User Manual

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GT2-70-M-E

High-accuracy Digital Contact Sensor

GT2-70

Series Instruction Manual

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Symbols

The following symbols alert you to matters concerning the prevention of

human injury and product damage. Be sure to read these messages carefully.

Safety Information for GT2-70 Series

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Other precautions

●

Effects of surrounding air temperature

To use the GT2-70 Series with high accuracy, do not use the GT2-70 Series in

an environment in which the surrounding air temperature changes sharply.

It will take about 40 minutes for the 12 mm type, and 60 minutes for the 32 mm/50 mm type for

the internal temperature to stabilize when the surrounding air temperature has changed by 10°C.

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Warming up

The circuit is not stable immediately after the power turns ON, which

sometimes causes the indicated value to gradually fluctuate. Wait for about

5 minutes when using the 12 mm type and about 10 minutes when using

the 32/50 mm type after the power turns on before starting operation.

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GT2-PA12K/PA12 (See illustration 1 for the pneumatic circuit)

•

This model uses a single-acting cylinder. The internal spring will

return the sensor head to its home position.

•

The air supply hole cannot be removed.

•

Use an air filter, mist separator, etc. to provide clean dry air. Empty the

drainage from the filter regularly, before it exceeds the specified line.

•

Before connecting the air tube to the air supply hole, be sure to blow

plenty of air through the pipes (flushing) to remove any foreign matter.

•

Make sure that the air pressure of the supplied air is constant and in the range

of 0.24 to 0.26 MPa. Use a precision regulator to control the air pressure. If

the air pressure is below 0.24 MPa, the spindle may not extend fully.

•

When supplying air (with the spindle extended), up to 3L/min of air

will be emitted from the tip of the dust seal.

•

The measuring ability of the device changes according to the air pressure

of the air supply. Refer to "Specifications" (page 14) for details.

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GT2-A12K(L)/A12(L)/A32/A50 (See illustration 1 for the pneumatic circuit)

•

This model uses a single-acting cylinder. The internal spring will return the sensor head to

its home position when air pressure is removed. DO NOT supply air to the exhaust valve.

•

The air cylinder cannot be removed.

•

Use the regulator to supply the stable air pressure to the sensor head.

•

Use the air filter and mist separators to supply dry air. Empty the

drainage from the filter regularly, before it exceeds the specified line.

•

Make sure that the air pressure of the supplied air is constant and

in the range of 0.25 MPa to 0.5 MPa.

•

The coupling socket and the exhaust valve that are supplied with the

air cylinder are dedicated for this product. They cannot be removed.

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Power supply

•

Noise superimposed on the power supply may cause malfunction. Be sure to

use the DC stabilized power supply provided with an insulation transformer.

•

In the case of a commercially available switching regulator, be sure to

ground the frame ground terminal or the ground terminal.

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About dust boot

When the dust boot of the sensor head is damaged, use an optional dust boot sold

separately (For GT2-P12K(F)/P12(F)/H12K(F)/H12(F)/A12K/A12: OP-84332 (Material: NBR

(attached when shipped)). For GT2-P12K(F)/P12(F): OP-87859 (Material: Fluororubber).

For GT2-H32/A32: OP-84459 (Material: NBR (attached when shipped)). For GT2-

H50/A50 (Material: NBR (attached when shipped)).) Attach the dust boot correctly.

The dust boot may deteriorate, depending on the environment it is

used in. In this case, replace the dust boot regularly.

* Do not use the dust boot on the GT2-P12KL/P12L/PA12K/PA12/H12KL(F)/H12L(F)/H32L.

Precautions on Regulations and Standards

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CE Marking

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EMC Directive (2004/108/EC)

•

Applicable standard EMI: EN61326-1, Class A

EMS: EN61326-1

•

This product is designed for use in industrial environments.

Remarks

：

This specification does not give any guarantee that the end-product

with this product incorporated complies with the essential requirements of

EMC Directive. The manufacturer of the end-product is solely responsible for

the compliance on the end-product itself according to EMC Directive.

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UL Certificate

UL File No. E120439 (Category: NRNT2/NRNT8)

•

Use the power supply with Class 2 output defined in NFPA70

(NEC: National Electrical Code).

•

GT2 series are evaluated as open type devices. These products

can not be a part of an enclosure.

WARNING

It indicates a hazardous situation which, if not avoided,

could result in death or serious injury.

NOTICE

It indicates a situation which, if not avoided, could result in

product damage as well as property damage.

WARNING

If the following conditions are encountered, immediately turn

OFF the power. Continuing to use the GT2-70 Series under

these abnormal conditions may cause equipment failure.

• When water or foreign matter enters the controller

• When the GT2-70 Series is dropped or the housing is damaged

• When the GT2-70 Series produces smoke or an abnormal smell

WARNING

• Do not use the GT2-70 Series with a voltage other than

specified voltage, as this may cause fire, electric shock

or equipment failure.

• Do not disassemble or modify the GT2-70 Series. This

may cause fire or electric shock.

• Do not use this product for the purpose to protect a

human body or a part of human body.

• This product is not intended for use as explosion-proof

product. Do not use this product in a hazardous location

and/or potentially explosive atmosphere.

NOTICE

• Be sure to turn OFF the power of the GT2-70 Series and any

connected devices before connecting or disconnecting the

cables. Otherwise, there may be a risk of damage.

• Do not turn OFF the power while setting parameters.

Otherwise, the settings may be partially or completely lost.

• At startup and during operation, be sure to monitor the

function performance of the GT2-70 Series.

• Do not modify the GT2-70 Series or use it in any way

other than described in the specifications.

• The function performance of products used or modified

in this way cannot be guaranteed.

• When the GT2-70 Series is used in combination with other

instruments, function performance may be degraded,

depending on operating conditions and the surrounding

environment. Use the GT2-70 Series after fully studying

the effect of combined use with other instruments.

• Do not expose the GT2-70 Series and peripheral devices

to sudden temperature change. This may cause

condensation, damaging the equipment.

●

Environmental conditions

To use the GT2-70 Series properly and safely, do not

install the GT2-70 Series in the following locations. Use

of this equipment in an improper environment may

cause equipment failure.

•

Locations outside

•

Locations with high humidity, a large amount of dust,

or poor ventilation

•

Locations where the temperature rises excessively

due to direct sunlight, etc.

•

Locations near corrosive or flammable gas

•

Locations where the GT2-70 Series is directly

subjected to vibration or impact

•

Locations where water, oil or chemicals may come

into contact with the GT2-70 Series

•

Locations where static electricity may easily occur

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Noise countermeasures

Installation near a source of electrical noise such as a

power source or a power cable may cause malfunction

or failure of the equipment. Adopt appropriate

countermeasures against noise by using a noise filter

or wiring cables in separate ducts, attaching insulation

to the amplifier or the sensor head, etc.

NOTICE

●

Handling of the sensor head

•

The GT2-70 Series and peripheral devices are precision

machines. Do not drop, or cause any other impact to these

devices. Doing so may cause damage or malfunction.

•

Do not apply weight greater than what is listed below to the spindle.

Do not apply rotational torque. Otherwise the spindle may break.

•

The GT2-P12KL(F)/P12L(F)/PA12K/PA12 spindle can rotate a

maximum of about 4.5°. When using an offset contact (OP-

77683) or similar, if pressure in the rotational direction is

applied to the contact, the measurement position may change.

•

Although the GT2-PA12K/PA12/H12K/H12KF/H12/H12F/

H32/H50/A12K/A12/A32/A50 has a protection rating of

IP67, avoid using it immersed in water or in places where

liquid such as oil may come into contact with it.

•

Although the GT2-P12K(F)/P12(F) has a protection rating of

IP67G/NEMA Type 13, some types of oil may damage the device.

•

If dust, metal powder, or similar becomes attached to the sliding part

of the sensor head, mechanical responses may become slow. If this

happens, replace the dust seal with a replacement dust seal (OP-

87932). Refer to the instruction manual included with the replacement

dust seal (OP-87932) for instructions on how to replace the dust seal.

30 N 100 N

1 N

Mist separator

Air filter

Pressure

source

AIR

Solenoid

valve

Precision regulator

Air supply part

Speed

controllerIllustration 1 - Pneumatic circuit

96M12752

Summary of content (16 pages)

PAGE 1
● Handling of the sensor head 96M12752 • The GT2-70 Series and peripheral devices are precision • High-accuracy Digital Contact Sensor • GT2-70 Series Instruction Manual • NOTICE • • machines. Do not drop, or cause any other impact to these devices. Doing so may cause damage or malfunction. Do not apply weight greater than what is listed below to the spindle. Do not apply rotational torque. Otherwise the spindle may break. The GT2-P12KL(F)/P12L(F)/PA12K/PA12 spindle can rotate a maximum of about 4.
PAGE 2
● Sensor head connection cable Package Contents GT2-CH2M/5M/10M/20M GT2-CHL2M/5M/10M/20M GT2-CHP2M/5M/10M (M8 straight connector) (M8 L-shaped connector) (M8 oil-resistant straight connector) The product package of each model should include the following items. Check that all items are included before use.
PAGE 3
● Panel mount type (Main unit) ■ Wiring of amplifier This section describes how to mount the panel mount type: GT2-75N/75P (Main unit). 1 NOTICE Insulate unused I/O wires individually. ● How to connect the power cable to the DIN-mount quick disconnect type Create a panel opening for mounting referring to the dimensions below. Quick disconnect type amplifiers must be connected with the power cable (I/O cable) GT2-CA2M/CA10M (sold separately).
PAGE 4
● For units other than GT2-P***/PA*** Connecting and Mounting the Sensor Head 1 ■ Names of parts of the sensor head ● GT2-P12K(L)/P12(L) ● GT2-P12KF/P12F ● GT2-PA12K/PA12 Relay connector Operation indicator Cable between the sensor head and relay connector Cable connector Operation indicator Mounting fixture 2 Cable Cable between connector the sensor head and relay connector Secure the connector by rotating the grooved portion.
PAGE 5
1 3 Cut the jig to create a sensor head mounting hole referring to the illustration below. ● GT2-P12K(L)/P12(L)/PA12K/PA12/ ● GT2-H32(L)/H50/A32/A50 H12K(L)/H12(L)/A1K2(L)/A12(L) ±1° 45° Tightening sleeve insertion side 1 8 0G * 27 ) +0.0 05 ( +0.0 φ1 φ0.025 A 0.5 to 1.0*2 ±1° 45° A Nut mounting side 5.5 to 11.3*2 .1 6 +00.00 + A Nut mounting side 5.5 to 11.3*2 φ0.025 A (Unit: mm) *2 Processing accuracy : ±0.05 *1 For head mounting bracket C φ10 +0.1 +0.005 0.5 to 1.
PAGE 6
● Mounting to the mounting holes • Detaching the air tube To detach the air tube, (1) press down on the release ring, (2) pull out the tube. The mounting holes on the side of the GT2-H32(L)/H50/A32/A50 unit can be used to install to the side of a table or other surface. Mounting illustration M4 screws (Mounting hole dimensions) 23 ± 0.15 mm (2) M4 tap (1) • Roughness of the mounting surface may cause the sensor to tilt, and sufficient accuracy may not be obtained.
PAGE 7
■ How to mount the lift lever ■ Setup using buttons 1 Mount the lift lever (OP-84397) between the spindle and the contact. Secure the spindle with the lift lever and attach/detach the contact. 2 Set any main display and perform the detection of the detection target (master workpiece) to serve as a reference for zeropoint correction. Master workpiece Press the [PRESET] button (white button) with the master workpiece being detected.
PAGE 8
2 3 4 5 6 Detect the good workpiece and press the [SET] button to capture the detected value. "SEt" and the detected value blink alternately, and the value of the good workpiece is fixed. Detect the HIGH defective workpiece and press the [SET] button to capture the detected value. The median value of this detected value and the one captured in step 2 blinks. HIGH setting value is fixed. Press the right Arrow button until the LOW setting value display of the main display appears. No.
PAGE 9
Setting item ● How to enter the function setting mode Initial value Enter the function setting mode by the following procedure. • In the main display, press the [MODE] button for at least two seconds. dEFALt Static hold delay stability criterion Static hold delay stability width 0.0100 Calculation mode setting noCALc Calculation method C1.mAX *1 When using GT2-P12K (L)(F)/P12 (L)(F)/PA12K /PA12.
PAGE 10
No. Static hold delay stability criterion Only available when "Stb.d" is selected in [ Self timing delay type]. Default User Static hold delay stability width Only available when "USEr" is selected in [ Description With the reference position being 0, set the position where the limit output extension side turns on. When using GT2-71MCN/MCP (analog output type) No. Item Description Analog range Set the analog output range to "dEFALt (head setting stroke)" or "FrEE (free range)".
PAGE 11
<> Special output setting Free range settings (Lo) Only available when "FrEE" is selected in " Analog range setting". MODE Not used Setting value input screen 5-output ■ Additional function setting mode Limit output You can set the following functions in the additional function setting mode. No. Item Description Limit output user setting All GO All limit output Reference Calculation mode 16.
PAGE 12
2nd point detection/capture Jam detection function Not available to set on the main unit that selects "CAL.noH" in [ Calculation mode], and the main unit and expansion unit that selects values other than "t-in" in [ Timing type]. Blink alternately Detect 2nd point MODE Capture the detection value OFF ON Error message User Error display Only available when "USEr" is selected in [ Jam detection function]. Failed to write/read data.
PAGE 13
● Minimum phase difference GT2-71D (pulse output type) Set the minimum phase difference of phase A and phase B (phase A and phase B ). ■ Names of parts of the amplifier Phase A Advanced setting switches Phase B Minimum phase difference: 2.
PAGE 14
Specifications ■ Sensor head GT2-P***/PA*** cannot be connected to amplifier units purchased before April 15th 2014. ● Pencil type (GT2-PA12K/PA12 are air cylinder types) Model Detection system Measuring range Resolution Indication accuracy *1 Measuring force *2 Sampling interval Mechanical response Pressure range Max.
PAGE 15
■ Amplifier (GT2-71(C)N/71(C)P/72(C)N/72(C)P/75N/75P/76N/76P/71MCN/71MCP) Mount type *1 Main unit/Expansion unit *2 NPN output Model PNP output Number of units that can be added *2 Supply voltage *2 Display range Display resolution Normal Current consumption Power saving (eco half) Power saving (eco) DIN rail mount Main unit Expansion unit GT2-71(C)N GT2-72(C)N GT2-71(C)P GT2-72(C)P Panel mount DIN rail mount Main unit Expansion unit Main unit GT2-75N GT2-76N GT2-71MCN GT2-75P GT2-76P GT2-71MCP Up to 14 e
PAGE 16
■ Analog output circuit diagram WARRANTIES AND DISCLAIMERS GT2-71MCN/71MCP Main circuit Orange Green* (1) KEYENCE warrants the Products to be free of defects in materials and workmanship for a period of one (1) year from the date of shipment. If any models or samples were shown to Buyer, such models or samples were used merely to illustrate the general type and quality of the Products and not to represent that the Products would necessarily conform to said models or samples.