PHOTOHEAD PH30, PH31

Overview Feature Examples of applications of the Photohead system Specifications Product Catalog

Overview

The Photohead is the sensor of an EPC (Edge Position Control) system. It uses optical means to detect the edge of a strip (web).
The sensor signal is transmitted to an amplifier, and the amplified output signal is forwarded to a hydraulic jet pipe type controller or a servo valve, controlling the strip edge, so that it remains at the determined position.
If the operating environment of the Photohead is exposed to airborne dust, or if there is the risk that oil or water droplets etc. could fall onto the Photohead projector lens, use a sensor with the air purge specification.

Feature

The Photohead utilizes parallel light flux and detects the edge position of a strip (web) electrically.

Examples of applications of the Photohead system

Applications of Photohead EPC System

Pay-off reel system

Steering roller system (Intermediary guide roller)

Specifications

Power supply	Adjust the voltage supplied from the amplifier to: PH30 : 6V DC PH31 : 12V DC
Output Voltage	Voltage proportional to variation of light intensity at the silicon light sensor element (mV).
Sensitivity	Detects positional variations of 0.1mm in a strip (opaque web).
Compressed air consumption for air purge specification	400NL/min (at 0.05MPa)
Allowable back pressure	0.05MPa
Paint color	Silver
Ambient temperature	-10 to +60℃
Range of measurement	20mm
Body material	Aluminum alloy castion
Light source:	12V tungsten bulb
Mass	PH30 : 3kg PH31 : See below

Mass of PH31

Model	V	W	X	Y	Z	MASS(kg)
PH31-3	300	200	270	540	554	31
PH31-4	400	200	320	640	654	33
PH31-5	500	200	370	740	754	36
PH31-6	600	200	420	840	854	38
PH31-7	700	400	470	940	954	40
PH31-8	800	400	520	1040	1054	42
PH31-9	900	400	570	1140	1154	44

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