Touch Probe for CNC Cylindrical Grinders [E2A Series]

Touch Probe for CNC Cylindrical Grinders E2A Series

End face measurement of workpieces and grinding wheels on CNC grinding machines

The E2A series is mounted on a cylindrical grinder to measure the end face of a workpiece. The rectangular flat surface of the sensor allows easy adjustment for mounting.
Also, this sensor is equipped with an overtravel (OT) signal output function to prevent failure due to over-pressurization or collision of the sensor.

Detecting Direction: ±X 2-Direction Type

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Features

２μm repeatability, durability of 3 million cycles

Operates at the moment the touch-probe contacts the workpiece, enabling highly precise position detection.

No directional variation

By limiting the detection direction to two, differences in sensitivity (directional characteristics) are minimized, and detection differences in the ±X direction are minimized, enabling highly precise detection.

Waterproof and oilproof construction with IP67 rating: Resistant to Water and Liquids

Applicable for use in adverse environments with splashing water, oil, coolant, and chips.

Resistant to vibration due to pre-travel (PT)*

(*Pre-travel: the amount of movement from the time the touch-probe contacts the work to the time the output switches)

Overtravel signal output available

Fully equipped with an overtravel (OT) signal output function to prevent malfunctions due to over-pressurization or collision of the sensor.

Wide variety of optional items

Stylus, mounting method, cord length, and other options can be selected.

Principle Structure

By placing the touch-probe on the stylus tip against the workpiece or table, a high-precision ON/OFF signal is output, which can be input to NC/PC equipment.

Built-in high-precision, high-durability touch switch is activated by stylus movement.

False signals and chattering due to vibration and shock do not occur.
Touch-probes are made of low-electrical resistance material for long life.
There is no change in contact force based on the direction of detection.
It supports both NC and NO (Open and Closed) contact structures.
Pre-travel and homing errors do not affect repeatability.

Main Specifications

Product Category	Wired touch-probe
Applications	CNC cylindrical grinders
Purpose of use	Measurement of workpiece end surfaces
Direction	±X 2 direction
Repeatability	0.002mm (Recommended operating speed of 50 - 200mm/min)
Protective structure	IP67
Contact life time	3 million
Pretravel	Less than 0.5mm
Stroke	±7mm（Approx. 5°） *with stylus 1025D
Contact Force	X=1.2N
Stylus material	Tungsten carbide ball
Cable	Oil resistant φ5 / 4 cores 　 Tensile strength 30N, Minimum bending R7
LED lump	Default : LED ON Operating : LED OFF
Contact structure	NC (Normally closed)
Output mode	NC (Normally closed) or NO (Normally opened)
I/F unit	Build-in
Contact rating	DC5V - DC24V　 Steady Current: 10mA or less / Rush Current: 20mA or less *Limit the LED forward current below 10mA.
Operating temperature range	0 - 60℃　(Ice free)（CL-1F operating temperature range：0 - 50℃）
(Over travel signal) Output mode	NC (Normally closed)
(Over travel signal) Contact rating	DC24V 20mA(MAX)

Circuit Diagram

Notes

If grinding dust deposits on the surface of the rubber boot, flush it with coolant or clean and remove it.
Intended coolant used is water-soluble coolant (alkaline).
Do not use at an operating speed of 10 mm/min or less.

Options

Customization

The blue line part can be customized. Please refer to our brochure for details.

Standard Model

*This is the part number of the standard specification of the E2A series.
If you have not determined any specific specifications, please contact us about the following part number.

Product No.	Direction of detection	Contact force	Repeatability	Protective structure	Contact life time	CAD
E2A-ST1	±X 2-deirection	X=1.2N	0.002mm	IP67	3 million	CAD(DXF)