 1MB, 2MB, 4MB, 8MB
2）
Extensional number of registerable programs
Total: 250, 500, 1,000, 2,000, 4,000
3）
Background editing
4）
Helical interpolation
G02, G03
5）
Conical / spiral interpolation
G02, G03
6）
Inch / Metric conversion
G20, G21
7）
Scaling
G50, G51
8）
Coordinate rotation
G68, G69
9）
Programmable mirror image
G50.1, G51.1
10）
Rigid tap
M29 (G84, G74)
11）
Optional block skip
Total: 9
12）
Tool offset pairs
Total: 99, 200, 400, 400, 999 sets
13）
Custom macro common variable
Total: 600
14）
Addition of work piece coordinate
48, 300 sets
（Helical interpolation is required）
15）
Tool management
16）
Normal direction control
G40.1, G41.1, G42.1
17）
Cs contouring control
18）
Smooth TCP
G43.4, G43.5
19）
Tilted working plane command with guidance
G68.2, G69, G53.1
20）
Work setting error compensation
G54.4 Pn
21）
Ethernet function
FOCAS2 / Ethernet
22）
Data server function
Fast data server, Capacity 1GB
Catalog No.YMC430 SPC0902-E
Printed in Japan 11122009
YASDA PRECISION TOOLS K.K.
www.yasda.co.jp
Main Office&Factory:
1160Hamanaka,Satosho-cho,Okayama,719-0303,Japan
PHONE:+81/865-64-2511 FAX:+81/865-64-4535
Representative Office:
Fritz-Vomfelde Strasse 34,D-40547 DŸsseldorf,Germany
PHONE:+49/211-53883-218,-216 FAX:+49/211-53883-174
YASDA PRECISION AMERICA CORPORATION
62 North Lively Boulevard Elk Grove Village,IL60007 U.S.A.
PHONE:+1/847-439-0201 FAX:+1/847-439-0260
YASDA PRECISION TOOLS(SHANGHAI) K.K.
Rm.1001 Orient International Plaza Part(C),
No.85 Lou Shan Guan Rd,Shanghai,China
PHONE:86-21-62700955 FAX:86-21-62700970
Export of the products and associated software, and related services are subject to prior approval of
the Japanese government according to ÒForeign Exchange and Foreign Trade LawÓ.
＊
Catalog No.YMC430 0901-E
Printed in Japan 15092009