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Digital Interval Control Model CT-9
Part 104 499A
NORDSON CORPORATION l AMHERST, OHIO. USA
Nordson Corporation welcomes requests for information, comments and inquiries about its products.
Address all correspondence to
Nordson Corporation 11475 Lakefield Drive
Duluth, GA 30136
Notice
This is a Nordson Corporation publication which is protected by copyright. No part of this document may be photocopied, reproduced, or translated to another language without the prior written consent of Nordson
Corporation. The information contained in this publication is subject to change without notice.
Trademarks
AquaGuard, Blue Box, Control Coat, Equi=Bead, FloMelt, FoamMelt, FoamMix, Helix, Hot Shot, Hot Stitch, Meltex, MicroSet, MultiScan, Nordson, the Nordson logo, OmniScan, Porclus Coat, Posi-Stop, RBX, Sure-Bond,
UniScan, UpTime, and Versa-Spray are registered trademarks of Nordson Corporation.
BetterBooksM, CF, Controlled Fiberization, Easy-Screen, Fibermelt, Flo-Tracker: PrintGuard, and Package of Values are trademarks of Nordson Corporation.
Manual 57-16 104 499A Issued 9/81
0 1981 Nordson Corporation All Rlghls Reserved
0 Nordson CORPORATION /Amherst, Ohio 44001 TECHNICAL Bl/BlICATION 57-16-l
Figure 1 - CT-9 Digital hnterval Control
DESCRIPTION
The Nordson Model CT-9 Digital Interval Control is a solid state, sequential “delay-duration” control which is designed for use in applications requiring a consistent placement of adhesive at varying conveyor line speeds in a range of 6 to 200 meters per minute. An incremental encoder, geared to the parent machine, provides the CT-9 Control with the necessary input in the form of voltage pulses which enables the CT-9 to compensate for line speed changes. The CT-9 also compensates for the time it takes for the mechanical actuation of the adhesive dispensor or gun. In addition, the CT-9 will automatically inhibit the gun actuation signal if the conveyor line speed should go below 6 meters per minute, eliminating the possibility of a gun-on condition if the line should stop during the control cycle.
The CT-9 controls length intervals. Digital thumbwheel switches on the CT-9 cabinet face permit adjustment of length intervals. By gearing the incremental encoder to the parent machine properly, the digits will correspond to millimeters (an optional U.S. measure calibrat!on is also possible - see installation instructions). The accuracy of thumbwheel switch settings depends upon the accuracy of encoder to parent machine gearing.
LED indicator lights on the CT-9 cabinet face provide visual indication of output signals. An ON/OFF toggle switch controls electrical power while a 2-l/2 Amp fuse protects the CT-9 from damage due to electrical failure.
The CT-9 Digital I n erval t Control is available as a one, two, three, or four channel unit. The maximum output of the CT-9 is 4 Amps at 24 VDC. Each channel can operate a number of 24 VDC solenoid valves as long as the total output requirement is no more than 4 Amps at any one time. Th e complete system consists of the CT-9 Control, an incremental encoder, a light source, a phototransistor/sensor, and necessary wiring cables to connect these components.
I ‘TM3 II ‘Y A ISSlJED 9/79 SUPERSEDES COPYRIGHT @) 1979 NORDSON
57-16-2 CORPORATION /Amherst. Ohio 44~101 TECHNICAL PUBLICATION
SPECIFICATIONS
Interval Length Range*, Delay or Duration: 1 - 999 Imil limeters
Repeat Accuracy Error: + 2 mil I imeters
Temperature Drift: Less than + 2% from 5 - 49OC (40 - 120’ F)
Input Trigger: Photosenisor break1 ight or photosensor makelight; contact opening or contact closing
output: 4 Ampere @ 24 VDC
Power Requirements: lOO/ 120/200/240 VAC,
A
50/60 Hz., Single Phase
‘s The CT-9 is designed for use only with an AC input having a neutra I leg.
NOTE: Accuracy of the interval length range, thumbwheel switch setting, and repeat error
depends upon accuracy of the encoder - to - parent machine gearing.
--r/n 07 1 ,209 DIA.
A. 15.5 in. (393.7 mm) B. 12.0 in. (304.8 mm)
c. 6.0 in. (152.4 mm)
D. 10.0 in. (254 mm)
E. 14.75 in. (374.7 mm)
CT-9 CABI NET
A. 3.00 in. (76.2 mm) H. 2.63 in. (66.8mm)
B. 1.50 in. (38.1 mm) I. 3.12 in. (79.2 mm)
C. 1 .62 in. (41 .l mm) J. 1.50 in. (38.1 mm)
D. 3.25 in. (82.6mm) K. .75 in. (19.1 mm)
E. 1.25 in. (31.8 mm) L. 4.64 in. (117.9 mm)
F. 2.50 in. (63.5 mm) M. .375 in. (9.5 mm)
G. 1 .31 in. (33.3 mm)
ENCODER
* Optional U.S. measure calibration is possible. See installation and set-up instructions
on page 57-16-9.
ISSUED 9/79 SUPERSEDES LITHO U.S.A.
0 Nordson CORPORATION / Amherst, Ohio 44001 TECHNICAL PUBLICATION !i 7- 16 - 3
THEORY OF OPERATION
(Refer to the block diagram in figure 2, page 57-16-5.)
Photosensor and Light Source
The CT-9 control sequence is initiated when a substrate on the conveyor line breaks the light beam to a phototransistor. The phototransistor acts as a switch to trigger the CT-9.
S vstem C lock
The system clock controls all functions of the CT-9 control sequence.
Trigger Circuit
The trigger circuit converts an analog signa I from the phototransistor into a digital signal. The digita I signa I triggers the first summation node.
Incrementa I Encoder
The incremental encoder generates voltage pulses as its shaft rotates, producing 200 pulses per revolution. For the delay and duration thumbwheel switches to correspond to milli- meters, the encoder should be geared to the parent machine so that 200 millimeters of line travel provides one (1) encoder shaft revolution. One (1) meter of line travel would therefore produce five (5) revolutions of the encoder shaft. The accuracy of this relation- ship will determine the accuracy of the thumbwheel switch settings. If the gearing is off by 10% the accuracy of the thumbwheel switch settings will likewise be off 10%.
Incremental Encoder Synchronization
The voltage pulses generated by the incremental encoder are synchronized with the voltage pulses of the rest of the system.
Pull-In Compensation Counter
This adiustable counter can be set for the fixed time it takes for the adhesive gun to energize. This counter samples input from the incrementa I encoder and automatically adjusts the delay interval so that the automatic gun, when triggered, will begin to deposit adhesive at the desired location on the product.
Summation Node #l
Input from the incremental encoder and the pull-in compensation counter are summed together continuously at summation node #l . When a product passes the photosensor the trigger circuit signals the summation node which in turn starts the delay length interval.
De lay
The de lay interval counts down the pre-set length dialed in at the appropriate thumbwheel switches. This represents the distance from where the product passes the photosensor to the point where the automatic gun is to deposit the adhesive.
Drop-Out Compensation
This adjustable counter can be set for the fixed time it takes for the adhesive gun to shut off. This counter samples input from the incremental encoder and automatically adjusts the duration length interva I to provide the desired adhesive deposit from the automatic gun.
LITHO U.S A.
ISSUfl? 9/79 .WIPFacrnrc COPYRIGHT 0 1979 NGRDSON
5 7 - 16 - 4 CORPORATION / Amherst, Ohio 44001
THEORY OF OPERATION (Continued)
Summation Node #2
TECHNICAL PUBLICATION
Input from the incremental encoder and the drop-out compensation counter are summed together continuously at summation node #2. When the de lay length has counted down completely the signa I continues to this summation node which in turn activates the duration length interva I.
Duration
The duration interval counts down the pre-set length dialed in at the appropriate thumbwheel switches. This represents the length of adhesive deposit on the product moving passed the automatic gun. When counted down completely the gun will shut off, completing the CT-9 control sequence for that product.
ISSUED 9/79 SUPERSEDES LITHO U S A.
0 Nordson CORPORATION / Amherst, ohi0 44001 TECHNICAL PUBLICATlON 5 7- 16 - 5
LITHO U.S A.
h i I’ I
Z ‘I 0 ru ‘I
‘I 3= 3
Y
ll ‘I ‘I ‘I ‘I ‘I !I
SUPERSEDES COPYRIGHT @ 1979 NORDSON
57-16-6 0 Nordson CORPORA TION /Amherst, Ohio 440~ TECHNICAL PUBLICATION
3urrL-f
BCARD
- ii I 1 SOURCE i i I I LIGHT
U ii I V
I I PHCTCXENSOR ’ I
4-l I I I I I I I I o-1 II
It’KREhtENTAL 1 1
ENCODER ; ;
I I I I I I I I
II I I I I
II I I
II I I I I I I
CHANNEL
BCARD 2 I I
U CHANNEL1 1 j-=
I !i SOLENOIDS
1 BOARD3 ] 1 $i BOARD2 ) ih u/
I
1 I L ---------I.-- ------------
Ii 1
I’
4
I’ 0
I’ I’ I
------------ ------------
Figure 3 - CT-9 C’ lrcuit Board Operation Diagram
ISSUED 9179 SUPERSEDES LITHO U.S.A.
Please observe the following safety precautions to prevent injury to personnel or damage to equipment.
A 1cs
A t
A t
0
The CT-9 Digita I lnterva I Control contains electrical potentia Is that could be fatal. Use extreme caution when working with and troubleshooting this equipment.
To prevent electrical shock during installation and troubleshooting, install a circuit breaker on the service line ahead of the CT-9 Digital lnterva I Control. Using this disconnect, shut off all electrica I power to the CT-9 during installation and service (unless troubleshooting requires that power be on).
DO NOT insert or remove digital circuit boards from the CT-9 unit with the power on. SHUT OFF CT-9 main switch.
Use the proper techniques in the handling and storage of digital logic circuit boards to prevent damage to the components.
0 NOrdson CORPORATION /Amherst, Ohio 44001 TECtfNICAl PUBLICATION 5 7-l 6-l Cl-9 SAFETY PRECAUTIONS
1. All digital circuit boards should be placed on a grounded bench surface. Operator or service personnel should ground themselves prior to handling circuit boards, since a worker can be statica Ily charged with respect to the bench surface which can damage the circuit board.
2. Minimal handling (touching of the circuit board components) is important because oils
on hands will degrade performance of circuit boards.
3. All digital circuit boards are stored and trans:ported in individual, conductive plastic bags. Digital circuit boards should not be inserted into conventional plastic bags or trays.
LITHO U.S.A,
ISSUED 9/19 SUPERSEDES COPYRIGHT @ 1979 NORDSCN
CORPORATION /Amherst, Ohio 440~71 TECHNICAL PUB1 ICATlON
n -.
D -.
-----
-B-B-B--
w‘
ISSUED 9/79 SUPERSEDES LITHO U.S.A.
0 Nordson CORPORATION /Amherst, Ohio 44001 TECHNICAL PUB1 /CATION 57-16-9
INSTALLATION
Remove the CT-9 Control, encoder, and photosensor and light source from their shipping containers. Carefully inspect the components for shipping damage. Open the CT-9 cabinet door and visually check for loose connections, loose circuit boards, and broken wires. (Confirm that all circuit boards are secure and all cable plugs are firmly connected.)
1. Install the CT-9 on the parent machine or separate stand so that the front panel is readily accessible.
NOTE: Do not subject the CT-9 to excessive vibration, dust, or moisture, lnsta I I with vibration insulators if necessary.
2. Install the encoder on the parent machine in an area of minimum vibration.
Metric Ca Iibration:
The gear ratio between the encoder and the parent machine should be chosen to provide one (1) revolution of the encoder shaft per 200 millimeters of line travel (five [5] revolutions of the encoder shaft per one [ 11 meter of line travel). Thumbwheel switch settings for the delay and duration intervals will then correspond to millimeters, with a range of l-999 millimeters.
U.S. Measure Calibration:
The gear ratio between the encoder and the parent machine should be chosen to provide one (1) revolution of the encoder shaft per 20 inches of line travel. Thumbwheel switch settings for the delay and duration intervals will then correspond to inches, with a range of 0.1 - 99.9 inches. Minimum I ine speed would be 50 feet per minute.
NOTE: If the CT-9 is to calibrated for U.S,, measure place labels provided on the cabinet face to show the appropriate unit of measure and to indicate one decimal place on the thumbwheel switches.
The drive to the encoder must be positive with relationship to the moving object on which adhesive is to be applied. Any sl ippage wil I cause the operation to vary by the amount of movement between the encoder and the moving object. See figure 5 below for suggested methods of mounting the encoder to the parent machine.
0 Be careful not to drop the encoder or damage it in any way during installation. Do not hit the encoder with a hammer or heavy obiect.
Be sure the encoder drive is provided with appropriate guards or enclosure to prevent injury that might resu It from inadvertant contact by personnel.
,
Figure 5 - Encoder lnstal lation Options,
LITHO U.S A. ISSUED 8/79 SUPERSEDES COPYRIGHT @ 1979 NORDSON
5 7- 16 - 10 0 Nordson CORPORATION /Amherst, Ohio 44001 TECHNICAL PUB1 ICATION
INSTALLATION (Continued)
3. The phototransistor and light source should be instal lled in an area where the light beam is interrupted by the moving object, placed so that each object initiates its own control sequence. They must be located aheald of the adhesive dispensor or gun on the conveyor line in an area where strong ambient light will not affect the phototransistor and where they will not become covered with dust or paper fiber. The maximum distance between the phototransistor and light source should be no more than 5 ft. (1 .5 meters). For best results, locate thlem as close together as possible.
4. Open the CT-9 cabinet door by loosening the two (2) retaining clips.
5. Make all electrical connections on the appropriate terminal boards (TBl and TB2) in the bottom of
NOTE:
the cabinet. (Refer to figure 6’)’ .
There are four (4) voltage versions of the CT-9 Digital Timer. Be certain to connect the CT-9 to the correct power source. ment check the nameplate.
To confirm the voltage require-
0
A Applying the incorrect voltage may damage the components.
The CT-9 is available as a one, two, three, or four channel model.
Do not field convert the CT-9 from one voltage to another and do not field VP convert the number of channels. Any such conversion must be rZidet the factory or warranty wi II become void.
A. To connect the trigger input (phototransistor receiver) use one of the following procedures:
1. For photosensor makelight (or normully open switch) mode connect the red lead wire to TBl-13 and connect the black lead wire and wire shield to TBl-14. A jumper must be connected between terminal 611 and fl2.
2. For photosensor breaklight (or norma lly closed switch) mode connect the red lead wire to TBl-11 and connect the bllack lead wire and cable shield to TBl-12.
0 The photosensor receiver is polarity sensitive. (See figure 7)
Be certain to wire it correctly.
3. Do not ground wire shield at sensor (or switch ) end. False triggering may result.
8. Connect the light source lead wires to TBl-9 and TBl-10.
c. Connect the gun solenoids (24 VDC only) to the CT-9 in the following manner:
Channel 1 : TBl-1 and 2 Channel 2: TBl-3 and 4 Channel 3 : TBl-5 and 6 Channel 4: TBl-7 and 8
Channels may be wired to work in parallel. (See figure 8, page 57-16-l 1)
Channels cannot be wired to work in series.
ISSUED 9179 SUPERSEDES LITHO U.S.A.
TECHNICAL PUB1 /CATION 5 7 - 16 - 11 0 Nordson CORPORATION /Amherst, Ohio 44001
INSTALLATION (Continued)
D. Connect the encoder to the CT-9 in the following manner:
Attach the black (common) lead wire to TBl-15; Attach the red (+12 VDC) lead wire to TBl-16; Attach the clear (signal input) lead wire to TBl-17.
E. Connect electrica I power to the CT-9. nameplate.
Confirm the power requirements on the
Connect TB2-1 to line voltage; Connect TB2-2 to neutral; Connect TB2-3 to earth ground.
6. The CT-9 Digital Interval Control is ready for set-up.
The CT-9 is designed for use only with an AC input having a neutra I leg. Do not connect the CT-9 to ax input having no neutra I leg.
TB-1 TB-2
CHl CH2 CH3 CH4 I I I I
SGLENOID CONNECTIONS T&G*GE; IdPUTS
(See fig. 6)
LITHO U.S A.
IONS L GND
AC INPUT
Figure 6 - E lectrical Connections
BREAKLIGHT MODE
MAKELIGHT MODE
RED BL 1 RED
SHIELD :HIE LD
1 23456 78
lb 0
l l . .
CHl CH 2
Figure 7 - Trigger Input Connections (Phototransistor leads)
Figure 8 - Parallel Channel Connections
ISSUED 9/79 SUPERSEDES COPYRIGHT 0 1979 NORDSON
5 7- I6 - I 2 0 Nordson CORPORATION /Amherst. Ohio 44001 TECHNICAL PUBLICATION
System Guide lines:
CT-9 SET UP PROCEDURE
1. Minimum allowable encoder speed is 30 RPM. Minimum line speed: Metric - 6 mpm; U.S. - 50 fpm.
2. Gun pull-in time averages 12 milliseconds. Gun drop-out time averages 5 milliseconds.
3. The adjustable compensation counters for the gun pull-in and drop-out time are calibrated in l/4 millisecond increments.
4. The solenoid va Ive used to actuate the adhesive gun should be located as c lose as possible to the gun itself to minimize time of mechanica I ictuation.
5. Air pressure to the solenoid valve should provide 50-70 PSIG. Confirm that there are no air leaks or fluctuations that would otherwise affect actuation time.
Set-Up:
Please refer to figure 4, figure 9, and also to the nomograph on page 57-16- 14.
1.
2.
3.
4.
5.
6.
7.
Determine maximum line speed.
Using the CT-9 Compensation Nomograph, page 57-16-14, determine minimum interval for compensation of 48 (equivalent of 12 milliseconds) and maximum line speed. This is the shortest delay length possible.
Using the CT-9 Compensation Nomograph, determine minimum interval for compensation of 20 (equivalent of 5 mi Iliseconds) and maximum line speed. This is the shortest adhesive bead length that can be applied.
Confirm that the encoder is geared to the parent machine properly. See installation instructions, page 57-l 6- 9.
Locate object to be sensed on the conveyor line. If no discrete object is to be used, locate a convenient point on the conveyor line at which interval control may be initiated.
Locate the light source and phototransistor in line with the leading edge of the object to be sensed. This will be called the trigger point.
NOTE: If possible, the light source should be below the object and aimed vertically upward toward the phototransistor. ambient lighting.
This reduces false trigger signa Is from
If no discrete object is being used, provide a photosensor signal or switch contact at the convenient point established in step 5. This will also be called the trigger point.
The phototransistor and light source a Iignment is critical. To insure proper a Iignment follow these steps :
a. Confirm that conveyor line is not running and that CT-9 on/off switch is in the OFF position .
b. Open cabinet and disconnect phototransistor leads.
c. Attach a voltmeter to the phototransistor receiver.
ISSUED 9i79 SUPERSEDES LITHO U.S A.
0 Nordson CORPORA TION / Amherst, Ohio 44001
CT-9 SET-UP PROCEDURE (Continued)
TECHNICAL PUB1 /CATION !i 7 - 16 - 13
1. The voltmeter’s positive lead should be on the receiver’s red wire.
2. The voltmeter’s negative lead should be on the receiver’s black wire.
8.
9.
10.
11.
12.
d. Turn the CT-9 power on.
e. Align the phototransistor receiver and (less than 1 .O volts).
f. Turn OFF CT-9 and remove voltmeter
ight source for the lowest possible reading
eads o
g= Close control cabinet and secure with retaining clips.
Locate the adhesive applicator gun downstream from the trigger point by at least the minimum delay interva I determined in step 3.
Place the object to be sensed at the trigger point.
Measure the distance from the applicator gun to the beginning of the desired adhesive bead. Set delay thumbwheel switch to this distance.
Measure the length of adhesive bead required and set the duration thumbwheel switch to this distance. This distance cannot be less than the minimum duration interval determined in step 4.
Set the delay compensation (gun pull-in) control at 48.
A 9 Shut off electrical power BEFORE opening the CT-9 control cabinet to prevent injury due to electrica I shock.
13. Set the duration compensation (gun drop-out) control at 20.
NOTE: The compensation counters are calibrated in l/4 mi Ilisecond increments. Average gun pull-in time is 12 milliseconds. Set the pull-in time compen- sation counter to 48 (12 x 4). The average gun drop-out time is 5 milliseconds. Set the drop-out time compensation counter to 20 (5 x 4). See Figure 9.
DROP-OUT
COMPENSATION
TENS
‘UNITS-
I (counters located on clock board)
) PULL-IN COMPENSATION
LITHO U.S A.
rP*rphp 9179 Figure 9 - Gun Actuation Compensation
5 7~ ‘I 6 - I4 0 Nordson CORPORATION /Amherst. Ohio 44001
CT-9 SET-UP PROCEDURE (Continued)
TECHNICAL PUBLICATION
CT-9 COMPENSATION NOMOGRAPH
Given line speed and compensation setting, determine minimum interval to be controlled:
Metric Measure: mm = MPM x Compensation x 0.00417
U.S. Measure: inches = FPM x Compensation x 0.00005
LINE SPEED MINIMUM COMPENSATION INTERVAL SETTING
1000
900
800
700
600
s 50 i 500
a g 40 400
m
E 30 300 c Lu
20
t
200
10 9
8
7
6
c w w u
20
10
5
ii 4
E 3
ua a 2
Y i
2
1.0
.8
.6
13”. v)
l 2 E 0
a
:
g 1.0
5 .lO
z .
.08 .5 .06 ,4
3 .04
003 .2
.02
-10
4
100
zoo 70
60
10
ii 7 6
5
L
ISSUED 9179 SUPERSEDES LITHO II S A
. 0 Nordson CORPORATION /Amherst, Ohio 44001
CT-9 SET-UP PROCEDURE (Continued)
TECHNICAL PUBLICATION 5 7- 16 - 15
14.
15.
16.
17.
18.
19.
20.
21.
22.
Confirm that the adhesive application system is operational (at operating temperature and air pressures).
Turn CT-9 on/off switch to ON.
Begin at a low conveyor speed and monitor the adhesive bead application while increasing line speed.
Measure the delay length on the object and reset the delay thumbwheel if necessary.
If the beginning of the applied adhesive beacl moves as line speed is increased, change the delay compensation (gun pull-in counter):
a. bead moves downstream - increase compensation counter setting.
b. bead moves upstream - decrease compensation counter setting.
Measure applied adhesive bead length and reset the duration thumbwheel if necessary.
If the applied adhesive bead length changes as line speed is increased, change the duration compensation (gun drop-out counter):
a. bead length increases - increase compensation counter setting.
b. bead length decreases - decrease compensation counter setting.
Repeat steps 17-20 until the desired bead length and placement are achieved.
For each adhesive bead or controlled interval (separate CT-9 channel) repeat steps 9-21.
DAILY OPERATION
Daily Start Up
Once the CT-9 Digital Interval Control has been installed and set up properly, it is not necessary to readjust the unit unless a new job is to be run which requires a different adhesive application.
To activate the CT-9 simply turn the unit ON at the toggle switch. The indicator light should glow.
Daily Shut Down
Turn the CT-9 OFF at the toggle switch.
LITHO U.S.A.
ISSUED 9/79 SUPERSEDFS COPYRIGHT @ 1979 NORDSON
5 7 - 16 - 16 0 Nordson CORPORATION /Amherst, Ohio 44001 TECHNICAL PUBLICATION
MAINTENANCE
Servicing of this equipment should be performed only by qualified personnel. Disconnect main power supply when servicing equipment, since the input terminal board is electrically hot even when the on/off switch is OFF. Failure to observe this warning could result in damage to equipment and/or injury to personne I.
Genera I
As with any solid-state device, the Model CT-9 Digital lnterva I Control requires no periodic maintenance unless the unit is subjected to adverse environmental conditions such as dust, vibration or moisture. Nevertheless, difficulties may occur with the operation of the control system. Before troubleshooting the CT-9, determine that the problem does in fact rest with the Control.
Applicator Operation
The capability of an applicator is a Iso a factor in obtaining satisfactory operation. Insure that the air pressures to the pump and the gun solenoids are correct and constant. Erratic gun firing can result if the triggering air pressure is inadequate.
Operating air to the solenoid must be filtered to remove dirt and water. Air lubrication usually
is not required.
Physica I Conditions
The guns should be mounted securely, and the distance to the substrate should be uniform and constant .
Air movement around the guns can have an adverse effect upon the system’s operation. The guns should be shielded from moving air that cannot otherwise be eliminated.
Visua I Inspection
Use the following steps to make a thorough visual inspection of the CT-9 Digital lnterva I Control:
1. Turn power OFF.
2. Open CT-9 cabinet.
3. Check to see that a II circuit boards are properly connected and secured.
Check for loose or broken wires and components. ’
Press all connectors carefully yet firmly into their sockets.
If the LED indicator lights (on cabinet face) flash, the problem is probably outside the CT-9.
ISSUED 9/79 SUPERSEDES LITHO U.S.A.
0 Nordson CORPORATlON /Amherst. Ohio 44001 TECHNICAL PUB1 /CATION 5 7 - 16 - 17
TROUBLESHOOTING
The CT-9 contains electrical potentials which could be fatal. Use extreme caution when working with and troubleshooting this equipment. See “CT-9 Safety Precautions” , page 57- 16- 7 for addiitiona I information.
Refer to the electrical wiring diagram, figure 11, on page 57-16-23,
CT-9 TROUBLESHOOTING CHART
LITHO U.S.A.
ISSUED 9/79
CONDITION
Power switch on. Power indicator lamp off.
PROBABLE CAUSE
1. Power Connections.
SUGGESTED CORRECTION
1. Check input power: a. Set VOM to 250 VAC range. b. Place probes on TB2-1 and
TB2-2. Meter reading should coincide with power require- ments of unit.
c. If not, check input power
supply l
2. 2-l/2 Amp fuse. 2. Check fuse: a. Set VOM on resistance
measurement. b. Check for continuity. c. If no continuity, replace
fuse.
3. Toggle switch. 3. Check primary voltage of transformer: a. Set VOM to 250 VAC range. b. Place probes on TB3- 1 and
TB3-4. Meter reading should coincide with power requirements of unit. Switch on - rated voltage Switch off - 0 VAC
c. If not, replace switch. ’
4. Indicator lamp, 4. If voltage coincides with power requirements but power indicator lamp is sti I I off, replace lamp.
Power on, 1 . Line speed below Power indicator lamp on. minimum specificatiion.
1 . Increase line speed .
No indication of trigger I signal. 2. No trigger signa I ~ 2. a. Check phototransistor input
wiring - refer to page 57-16-11.
b. Check phototransistor and light source alignment - refer to page 57- 16- 12.
3. No signal from incrementa I encoder.
3 . a. Check encoder input wiring - refer to page 57-16- 11 .
SUPERSEDES COPYRIGHT @ 1979 NORDSON
5 7 - 16 - 18 0 Nordson CORPORA TION / Amherst. Ohio 44001 TECHNICAL PllBLICAllON
CT-9 TROUBLESHOOTING CHART (Continued)
PROBABLE CAUSE SUGGESTED CORRECTION I
3. No signal from incrementa I encoder.
(cont’d)
3. b. Set VOM to 20 VDC range. Place probes on TBl-15 and TBl-17. Meter reading should be 6VDC +l VDC.
c. If not, replace encoder. I
4. Power supplies not 4. Check power supplies - refer to functiona I. page 57- 16- 20.
5. Clock board. 5. Replace clock board. .
6. Channel board. 6. Replace channel board. .
1. Adhesive application equipment.
1. Check system power and temp- eratures.
.
2. Nozzle clog. 2. Remove and clean nozzle.
3. Gun solenoid. 3. a. Check solenoid wiring - refer to page 57-16-11.
b. Check for proper voltage solenoid - 24 VDC.
c. Check for proper coi I resistance - refer to page 57-l-l.
d. Replace solenoid.
4. Driver board. 4. Replace driver board. I
, 5. Power supply board. 5. Check power supplies - refer to page 57- 16-20.
.
1 . Trigger signal l 1 . Check alignment of phototransistor and Light Source - refer to page 57-16- 12.
2. Thumbwheel setting. 2. Setting may be too low for line speed - check nomograph, page 57-16-14.
CONDITION
Power on. Power indicator lamp on. No indication of trigger signal e (cont‘d)
Power switch on. Power indicator lampon. Indication of trigger (delay and duration LED’s
flash) . Gun does not function.
Solenoid operation erratic. Delay and duration LED’s flash erratica lly.
~ 3. Check initial set-up - refer to
I page 57-16-12.
3. Compensation setting.
4. Replace channel board. 4. Channel board.
5. Replace clock board. 5. Clock board.
With adjustment of thumbwhee I setting, no change in output.
1. Check thumbwheel switches - refer to page 57-l 6- 20. Replace if defective.
1. Thumbwheel switches.
2. Replace channe I board. 2. Channel board.
LITHO U.S.A.
ISSUED 9179 SUPERSEDES
0 Nordson CORPORATION /Amherst, Ohio 44001
CT-9 TROUBLESHOOTING CHART (Continued)
CONDITION
Bead lacement shifts with ine speed. P
Unit cycles continuously, independent of trigger signa I.
Small change in thumbwhee I setting cause large change in bead placement or length.
Unit operates norma I ly , but delay and/or duration LED’s do not flash .
Control function changes after the system has been set up properly and operating norma I ly for a period of time.
TECHNICAL PUB1 ICATION 5 7- 16 - 19
PROBABLE CAUSE I SUGGESTED CORRECTION I
1. Compensation setting. 1. Check intial set-up, page 57-16- 12.
2. Channel board. I
2. Replace channel board. I
3. Clock board. I 3. Replace clock board. I
1 . Trigger signa 1. 1 . Check phototransistor input wiring - refer to page 57- 16- 11 .
2. Channel board . I
2. Replace channe I board. 1 3. Clock board .
I 3. Replace clock board.
I
1. Thumbwheel calibration. 1 . Check intial set-up instructions for proper thumbwheel ca libra- tion - refer to page 57-l 6- 12.
2. Compensation setting. 2. Check intial set-up - refer to page 57-16-12.
I
3. Thumbwheel switches. 3. Check thumbwheel switches - refer to page 57-l 6- 20.
4. Channel board. I
4. Replace channel board. I
5. Clock board. I ~~
5. Replace clock board.
LED(s) damaged. Replace LED(s).
1. Slippage of object on conveyor Ii ne .
1. Check and remedy.
2. S lippage in drive for the conveyor.
2. Check and remedy.
3. S lippage in drive to the incrementa I encoder.
3. Check and remedy.
4. Dirt on phototransistor lens .
5. Air pressure to gun solenoid .
4. C lean phototransistor lens.
5. Check and remedy.
LlTHO U.S.A,
ISSUED 9/79 SUPERSEDES
5 7- 16 - 2 0 0 Nordson CORPORATION /Amherst. Ohio 44001
TROUBLESHOOTING, (Continued)
TECHNICAl PUBLICATION
Shut off power to the CT-9 before opening the control cabinet. Use the disconnect ahead of the CT-9. Conduct all continuity and resistance checks with the power off.
A The CT-9 should be serviced only by qualified personnel who are familiar with the normal hazards associated with the operation and troubleshooting of this type of equipment.
To Check Thumbwheel Switches
Use a multimeter to check continuity. Clip one probe onto the pin marked (C). Clip the other probe onto the pin marked (1). Refer to chart on page 57-116-22. If below the dial number on chart is a black dot then continuity should read less than 1 Ohm. If not, then continuity should read infinity. Check all settings. Move the probe ,that was on (1) to (2) and follow above directions, then move probe to (4), and finally (8). If any one gives a false reading, switch is bad.
To Check Power Supplies (refer to figure 14, page 57-16-216 for visual orientation)
A. 12 VDC Power Supply Check:
Step 1: Turn power on.
Step 2: Set VOM to 50 VAC range.
Step 3: Place positive lead on TBl-16 and negative lead on TBl-15. Meter should read 12 VDC + 1 V.
Step 4; If meter reading is correct, 12 VDC power supply is operating. Go to 6.3 VAC power supply check.
Step 5: If meter reading is incorrect check for 18 VDC f 3V at 3300 MFD capacitor, Key No. 13.
Step 6: If meter reading is correct at the capacitor, replace power supply board, Key No. 8, and repeat step 3.
Step 7: If meter reading is incorrect at the capacitor, replace the transformer, Key No. 11, and repeat step 3.
B. 6.3 VAC Power Supply Check:
Step 1: Turn power on.
Step 2: Set VOM to 20 VAC range.
Step 3: Place probes between TBl-9 and TBl-10 meter should read 6.3 VAC f 1 V.
Step 4: If meter reading is incorrect, replace the transformer, Key No. 11, and repeat step 3.
ISSUED 9/79 SUPERSEDES LITHO U.S.A.
0 Nordson CORPORATION /Amherst, ohlo 44001
TROUBLESHOOTING, (continued)
c. 24 VDC Power Supply Check:
Step 1:
Step 2:
Step 3:
Step 4:
Step 5:
Step 6:
Step 7:
Step 8:
Step
Step
Step
Step 12:
Step 13:
TECHNICAL PUB1 /CATION !i 7 - 16 - 2 1
Turn power on.
Set VOM to 50 VDC range.
Place positive lead of VOM on TBl-2 and negative lead on TBl-15. Meter should read 25 VDC f 2 V I#
If meter is correct, trigger timer.
If meter reading is still correct, 24 VDC power supply is operating.
If meter reading is between 0 VAC and 1 .5 VAC, there is a short on the solenoid output. Correct the short and repeat step 3.
If meter reading is incorrect, check for 45 VDC f 5 V at 2900 MFD
capacitor, Key No. 14.
If meter reading is correct at the capacitor, replace power supply board, Key No. 8, and repeat step 3.
If meter reading is incorrect at the capacitor, remove red leads from the full wave bridge, Key No. 12.
Set VOM to 100 VAC range.
Place probes across red leads and check for 30 VAC + 3 V.
If meter reading is incorrect, replace the transformer, Key No. 11, and repeat step 3.
If meter reading is correct, replace the full wave bridge, Key No. 12,
repeat step 3.
To Check the Gun Solenoid for Proper Resistance
1. Shut off power to the CT-9.
2. Remove solenoid lead wires from terminals #l,, 2, 3, 4, 5, 6, 7 and 8 on TBl .
3. Check for proper resistance across each solenoid coi I. See page 57-l-l for data. Replace the solenoid if necessary.
To Check the Photosensor/Light Source
Confirm the photosensor and light source alignment.
1. Attach a voltmeter to the phtotransistor receiver.
a. The voltmeter’s positive lead should be on the receiver’s red wire.
b. The voltmeter’s negative lead should be on the receiver’s black wire.
2. Turn the CT-9 power on.
3. Align the phototransistor receiver and light source for the lowest possible reading ( less than 1 .O volts).
LfTHO U S.A. ISSUED 9/79 SUPERSEDES COPYRIGHT<3 1979 NORDSON
5 7- 16 - 2 2 0 Nordson CORPORATION /Amherst, Ohio 44001 TECHNICAL PUBLICATION
BCD
I I I.
lo 01
Figure 10 - Thumbwheel Switch Troubleshooting Reference Chart
ISSUED T/79 LITHO U.S.A.
SUPERSEDES
0 Nordson CORPORATION / Amherst. Ohio 44001 TECHNICAL PUBLICATION 5 7- 16 - 2 3
GHOI _ GnO2
‘b+iRED FOR 120 Y
S6.E AL TERNATE coNNLT;r/ONS BELOh
I 1 /‘ I
I
AC
J3
&I- ITOoGNNgDooSR~UD
78-3 T..A!VJ
/NFb’T SIGNAL fXOM TilCH * ~ I I I I I I
PSOOMFD) (8+ I ‘jl
J2
7b-2
24Oi'
TB-2
Figure 11 - CT-9 Wiring Diagram
LITHO U.S A, ISSUED 9/79 SUPERSEDES COPYRIGHT 0 1979 NORDSON
57-16-24 0 Nodson CORPORATION / Amhersr. Ohio 4'4001 TECHNICAL PUBLICATION
Figure 12 - CT-9 Control System
Fig. 12 Part Number Key 1 Channel 2 Channel 3 Channei 4 Channel Description Req’d.
295 151 295 152 295 153 295 154 CT-9 Control S stem, 100 VAC Ref. 1 295 135 295 136 295 137 295 138 ’ CT-9 Digita r Interval Control, 1
1OOVAC 2 295 170 295 170 295 170 295 170 . Incrementa I Encoder 1 3 937 119 937 119 937 119 937 119 4 937 191 937 191 937 191 937 191 1
. Light Source 1
. P hotosensor 1
1
2 3 4
1
2 3 4
1
2 3 4
295 155 295 156 295 157 295 158 CT-9 Control S stem, 120 VAC Ref. 295 139 295 140 295 141 295 142 ’ CT-9 Digita r Interval Control, 1
120 VAC 295 170 295 170 295 170 295 170 . Incrementa I Encoder 1 937 119 937 119 937 119 937 119 . Light Source 1 937 191 937 191 937 191 937 191 . P hotosensor 1
295 159 295 160 295 161 295 162 CT-9 Control System, 200 VAC Ref. 295 143 295 144 295 145 295 146 ’ CT-9 Digital Interval Control, 1
200 VAC 295 170 295 170 295 170 295 170 . Incrementa I Encoder 1 937 119 937 119 937 119 937 119 . Light Source 1 937 191 937 191 937 191 937 191 . P hotosensor 1
295 163 295 164 295 165 295 166 CT-9 Control System, 240 VAC Ref. 295 147 295 148 295 149 295 150 ’ CT-9 Digital Interval Control, 1
240 VAC 295 170 295 170 295 170 295 170 . Incrementa 1 Encoder 1 937 119 937 119 937 119 937 119 . Light Source 1 937 191 937 191 937 191 937 191 . P hotosensor 1
ISSUED 9/79 SUPERSEDES LITHO U.S.A.
CORPORATION / Amherst. Ohio 44001 TECHNICAL PUBLICATION 57-16-25
,5.6
-2
-1
A
Figure 13 - CT-9 Control Cabinet (Front)
Fig. 13
Key Part No. Description Req’d.
CT-9 Digita I lnterva I Control Ref. 1 937 188 Switch, Toggle 1 2 939 180 : Lamp, Indicator (Unit On) 1
3 939 119 4
Fuse, 2-l/2 Am Fast Acting 1 Switch, Thumbw
R ‘eel (See Channel Board)
1
5 242 687 . Latch, Cabinet 2 6 981 247 . Screw w/Nylock, l/4-28 x 5/8 2
57-16-26 0 N&son CORPORATION / Amhersr. Ohio 44'001 TECHNICAL PUBLICATION
Fig. 14
Key
1 2 3 4 5 6 7 8 9
10
11 12 13 14
DRIVER BOARD FOR CHANNELS $3 8 4 POSITIONED HERE (I
\ 18 DRIVER BOARD
7 FOR
3
Part No. Description Req’d.
933 161 295 191 295 182
CT-9 Digital lnterva I Control . Post, Fuse
Tag, Wiring Instruction (Not Shown) : C’ rrcuit Board, Channel, CT-9, w/ Thumbwheel
Cable, Ribbon, w/Connectors Switches
295 180 295 178 295 181 295 183 295 192 939 230 900 298 295 186 939 256 939 254 939 224
: Circuit Board, Clock, CT-9 . Circuit Board, Mother, CT-9 . Circuit Board, Driver, CT-9 . Circuit Board, Power Supply
. Tag, Wiring, Terminal Strip (Not Shown)
. Transistor
. Compound, Heat Sink, 1 oz.* Transformer, Power, CT-9, w/Harness
: Bridge, Rectifier, Ful I Wave . Capacitor, 3300 MFD . Capacitor, 2900 MFD
Ref. 1 1
As Req’d . As Req’d .
1 1
1 or 2 1 1 1 1 1 1 1 1
Figure 14 - CT-9 Control Cabinet (Inside)
* Heat sink compound, P/N 900 298 should be placed on the face of the replacement transistor BEFORE securing it to the heat sink.
ISSUED 9/79 SUPERSEDES LITHO U.S.A.
0 Nordson CORPORATION /Amherst. Ohio 44001 TECHNICAL PUBLICATION !i 7- 16 - 2 7
RECOMMENDED SPARE PARTS LIST
Fig/Key Part No. Description Qt Y
12/2 295 170 Encoder, Incremental 1 12/3 937 119 12/4
Light Source 1 937 191 Phototransistor 1
13/2 939 180 Lamp, Indicator ( Unit On ) 1 13/3 939 119 14/3
Fuse, 2-l/2 Amp, Fast Acting 1 295 182 Circuit Board, Channel, CT-9, w/ Thumbwheel 1
Switches 14/4 Cable, Ribbon, w/ Connectors 1 14/5 295 180 Circuit Board, Clock, CT-9 1 w 295 181 Circuit Board, Driver,, CT-9 1 14/8 295 183 Circuit Board, Power Supply 1 14/10 939 230 Transistor 1
900 298 Compound, Heat Sink, 1 oz. 1 14/12 939 256 Bridge, Rectifier, Full Wave 1 14/13 939 254 14/14
Capacitor, 3300 MFD 1 939 224 Capacitor, 2900 MFD 1
LITHO U.S.A. ISSUED 9/79 SUPERSEDES COPYRIGHT 0 1979 NORDSCN
