Air Gap Sensor [DPA-SR1/LR1 Series]

Air Gap Sensor [1-point setting type] DPA-SR1 / LR1 Series

Pneumatic precision seating sensor to prevent machining defects on CNC machine tools.

Covers everything from "presence/absence detection" to “high-precision seat confirmation.”
±0.5µm repeatability. Detects workpiece floating due to cutting chips, preventing defective products at the manufacturing stage.
Pneumatic precision seating sensor to prevent machining defects on CNC machine tools.

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Main Challenges

  • Eliminate machining defects caused by chip entrapment.
  • No need for presence or absence checking of a workpiece, but to check for adhesion between the jig and the workpiece in a precise manner.
  • Eliminate machine downtime due to false detection and increase productivity.
  • Eliminate machining defects caused by chips being caught in the workpiece when it is seated.

Features

Repetition accuracy of ±0.5μm prevents any false readings

Repetition accuracy of ±0.5μm prevents any false readings

Gaps of “20 μm or less”, which cannot be detected by conventional gap sensors, are accurately detected with a repeatability of ±0.5 μm.

Reduces machining cycle time

Reduces machining cycle time

IP67 rating for protection against water, coolant, and dust, and the sensor can be installed inside the machine for shorter air piping.
Shorter pipe length improves signal response and contributes to shorter cycle time in mass production lines.
Coolant flooding tests and severe durability tests are conducted on machine tools assuming that they will be used in adverse environments.

Simple operation

Simple operation

Threshold Setting” is completed with a single push.
Simply place the master workpiece or shim between the seating surface and the workpiece and press the master set button to complete setting.
Anyone can easily set the threshold value, thus eliminating variation in setting values among different operators.

Supply air self-diagnostic function

The self-diagnostic function outputs an alarm when an error occurs in the air supply pressure.
It notifies you of insufficient pressure, pressure fluctuation while the sensor is in use, and excessive pressure.

[Robot × Air Gap Sensor]
Workpiece seating check by an universal robot

[Robot × Air Gap Sensor]
Workpiece seating check by an universal robot

[Robot × Air Gap Sensor]
Workpiece seating check

Detection of the shank floating

Detection of the engine part floating during cutting

[Case Study]
DENSO Corporation / Air Gap Sensor

Specification


Product name DPA-SR1 DPA-LR1
Poupose of use Seating confirmation of workpieces or workpieces with rough surface
Signal points can be set 1 point
Hot to set the detection range Configurable by master set bottun
*The signal point values are saved even when the power is turned off.
Detection range
 1 - 100μm （When using a recommended nozzle) 80 - 350μm （When using a recommended nozzle)
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％
Protective structure IP67
Output mode NO（Normally Open）
Fluid Dry air（filtered to 5μm）
Setting pressure 150 - 200kPa
Consumption flow rate 9ℓ/min (max) 24ℓ/min (max)
Connection port diameter Rc1/8
Recommended tube: SUP port φ6×φ4 tube
Recommended tube: OUT port φ4×φ2.5 tube
φ6×φ4 tube
*A diameter of the connection tube for leakage unit (accessory) is φ6. Please prepare a conversion adapter if you use a connection tube of φ4.
Response speed 0.8 seconds
(Tube length 1.5m / Time between the air pressure supply and the signal output of the sensor.)
Input specification ー
Output specification Photo MOS output
Rated voltage：DC30V (Max)
Rated current：100mA (Max)
Cable Standard length 3m　Oil resistance φ5 / 4 sores AWG30
Electrical response speed 80ms
LED lump See manual
Accessory Leakage unit x1 o
Operating temperature range 0℃ - 60℃（no condensation）

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