DPA Air Gap Sensors

NEW!!
±0.5µm Repeatability
AIR GAP SENSORS
Pneumatic Sensors for
Precision Seating Confirmation
DPA Series
IP67
DPA Air Gap Sensors
Short/Long Range Detection
Pneumatic Sensors
for Precision Seating Confirmation
Effectively prevents CNC industrial machined defect products.
±0.5µm− Repeatability,
Detects workpiece floating due to cutting chips.
Conventional
“pneumatic gap sensors”
Air Gap Sensors
NG
Variation
Within in signal point
±20μm
±0.5μm
NG
← Signal set →
position
OK
Signal output point
OK
±0.5μm Repeatability
±20μm Repeatability
・Minimal signal point variation and effective
detection of workpiece floating due to cutting chips.
・Precision seating confirmation can be realized
within the allowable tolerance, preventing
machining defects.
・Large signal variation means only workpiece
existence detection is possible.
・Cutting chips cause the workpiece to float up,
making it impossible to accurately confirm
workpiece and jig seating.
❶
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Air Gap Sensors
IP67
Installation inside machine
IP67 Resistant to coolant
Sensor can be installed inside machine tools.
Shortened air piping improves response speed and
realizes higher productivity.
Tube length
1.5m
Tube length
Harsh environments
with splattering coolant
Conventional
Air Gap Sensors
× “pneumatic gap sensors”
1.5m
(Internal installation)
12m
(External installation)
0.8 seconds
More than 5 seconds
Response speed
One-push Master setting
The signal set point can be configured by
placing a master within allowable tolerance into the jig
and holding the master set button down for one second.
2 types are available:
1−100µm detection distance : Short range detection type
80-350µm detection distance: Long range detection type
Product lineup
NEW!!
Short range detection type
1−100μm
Detection distance
Short range detection
Workpiece
Cutting
chip
Air
Selection by
detection distance
80−350μm
Detection distance
Long range detection
DPA-SR1
→ P. 5
Long range detection type
DPA-LR1
ce
Workpie
Air
Surface
roughness
❷
→ P. 5
DPA-SR1 Applications Short range detection type (1-100µm)
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Ultra-precision machining can be realized by checking
the precise seating of workpiece in jig.
Effectively prevents defect products.
±20μm Repeatability
±0.5μm Repeatability
10μm gap caused by cutting chips
cannot be detected.
10μm gap caused by cutting chips
can be detected reliably.
Pneumatic gap sensor
Precision
component for PC
±20μm Repeatability
Jig
Air Gap Sensor
Precision
component for PC
Short range detection type
±0.5μm Repeatability
Jig
0.05　DPA-SR1
Judgement
possible
Judgement
not possible
10μｍ
Air
10μｍ
Air
Cutting
chip
Air
Cutting
chip
Air
10µm gap caused by cutting chips can be detected reliably.
Achieves ultra-precision machining with CNC lathes.
Cutting chips put between the bar material
and stopper, shifting the processing point.
With ±0.5μm repeatability,
Effectively detects 10μm gap due to cutting chips.
Air Gap Sensor
Stopper
Stopper
10μm Gap
Tool
Bar material
（Supplied with a bar feeder）
Bar
material
Short range detection type
±0.5μm Repeatability
10μm Gap
Stopper
Tool
Bar material
（supplied with a bar feeder）
Cutting chip
Bar
material
Stopper
Air
Cutting chip
❸
DPA-LR1 Applications Long range detection type (80-350µm)
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Effectively detects seating of
die cast component with rough surface.
Shortened air piping improves productivity.
±20μm Repeatability
±0.5μm Repeatability
Rough workpiece surface makes precision
seating detection impossible.
Pneumatic gap sensors
±20μm Repeatability
Rotary
table
350μm detection distance achieves
precision seating confirmation reliably.
Air Gap Sensors
Rotary
table
Long range detection type
±1μm Repeatability
Die-casting engine
Die-casting engine
External
installation
DPA-LR1
IP67
Internal
installation
Judgement
not possible
Tube length :12m
× Response speed：More than
5 seconds.
Surface
roughness
Air
350μｍ
Chuck
350μｍ
Chuck
Judgement
possible
Tube length : 1.5m
Response speed：0.8 seconds
Surface
roughness
Air
High accuracy, non-contact detection of the wear
on rotating grindstones.
Realizes ultra-precision machining with CNC grinder.
±1μm Repeatability
±30µm Repeatability
High accuracy, non-contact detection of
grindstone wear.
Detects wear on grindstones with contact.
Grindstone
Grindstone
Vibration sensor
AE sensor etc...
±30μm Repeatability
1. Low accuracy
2. Wear due to contact
Rotation
CNC grinder
1. ±1µm repeatability
2. No wear on grindstone
Air Gap Sensor
Long range detection type
±1μm Repeatability
Contact
Grindstone
Grindstone
DPA-LR1
Injection needles
Injection needles
❹
Noncontact
Air
150μｍ
Rotation
CNC grinder
Air Gap Sensors
Pneumatic Sensors for Precision Seating Confirmation
DPA-SR1 / LR1
Short / Long range detection
NEW!
→ 1−100μm Short range detection type
DPA-SR1
The gaps caused by cutting chips put between the
workpiece and the jig can be detected reliably with
±0.5µm to ±1µm repeatability.
→ 80－350μm Long range detection type
DPA-LR1
Reliably detects the gaps of 80 to 350μm with
±1µm– ±5μm repeatability.
Best suited for seating confirmation of big workpieces or workpieces with rough surface.
* Photo shows the optional protective tube attached
■Specification
DPA-LR1
DPA-SR1
Product No.
Detection distance
80−350μm (When using a recommended nozzle)
1−100μm (When using a recommended nozzle)
Signal point
Configurable by master set bottun
Repeatability
±1μm：Detection distance 80−150μm
±0.5μm：Detection distance 1−60μm
±3μm：Detection distance 150－250μm
±1μm ：Detection distance 60－100μm
±5μm：Detection distance 250－350μm
Pressure change : within ±1μm
Pressure change : within ±1μm
Tube length 1.5m/When using a recommended nozzle
Tube length 1.5m/When using a recommended nozzle
Response speed
0.8 second (Tube length 1.5m/when using a recommended nozzle)
Protective structure
IP67
Setting pressure
0.15−0.2MPa
Pipe diameter
O.D. φ6 X I.D. φ4 tube
Fluid
Dry air (filtered to 5μm)
Consumption flow rate
24ℓ/min（max）
9ℓ/min（max）
Operating temperature range
0℃−60℃ (no condensation)
Cable
Standard length 3m φ5/4 cores AWG 30
Power supply voltage
DC24V±10％ Current consumption : less than 50mA
Output specification
Photo MOS relay DC30V (max) 100mA (max)
■Circuit diagram
■Air piping diagram
Air lines are to be provided by the user.
Electric circuit
Air filter (5μm mesh)
Recommended air filter : AF20-02 (SMC)
Orange DC24V±10％
Main Circuit
Air inlet
Air
Tube
Precision regulator
Adjust the setting pressure within 0.15-0.2MPa.
Recommended regulator : IR2000 (SMC)
Green
Yellow
（Recommended
diameter : φ6×φ4）
Black 0V
Air circuit
Precaucions for air piping
Set the air pressure less than 0.2MPa.
Connect the air pipe after adjusting the setting pressure within
the range of 0.15-0.2MPa.
Air
❺
NO
Sensor
Sensor
Photo MOS relay
DC 30V（max）
100mA（max）
DPA-SR1/ LR1
Short/ Long range detection
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■External Dimensional Diagram
DPA-SR1：Detection distance
DPA-LR1：Detection distance
Unit：mm
1-100μm
80-350μm
Air pressure alarm LED
Master set bottun
OK/NG LED
95
Resolution set bottun
46
Detected object/Master
Clamping jig
Accesory for DPA-SR1 only
(short range detection type)
Cable
8
14
36
Leakage unit
23
11.7
4-M4 D6
13
5
φ1.5
C0.1～0.2
（slight chamfering）
20
Recommended nozzle
+0.02
0
Rc１/８
Air inlet
Rc１/８
Air nozzle
connection port
35
12.5
25
70
φ4≦
■Options
Product No.
DPA-LR1
DPA-SR1
Cable protection
Tube length
Blank : 3m
Blank : No cable protection
N : Nm（Specify）
WN : Wire braid Nm（Specify）
▲
e.g.) DPA-LR1-5W3
Wire braid for protection
Material : Steel wire, Tight winding
Minimum bending radius : 7mm
Connection
tube size M8 × 1
φ8.2
Tight
winding φ0.5
Switch side is fastened with screws and machine side is
simply cut.
When extension is needed, it is recommended to use a
threaded connection tube.
Handling instruction
1）Since gaps are formed at bend section (especially at the
attachment end) of the wire braid, make sure the instruction of
cuttings does not damage the cable.
2）Be careful not to damage the cable sheath as a result of crushing it
during clamping.
3）When binding it up and clamp with other cables, make sure not to
apply excessive force to the attachement end.
4）Wire braids extend by their own weight. Fabricate wire braids
slightly shorter than the cable length.
❻
DPA
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Precision mechanical type
Air Gap Sensor
for short range detection
DPA-A2
Product No.
DPA-A2
Repeatability
±1μm*
Response speed
0.8 seconds*
Protective structure
IP67
Detection distance
2−80μm（10μm at the factory setting）
Setting pressure
Set with the signal point tab
0.1MPa
*Tube1.5m / When using a recommended nozzle
For more detail, prease contact us.
Help Desk
We accept inquiry regarding sensor selection,
exclusive specification, and technical matter
through website, e-mail, fax, and Tel.
+81-50-5558-7366
+81-42-528-1442
e-mail
touchsensor@metrol.co.jp
www.metrol.co.jp/en
◎The specifications and descriptions are subject to change without notice due to improvements in products.
METROL CO., LTD. www.metrol.co.jp/en
1-100 Takamatsu-cho Tachikawa, Tokyo 190-0011 JAPAN
TEL: +81 50 5558 7366 / FAX: +81 42 828 1442
❼
DPASRLR-E-K001