Time Interval Control

Transcription

1 Time Interval Control Model CT-6 Part 4 495A NORDSON CORPORATION. AMHERST, OHIO. USA

2 Corporation welcomes requests for information, comments and inquiries about its products. Address all correspondence to Corporation 475 Lakefield Drive Duluth, GA 336 Notice This is a 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 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,, the logo, OmniScan, Porous Coat, Posi-Stop, RBX, Sure-Bond, UniScan, UpTime, and Versa-Spray are registered trademarks of Corporation. BetterBooksM, CF, Controlled Fiberization, Easy-Screen, Fibermelt, Flo-Tracker, PrintGuard, and Package of Values are trademarks of Corporation. Manual A Issued 5/88 Q 988 Corporation All Ftlghts

3 Atlanta, Georgia TECHNICAL PUB ICATION TABLE OF CONTENTS Section Page LIST OF ILLUSTRATIONS SAFETY SUMMARY... 4-l-l EQUIPMENT FAMILIARIZATION.... Functional Description Feature Variations and Options.... Special Versions.... Specifications II III PREPARATION FOR USE.... Introduction... Unpacking... Inspection Installation'o; Timer Electrical Installation... Trigger Installation.... Light Source and Phototransistor Pair.... Other Triggers... Gun Installation g/ 57-3-g/ OPERATING INSTRUCTIONS.... e.... e Setup and Initial Operation Determination of Bead Pattern Calculation of Time Intervals ; Selection of Time Ranges. m Setting of Time Intervals Daily Operation..... e /6 IV MAINTENANCE... Introduc;ion'... Preventive Maintenance: Corrective Maintenance.... Troubleshooting Chart Summary. o Troublechooting Chart.... Disassembly and Repair V ILLUSTRATED PARTS LIST a.... o... s Recommended Spare Parts ISSUED 484 SUPERSEDES NORDSON CORPORATION 984

4 Atlanta, Georgia TECHNICAL PUB ICATION LIST OF ILLUSTRATIONS Figure Number Title Model CT-6 Time Interval Control... Model CT-6 Dimensions Minimum and Maximum Bead Length vs. Conveyor Speed.... Wiring Diagram for TBl... Trigger Input Connections.... Parallel Bead Pattern.... Staggered Bead Pattern... Typical Breaklight-Mode Operation... Location of Time-Range Switches on Circuit Board.... Ten-turn Potentiometers.... CT-6 Wiring Diagram.... CT-6 Time Interval Control... Inside View of CT-6 Control Cabinet... Page ISSUED NORDSON CORPORATION 984 All Rtghts

5 Atlanta, Georgia TECHNICAL PUB ICATION p SECTION I EQUIPMENT FAMILIARIZATION I DELAY. DURATION TIME INTERVAL CONTROL a Figure - Model CT-6 Time Interval Control The Model CT-6 Time Interval Control is a solid-state "delay-duration" timing device for use in case-sealing, carton-sealing, and other packaging operations. It consists of two timers, one which determines the length of the delay period and one which determines the length of the duration (or adhesive deposit) period. The location and length of the adhesive bead can be easily changed for different applications by resetting the delay and duration dials on the front of the timer. The CT-6 can control the output of up to four soleniod-operated guns, each of which will produce an adhesive bead of the same length. It is ideal for applications requiring fast, accurate placement of basic bead patterns at constant line speeds. FUNCTIONAL DESCRIPTION During operation a trigger device (e.g., a limit switch, photosensor, proximity switch, or infrared device) senses the approach of the substrate (a carton, a case, etc.) and sends a signal to the delay timer, starting the delay interval. When the area targeted for adhesive is directly below (or opposite) the solenoidoperated gun(s), the pre-set delay interval ends and a signal to the ISSUED 484 SUPERSEDES NORDSON CORPORATION 984

6 Atlanta, Georgia TECHNICAl PUB ICATION duration timer begins the duration interval. The duration period continues until a bead of the pre-set length has been deposited on the substrate. At this time the controller ends the duration interval by interrupting the signal to the soleniod(s), thereby shutting off the flow of adhesive. FEATURE VARIATIONS AND OPTIONS The CT-6 is available in four input voltage ratings.* It may be ordered with or without a photosensor pair: (w/photosensor Pair) (w/o Photosensor Pair) Rating P/N Rating P/N OOVAC 295 OOVAC VAC VAC VAC OVAC VAC VAC SPECIAL VERSIONS The CT-6 is also available with an extended high range of 4-2 milliseconds for applications with low line speeds and/or long bead lengths (low range is 4-2 milliseconds): (w/photosensor Pair) (w/o Photosensor Pair) Rating P/N Rating P/N OOVAC OOVAC OVAC VAC VAC VAC OVAC OVAC * The CT-6 Timer should not be field converted from one voltage to another. SPECIFICATIONS** MODEL CT-6 TIME INTERVAL CONTROL Dimensions See Figure 2 Time Ranges Low Range High Range Minimum and Maximum Bead Length Repeat Accuracy Error 2- milliseconds 2- milliseconds See Figure 3 Less than &l/4% of set time ** Due to possible technological and/or quality improvements, equipment specifications are subject to change without notice. ISSUED 484 SUPERSEDES NORDSON CORPORATION 984

7 Packaging and Assembly Dwwon Atlanta, Georgia TECHNICAL PUB ICATION Temperature Drift Less than +2% from 32F( )to 4 F(6) Operating Temperature Range 32F(O") to 4 (6) Electrical Output Operates up to four 24Vdc solenoids provided the maximum current draw of each solenoid does not exceed.4 amperes or the total current draw does not exceed.6 amperes. Skinner 24Vdc solenoids meet this requirement but MAC soleniods (. ampere current draw) do not. Only one MAC solenoid may be used with the CT-6 Timer. Electrical Requirements VAC, 5/6 Hz, Phase 2 VAC, 5/6 Hz, Phase 2 VAC, 5/6 Hz, Phase 24 VAC, 5/6 Hz, Phase A..5 in. (292. mm) B. 8. in. (23.2 mm) C in. (. mm) D..75 in. (273. mm) E. 6. in. (52.4 mm) Figure 2 - Model CT-6 Dimensions ISSUED 484 SUPERSEDES 875 Q NORDSON CORPORATlOFv 984

8 PackagIng and Assembly OwlsIon Atlanta, Georgia TECHNICAL PUB ICATION 24 6 t-. 3 z Yt; ; E.6 mu r LINE SPEED (FEET/MINUTE) LINE SPEED (METERS/MINUTE).6 - ( III III IllI LINE SPEED (FEET/MINUTE) LINE SPEED (METERS/MINUTE) Figure 3 - Minimum and Maximum Bead Length vs. Conveyor Speed (Standard and Metric Units) ISSUED 4/84 SUPERSEDES 777 q NORDSON CORPORATION 984 All Rtghts

9 Atlanta, Georgia TECHNICAL PUBLICATION SECTION II PREPARATION FOR USE INTRODUCTION This section describes the procedure for unpacking, inspecting, and installing the CT-6 Time Interval Control, UNPACKING Carefully remove the CT-6 Control and the photosensor components from their shipping containers. Handle all equipment with care. Do not drop the components, expose them to intense heat, intense vibration, strong magnetic fields, or moisture. Store al. packing materials in a safe place. They should be used if it becomes necessary to return the equipment for repair. INSPECTION After unpacking the CT-6:. Inspect all components for dents, scratches, or other evidence of damage. 2. Open the CT-6 cabinet door by loosening the screws on the retaining clips. Check for broken wires and loose connections. INSTAILATION OF TIMER. The CT-6 should be mounted in a location free from excessive vibration, temperature extremes, or other adverse conditions. If the unit is subject to excessive vibration from the packaging line, vibration insulators (not supplied with unit) should be used on the mounting brackets or the unit should be mounted separately near the conveyor line. Do not install the CT-6 inside another enclosure, directly above the hot melt applicator, or in any position where high temperatures may affect the unit's performance. Do not install the unit where it will be exposed to excessive moisture, strong magnetic fields, large amounts of dust, other foreign matter, or corrosive substances. ISSUED 4/84 U.S.A, SUPERSEDES NORDSON CORPORATION 984

10 Atlanta, Georgia TECHNICAl PUB ICATION 2. If the unit is mounted separately, it should be located as close the the line as possible to minimize electrical noise pickup through the input and output cables. 3. The unit should be mounted so that the controls are readily accessible and the door to the cabinet can be opened completely. ELECTRICAL INSTALLATION -- The CT-6 Time Interval Control contains electrical potentials that are dangerous and can be fatal. Exercise extreme caution when installing, operating, and servicing this equipment. Only qualified personnel should install and service the CT-6. A 'I To prevent electrical shock during installation and servicing, recommends installation of a lockout type circuit breaker or fused disconnect switch in the service line ahead of the control unit. This is mandatory where required by local electrical codes.. Loosen the screws on both retaining clips at the right side of the cabinet door. Slide the clips away from the door flange and open the door for access to terminal block TBl. 2. Route the electrical input line (, 5, 2, or 23 VAC service line) through the cord connector holes provided on the side of the cabinet and connect the power leads to terminals and 2 on the terminal block (see Figure 4). Connect the ground wire to terminal 3. NOTE: NOTE: The CT-6 must be grounded properly for the solenoid to function. The electrical circuit in the solenoid includes a connection to ground. Do not wire the CT-6 through the main power switch on a parent machine. Shutting the timer down by means of a switch other than the one on the front panel will cause it to cycle after power has been turned off. inzi[;li + TO LIGHT & TRIGGER SOURCE \ 26 Ll GND INPUT t6.3~~~) SOLENOID CONNECTIONS Figure 4- Wiring Diagram for TBl ISSUE 4/84 SUPERSEDES 8 / 7 5 NORDSON CORPORATION 984

11 Atlanta, Georgia TECHNICAL PUB ICATION 5 7 _ 3 _ 7 3. Connect the phototransistor receiver to the terminal board by one of the following procedures. a. For breaklight mode, connect the black receiver lead wire to terminal 4 and the red receiver lead wire to terminal 5. Then connect the cable shield to terminal 4 (see Figure 5). b. For makelight mode, connect the black receiver lead wire to terminal 4 and the red receiver lead wire to terminal 6. Then install a jumper across terminals 4 and 5 (see Figure 5). Finally, connect the cable shield to terminal 4. NOTE: Ground the cable shield by connecting the shield wire only at terminal 4. Grounding the shield at both ends creates a ground loop, which may cause false triggering. If a limit switch is used as the triggering device, follow the procedure described in step 3a for a normally closed switch and the procedure described in step 3b for a normally open switch. Here again, ground the cable shield at terminal 4 but not at the switch. 4. Connect the light source electrical leads to terminals 7 and 8. PHOTOSENSOR BREAKLIGHT MODE (N.C. SWITCH) PHOTOSENSOR MAKELIGHT MODE (N.O. SWITCH) BL BL TO PHOTOSENSOR RECEIVER TO PHOTOSENSOR RECEIVER NOTE: NO JUMPER BETWEEN 4&5 NOTE: JUMPER MUST BE INSTALLED BETWEEN 485 Figure 5 - Trigger Input Connections ISSUED 4/84 SUPERSEDES NORDSON CORPORATION 964

12 Nordssn Atlanta, Georgia TECHNICAL PURL ICATION 5. Connect the gun solenoid leads to the terminal board according to the following chart: Gun No. Connect Leads to Terminals 9 and 2* 9 and 3* and 2 4* and 2 * If more than two guns are used, the total current draw should not exceed.6 amperes (see requirements for electrical output listed in Section I under Specifications). Do not short or jumper terminals 9,,, and 2. TRIGGER INSTALLATION The trigger must be securely mounted and located so that each substrate will initiate its own timed sequence as it passes the trigger on its way to the guns. In general, the trigger should be located as close to the gun installation as possible to minimize the effect of slippage between the substrate and the line. However, it should not be located so close that it will be exposed to splashed adhesive from the guns. Light Source and Phototransistor Pair The light source and phototransistor should be mounted so that the passing substrate will interrupt the light beam between the two modules. Choose an area where strong ambient light will not affect the phototransistor and where dust, paper fiber, and other foreign material will not cover the light source or receiver. If possible, the light source should be below the substrate and aimed upward toward the phototransistor to reduce false signals from ambient lighting. For best results, the light source and phototransistor should be as close together as possible, especially in high speed applications. Under no conditions should the two be more than 5 ft (.5 m) apart. To connect the light source and phototransistor pair:. Select a suitable location for the trigger point, install the necessary mounting hardware, and bring the pair into rough alignment visually. 2. Make sure electrical connections have been completed according to the instructions for electrical installation in this section. 3. Switch on external power to the CT-~ control and turn the unit on at the circuit breaker on the front panel. The front panel indicator lamp should glow, and the light source should come on. ISSUED 484 SUPERSEDES NORDSON CORPORATION 984

13 Atlanta, Georgia TECHNICAL PUB ICATION g / 4. Use a piece of black cardboard placed in front of the phototransistor to check for proper alignment of the light source. If necessary, adjust the light source until the beam of light shines directly into the phototransistor receiver. 5. As a final check for alignment, switch the CT-6 off at the front panel. Attach the positive lead of a voltmeter to the receiver's red lead. Attach the negative lead of the voltmeter to the receiver's black lead. Next, turn the CT-6 on at the front panel. Align the phototransistor receiver and light source to obtain the lowest possible voltage reading (less than.5 volts). 6. Fasten both the phototransistor and the light source securely. Other Triggers In general, the trigger mechanism must be securely mounted on the conveyor line and located as close to the gun as possible. However, it should not be located so close to the gun that it will be exposed to splashed adhesive. Allow for some adjustment in the switch mounting to facilitate bead positioning. GUN INSTALLATION All guns must be mounted securely and located the same distance from the substrate. In applications with pneumatically actuated guns, the solenoid valves should be located as close to the guns as possible to minimize mechanical delays in activating and deactivating the guns. Air pressure to the solenoids should be 5-7 psig (34-48 kpa) and the air supply lines and fittings must be free of leaks and/or restrictions that would affect gun actuation time. NOTE: Use only 24Vdc solenoids. Dual voltage solenoids--for example, 2 VAC/24 Vdc-- have different operating characteristics from single voltage solenoids and may operate erratically in high speed applications. The CT-6 is now ready for initial operation. Refer to SECTION III, OPERATING INSTRUCTIONS. ISSUED 4/84 U.S.A, NORDSON CORPORATION 984

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15 Packaging and Assembly Divwon Atlanta, Georgia TECHNICAL PURL ICATION SECTION III OPERATING INSTRUCTIONS SETUP AND INITIAL OPERATION The following procedures apply only to initial operation of the CT-6. For normal daily operation, refer to the instructions at the end of Section III under DAILY OPERATION. DETERMINATION OF BEAD PATTERN The CT-6 Timer is capable of producing several basic bead patterns. Since it can operate up to four guns, it can produce up to four beads of the same length (different bead lengths are not possible with the CT-6). If four guns are all mounted at the same point on the conveyor line, they will produce a parallel pattern like that shown in Figure 6: BEAD FROM GUN BEAD FROM GUN 2 BEAD FROM GUN 3 BEAD FROM GUN 4 Figure 6 - Parallel Bead Pattern By staggering the locations of the guns, various bead patterns can be obtained. One of many possible patterns is shown in Figure 7 (below). Here again, all of the beads will be the same length. Also, it should be remembered that the bead pattern cannot be changed for different applications without changing the location of the guns. BEAD FROM GUN BEAD FROM GUN 3 BEAD FROM GUN 2 BEAD FROM GUN 4 Figure 7 - Staggered Bead Pattern ISSUED 4/84 SUPERSEDES NORDSON CORPORATION 984

16 Packaging and Assembly D/vision Atlanta, Georgia TECHNICAL PURL /CATION CALCULATION OF TIME INTERVALS No matter how many guns the timer operates, the time intervals are calculated for the placement of only one bead. To produce a staggered bead pattern as in Figure 7, one bead is chosen as a reference bead for the setup calculations. After the timer is set up to produce this bead, the position of the other beads may be varied only by varying the locations of the guns on the conveyor line. In other words, the placement of the guns determines the placement of the beads.. In order to calculate the delay and duration time intervals, it is necessary to know two distance measurements: the distance the substrate travels on the line during the delay interval and the distance it travels during the duration interval. These two distances, the "delay-interval distance" and the 'duration-interval distance,' are shown for a typical breaklight mode operation in Figure 8. (For makelight-mode operation, the "delay-interval distance" would be the distance between the trigger and the trailing edge of the case. The "durationinterval distance" would be the same as for operation in the breaklight mode.) DELAY-INTERVAL DISTANCE TRIGGER DEVICE \ I DURATION- INTERVAL DISTANCE ; DESIRED LENGHT AND I I LOCATION I I I I OF BEAD J r B I -GUN CONVEYOR LINE I DIRECTION OF TRAVEL Figure 8 Typical Breaklight-Mode Operation 2. After measuring the two required distances, use the following equation to convert them to time intervals in milliseconds: Interval (ms) = 5 x Interval Distance (inches) Line Speed (feet per minute) If, for example, the delay-interval distance is inches and ISSUED 484 SUPERSEDES NORDSON CORPORATION 984

17 Packaging and Assembly Dlvislon Atlanta. Georgia TECHNICAL PURL ICATION the line speed is 25 feet/minute, the delay interval will be 2 ms. For metric system installations, use the following equation: Interval (ms) = 6 x Interval Distance (millimeters) Line Speed (meters per minute) SELECTION OF TIME RANGES Once the time intervals have been determined, the time ranges must be set for either high range or low range. In general, the low range should be used for intervals of milliseconds or less, and the high range for intervals between and milliseconds. The switches for setting the time ranges for the delay and duration time intervals are located on the printed circuit board. In Figure 9 they are identified as A and B. BOARD PLUGS RANGE SWITCHES / Figure 9 - Location of Time Range Switches on Circuit Board Switch A (at the lower end of the board) selects the delay timing range. Switch B (located above switch A and toward the center of the board) selects the duration timing range. To select the low range for a time interval, move the controlling switch toward the rear of the cabinet (away from you). To select the high range for a time interval, move the controlling switch toward the front of the cabinet (toward you). ISSUED 484 U.S A. SUPERSEDES NORDSON CORPORATION 984

18 PackagIng and Assembly Dwlslon Atlanta, Georgia TECHNICAL PUB ICATION SETTING OF TIME INTERVALS The two ten-turn potentiometers on the cabinet face of the CT-6 are used to set the time intervals in milliseconds. They are shown in Figure below: KNOB DELAY WHOLE NUMBER INDICATOR DURATION LOCKING DEVICE POINTER DECIMAL INDICATOR II OUTPUT Figure - Ten-turn Potentiometers The dial on the left, as the label on the cabinet face indicates, sets the delay interval. The dial on the right sets the duration interval. To set the dials:. Nake sure the locking device is moved counterclockwise to the unlocked position. 2. Convert the time interval to a dial setting by dividing it by if it falls in the low range or by if it falls in the high range: Example: milliseconds = low range = = 4.5 Example: milliseconds = high range = = Turn the dials clockwise to increase dial settings. Turn them counterclockwise to decrease settings. Assume, for example, that the present setting is 7.6 and the desired setting is First, turn the dial counterclockwise until the number above the pointer (see Figure 9 for location of pointer) reads3. Then turn the dial clockwise until the dial below the pointer reads 85. ISSUED 4/84 SUPERSEDES NORDSON CORPORATION 984

19 Atlanta, Georgia TECHNICAL PUB ICATION / 6 4. Lock in the dial setting by moving the locking device clockwise. 5. Set both the delay and the duration intervals in this way. The CT-6 Time Interval Control is now ready for daily operation. DAILY OPIGWTION Once the CT-6 has been installed and set up properly, no further adjustments are required unless changes in bead patterns, line speed, or substrate size necessitate resetting the unit's controls. For normal daily operation, it is necessary only to turn the unit on at the beginning of a production run and off when it will not be in use for an extended period of time. When the unit is turned on, the indicator light on the front of the cabinet should glow. ISSUED 4/84 U.S.A> NORDSON CORPORATION 984

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21 Atlanta, Georgia TECHNICAL PUB ICATION SECTION IV MAINTENANCE INTRODUCTION The following section contains information on preventive and corrective maintenance associated with the CT-6. This information includes troubleshooting procedures to be utilized should problems arise. PREVENTIVE MAINTENANCE Like all solid state devices, the CT-6 Time Interval Control requires little periodic maintenance. The unit should be checked on a regular basis for loose or missing hardware, frayed or pinched cables, and physical damage to the components. In applications where the CT-6 is exposed to adverse environmental conditions -- i.e., large amounts of dust, moisture, and airborne material -- the cabinet, cables, and other components should be wiped down as a part of regular plant maintenance procedures. Do not hose down the unit. NOTE: Satisfactory performance of the CT-6 Timer depends on proper maintenance of the applicator, hoses, and guns. Refer to the appropriate equipment manual(s) for recommended preventive maintenance procedures. CORRECTIVE MAINTENANCE Mechanical Troubleshooting Mechanical maintenance and troubleshooting of the CT-6 system are essentially limited to components other than the timer unit. In case of trouble, check first for proper air pressure at the guns and solenoids, absence of clogging in the gun nozzles, and proper functioning of the triggering device. Electrical Troubleshooting Due to the reliability of solid state componentry used in the CT-6, troubleshooting is usually confined to electrical testing of the unit. The procedures described in the following pages may be used in identifying and correcting electrical problems with the CT-6. ISSUED 4/84 NORDSON CORPORATION 984

22 Atlanta, Georgia TECHNICAL PUB ICATION A fi The CT-6 Time Interval Control contains electrical potentials that are dangerous and can be fatal. Only qualified personnel should perform maintenance on this unit. Shut off and lock out external power to the CT-6 before opening the control cabinet. Conduct all continuity and resistance checks with the power off. When performing voltage checks with the power on, use extreme caution and observe all normal electrical safety procedures. TROUBLESHOOTING CHART SUMMARY FAULT CONDITION POSSIBLE CAUSE REFERENCE EXTERNAL POWER ON, FRONT PANEL SWITCH ON, POWER INDICATOR OFF FRONT PANEL SWITCH TRIPS AND CANNOT BE RESET GUNS NOT FIRING BUT OUTPUT LAMP FLASHES Loss of input power Defective front panel switch Faulty input power connections Defective lamp Short circuit in external components Defective filter capacitor Defective transformer Defective circuit board Cold hose(s) or gun(s), clogged gun nozzle(s), no adhesive in tank, or other external problems Faulty gun solenoid connections Defective gun solenoid coil No output voltage to solenoid Defective transformer Defective circuit board Al A2 A3 A3 Bl and B2 B3 B4 B4 Cl c2 c3 c4 c5 c5 ISSUED 4/84 NORDSON CORPORATION 984 All Rtghts

23 Atlanta, Georgia TECHNICAl PUB ICATION g FAULT CONDITION POSSIBLE CAUSE REFERENCE GUNS NOT FIRING AND OUTPUT LAMP NOT FLASHING GUN(S) FIRING ERRATICALLY TIMER CYCLES AFTER POWER IS TURNED OFF Defective output lamp Blown fuse on circuit board Defective slide switches Faulty trigger input connections Incorrect voltage to trigger Misaligned photosensor pair Defective transformer Defective potentiometers Defective power transistor Defective circuit board Problem in trigger device Defective potentiometers Defective gun-solenoid coil Defective circuit board Faulty shut-down procedures Defective front panel switch Dl D2 D3 D4 D5 D6 D7 D8 D9 D9 El E2 E3 E4 Fl F2 ISSUED 484 NORDSON CORPORATION 984 All Rtqhts

24 Atlanta. Georgia TECHNICAL PUBLICATION TROUBLESHOOTING CHART EXTERNAL POWER ON, FRONT PANEL SWITCH ON, POWER INDICATOR OFF Al. Check input power voltage.. Turn power to unit on at external power supply and at switch on front panel of CT Set VOM to 25 VAC range. 3. Place probes on TBl- and TBl-2. NORMAL INDICATION: Meter reading agrees (*lo%) with power requirements of unit. Proceed to next step. ABNORMAL INDICATION: Check power supply. A2. Check front panel switch for continuity.. Turn off power to unit at external power supply. 2. Check front panel switch for continuity. NORMAL INDICATION: Switch shows continuity. Proceed to next step. ABNORMAL INDICATION: Switch shows no continuity. Replace front panel switch/ circuit breaker. A3. Check input power connections. NORMAL INDICATION: Connections tight with no broken or exposed wiring. Replace lamp. ABNORMAL INDICATION: Tighten loose connections and/or replace faulty wiring. Resume operation. FRONT PANEL SWITCH TRIPS AND CANNOT BE RESET Bl. Check for short circuit in interconnection cables and other external components.. 2. Remove leads from terminals 4 through 2 on TBl. Turn unit on at external power supply and front panel switch. NORMAL INDICATION: Timer ABNORMAL INDICATION: Timer switch stays on when reset. switch cannot be reset. Go Go to next step. to Step B3. B2. Check external components one by one.. Turn unit off and reconnect the leads one at a time, beginning with leads from the trigger and working toward the guns. ISSUED 484 NORDSON CORPORATION 984

25 Atlanta, Georgia TECHNICAL PUB ICATION p 2. Retest the timer switch after connecting each lead. NORMAL INDICATION: Timer switch stays on. Proceed to next step. ABNORMAL INDICATION: Timer switch cannot be reset. Repair short in faulty component or replace component. B3. Check filter capacitor.. Disconnect the lead (wire 2) from the positive terminal of the filter capacitor (see Figures and 3). 2. Turn unit on at front panel switch. NORMAL INDICATION: Switch trips off. Go to next step. ABNORMAL INDICATION: Switch stays on. Replace filter capacitor. B4. Check transformer.. Disconnect the black and the black/yellow wires to the transformer. 2. Read resistance across these two wires. 3. Disconnect the blue/green and the black/red wires to the transformer. 4. Read resistance across these two wires. NORMAL INDICATION: The first reading should be 5.8 ohms (2%). The second should be 6.5 ohms (&lo%). Replace circuit board ABNORMAL INDICATION: Replace transformer and resume operation. NOTE: Parts for the circuit board cannot be ordered. A new circuit board must be installed. GUNS NOT FIRING BUT OUTPUT LIGHT FLASHES Cl. Check for clogged gun nozzles, cold hoses or guns, and other problems with the hot melt equipment or air supply to guns. NORMAL INDICATION: No indication of problems with equipment external to timer. Go to next step. ABNORMAL INDICATION: Resolve problem and resume operation. c2. Check gun solenoid connections (terminals 9,,, and 2, on TBl). NORMAL INDICATION: Connections tight with no broken or exposed wiring. Proceed to next step. ABNORMAL INDICATION: Tighten loose connections and/ or replace faulty wiring. lssued 4/84 NORDSON CORPORATION 984

26 Atlanta, Georgia TECHNICAL PUB ICATION c3. Check resistance of gun solenoid coil.. Turn power to unit off. 2. Disconnect the solenoid leads from terminals 9 and and (if more than two guns are used) terminals and 2 on TBl. 3. Read resistance across each pair of leads connected to terminals 9 and and to terminals and 2. NORMAL INDICATION: Resistance reading for each gun agrees with specifications given on 57-l-l. Go to next step. ABNORMAL INDICATION: Replace solenoid. c4. Check output voltage to gun solenoid.. Attach the probes of a voltmeter to terminal 9 on TBl and the ground stud at the top of the cabinet. 2. Turn on power to the unit. 3. Trigger the timer. 4. Repeat test across terminal and the ground stud if more than two guns are used. NORMAL INDICATION: Voltmeter reads between 24 and 3 Vdc. Go to next step. ABNORMAL INDICATION: Replace circuit board. c5. Check transformer secondary (see instructions at Step D7.) NORMAL INDICATION: Replace circuit board (see note at Step B4). ABNORMAL INDICATION: Relace transformer and resume normal operation. GUNS NOT FIRING AND OUTPUT LIGHT NOT FLASHING Dl. Check output light for continuity. NORMAL INDICATION: Light shows continuity. Proceed to next step. ABNORMAL INDICATION: Light shows no continuity. Replace lamp. D2. Check continuity of fuse on circuit board. NORMAL INDICATION: Fuse shows continuity. Go to next step. ABNORMAL INDICATION: Replace fuse. If fuse blows again, replace circuit board. D3. Check slide switches on circuit board for continuity. NORMAL INDICATION: Switches show continuity. Proceed to next step. ABNORMAL INDICATION: Switches show no continuity. Replace circuit board. ISSUED 4/84 NORDSON CORPORATION 984

27 D4, Check input connections from trigger device.. Check for loose or broken wires. 2. Make sure trigger is connected according to instructions in electrical installation. For breaklight mode or normally closed limit switch, see left half of Figure 5. For makelight mode or normally open switch, see right half of Figure 5. NORMAL INDICATION: All wires are secure and correctly positioned, Go to next step. ABNORMAL INDICATION: Correct problem and resume operation. D5. Check trigger device for proper voltage.. Turn on the power to the unit, 2. Check voltage across terminals 7 and 8 on TBl. NORMAL INDICATION: Voltage reads 6.3 VAC (HO%). Go to next step. ABNORMAL INDICATION: Replace transformer. D6. Check alignment of phototransistor receiver and light source.. Turn off the power to the unit. 2. Attach voltmeter probes across the red and black leads of the phototransistor receiver by placing the voltmeter% positive lead on the receiver's red lead and its negative lead on to the receiver% black lead. 3. Turn on the power to the unit and read voltage. NORMAL INDICATION: Meter reads less than.5 Vdc. Proceed to next step. ABNORMAL INDICATION: Realign photoreceiver and light source. D7, Check transformer secondary.. Turn on the power to the unit. 2. Unplug the printed circuit board at Jl (see Figure ). 3. Check the voltage across pins and 5 in the six-pin circuit board plug (the pins connected to the two red wires). NORMAL INDICATION: Meter reads ABNORMAL INDICATION: Rebetween 3 and 4 VAC. Proceed place transformer. to next step. D8* Check potentiometers., Unplug the printed circuit board at Jl (see Figure ). 2. Rotate the potentiometer dials counterclockwise to zero. 3. Attach an ohmmeter to the two rear terminals on the potentiometer (wires 4 and 5 on the duration potentiometer and wires 5 and 6 on the delay potentiometer). 57-3mIssued 5/88=O Corporation 988

28 Atlanta. Georgia TECHNICAl PUB ICATION 4. Set the meter to the K scale. 5. Slowly rotate the potentiometer dial clockwise through all ten turns. 6. Repeat this test on both potentiometers. NORMAL INDICATION: The resistance reading should steadily increase to K ohms. ABNORMAL INDICATION: Resistance drops off during the test, indicating a "dead" spot in the potentiometer. Replace potentiometer. D9. Check voltage of power transistor.. With both plugs, Jl and 52, still connected to the circuit board, carefully slide the board out of its retaining slot. 2. Turn on the power to the unit. 3. Place one probe of the voltmeter on the contact point at Jl for wire. Place the other probe on the ground stud. NORMAL INDICATION: Meter reads between 24 and 3 Vdc. Replace circuit board (see note in Step B4). ABNORMAL INDICATION: Replace power transistor. GUN(S) FIRING ERRATICALLY El. Check trigger device: See Steps D4, D5, and D6. E2. Check potentiometers: See Step D8. E3. Check gun solenoid circuit. See Steps C3 and C4. E4. Replace circuit board: See note at Step B4. TIMER CYCLES AFTER POWER IS TURNED OFF Fl. Check to see if CT-6 was shut down prior to the unit, at the the parent machine or at the main circuit breaker. NORMAL INDICATION: Timer was shut off at switch on front panel of CT-6. Go to next step. ABNORMAL INDICATION: Timer was shut down externally. To correct problem, always shut the CT-6 down at the switch on the timer. F2. Check for continuity of switch on front panel.. Make sure front panel switch is turned off. ISSUED 484 NORDSON CORPORATION 984

29 Atlanta. Georgia TECHNICAL PUB ICATION Check continuity across front panel switch terminals where wires G4 and 7 are connected. NORMAL INDICATION: Switch shows continuity. Replace circuit board. ABNORMAL INDICATION: Switch shows no continuity. Replace switch/circuit breaker. DISASSEMBLY AND REPAIR Due to the solid state design of the CT-6, disassembly and repair are basically limited to the replacement of simple components such as lamps, potentiometers, the transformer, or the printed circuit board. Replacement of these items requires no special tools or procedures. Proper care should be taken when replacing electrical components to prevent either damage to the unit or personal injury to the individual performing the repairs. Repairs should & performed by qualified personnel only. ISSUED 4/84 I! 9 A. NORDSON CORPORATION 984

30 Atlanta, Georgia TECHNICAL PUBlICAllON / r / / / P / /. I A % Figure - CT-6 Wiring Diagram ISSUED 484 NORDSON CORPORATION 984

31 Atlanta, Georgia TECHNICAL PUB /CATION SECTION V ILLUSTRATED PARTS LIST COLUMN IDENTIFICATION The Item No. column indicates the number assigned to the part in the associated figure. A dash is used for parts that are not shown. The Part No. column indicates the part number for the part. A dash signifies that the item is a nonsaleable part or a nonsaleable subassembly of a saleable assembly. The Description column gives the name of the part together with its dimensions and other physical properties, where appropriate. The Req'd column indicates the quantity required per unit or assembly. When the item is listed for reference only or the quantity is not applicable, the term "Ref" or a dash, respectively, appears in the column. ISSUED 4/84 NORDSON CORPORATION 984

32 Atlanta. Georgia TECHNICAL PUB /CATION 6 5 OUTPUT Nordsor 3 \ Figure 2 - CT-6 Time Interval Control ISSUED 4 / 8 4 NORDSON CORPORATION 984

33 Atlanta, Georgia TECHNICAL PUB ICATION W-3-29 PARTS LIST FOR CT-6 Item No. Part No. Description Req'd Timer, CT-6, w/photosensor, VAC Timer, CT-6, w/photosensor, 2 VAC Timer, CT-6, w/photosensor, 2 VAC Timer, CT-6, w/photosensor, 24 VAC O Timer, CT-6, w/o Photosensor, VAC O Timer, CT-6, w/o Photosensor, 2 VAC O Timer, CT-6, w/o Photosensor, 2 VAC O Timer, CT-6, w/o Photosensor, 24 VAC O" Screw, Pan Hd, 6-32 x.9 in. O" Cabinet, CT-6 O" Dial, Counting, lo-turn O" Nameplate, Control Panel, CT-6 O" Lamp, Indicator, Rectangular, Amber, 28 VAC O" Lamp, Indicator, Rectangular, White, 25 VAC O" Tag, Approval, LA (2 VAC and 24 VAC Models only) O" Screw, Pan Hd, 4-4 x.437 in. O" Latch, Cabinet O" Screw, Fil Hd, l/4-28 x.62 in. O" Tag, Inspection O Light, Source, Phototransistor, w/2 ft Cable O" Lamp, Replacement O Receiver, Phototransistor, w/2 ft Cable O" Element, Phototransistor Ref Ref Ref Ref ISSUED 4 / 8 4 NORDSON CORPORATION 984

34 Atlanta. Georgia TECHNICAL PUB ICATION - i 4 Figure 3 - Inside View of CT-6 Control Cabinet ISSUED 4 / 8 4 NORDSON CORPORATION 984 All Rlghts

35 Atlanta, Georgia TECHNICAL PUBLICATION PARTS LIST FOR CT-6 Item No. Part No. Description Req'd Timer, CT-6, w/o Photosensor, VAC Timer, CT-6, w/o Photosensor, 2 VAC Timer, CT-6, w/o Photosensor, 2 VAC Timer, CT-6, w/o Photosensor, 24 VAC O Breaker, 2 Pole, 25 VAC,. A O Nut, Hex, Mach., lo-32 O Washer, Lock, Ext, No. O Plate, Information, CT-Timers O Panel w/hardware, 2 VAC Panel Screw, Pan Hd, 6-32 x.3 in. Screw, Round Hd, Slotted, Tap, 4-4 x.25 in. Screw, Pan Hd, 6-32 x.9 in. Washer, Lock, Split, No. 6 Strip, Marker, 2-Station Tag I Wiring Spacer, Standoff Nut, Captive, 6-32 Screw, Pan Hd, lo-24 x.38 in. Washer, Lock, Split, No. Nut, Captive, lo-24 Transformer w/harness Ooo Transformer Ooo Block, Terminal, 4-Station Ooo Jumper, Terminal Block Ooo Tubing, Heat-shrink Ooo Terminal, Socket, 2-4 Ooo Terminalk Flangespade, Ins Ooo Strap, Cable O" Tubing, Heat-shrink,.45 ID O" Strip, Marker, 4-Station O" Harness, Wiring Ooo Terminal, Ring-tongue, Ins Ooo Strap, Cable Ooo Connector, Socket, 6-pin Ooo Block, Terminal, 2-Station Ooo Jumper, Terminal Block Ooo Wire, 22 Ga, Vinyl, Black Ooo Marker, Wire, Miniature Ooo Flangespade, Terminal, Ins Ooo Connector, Socket, 6-pin ft ft ISSUED 4 / 8 4 NORDSON CORPORATION 984

36 Atlanta, Georgia TECHNICAL PUBLICATION PARTS LIST FOR CT _*. Item No. Part No. Description Req'd Ooo Terminal, Socket Ooo Terminal, Push-on Ooo Wire, Vinyl, No. 2, Green/Yellow Ooo Terminal, Push-on, Fully Ins Ooo Marker, Wire, Positive O" Capacitor, Filter O" Clip, Component O" Retainer, Circuit Board O" Strap, Cable O" Capacitor, Line Filter O Washer, Lock, Ext, No. 8 O Screw, Pan Hd, 9-32 x.25 in. O Transistor w/heat Sink O Board, Circuit, CT-6 O" Fuse, 2.5 A, 25 VAC O Potentiometer, lo-turn O Rivet, Pop, 3-32 x.24 in. O Tag, Wiring O Strap, Cable O Flangespade, Terminal, Ins O Tubing, Heat-shrink O Tag, Ground Connection O Jumper, Terminal Block O Gasket, Cabinet O Screw, Pan Hd, lo-32 x.38 in. O Washer, Lock, Split, No. O Plug, Button,.88 O Plug, Cap, Tapered,.9 OD O Nut, Hex, Machined, 4-4 O Tubing, Heat-shrink ft 2.8 ft ft ISSUED 4 / 8 4 NORDSON CORPORATION 984

37 Packagrng and Assembly D/vision Atlanta, Georgia TECHNICAL PUB ICATION /34 RECOMMENDED SPARE PARTS LIST Part No. Description Req'd Lamp I Indicator, Power Lamp I Indicator, Output Potentiometer, lo-turn Board, Circuit Fuse, Circuit Board Lamp, Phototransistor Light Source 2 ISSUED 4 / 8 4 U.S A. NORDSON CORPORATION 984

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