Nexen WEB CONTROL PH 16 User manual

1FORM NO. L-20140-G-0105
FORM NO. L-20140-G-0105
EDGE GUIDE SENSOR
PH 16 AND PH 21
WEB CONTROL PRODUCTS
User Manual
Visit www.nexengroup.com for translations of this user manual.
Visite www.nexengroup.com para ver traducciones de este manual del usuario.
Veuillez consulter www.nexengroup.com pour toute traduction de ce présent manuel.
Besuchen Sie bitte www.nexengroup.com für die Übersetzung dieser Gebrauchsanweisung.

2
FORM NO. L-20140-G-0105
In accordance with Nexen’s established policy of constant product improvement, the specifications contained in this
manual are subject to change without notice. Technical data listed in this manual are based on the latest information
available at the time of printing and are also subject to change without notice.
Technical Support: 800-843-7445
[phone]
www.nexengroup.com
Copyright 1999 Nexen Group, Inc.
Nexen Group, Inc.
560 Oak Grove Parkway
Vadnais Heights, Minnesota 55127
ISO 9001 Certified
Read this manual carefully before installation and operation.
Follow Nexen's instructions and integrate this unit into your system with care.
This unit should be installed, operated and maintained by qualified personnel ONLY.
Improper installation can damage your system or cause injury or death.
Comply with all applicable codes.
DANGER

3FORM NO. L-20140-G-0105
Table of Contents
THEORY OF OPERATION ------------------------------------------------------------------------------------------------- 4
INSTALLATION ----------------------------------------------------------------------------------------------------------------- 4
DIMENSIONS------------------------------------------------------------------------------------------------------------------- 5
ELECTRICAL CONNECTIONS ------------------------------------------------------------------------------------------- 6
MAINTENANCE---------------------------------------------------------------------------------------------------------------- 6
TROUBLESHOOTING ------------------------------------------------------------------------------------------------------- 6
SPECIFICATIONS------------------------------------------------------------------------------------------------------------- 6
WARRANTY--------------------------------------------------------------------------------------------------------------------- 7

4
FORM NO. L-20140-G-0105
THEORY OF OPERATION
Nexen’s PH-16 and PH-21 are photo electric edge position
sensors, used as the sensing element of an Edge Position
Control (EPC) System. The sensor may be applied to either
side of the web, or two sensors may be used (one on each
side of the web), for Center Position Control (CPC).
Sensing is accomplished by a light emitting diode (LED), which
transmits light across a gap to a light sensing array. The
sensing array produces an electrical voltage directly
proportional to the amount of light received from the LED. As
an opaque web of material moves in and out of the gap, the
sensor output varies.
INSTALLATION
1. Provide a 1 In. [25 mm] square bar which will span the
web (See Figure 1).
NOTE: This bar is used to support the mounting bracket.
2. Install the Mounting Bracket on the bar (See Figure 2).
3. Mount the bar to the machine (See Figure 1).
NOTE: Make sure the bar is rigidly mounted; any movement
of the bar will affect sensor position.
4. Install a sensor on the Adjusting Screw Projection and
secure it with the Sensor Locking Nut (See Figure 2).
5. Loosen the Adjusting Screw Locking Knob and position
the Adjustment Screw to the midpoint of its travel
(approximately 0.6 In. [15 mm]) (See Figure 2).
Install Support Bar
either side (Mid-Process)
Install Support Bar either side
(Unwind) Support Bar must be
partof MainMachine Frame
Last
Machine
Roll
Roll attached to
UnwindStand
First
Machine
Roll
Guide Roll
Mechanism Install Support Bar
either side (Rewind)
Support Bar must be
part of Rewind Stand
FIGURE 1
Bar
Sensor
Locking
Nut
Adjusting
Screw
Projection
Clamping
Screws
Hex
Adjustment
Screw
Adjustment
Screw
FIGURE 2
Excitation for the LED is provided by a Web Guide Amplifier.
The sensor's output return signal is fed back to the same
amplifier for closed loop control.
A mounting bracket, provided with the sensor, includes a micro
adjustment screw and lock nut. The adjustment screw allows
up to 0.79 In. [20 mm] of sensor movement without moving the
bracket.
Adjusting Screw
LockingKnob
Mounting
Bracket

5FORM NO. L-20140-G-0105
FIGURE 3 SCREW GUIDER
45
40
0 +0.2
25
50 70
40 `80
9
100 `120 9
60
Mounting
Bar
Bar
Clamp
Knob
Position
Adjustment
Knob
FIGURE 4
DIMENSIONS
PH21
PH16

6
FORM NO. L-20140-G-0105
Photo Head
LED
Red
Black
Green
White
Cable 16 ft. [5m]
Red- Signal Output
Black- Signal COM
Shield
Green- +12 V Power
White- Power COM
Sensing
Array
ELECTRICAL CONNECTIONS
The PH 16 and PH 21 come with a 16 Ft. [5 m], 4 conductor
shieldedcable.
Make the electrical connections to the Web Guide Controller
according to the instructions provided with the controller (See
Figure 5).
NOTE: The cable may be extended up to 500 Ft. [156.25 m],
using four conductor 18 AWG [0.9 mm] shielded cable.
MAINTENANCE
System accuracy can be affected by dust or dirt on the glass
surfaces of the light emitter and receiver. Periodically wipe
these surfaces with a soft, clean, dry cloth.
TROUBLESHOOTING
If the sensor fails to provide a signal to the Web Guide
Amplifier,checkthefollowing.
1. Determine ifthe amplifierisproviding a12 VDC excitation
signal to the Sensor.
2. If an excitation signal is present, check the LED for proper
operation.
3. If the LED is operating correctly, check the output voltage
of the sensor (See SPECIFICATIONS).
FIGURE 5
PH-16 and PH-21
SPECIFICATIONS
PH-16
Excitation --------------------------------------------------------------- 12VDC
Output-------------------------------------------------------- OPEN, 350 mV
------------------------------------------------------------------ BLOCKED, 0 V
MeasuringWidth ------------------------------- ± 0.20 In. (±5.08 mm)
Sensitivity ------------------------------------------------0.004 In. [0.1 mm]
Weight-------------------------------------------------------2.5 Lbs. [1.1 kg]
Temperature Range--------------------------- 32o–122oF [0o–50oC]
PH-21
Excitation --------------------------------------------------------------- 12VDC
Output-------------------------------------------------------- OPEN, 350 mV
------------------------------------------------------------------ BLOCKED, 0 V
MeasuringWidth ------------------------------- ± 0.20 In. (±5.08 mm)
Sensitivity ------------------------------------------------0.004 In. [0.1 mm]
Weight-------------------------------------------------------1.3 Lbs. [0.6 kg]
Temperature Range--------------------------- 32o–122oF [0o–50oC]
CAUTION
Wire continuity and shielding integrity must be maintained
when extending the cable.
WARNING
DonotdisassembletheEdgeGuideSensor. Attempting
to disassemble the Edge Guide Sensor will void the
warranty. ContactNexenifreplacementpartsorservice
is required. There are no customer replaceable parts.

7FORM NO. L-20140-G-0105
WARRANTY
Warranties
Nexen warrants that the Products will be free from any defects in material or workmanship for a period of 12 months
from the date of shipment. NEXEN MAKES NO OTHER WARRANTY, EXPRESS OR IMPLIED, AND ALL IMPLIED
WARRANTIES, INCLUDING WITHOUT LIMITATION, IMPLIED WARRANTIES OF MERCHANTABILITY AND FIT-
NESS FOR A PARTICULAR PURPOSE ARE HEREBY DISCLAIMED. This warranty applies only if (a) the
Product has been installed, used and maintained in accordance with any applicable Nexen installation or maintenance
manual for the Product; (b) the alleged defect is not attributable to normal wear and tear; (c) the Product has not been
altered, misused or used for purposes other than those for which it was intended; and (d) Buyer has given written
notice of the alleged defect to Nexen, and delivered the allegedly defective Product to Nexen, within one year of the
date of shipment.
ExclusiveRemedy
The exclusive remedy of the Buyer for any breach of the warranties set out above will be, at the sole discretion of
Nexen, a repair or replacement with new, serviceably used or reconditioned Product, or issuance of credit in the
amount of the purchase price paid to Nexen by the Buyer for the Products.
Limitation of Nexen’s Liability
TO THE EXTENT PERMITTED BY LAW NEXEN SHALL HAVE NO LIABILITY TO BUYER OR ANY OTHER PERSON
FOR INCIDENTAL DAMAGES, SPECIAL DAMAGES, CONSEQUENTIAL DAMAGES OR OTHER DAMAGES OF
ANY KIND OR NATURE WHATSOEVER, WHETHER ARISING OUT OF BREACH OF WARRANTY OR OTHER
BREACH OF CONTRACT, NEGLIGENCE OR OTHER TORT, OR OTHERWISE, EVEN IF NEXEN SHALL HAVE
BEEN ADVISED OF THE POSSIBILITY OR LIKELIHOOD OF SUCH POTENTIAL LOSS OR DAMAGE. For all of
the purposes hereof, the term “consequential damages” shall include lost profits, penalties, delay images, liquidated
damages or other damages and liabilities which Buyer shall be obligated to pay or which Buyer may incur based
upon, related to or arising out of its contracts with its customers or other third parties. In no event shall Nexen be liable
for any amount of damages in excess of amounts paid by Buyer for Products or services as to which a breach of
contract has been determined to exist. The parties expressly agree that the price for the Products and the services was
determined in consideration of the limitation on damages set forth herein and such limitation has been specifically
bargained for and constitutes an agreed allocation of risk which shall survive the determination of any court of compe-
tent jurisdiction that any remedy herein fails of its essential purpose.
Limitationof Damages
In no event shall Nexen be liable for any consequential, indirect, incidental, or special damages of any nature whatso-
ever, including without limitation, lost profits arising from the sale or use of the Products.
Warranty Claim Procedures
To make a claim under this warranty, the claimant must give written notice of the alleged defect to whom the Product
was purchased from and deliver the Product to same within one year of the date on which the alleged defect first
became apparent.
Nexen Group, Inc.
560 Oak Grove Parkway
Vadnais Heights, MN 55127
800.843.7445
Fax: [phone]
www.nexengroup.com
ISO 9001 Certified