METROL specialize in manufacturing Tool Setters & Precision Positioning Switches

Ultra precision position Swhitches  Metrol

Air Gap Sensors[DPA-SR/LR]

±0.5μm Repeatability

Not “Existence detection”,
but “Precision seating confirmation.”
The new standard for pneumatic “Gap Sensors.”

Effectively prevent CNC industrial machined defect products by detecting workpiece floating due to cutting chips.

Reasons to choose Metrol’s Air Gap Sensors

±0.5μm− Repeatability

Minimal signal point variation and effective detection of workpiece floating due to cutting chips.

Accurate seating confirmation can be conducted within the allowable tolerance, preventing machining defects.

IP67 Protective structure

Sensor can be installed inside machine tools.

Shortened air piping improves response speed and realizes higher productivity.

One-push master setting

The signal set point can be configured by placing a master within allowable tolerance into the jig and keep pressing the master set button down for one second.

There is a self-diagnosis function.
Alarm signal is output and LED flashes when the air pressure is outside appropriate measurement pressure range.

2 Signal Point Setting Type
Available Now!

3 classifications (-NG, OK, +NG) by setting upper and lower limit points.

Realize precision inner diameter measurement at low cost!

Machine can be automated by externally outputting measurement signal.

Case studies

Metrol VS Competitor

Metrol’s
Air Gap Sensor
Air sensors / Gap sensors
made by another companies
Repeatability
±0.5μm−

±20μm−
Workpiece “Precision seating confirmation”
can be realized.


Minimal signal point variation and effective detection of workpiece floating due to cutting entrance.

Accurate seating confirmation can be conducted within the allowable tolerance,
preventing machining defects.
Only workpirce “Existence detection” possible

Large signal variation means
only workpiece existence detection is possible.

It is impossible to detect workpiece floating due to cutting chips and to accurately confirm
workpiece and jig seating.
Detection distance
1−350μm

40−250μm
Protective structure
IP67
(Can be used under harsh environment
where coolant splatter)

IP66
(Not suited in harsh environment)
Response speed
About 0.8 seconds ( Tube length: 1.5m)

Air piping can be shortened
by installing sensor inside machine tools.

About 5 seconds (Tube length: 12m)

Longer air piping is necessary because sensor shoud be installed outside machine tools
Numeral display
No display (only ON/OFF signal)*

With display

*The signal point can be configured by pressing the master set button.

Product list

  Product No. Detection range Signal point setting Download
DPA-SR1
1−100μm
Short range detection type
1 signal point setting type
Catalog
(PDF)

Manual
(PDF)

CAD
(DXF)
NEW!!
DPA-SR2
2 signal point setting type

3 classifications
(-NG, OK, +NG)

Manual
(PDF)

CAD
(DXF)
DPA-LR1
80−350μm
Long range detection type
1 signal point setting type
Manual
(PDF)

CAD
(DXF)
NEW!!
DPA-LR2
2 signal point setting type

3 classifications
(-NG, OK, +NG)

Manual
(PDF)

CAD
(DXF)

Electrical guide Options / Precautions

Specification

Product No. DPA-SR1 DPA-SR2 DPA-LR1 DPA-LR2
Detection range 1−100μm* 80−350μm*
Repeatability ±0.5μm:Detection range 1−60μm
±1μm :Detection range 60−100μm


Air pressure change within ±1%*
±1μm:Detection range 80−150μm
±3μm:Detection range 150−250μm
±5μm:Detection range 250−350μm

Air pressure change within ±1%*
Response speed 0.8 seconds *
Electrical response speed 80ms 10ms 80ms 10ms
Protective structure IP67
Setting pressure 0.15−0.2MPa
Operating temperature range 0℃−60℃(no condensation)

*Tube length 1.5m / when using a recommended nozzle

Case studies of DENSO Corporation

Prevent machining defects with CNC machine tools using precise workpiece seating confirmation.


DENSO’s Driving Safety Production Division manufactures ABS actuator parts that are vital components for safety of automobile.
There was a trouble with defective products due to seating failures of workpieces in cutting by CNC machining center. The biggest headache was having to stop the line for a full inspection.

Applications

Adhesion confirmation in machining the engine

±0.5µm high accuracy can realize precisely cutting and machining the engine.

Adhesion confirmation of shank

Precision machining can be realized by detecting 10µm gap caused by cutting chips.

Adhesion confirmation in machining tire molds

A 10μm uplift by the cutting chips can be detected by the improvement of the machining accuracy.

Seating confirmation of workpiece with rough surfaces

Effectively detects seating of die-casting components with 350µm detection distance.

Adhesion confirmation to mold pressed by oil pressure

A 10μm of foreign materials is stably detected in gaps between the cope and drag.

Detecting the machining origin of CNC lathe

Prevent defective products by detecting CNC lathe processing point misalignment.

Technical Catalog Download

Want to know more about “Air Gap Sensors”? Our catalog provides you with deteiled technical data such as specification, size and circuit diagram.

Download and get your free catalog!

Awarded an “excellence prize” in “Tokyo venture Technology Award 2015″

One of Metrol new products won an "Excellence award" in "Tokyo venture Technology Award 2015"!"Air Micro Switch", a…

Posted by Metrol Tool Setter (for CNC Machine) on 2015年12月23日

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