Graco PR70 Operation & Maintenance Manual
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Graco PR70 Operation & Maintenance Manual

Graco PR70 Operation & Maintenance Manual

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Operation - Maintenance
PR70 Servo
Fixed or variable ratio systems. For accurate metering, mixing, and dispensing of
two-component materials. For professional use only.
Not approved for use in European explosive atmosphere locations.
Models U81923 and U82204
3000 psi (21 MPa, 207 bar) Maximum Working Pressure
100 psi (0.7 MPa, 7 bar) Maximum Air Inlet Pressure
Important Safety Instructions
Read all warnings and instructions in this
manual. Save these instructions.
U82204
334116D
EN
U81923

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  • Page 1 Operation - Maintenance PR70 Servo 334116D Fixed or variable ratio systems. For accurate metering, mixing, and dispensing of two-component materials. For professional use only. Not approved for use in European explosive atmosphere locations. Models U81923 and U82204 3000 psi (21 MPa, 207 bar) Maximum Working Pressure 100 psi (0.7 MPa, 7 bar) Maximum Air Inlet Pressure...

  • Page 2: Table Of Contents

    Enter Data ......26 Graco Information ......48 Prime the Dispense Head .

  • Page 3: Warnings

    Warnings Warnings The following warnings are for the setup, use, grounding, maintenance, and repair of this equipment. The exclama- tion point symbol alerts you to a general warning and the hazard symbols refer to procedure-specific risks. When these symbols appear in the body of this manual or on warning labels, refer back to these Warnings. Product-specific hazard symbols and warnings not covered in this section may appear throughout the body of this manual where applicable.
  • Page 4 Warnings WARNING FIRE AND EXPLOSION HAZARD Flammable fumes, such as solvent and paint fumes, in work area can ignite or explode. To help prevent fire and explosion: • Use equipment only in well ventilated area. • Eliminate all ignition sources; such as pilot lights, cigarettes, portable electric lamps, and plastic drop cloths (potential static arc).

  • Page 5: Component Identification

    Tanks Heated Over / Under Block Main Power Disconnect Inlet for Hardener / Catalyst Foot Switch Inlet for Base / Resin PR70 Servo with Shield Inlet for Flush Agitator Static Mixer Power On / E-stop Switch Mixer Heater Tank Stand...

  • Page 6: Component Identification

    Component Identification U82204 Component Identification U82204 . 2: Typical Installation Key: Tanks/Feed Main Power Disconnect Foot Switch PR70 Servo with Shield Power On / E-stop Switch Human Machine Interface (HMI) Pressure Transducer Material Outlet Dispense Valve 334116D...

  • Page 7: Installation

    NOTICE Never connect to 480V, 3 phase power. Severe equipment damage will occur. NOTE: PR70 Servo without heat requires 240VAC single phase, 15 amps, 50/60 hertz. PR70 Servo with heat requires 240VAC single phase, 40 amps, 50/60 hertz. 334116D...
  • Page 8 Installation 4. Ground the System. 6. Connect the Dispense hoses. Connect the heated hoses to the outlets of the pumps. Plug the heater connections into the proper outlets on the control panel. The equipment must be grounded to reduce the risk of NOTE: The non-drip valves on the ends of the hoses static sparking and electric shock.

  • Page 9: Hmi Navigation Overview

    HMI Navigation Overview HMI Navigation Overview 334116D...

  • Page 10: Change Hmi Values

    HMI Navigation Overview The screens all have the same menu at the bottom that navigates from ones screen to another. NOTE: Some icons may not appear depending on the model. Change HMI Values To edit a value such as flow rate or percentages, press the button.

  • Page 11: Main Menu

    HMI Navigation Overview Main Menu Icon Description Enables the pump drive. When the system is powered up or the drive faults, it needs to be enabled. Disables the pump drive. This is useful for maintenance. It also is need to clear some drive faults; dis- able the drive and then enable it.

  • Page 12: Status

    HMI Navigation Overview Icon Description Used to login to gain access to functions a regular user can't get to. See Appendix B - Logging In and Out for more information. Used to logout. See Appendix B - Logging In and Out for more information. Shows the current user that is logged in.

  • Page 13: Setup Home

    HMI Navigation Overview Setup Home This screen is used to set the home position and adjust the home position based on where the piston begins to enter the metering tube. See Appendix A - Homing Pumps for more information. Icon Description The Enable/Disable Drive push buttons and indicators function the same as the main screen.

  • Page 14: Feed Control

    HMI Navigation Overview Feed Control Icon Description This indicates the tank status: No Levels Used = system is set up without any level sensors, High Level = the high level switch is tripped, Low Level = material is below the low level sensor, Filling = the tank is auto filling, Material Present = tank is loaded, Fill Fault = the amount of time to fill the tank has been exceeded, Accumulator Mode- feed is accumulators, Sensor Fault = the tank sees material on the high level sensor but not on the low level sensor.

  • Page 15: Setup

    For standard PR70's the value is 1.0”. This value may be less for thinner materials to shorten cycle times. This is the lead of the actuator in millimeters per motor revolution. The typical value for the PR70 is These pushbuttons choose the type of PR70, either the fixed ratio frame or the variable ratio frame.

  • Page 16: Temperature U81923 Only

    HMI Navigation Overview Temperature U81923 Only Icon Description These pushbuttons enable and disable the heat circuit for each heat load. The enabled or disabled status for each heat load is displayed underneath. This indicates if heater is heating or not. Red “Heater On”...

  • Page 17: Shot/Flow Setup 1

    HMI Navigation Overview Shot/Flow Setup 1 Icon Description Picks the operating mode for the pumps. Off Mode disables the pumps. Pressure Mode allows the pumps to cycle within a pressure window to deliver a defined shot size at a defined flow rate. Shot Mode allows the pumps dispense a defined shot size at a defined flow rate.
  • Page 18 HMI Navigation Overview Icon Description Displays the position and speed of the servo motor in units of motor revolutions and motor revolutions per second. This starts the cycle. The color is green as long as the pumps are cycling Enter the volumetric ratio of A to B material. This value is used for calculating shot size only, it doesn't change the ratio.

  • Page 19: Shot/Flow Setup 2

    HMI Navigation Overview Shot/Flow Setup 2 Icon Description Mixed Material Pump Pressure Setpoints (psi): For RTM applications, this box displays the current pressure of the mixed material. The user can enter a high limit and low limit. When the machine is set to pressure mode, the pumps cycle until the high pressure limit is reached, then the pumps stop and the mixed material pressure drifts down below the low limit and the pumps begin to cycle again.

  • Page 20: Temperature Gains U81923 Only

    HMI Navigation Overview Icon Description High Limit Shut Down: This is a user settable pressure for the A and B pumps. If during pumping the high limit pressure is exceeded, the high limit trips and the audible alarm sounds. The drive shuts down and pumping stops.

  • Page 21: Scaling

    HMI Navigation Overview Scaling To scale the pressure transducer: • Plug the transducer into a fitting with a gauge to read pressure. • Put the highest value of air pressure (500psi maximum) on the fitting. • Enter the pressure reading from the gauge in the High (PSI) field. •...
  • Page 22 HMI Navigation Overview Icon Description Set the pressure input to the highest value possible and enter the pressure at this point (based on reading a gauge). With the pressure input set to the highest value possible and the pressure value entered, push this push button to enter the high end of the pressure slope.

  • Page 23: Alarm History

    HMI Navigation Overview Set the voltage input at the highest value possible and enter the flow rate desired at this point. With the voltage input set to the highest value possible and the flow rate value entered, push this push button to enter the high end of the flow rate slope. Set the voltage input at the lowest value possible and enter the flow rate desired at this point.

  • Page 24: Alarm Status

    HMI Navigation Overview Alarm Status Icon Description This is used to silence the audible alarm. Some alarms may require an operator to acknowledge the alarm by manually pushing this button. Resets alarm data if needed. Switches the order of alarms from newest to oldest or oldest to newest. Arrow keys Arrow keys page/scroll up or down to see the complete list.

  • Page 25: Startup

    Startup Startup 1. Turn on the main disconnect. 2. Push the power on push button. 3. Open the air valve to dispense valve solenoid (if applicable). 4. Enable the drive: a. On the main screen, press the Disable Drive pushbutton. b.

  • Page 26: Setup

    4. On the Feed Control screen pick the operating mode for the tanks or accumulators. If using the auto fill mode, set the fill timers. 5. If the PR70 is heated, go to the Temperature screen and enter the desired temperature values for the 102a loads being used.
  • Page 27 Setup For Over/Under Block: 8. Select a large size shot. 1. Remove the pins (200) holding the hoses in the over/under block. Pull the non drip valves and hoses (201) out of the block. 9. Hold a waste container at the end of the dispense head (102) and press the cycle pumps button or the footswitch.

  • Page 28: Phasing Adjustment

    Setup Phasing Adjustment 6. Adjust the home position: This step assumes the home position is set at zero from When the machine executes a shot, materials from the factory. If the encoder cable has been unplugged Tank A and Tank B enter the static mixer where they are during shipment, the zero point will need to be reset.
  • Page 29 Setup • If the B side material exits the dispense nozzle 7. Adjust Phasing. before the A side material: a. Use two 13 mm wrenches to break loose the locking nut (302) from the phase adjust- ment screw (303) on the A material side. Hold the phase adjustment screw (303) sta- tionary with a 13 mm wrench.

  • Page 30: Adjust Dispense Valve Snuff Back

    Setup Adjust Dispense Valve Snuff Calibrate Dispense Weight Ratio Back (MD2 Valve Only) At the end of a shot, a small amount of material is drawn back into the static mixer to prevent extra material from being dispensed. If too much snuff back occurs air will enter the static mixer and can travel up into the dis- pense valve.
  • Page 31 Setup The PR70v base unit can dispense volume ratios in the 4. Change the mechanical ratio adjustment to the desired setting (1.19 in the example) as follows. range of 1:1 to 24:1. The range of A to B cylinder size ratios is 1:1 to 12:1.
  • Page 32 Setup 15. Place container “A” under the A material output of the ratio check nozzle. Place container “B” under the B material output of the ratio check nozzle. 16. Press the pump cycle button or the foot-switch to dispense material. 0.5 mm gap 17.

  • Page 33: Pressure Relief Procedure

    Pressure Relief Procedure Pressure Relief Procedure Follow the Pressure Relief Procedure whenever you see this symbol. This equipment stays pressurized until pressure is manually relieved. To help prevent serious injury from pressurized fluid, such as skin injection, splashing fluid and moving parts, follow the Pressure Relief Procedure when you stop spraying and before cleaning, checking, or servicing the equipment.

  • Page 34: Flushing Procedure

    Flushing Procedure Flushing Procedure To avoid fire and explosion, always ground equipment and waste container. To avoid injury from splashing, always flush at lowest possible pressure. Flush equipment only in a well-ventilated area. Do not dispense flammable fluids. Do not turn on heaters while flushing with flammable solvents.

  • Page 35: Shutdown

    Shutdown Shutdown If the machine is to remain idle for an extended period of time, perform the following steps. Systems with an MD2 valve: 1. Place a waste container below the dispense valve. 2. If installed, remove static mixer from the end of the dispense valve.

  • Page 36: Maintenance

    Maintenance Maintenance Schedule Action Schedule Procedure Check Desiccant Dryer (only Daily before use 1. Check the color of the desiccant. installed if chemical is moisture 2. Replace as required. sensitive) Check Tanks Daily before use 1. Check material levels and refill as necessary. 2.

  • Page 37: Flush Pneumatic Air Motor 82/0216/11

    Maintenance Flush Pneumatic Air Motor Lubricate Gear Box of 82/0216/11 Pneumatic Air Motor 01/0368-1/11 NOTE: This section does not apply to pneumatic air motors 24J182 or 24J183. Read all manufacturer’s warning and material MSDS to know the specific hazards of the materials used. Check Oil Level If the motor is sluggish or inefficient, flush it with a Perform the following procedure every two days.

  • Page 38: Troubleshooting

    Before starting any troubleshooting procedures, perform 2. Disconnect AC power from the machine. the following procedure. See PR70 and PR70v Repair - 3. Allow the machine to cool if the machine has a heat Parts manual referenced at the beginning of this manual control option.
  • Page 39 Troubleshooting Problem Cause Solution Material dispensed not correct weight Specific gravity of one or more of the Recalibrate machine. two materials has changed since cali- bration Machine air pressure has changed Readjust air pressure regulator to since calibration value used when machine was cali- brated, or recalibrate machine.

  • Page 40: Kits

    Kits Kits Mixer and Shroud Options Machine Rebuild Kits NOTE: See the PR70 and PR70v Repair - Parts manual Part Description referenced at the beginning of this manual for parts LC0063 Mixer, 3/16 in. (6.5 mm) x 32, 10 Mixers included in each kit.
  • Page 41 Kits Vacuum Kits Refill Kits These vacuum kits contain the parts necessary to attach Refill Kits 256659 and 256660 are designed to turn on a vacuum pump to the tanks. and off a transfer pump as needed to keep the tanks at the proper fluid level.

  • Page 42: Appendix A - Homing Pumps

    This is the point where the pistons are enter- ing the pump tube; the home position. Also note on a variable ratio PR70 at this point the ratio mecha- nism is parallel with the back of the frame.

  • Page 43: Appendix B - Logging In And Out

    Appendix B - Logging In and Out Appendix B - Logging In and Out On power up, the user is the default with limited access 8. If the password is correctly entered, the Startup to screens. To log in to the supervisor level: screen will show the user as supervisor.

  • Page 44: Appendix C - Data Logging U81923 Only

    Appendix C - Data Logging U81923 Only Appendix C - Data Logging U81923 Only When the system is powered up, the Data Logging fea- • B Tank Temperature ture is not available until the Start Data Log button is • B Pump Temperature pressed on the main screen.

  • Page 45: Appendix D - Setting Temperature Gains U81923

    Appendix D - Setting Temperature Gains U81923 Only Appendix D - Setting Temperature Gains U81923 Only NOTICE Adjusting the temperature gains should only be per- formed by a technician knowledgeable in the opera- tion of this machine. Incorrect adjustment of the temperature gains can lead to overheating, erratic temperature control, and/or poor chemical reaction due to poor temperature control.

  • Page 46: Dimensions

    30 in. 12.5 in. 76 cm 32 cm 52 in. 132 cm 21 in. 53 cm Cart Mounted PR70 Servo (Shown with 30 and 60 liter tanks) 81 in. 206 cm 69 in. 175 cm 92 in. 234 cm 82 in.

  • Page 47: Technical Data

    Technical Data Technical Data PR70 with Servo Metric Metering Pump Effective Area 0.124 to 1.49 in. per side 80 to 960 mm per side Maximum Stroke Length 1.50 in. 38.1 mm Minimum Stroke Length 0.23 in. 5.8 mm Volume per Cycle 2 to 70 cc 0.12 to 4.3 in.

  • Page 48: Graco Standard Warranty

    With the exception of any special, extended, or limited warranty published by Graco, Graco will, for a period of twelve months from the date of sale, repair or replace any part of the equipment determined by Graco to be defective.

This manual is also suitable for:

U81923U82204

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