AirSpeed 5000 General Procedures

Rosenthal 30in SHEETMASTER

Troubleshooting Guide

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Rosenthal Sheetmaster Components

1 Cut Motor 7. Power Supply

2. Cut Motor Clutch Brake (not shown) 8. Drive Roller

3. Drive Motor 9. Tension Roller

4. Drive Motor Clutch Brake 10. Foam Rollers

5. Gear Box 11. Blower (not shown)

6. Encoder 12. Blower Switch (not shown)

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1 7

6 5

2 4 3

9 10

12

11

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Brushed DC motors

Drive Motor

The classic DC motor design generates an oscillating current in a wound rotor, or armature, with a split ring commutator, and either a wound or permanent magnet stator. A rotor consists of one or more coils of wire wound around a core on a shaft; an electrical power source is connected to the rotor coil through the commutator and its brushes, causing current to flow in it, producing electromagnetism. The commutator causes the current in the coils to be switched as the rotor turns, keeping the magnetic poles of the rotor from ever fully aligning with the magnetic poles of the stator field, so that the rotor never stops (like a compass needle does) but rather keeps rotating indefinitely (as long as power is applied and is sufficient for the motor to overcome the shaft torque load and internal losses due to friction, etc.)

Many of the limitations of the classic commutator DC motor are due to the need for brushes to press against the commutator. This creates friction. At higher speeds, brushes have increasing difficulty in maintaining contact. Brushes may bounce off the irregularities in the commutator surface, creating sparks. (Sparks are also created inevitably by the brushes making and breaking circuits through the rotor coils as the brushes cross the insulating gaps between commutator sections. Depending on the commutator design, this may include the brushes shorting together adjacent sectionsand hence coil endsmomentarily while crossing the gaps. Furthermore, the inductance of the rotor coils causes the voltage across each to rise when its circuit is opened, increasing the sparking of the brushes.) This sparking limits the maximum speed of the machine, as too-rapid sparking will overheat, erode, or even melt the commutator. The current density per unit area of the brushes, in combination with their resistivity, limits the output of the motor. The making and breaking of electric contact also causes electrical noise, and the sparks additionally cause RFI. Brushes eventually wear out and require replacement, and the commutator itself is subject to wear and maintenance (on larger motors) or replacement (on small motors). The commutator assembly on a large machine is a costly element, requiring precision assembly of many parts. On small motors, the commutator is usually permanently integrated into the rotor, so replacing it usually requires replacing the whole rotor.

http://en.wikipedia.org/wiki/Friction

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A relay is an electrically operated switch. Many relays use an electromagnet to operate a switching mechanism, but other operating principles are also used. Relays find applications where it is necessary to control a circuit by a low-power signal, or where several circuits must be controlled by one signal. The first relays were used in long distance telegraph circuits, repeating the signal coming in from one circuit and re-transmitting it to another. Relays found extensive use in telephone exchanges and early computers to perform logical operations. A type of relay that can handle the high power required to directly drive an electric motor is called a contactor. Solid-state relays control power circuits with no moving parts, instead using a semiconductor device triggered by light to perform switching. Relays with calibrated operating characteristics and sometimes multiple operating coils are used to protect electrical circuits from overload or faults; in modern electric power systems these functions are performed by digital instruments still called "protection relays".

Relay

The interlock switch, which is used to control, regulation, precision engineering, devices is an electrical switch that is designed to be operated

Interlock Switch

An interlock switch (micro switch, snap-action switch, etc.) is an electric switch that is able to be actuated by very little physical force, through the use of a tipping-point mechanism. They are very common due to their low cost and extreme durability, typically greater than 1 million cycles and up to 10 million cycles for heavy duty models. This durability is a natural consequence of the design. Internally a stiff metal strip must be bent to activate the switch. This produces a very distinctive clicking sound and a very crisp feel. When pressure is removed the metal strip springs back to its original state.

The defining feature of interlock switches is that a relatively small movement at the actuator button produces a relative large movement at the electrical contacts, which occurs at high speed (regardless of the speed of actuation). Most successful designs also exhibit hysteresis, meaning that a small reversal of the actuator is insufficient to reverse the contacts; there must be a significant movement in the opposite direction. Both of these characteristics help to achieve a clean and reliable interruption to the switched circuit.

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by the physical movement of mechanical devices. The principal characteristics of the standard interlock switch are that it usually works with currents from 0.1A to 15A, it resists temperatures between -30 and 80 Celsius degrees.

Encoder

An encoder is a device, circuit, transducer, software program, algorithm or person that converts information from one format or code to another, for the purposes of standardization, speed, secrecy, security, or saving space by shrinking size.

A traditional incremental encoder works by providing an A and a B pulse output which provide no usable count information in their own right. Rather, the counting is done in the external electronics. The point where the counting begins depends on the counter in the external electronics and not on the position of the encoder. To provide useful position information, the encoder position must be referenced to the device to which it is attached, generally using an index pulse. The distinguishing feature of the incremental encoder is that it reports an incremental change in position of the encoder to the counting electronics.

Traditional incremental encoders

There are only three parts: field, armature, and hub (which is the input on a brake). Usually the magnetic field is bolted to the machine frame (or uses a torque arm that can handle the torque of the brake). So when the armature is attracted to the field the

Clutch Brake

An electromagnetic clutch is a clutch (a mechanism for transmitting rotation) that is engaged and disengaged by an electromagnetic actuator. Electromagnetic clutches operate electrically, but transmit torque mechanically. This is why they used to be referred to as electromechanical clutches and brakes.

A clutch has four main parts: field, rotor, armature, and hub (output). When voltage is applied the stationary magnetic field generates the lines of flux that pass into the rotor. (The rotor is normally connected to the part that is always moving in the machine.) The flux (magnetic attraction) pulls the armature in contact with the rotor (the armature is connected to the component that requires the acceleration), as the armature and the output start to accelerate. Slippage between the rotor face and the armature face continues until the input and output speeds match (100% lockup). The actual time for this is quite short .02-1.0sec.

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stopping torque is transferred into the field housing and into the machine frame decelerating the load. Like the clutch this can happen very fast. If required, and within a small range, both clutch and brake time to speed and stop can be controlled by varying the voltage/current applied.

Disengagement is the same for both. Once the field starts to degrade flux falls rapidly and the armature separates. A spring(s) hold the armature away from its corresponding contact surface at a predetermined air gap. [6

Typically if a coil fails it is usually due to heat which has caused the insulation of the coil wire to break down. That heat can be caused by high ambient temperature, high cycle rates, slipping or applying too high of a voltage. Bushings can be used in some clutches that have low speed, low side loads or low operating hours. At higher loads and speeds, bearing mounted field/rotors and hubs are a better option. Like the coils, unless bearings are stressed beyond their physical limitations or become contaminated, they tend to have a long life and they are usually the second item to wear out.

The main wear in electromagnetic clutches occurs on the faces of the mating surfaces. Every time a clutch is engaged during rotation a certain amount of energy is transferred as heat. The transfer, which occurs during rotation, wears both the armature and the opposing contact surface. Based upon the size of the clutch, the speed and the inertia, wear rates will differ. For example a machine that was running at 500 rpm with a clutch and is now sped up to 1000 rpm would have its wear rate significantly increased because the amount of energy required to start the same amount of inertia is a lot higher at the higher speed. With a fixed armature design a clutch will eventually simply cease to engage. This is because the air gap will eventually become too large for the magnetic field to overcome. Zero gap or auto wear armatures can wear to the point of less than one half of its original thickness, which will eventually cause missed engagements.

http://en.wikipedia.org/wiki/Friction-plate_electromagnetic_clutch#cite_note-5#cite_note-5

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Start Cycle

Encoder calculates

length based on rotation

Drive Clutch- brake relay

activated

Stop Cycle

Drive Components Cut Components

Rosenthal Sheet Master Time Line

DriveClutch-Brake deactivated

Drive motor engaged

Drive clutch-bake relay deactivated

DriveClutch Brake

activated

Cut clutch-brake relay activated

Sheet length reached

Cutclutch-brake deactivated

Cut motor engaged

Blade activation

Blade rotates and deactivates

micro switch

Blade completes one cycle and activates micro

switch

Mode dependent

batch

Automatic Length /footswitch

Auto Off

Batch complete

Batch not complete

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Rosenthal 30 inch SHEETMASTER

Troubleshooting Procedures

NOTE: The most important thing to remember about this machine is that all of its processes (e.g. driving the material, cutting the material, batch cutting, etc.) are a series of dependant steps. If one of the steps has not been completed all remaining steps cannot be competed.

NOTE: There are a series of lights located on the right side of the control panel. Each light corresponds to the various functions of the machine. Observing these lights during machine operation and understanding their meaning will often help lessen the time it takes to diagnose a machine issue.

Problem Description:

MACHINE WILL NOT OPERATE AT ALL - (NO lights on control.)

Possible Causes:

Inadequate power source

Line cord damaged

Main power switch failure

Troubleshooting Steps:

Test for electricity at receptacle to which sheeter is connected. Sheeters require 115-120 volts, single phase, 60 hertz electrical service unless otherwise labeled.

Check continuity of line cord.

Test MAIN POWER switch on sheeter control.

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Resolution:

Obtain a proper power source.

Replace power cord.

Replace main power switch.

Problem Description:

MACHINE WILL NOT OPERATE AT ALL - (Electronic counter is lighted.)

Possible Causes:

Circuit breaker tripped

Faulty power supply

Troubleshooting Steps:

Check AC circuit breaker on face of control panel.

Test DC power output of power supply.

Resolution:

Reset circuit breaker

Replace power supply

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Problem Description:

MACHINE OPERATES PROPERLY BUT IS INTERRUPTED - (random pattern)

Interlock switch is set too sensitive

Possible Causes:

If an interlock switch is set too sensitively, machine vibration may be adequate to cause activation of the interlock. As the interlock LEDs only work when a switch is actuated, the brief flash may not be seen and the control panel will appear normal but will not operate after the interlock light goes off.

If the interruption takes place during the FEED of a LENGTH cycle, the counter remembers how much material was sheeted. To resume sheeting, touch the LENGTH button or the AUTOMATIC keypad for the balance of the sheet.

If the interruption occurs during the CUT cycle, touch the CUT button once to reset the knife which will permit resumption of operation.

Troubleshooting Steps:

Resolution:

Adjust interlock switch.

Problem Description:

NO LENGTH OPERATION - (Counter display and batch counter are ON)

Interlock switch

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Batch is complete

Possible Causes:

Counter failure

Troubleshooting Steps:

Batch is complete. Reset batch counter or turn batch counter OFF to restore operation.

Batch not complete but no LENGTH indicates defective batch counter function

Resolution:

Reset batch.

Replace counter.

Problem Description:

NO LENGTH OPERATION-(Counter display is ON, Batch counter is OFF)

Possible Causes:

Length button failure.

Counter failure.

Troubleshooting Steps:

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If manual FEED and AUTOMATIC functions operate, test the LENGTH button switch.

Resolution:

Replace electronic counter.

Replace the LENGTH switch.

Problem Description:

MOVING BLADE CYCLES AND STOPS IN MATERIAL FEED PATH

Possible Causes:

Jam up flap interlock switch set too sensitively. Ideally, the actuating lever of the switch is formed so that it does not rest against the cam which activates it. In this way, vibration from the cutting action can not be transmitted from the machine to the switch contacts and cause premature opening.

Other interlock switches trip premature.

Troubleshooting Steps:

Inspect interlock switches. Verify proper adjustment.

Resolution:

Adjust interlock switch

CUT OPERATES CONTINUOUSLY - WILL NOT STOP

Problem Description:

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Knife cycle switch misaligned or has failed.

Possible Causes:

Clutch brake locked.

Check for proper operation of cam against knife cycle switch for cycle cancellation.

Troubleshooting Steps:

Inspect for possibility of locked clutch armature.

Resolution:

Replace or adjust cycle switch

Replace clutch brake

Problem Description:

LENGTH STARTS BUT WILL NOT STOP

Encoder failure

Possible Causes:

Counter failure

Troubleshooting Steps:

Cam Cycle switch

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Check for contact of encoder drive wheel against feed roll. The moving feed roll must cause encoder wheel movement for material measurement.

Is the encoder plug tightly connected? Encoder cable wire leads secure.

Resolution:

Replace encoder.

Replace electronic counter.

Problem Description:

JAM UPS: (Undesirable fouling of the machine with material that is to be sheeted.)

WARNING: TURN POWER OFF BEFORE CLEARING ANY JAM!

Possible Causes:

Can be caused by resistance to material travel as it is pushed forward by the feed roll.

Material too thick for knife opening.

Roll of material not centered and dragging on one side of machine against guards, etc.

Knife not completely out of material path.

Material is very flimsy.

Pressure roll applies excessive pressure to material causing upward buckling and therefore rubbing against knife angle.

Pressure roll not parallel to feed roll.

Textured material clings to feed roll.

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Downward curl of material leading edge can be trapped in space between paper chute and stainless steel delivery top.

Troubleshooting Steps:

Clean dirty surfaces or replace damaged paper chute covering.

Test CUT brake action or possibly setting of knife cycle cam actuator.

Reduce feed rate.

Resolution:

Clean dirty surfaces or replace damaged paper chute covering.

Reduce feed rate.

Invert material roll.

Problem Description:

Machine will not cut (i.e. cut blade does not cycle)

Drive motor failure

Possible Causes:

Cut motor failure

Cut motor circuit breaker is tripped

Cut motor relay failure

Cut motor clutch brake failure

Belt is broken or has fallen off

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Drive motor clutch brake failure

Troubleshooting Steps:

First, determine if the problem is related to a component within the cut mechanism or if it is being caused by something else. For example:

Remove the two screws on the front of the control panel and open the lid. On the bottom of the counter are the cut and drive motor relays. Remove the relays by expanding the hold down tabs and gently prying them out using a small screw driver. Switch the relays from one position to the other (they are identical). If the issue moves to the other component (e.g. the drive motor was working, the cut motor was not, now the opposite is true) the relay has failed.

Relays

If either motor (cut or drive) appears not to be functioning it is always best to perform a simple test to determine whether the relay is the cause of the issue. To test the relays, perform the following procedure:

Diagnosis continued..

Cut Motor Relay

Drive motor relay

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On the control pad, press FUNCTION then press CUT. If the components are functioning correctly the cut blade will cycle once. If the cut blade does not cycle the problem is associated with the cut mechanism. If the cut blade does cycle the problem is associated with another component.

If the cut blade does not cycle:

Remove machine cover and inspect the cut motor. With the machine powered on the cut motor should be running, which can simply be identified by the audible drone of the motor or by feeling the motor for vibration. Verify the cut motor circuit breaker is not tripped by simply pressing it. (Note: this is a red or grey button on the back of the cut motor housing).

Verify the cut motor drive belt is intact and is adjusted properly. (Note: the belt should have approximately 1in of play) Note: Adjustments are made by loosening the four mounting bolts and moving the motor/clutch brake assembly (the mounts are slotted).

Cut motor reset button Power Supply

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With the machine powered attempt to cycle the cut blade by rotating the cut motor drive belt manually.

Repeat this step with the machine powered off. With the machine on you should not be able to move the belt. With the machine off you should be able to move the belt freely and be able to cycle the cut blade through its entire rotation. If either condition is not met the cut motor clutch brake is out of adjustment or has failed.

If the cut blade does cycle:

Select (or program- see attached programming guide) the shortest preset length and press the run (green) button. Visually inspect the drive roller. If the drive roller is turning and is obviously running longer than it should (example: with the speed set at 60 the drive roller should take approximately 1-2 seconds to run 12in) or runs continuously the encoder has a faulty connection or has failed.

If the roller is not turning remove the rear cover from the machine and inspect the drive motor.

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With the machine powered on the drive motor should be running, which can simply be identified by the audible drone of the motor or by feeling the motor for vibration. Remove the belt cover (drive motor side of the machine) and verify the belt is intact. With the machine on, manually rotate the drive roller. Repeat this step with the machine powered off. With the machine on you should not be able to move the roller. With the machine off you should be able to move the roller freely. If either condition is not met the drive motor clutch brake is out of adjustment or has failed.

Resolution:

Reset circuit breaker

Replace cut motor relay

Replace cut motor

Adjust or replace cut motor clutch brake

Replace cut motor drive belt or adjust tension

Replace encoder cable

Drive Motor Clutch Brake

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Replace encoder

Replace drive motor

Adjust or replace drive motor clutch brake

Replace drive belt or adjust tension

All the lights on the control panel are flashing

Problem Description:

Hood is not in the down position

Safety interlock switches are obstructed

Hood safety switch failure

Interlock safety switch failure

Possible Causes:

First verify the hood is in the down position and unobstructed. Then inspect the interlock safety switches for obstructions. Note: the interlock switch that is just forward of the encoder is especially prone to obstruction due to where it is located in the debris path (cut debris often falls into the machine) and damage caused by the metal bar that actuates it.

Troubleshooting Steps:

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Disconnect the hood safety switch and bypass (This is easily accomplished by disconnecting the wiring harness at the switch and installing a jumper wire).

Ensure interlock switches are fully actuated Note: the interlock switch just forward of the encoder has a long metal tab that is prone to bending. This switch can simply be repaired by readjusting the tab.

Reposition hood and/or remove obstructions

Resolution:

Replace hood safety switch

Adjust interlock switch(s)

Replace interlock switch(s)

Interlock Switch

Encoder

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Machine not cutting the material completely (leaving an inch or two uncut)

Problem Description:

Dull blade

Possible Causes:

Not enough blade tension

Blade ramp out of adjustment

If the blades are damaged or dull simply remove and replace.

Troubleshooting steps:

Adjust blade tension by rotating the adjustment bolt on the front of the machine clockwise. Note: Adjusting blade tension is very subjective. There is no set scale to determine how much blade tension is needed. However, a good rule is of thumb is to keep the tension between and of the adjustment bolt travel.

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Manually raise the lower blade to where it just comes in contact with the fixed, upper blade. A properly adjusted blade will contact the leading edge slightly and then continue in a scissor like motion with the two blades only fractions of an inch apart. If theses conditions are not met, adjust the ramp by loosening the set screw (Allen head) and tightening or loosening the adjustment screw. Once the blade is adjusted properly retighten the set screw.

Replace blades

Adjust blade tension

Adjust blade ramp

Resolution:

Problem Description Machine is cutting material at substantially greater lengths then programmed

Possible Causes:

Encoder wiring failure

Encoder failure

Set screw

Adjustment Screw

Ramp Assembly

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NOTE: When diagnosing an encoder issue always check the encoder wiring harness first. The harness is connected to the controller in a location that makes it very susceptible to damage.

Trouble Shooting Steps:

Verify machine is cutting material at a greater length than expected by selecting or programming a preset length and running several pieces. (Note: The lengths, more than likely will be substantially longer than expected.)

Visually inspect the encoder wiring harness for damage (broken connecters, frayed wires, etc.) and ensure that it is plugged in correctly. Perform a continuity check for each wire if necessary.

Encoder harness

Main Wiring Harness

Encoder

Interlock Switch

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Resolution:

If the encoder wiring is damaged, replace harness

If the encoder wiring has passed inspection and the machine is still running greater lengths than programmed, replace encoder.

Problem Description:

Machine is cutting material at intermittent lengths

Possible Causes:

Machine is running too fast for the material type/thickness

Material is slipping

Rollers (foam rollers and drive roller) are dirty or worn

Inspect rollers for wear or debris

Troubleshooting Steps:

Reduce machine speed

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Resolution:

Clean drive roller

Replace foam rollers

Reduce machine speed and retrain operator

Problem Description:

BLADE NOISE DURING CUTTING

Possible Causes:

If the normal sound of the cutting mechanism changes, discontinue operation until the noise source is located. The cause of an elevated sound level may be due to:

Dull Blades

Blade collision!

Worn rod end bearings

The increased radius of dull blade edges! Resharpening of the original blades or new replacement blades will require properly prepared cutting edges before they are placed into service.

Troubleshooting Steps:

A freshly sharpened cutting edge formed by the junction of the bevel and the blade face is too sharp for practical use. It has no structural strength and is easily damaged. A slight decrease of this sharpness is recommended and quickly accomplished by gentle, uniform rubbing at a tangent to the edge with a fine grit

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sharpening stone. Only a very small radius is desired so that sharpness is preserved. Excessive stoning will dull the blade and shorten its cutting life.

Force applied to the stationary blade edge by the moving blade edge is determined by tensioning of a single spring (two springs on 60" capacity machines) that can be adjusted at the front of the machine. New or resharpened blades cut efficiently so tension should always be reduced to whatever minimum level is required for complete cutting of the material. As the blades dull through use, appropriate increases in blade tension are necessary but should not exceed that required for restoration of cutting.

Blade collision! This highly injurious condition should be corrected immediately because the moving blade is colliding with the bottom of the stationary blade as it lifts to cut.

Loosen the laterally positioned, 1/4-28 brass tipped socket set screw in the guide block at the right side of the machine above the control panel. This will release the 114-28 x 1-314 socket set screw which positions the guide spring longitudinally, in and out from the block.

Inspect all bearings associated with blade travel for excessive play. Ideally there should be very little or no play.

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Adjustment of the knife guide spring determines the tracking position of the cam follower attached to the moving blade assembly. By relocating the spring properly, the elevating edge of the moving blade will contact the edge of the stationary blade approximately 112" from the right side, outer edge of the stationary blade. This is the point where cutting starts. Secure the adjusting screw with the locking screw to preserve this adjustment.

Resolution:

Replace blades

Replace rod end bearings

Adjust blade tension

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LENGTH/SLO - When on continuously, this light indicates that a preset length is in operation or /- that a length is being preset.

CUT - Lights during the cutting cycle.

BATCH - When on continuously, this light indicates that a batch function is in operation. When it flashes, the preset batch quantity has been satisfied. If it is off, the batch function is not in use and sheeting can continue without interruption.

AUTOMATIC- Lights when automatic function is engaged for repetitive length cycling

SMALL FLASHING LED - at the lower, right comer of the display indicates encoder input (flashes for each 256 encoder pulses).

ALL LED FLASHING - A safety interlock switch has been actuated. The machine will not operate until the switch has been restored.

LED DISPLAY INDICATORS:

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ELECTRONIC COUNTER OPERATION - The encoder assembly generates electrical pulses as movement of the feed roll drives its shaft The electronic counter will count these pulses and monitor feed roll surface movement (process is indicated by small, flashing LED at the lower right hand comer of the display).

"OVERSHOOTING - When a length preset is entered and the length button, foot pedal or automatic operation is initiated, the feed roll starts moving and will do so until the number of pulses counted is the same as the length preset. At that point the counter signals the machine to stop but, between the stop signal and the actual halt of the roll, some roll movement must occur. This will be a function of &e speed of operation and the braking action. As this extra length is obviously undesirable, it must be deducted from the sheet length so that the sheeter produces only the length requested in the length preset. Early model sheeters required the operator to enter a smaller preset length so the resulting length would be correct. The electronic counter used in the PACTIV ASTRO-SHEETER is microprocessor based and can provide a variety of counting functions including automatic overshoot deduction, if enabled, by setting code 12 at a value higher than zero.

Before the electronic counter "knows" what the overshoot is, it must be established. Therefore, the first length sheeted after a length preset change or after pressing the length reset button twice, will be longer than the sheets which follow because there was no overshoot to deduct. After that, with code 12 set at 1, the counter remembers the overshoot of each preceding sheet and. automatically deducts it from the next.

SCALE FACTOR (CODE 01): This feature can be nullified if set at 1 .OW00 and is not required for proper counter operation. However, if it is used improperly, it can prevent accurate sheerer results. There is additional significance to code 01 as it applies to any sheeter shipped to an installation where the screen displays centimeters rather than inches.

Scaling permits alteration of how the counter will count. At an initial setting of 1.00000, for domestic use, it counts at the rate of 100 per inch of material movement. As the screen display is in inches, no scaling factor is

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required. After, the longest length intended to be dispensed by the sheerer has been determined, it should be entered into the electronic counter as a "length preset" Then the length button is pressed to provide a sheet that will ideally be the same as the preset selected. (Note that the first sheet will always be slightly longer than those which follow it due to the automatic overshoot feature. Therefore, the first sheet length must be disregarded in this test.)

If the output of the sheeter is other than the preset length, (a possibility that occurs due to variations in component structure) the electronic counter can be "calibrated" so that output matches the preset. Division of the output length by the preset produces a ratio (of length to pulses) and by exchanging the initial value of 1.0000 at code 01 to the new ratio number, the result will be the counting of the number of pulses required to produce the desired, preset length.

For metric readout, with no scaling factor entered (1.0000), enter the length preset as the desired number of centimeters. Dispense one length and discard it. Then dispense a second length and measure it carefully. Obviously, the output length will not be correct. However, after dividing that output length by the length preset and entering that ratio as the new scaling factor, the resulting sheets will be delivered in centimeters.

OVERSHOOT AVERAGING: Variations in the overshoot of each sheet will necessarily produce a varying reduction in the projected preset length of the subsequent sheet. Therefore, with a code 12 value of 1, if a sheeted length exceeds the preset length by approximately one' inch, the subsequent sheet will have approximately one inch deducted from it during the count (measurement) process to produce the desired preset length.

If variations cause variations, they can be disbursed over a greater number of sheets to promote consistency. As an example, if the code 12 value is changed to 4, each of the overshoot errors of four previous sheets would be required before an average of the four would be deducted from the fifth sheet. However, the theoretical value of this feature is relatively useless when slippage of the material occurs during sheeting due to poor condition of the rubber feed roll surface, inconsistent braking of the feed roll drive or

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because of the nature of the material. Erratic overshoot deductions can produce a trend of inaccurate sheeter performance so averaging should not be used to compensate for poor machine maintenance. In this case, a code 12 value of I.

PROGRAM -A sequence of coded instructions in a microprocessor based electronic counter to predetermine the way it will perform.

The 17 codes and their value options are listed in a separate counter instruction manual where the function of each code is described.

TO VIEW THE PROGRAM: Press [FUNCTION] + [I]. The first code 01' will be displayed. As [I] is released, its value appears. Each subsequent push of [ENTER] will display the next code and then its value when [ENTER] is released. No alteration to the program is permitted during this scan of the codes and their values.

TO CHANGE A SINGLE CODE VALUE: Press [ENTER] + [FUNCTION] + (11 within 4 seconds of each other. A display of 00 indicates the counter is in the program mode which provides' capability for changing code values. Then press [FUNCTIONJ + the numbered keys required to access and display any specific code. To change that code's value, press the appropriate keys followed by [ENTER].

TO CHANGE A PROGRAM: Press [ENTER] + [FUNCTION]+ [I]. A display of 00indicates the counter is in the program mode. Pressing [ENTER] permits scrolling through the codes. As [ENTER] is pressed, the next code will appear and when [ENTER] is released, its value is displayed. If a displayed value is to be changed, press the numbered keys required to create the new value, see it displayed and press [ENTER]. The new value

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will be exchanged for the original value and then the next code will be displayed.

TO EXIT PROGRAMMING: Press [FUNCTION] + [BATCH ONIOFF]. The display defaults to the batch counter.

CODES

Depending on when the machine was made, there are three possible passwords for accessing the codes:

Enter Function 1

Enter Function 9

Enter function 1314

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PREGIS

ASTRO SHEETER PROGRAMMING

Change Length:

1. Press Recipe# Key 1-8 2. Press ENTER 3. Enter Length ( example 12.00) 4. Press ENTER 5. Press ENTER (not all controllers require this step)

Set Batch

1. Press Recipe # Key 1-8 2. Press ENTER 3. Press FUNCTION 4. Press BATCH PRESET (Key # 2) 5. Enter number of sheets 6. Press ENTER

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To use Batch

Batch must be reset to be used. This will reset the batch count to 0

1. Press ENTER

2. Press FUNCTION

3. Press BATCH RESET (key # 4)

The Batch Function must be turned on.

1. Press BATCH ON/OFF (batch Light will be illuminated)

To start batch

1. Press AUTOMATICON/OFF

After Batch completion:

To use current batch and restart machine:

1. Press ENTER 2. Press Function 3. Press BATCH RESET (Key # 4)

If you are not going to use batch:

1. Press AUTOMATIC ON/OFF 2. Press BATCH ON/OFF (batch light will go off)

UDrive MotorBrushed DC motorsURelayA relay is an electrically operated switch. Many relays use an electromagnet to operate a switching mechanism, but other operating principles are also used. Relays find applications where it is necessary to control a circuit by a low-power signal, or ...1TTraditional incremental encoders