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AUTOMATED STORAGE/RETRIEVAL SYSTEMS

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Major Components


Figure 1: Destamat 1224 Major Components

  1. Lower/Upper Rail:
    • Provides the horizontal guide path (X axis) for the SRM
  2. Mast:
    • Provides the vertical guide path (Y axis) for the lift carriage
    • Supports access ladder for the SRM
    • Supports fall safety device
  3. Horizontal Travel Unit:
    • Provides the drive for horizontal movement of the SRM using bidirectional motors (X axis)
  4. Vertical Travel Unit:
    • Provides the drive for vertical movement of the carriage using bidirectional motors (Y axis)
  5. Carriage:
    • Provide enclosure around the Load Handling Device
  6. Load Handling Device (LHD):
    • Moves pallets into and out of the rack using bidirectional motors (Z axis)
  7. On-board Control Panel:
    • Contains wiring for all Input/Output (I/O) components associated with the SRM
    • Contains frequency drives for the motors
    • Contains Interbus for communication with the co-processor
    • Contains power feedback unit (REVCON)
Menu

Software Systems


Figure 2: Computer Control System Overview

Storage Control System

The Storage Control System (SCS):

  1. Receives and sends messages to the Upper Level Control (ULC) systems
  2. Converts the bin location provided from the ULC to an X-Y-Z coordinate to the co-processor to move the SRM
  3. Provides screen visualization and control

Upper Level Control/Material Handling Computer

The ULC determines bin location and directs the SRM movement through the SCS, in the form of missions. When a mission is complete, the SCS communicates this to the ULC. The ULC notifies the Strategic Inventory Management System (SIMS) of the pallet location. Through the use of the system, product inventory is maintained.

Pallet Flow Description

This section provides an overview of how pallets are received, stored, and transferred into the rack for storage and picking.

System Layout


Figure 3: System Layout

Associated Terms and Definitions


Figure 4: Typical Storage and Retrieval Machine Input/Output Area

EP

Input pallet position.

AP

Output pallet position.

BK-25 Pallet Conveyor

Chain-driven conveyor used to move pallets. This conveyor is located at:

Automated Guided Vehicle (AGV)

Unmanned guided vehicle used to move a pallet load from one location to another.

Sizing Station

Area where the pallet loads are profiled (weight and dimension).

Pallet tag bar code is scanned.

AGV ID is scanned.

Bar code information is provided to the ULC for coupling the pallet load to the AGV.

Pallet Hospital

Area where a rejected pallet is taken for corrective action before being re-inducted into the system.

Receiving Area

Personnel in the receiving area take delivery and palletize product destined for the Destamat 1224's located in the hi-rise warehouse. The pallet is inspected for damage, the load is positioned on the pallet to conform to proper configuration, and a label is applied to the load. The pallet loads are then placed on the BK-25 conveyor, which indexes the load forward to the AGV pick-up location. When the load reaches the pick-up point a signal is sent to the ULC, via a photo eye. The ULC then schedules an AGV to pick up the load.

Sizing Station

The AGV picks up the load from the BK-25 conveyor and proceeds to the sizing station.

At the sizing station:

  • The load is weighed and the dimensions are checked.
  • The pallet tag barcode and the AGV ID are scanned and this information is sent to the ULC which couples the load to the AGV.

If the load is within the preset parameters and an expected receipt is on file, the AGV proceeds to the assigned SRM aisle. If the load is not within the parameters or there is no expected receipt on file, the load is sent to the pallet hospital. After corrective actions are completed, the load is re-introduced into the system through the Strategic Inventory Management System (SIMS).

EP: Storage and Retrieval Machine Input

The AGV takes the pallet to BK-25 input conveyor at one of eight aisles. If an expected receipt is on file, the load is stored in a location. The load is moved to the outbound (AP) conveyor if:

  • Expected receipt is not found.
  • Pallet tag cannot be read.
  • Load is at the incorrect aisle.

The load is them transported by AGV to the pallet hospital and SIMS is notified of the unknown load.

Storage and Retrieval Machine Operation

The load is positioned for SRM pickup at the SRM input position (EP).

The BK-25 lifting table rises, creating a fork window for the SRM to pick up the load. When the load blocks the photocell on the input conveyor, the conveyor control sends the load present information to the ULC.

When the load is in position and the lift table is up, the BK-25 conveyor Programmable Logic Controller (PLC) turns on an output. The output is wired to the SRM and indicates that it is safe to pick up the pallet.

The SRM must be in automatic mode and the Storage Control System (SCS) computer set for remote operation before the ULC will issue a mission command via the Ethernet. This mission indicates that the SRM can pick up the load and move it to the storage location selected by the ULC. The SCS will execute the mission upon receipt from the ULC.

The SRM moves horizontally and vertically to reach the input position. When the SRM arrives at the input position, the SRM will verify that the signal from the BK-25 conveyor PLC is available indicating it is safe to pick up the pallet.

When the safe signal is recognized, the Load Handling Device (LHD) extends below the pallet, lifts it to a bin high position and then retracts back to the center position. When the LHD moves off-center for the pick up, the LHD centered signal to the conveyor controls is turned off and prevents the BK-25 conveyor from indexing the next load forward.

During the lift to the bin high position, the SRM checks the weight of the load to insure it does not exceed the 2000 pound weight limit, If the pallet weight exceeds 2000 pounds, the pick up cycle stops and a fault is issued to the ULC. Manual intervention is required to correct the fault and remove the overweight load from the system.

If the load is less than the 2000 pound weight limit, the LHD retracts to the center position with the pallet on board. When the LHD returns to center, the LHD centered signal turns back on indicating that the SRM input position on the inbound conveyor is available for the next load.

If the load destination is a pick face location, SIMS will direct the ULC through the expected receipt, where to place the load. If the load is designated for a storage location through the expected receipt, the ULC will determine the storage location of the load.

Once the SRM has picked up a pallet load and no fault has occurred, it moves to the assigned location. Before the LHD cycles, the SRM checks the location to verify that it is empty.

If the location is empty, the LHD will extend, deposit the pallet, and retract to center.

If the location is occupied, a Full Bin Logical Error is generated and sent to the ULC. When a Full Bin Logical Error is identified, the ULC directs the SRM to store the load into an alternative location and then notifies SIMS. After the pallet has been deposited into a location and the LHD has returned to center, the SCS sends a mission complete to the ULC and waits for its next mission.

Storage and Retrieval Machine Load Removal

When a load is to be removed from the system, SIMS sends an expected receipt to the ULC.

The ULC sends a mission to the SRM to remove the load from a location and deposit the load at the AP. The SRM travels to the location, picks up the load, and travels to the AP. At the AP the forks will extend and deposit the load. When the forks are returned to center a mission complete message is sent to the ULC. The SRM is now ready for the next mission.

When the load arrives at the AP the load is indexed forward to the AGV pick up position.

When the load reaches the AGV pick up location the ULC registers a pick up call and assigns an AGV to pick up the load. The assigned AGV travels to the pick up point and picks up the load.

The AGV then travels to the required destination and deposits the load.

Other System Functions

Additional system functions:

  • Bin location management.
  • Internal shuffle of product to access loads located in far bins.
  • Storage and retrieval of loads designated for conventional full case and split case modules.
  • Empty pallet removal.
  • Trash receptacle removal.

General Safety

This section describes safety precautions that should be followed before, during and after maintenance and troubleshooting tasks.

Storage and Retrieval Machine Safety Information

The rail-guided handling equipment is built according to the latest state-of-the-art engineering, the currently applicable safety rules, and has passed manufacturer's safety testing.

The rail-guided handling equipment has been delivered to the owner by Siemens Dematic in technically perfect condition and has passed an acceptance test.

The documentation supplied by Siemens Dematic concerning operation and maintenance of the rail-guided handling equipment must be adhered to during equipment operation. Siemens Dematic is not liable for damage attributable to incorrect handling or non-compliance with the guidelines governing operation and maintenance.

Changes to the factory settings made by Siemens Dematic may only be performed after the express written permission of the manufacturer has been granted.

It must be ensured at all times that the rail-guided handling machines are only operated when in perfect working order, that the operating personnel are aware of the hazards, and that it is operated in accordance with its intended purpose.

Training

In addition to the initial training of personnel (when equipment is first placed into operation), continuous training is required on a regularly scheduled basis. The purpose of continuous training is to reinforce the importance of safe work practices by ALL employees, including new hires and transfers working with or around the equipment.

The customer is responsible to provide training for employees to ensure that they are knowledgeable in the safe operation and maintenance practices of the equipment.

Guidelines for Handling the Switch Key System

When performing maintenance work, all personnel must strictly comply with the regulations governing the handling of the switch key system.

A single switch key is assigned to each SRM in the switch key system. If several SRMs are used in an installation, each SRM has its own switch key with a different lock.

The switch key of an SRM operates the following locks:

  • AUTOMATIC switch on the stationary installation control cabinet
  • MANUAL CONTROL switch on the control panel of the on-board control cabinet
  • MANUAL CONTROL switch located in the maintenance cab
  • Aisle access doors

Spare keys must be kept under lock and key and must not be accessible under normal circumstances.

Warning

For safety reasons, only one switch key may ever be in use per SRM.

The switch keys are used to determine the mode of operation (automatic, manual or emergency) and to turn off the SRM. The SRM must be switched off and the switch key removed before switching to a different mode of operation.

CAUTION

The switch key can only be removed from the respective switch lock once the switch has been turned to the OFF position. There is a danger of key breakage.

Depress the lock cylinder, turn the switch key back to the OFF position, and remove it.

The access doors to the rack aisles are fitted with door contacts. The SRM is automatically switched off when an aisle door is opened.

Authorized personnel must comply with the following rules when handling the switch keys:

  1. Ensure that only one key is in circulation per SRM.
  2. Ensure that no personnel are inside the gated area before placing the SRM in automatic mode.

NOTE

Different locks for the SRM and doors can be used as a key system. These keys should be joined to each other by a welded ring.

Operational vs. Maintenance Procedures

The following procedures must be followed prior to Manual Operation or Maintenance of the equipment. These steps apply to one or multiple SRM(s) depending on its application.

  1. If the SRM(s) is currently operating and performing missions, suspend all operations of the SRM(s) from the Host Terminal. See the Operations Training Guide for more information.
  2. After the SRM(s) has finished parking at the proper location and SIMS has confirmed the completion of the missions(s), turn the SRM Automatic SIR key tumbler from the 1 position to the 0 position and remove the key from the tumbler.
    Figure 5: End-of-Aisle Operator Control Panel
  3. Determine if the interruption of automatic operation is for Maintenance (servicing) or Manual Operation (fault recovery).

If

Then

Maintenance

Continue to section 2.4

Manual Operation

Continue to section 2.5

Operational Steps Prior to Maintenance

If the multiple SRMs are attached to a single SCS, follow these steps unless all SRMs on the SCS are to be serviced or shutdown.

  1. After the SRM has been removed from automatic operation, click the SRM icon on the System Overview screen for the SRM that is to be serviced (Figure 6). The SRM Status screen appears.
    Figure 6: System Overview screen
  2. Click the Interbus 3 button (Figure 7). The SRM Status screen appears.
    Figure 7: SRM Status screen
  3. Select Disconnect, then click (Figure 8). The System Overview screen appears.
    Figure 8: Change SRM Interbus Status screen
  4. The selected SRM will turn grey. This is an indication that the Interbus has been disconnected for that SRM and it is safe to disconnect power from the aisle.

NOTE

Disconnecting power to the SRM without disconnecting from the Interbus will cause an Interbus fault on all SRMs associated with that co-processor. This will cause the operation of all associated SRMs to be interrupted.

  1. Disable the AGV pick and drop stands on the Host Terminal screen (follow the appropriate procedures as stated in the Host Operating Guide), to minimize the AGV traffic to the SRM aisle while it is out of service.
  2. If multiple SRMs are to be serviced, repeat steps 1-5 for each SRM.

After all of these steps have been completed for the desired SRMs, continue to the next section.

Lockout/Tagout Procedures

The primary purpose for a lockout/tagout procedure is to protect workers from injury caused by the unexpected energizing or start-up of equipment.

The rule requires that energy sources for equipment be turned off or disconnected, and that the switches are locked and labeled with a warning tag. This ensures that the equipment has been shut down for service or maintenance and will not reactivate while employees are working on it. The regulation defines that service and maintenance includes "lubrication, cleaning or unjamming of machines or equipment," among other things.

It is important to note that the lockout/tagout procedure is considered to be just one element of the control procedure for hazardous energy. The employer is responsible for providing procedures that include de-energizing of equipment, isolation of energy sources, verification that equipment has been de-energized, and complete diffusion of stored energy.

The standard requires an ongoing program of control procedures and employee training by the employer to ensure that the purpose and functions of energy controls are understood and applied. Lockout/tagout should take place before any service or maintenance work begins.

  1. Alert operators of power disconnection.
  2. Switch off the Main Disconnect of the -X100 panel for the SRM to be serviced. If all SRMs are to be serviced, then Switch off the Main Disconnect on the -X20 (Figure 9).
    Figure 9: Main Control Panels -X20 and -X100
  3. Lockout the Disconnect on the SRM -X100 panel using the proper lockout/tagout procedures and OSHA approved safety devices (Figure 10).
  4. Attach lockout tags to each lock indicating name of service person, date, and purpose of the lockout.
  5. Use padlocks with only one key for all lockout purposes. If duplicate keys exist, they must be kept under strict management supervision.
  6. Check for stored energy. Test the equipment to be sure that it will not operate.

The service person who locks and tags a machine must be the one who unlocks the machine.

Never remove a lock or tag that is not yours.

Never lock or tag equipment for another person.

If a lock or tag is left on during a shift change, leave it in lockout/tagout condition. Assume the equipment is locked or tagged for a good reason. Contact your supervisor for further direction. If work is done in shifts and the work is not completed, the new shift employees should install their locks or tags while the existing shift is removing theirs. When possible, the new shift should install their locks before the existing shift removes theirs so nothing is ever unlocked.


Figure 10: OSHA Approved Lockout/Tagout Devices

Safety Tips Prior to Servicing

  • ALWAYS stop the equipment before attempting to clear jams, entering the aisle, or performing any maintenance operations to the equipment.
  • Whenever possible, service the equipment with the power OFF. This can be done by completing the following:
    • Padlock the control cabinet disconnect switch in the '''''OFF''''' or 0 position.
    • Utilize the OSHA compliant lockout/tagout devices at all pertinent disconnect switches.
    • Secure proper tools and wiring diagrams. Be sure that an adequate voltage test instrument is available.
  • READ any instructions or test procedures BEFORE attempting them.
  • Inform personnel in the area that maintenance tasks are being performed.

Before beginning work, ensure that power is actually removed by checking various points to ground with a test meter. Although power to the device being serviced is removed, some points of the device may be energized due to interconnections with other equipment. Such areas are appropriately marked.

DANGER

Yellow wires in a control cabinet remain energized even when the disconnect switch is turned "OFF". Use extreme caution when servicing a control cabinet with an outside power source.

If maintenance must be performed with power in the ON or 1 position, be sure the following precautions are taken:

  • Work in pairs, with the location of the main disconnect switch known to each worker.
  • Use correctly insulated tools, gloves, and an insulated mat, especially in damp areas.
  • Inform personnel in the area that servicing is being done. Accidentally removing power to equipment can also cause injury.
  • Use correct test instruments. Avoid gimmicks such as jumpers and bulb testers.

Safety Tips During servicing

While working never forget that other pieces of equipment can be involved when a particular START or STOP pushbutton is pressed. Before energizing '''''ANY''''' element of the system, it is essential to:

  • Inform all personnel in that area.
  • Confirm that all other systems are STILL disabled.
  • Stay clear of all chain drives, motor couplings, and belts during equipment operation.
  • Wear safety helmets at all times when performing maintenance duties.
  • NEVER wire or tape down limit switches.
  • Be alert to any deficiency of the equipment.
  • Use eye protection (goggles or face mask) if air pressure is required for any cleaning task. Safety goggles must be used when grinding, drilling or cutting.

NOTE:

Compressed air supply should be 30 PSI or less.

  • DO NOT leave tools or parts where they may be a safety hazard or obstruction.
  • Be certain that ALL personnel are clear of any moving parts before starting the AS/RS system.
  • Report all accidents resulting in personal injury or damage to the equipment to the Supervisor.

DANGER

In the unlikely event of electrocution, do not touch the victim until the high voltage circuit is broken

Safety After Servicing

  • When servicing is complete, replace test equipment and tools. Remove and properly dispose of any damaged components and close all panels.
  • DO NOT leave tools or parts where they may be a safety hazard or obstruction.
  • Lastly, remove all lockout/tagout equipment and inform personnel in the area that servicing is complete.

Manual Operation

The manual control mode can be selected in order to correct simple faults, such as overhanging goods, loads not picked up centrally or excessive loads, without having to deactivate the safety devices of the machine.

The manual control mode is started from the on-board control panel. Commands are provided by means of a control terminal. See the Operations Training Guide for more information.

WARNING

The manual control is performed within the enclosed racking area and therefore requires special safety precautions. The operating personnel must be authorized to use the manual control mode and have received appropriate instruction.

The SRM is supplied with 480VAC and 120VAC via the power rail. Extreme caution needs to be taken around the power rail and the SRM. There is possibility of electrocution.

Keep all conductive devices away from the power rail and SRM components. Only trained and knowledgeable personnel are allowed near these areas.

Emergency Control Mode

The emergency control mode is activated from the on-board control panel. It is operated via operating elements located in/on the control cabinet.

When operating in Emergency control mode design safety features are removed from the system. This mode should only be used in extreme situations.

WARNING

The Emergency control mode may only be used by authorized personnel. Authorized personnel must therefore estimate the safety risks for themselves and others when operating the SRM in emergency control mode.

If the emergency control mode is used to rescue operating personnel from the operator position, for example in the event of unconsciousness, the operator of the emergency control mode is responsible for the safety of the person in the operator position.

The SRM is supplied with 480VAC and 120VAC via the power rail. Extreme caution needs to be taken around the power rail and the SRM. There is possibility of electrocution.

Keep all conductive devices away from the power rail and SRM components. Only trained and knowledgeable personnel are allowed near these areas.

Interbus Device Identification

The Interbus system is the communication system for control of the SRM. The Interbus collects all the input and output data of the SRM and sends this information to the co-processor. The Interbus has various devices arranged in series. When a fault within the Interbus occurs, the device that has malfunctioned is indicated at the SCS through the co-processor.

To troubleshoot the Interbus, the maintenance person must be able to identify the devices using the electrical drawings located in the Operation and Maintenance Manual.


Figure 11: Interbus (IBS) Assembly

When a fault occurs:

  1. Read the fault at the SCS or the Pi-touch control panel.
  2. If the fault is an Interbus fault with a device failure, the device number will be displayed on the Error Description screen.
  3. Using Figure 16 locate the device number. This information can also be found in the electrical drawings provided in the Operation and Maintenance Manual.
  4. Identify the device that needs to be inspected for problems.

  1. Once the cause has been corrected the machine can be placed back in operation.

NOTE

If more than one fault in the Interbus system has occurred the Interbus may not connect properly and another fault will occur. Since this is a series system the first fault in line is reported to the SCS. Only after the original fault has been cleared and the system is returned to operation can the SCS see down stream of the first Interbus fault. Any additional faults can now be detected.

Preventive Maintenance

Preventive maintenance of the SRMs is critical for the safe and efficient operation of the units. This section assists the customer in administering a maintenance program and provides a sample PM schedule.

This section contains information on the following sections of the Operation and Maintenance Manual.

  • Preventive Maintenance:
    • Overview of the preventive maintenance system
    • Safety procedures specific to the SRM
    • Checks prior to start-up
    • Torque specifications for mechanical fasteners
    • Lubricant use and handling
  • Preventive Maintenance Checklist:
    • For each major component there is a checklist of required maintenance actions
    • Time schedule of maintenance requirements
    • Forms for recording completed maintenance
  • Maintenance Procedures:
    • Procedures for maintenance requirements
    • Procedures for component repairs

Checks Prior to Start-Up

The following checks will be conducted prior to SRM start-up:

  1. Visually inspect the aisle for any obstructions and remove them.
  2. Ensure that all personnel are outside the gated area of the SRM.
  3. Ensure that only one set of keys are available at each SRM. The key set will be on one key ring to prevent any two keys from being used at one time. The key ring should have the following keys attached:
    • Auto/Manual key
    • Emergency key
    • Aisle door key
  4. Check the associated conveyor equipment at the input and output areas for proper operation.

Torque Specific

A table is provided for the correct torque specifications for all mechanical fasteners in the Operation and Maintenance Manual.

Using the Torque Charts

  1. Determine the type of fastener that is being used.
  2. Use the fastener type information to determine the friction coefficient.
  3. On the torque graph find the correct thread size.
  4. Select the proper friction coefficient.
  5. Move to the right until you find the corresponding torque for the fastener property class.
  6. The torque values are in metric. To use an English torque wrench it is necessary to convert the units.
    • In/lb from Ncm (Newtons/Centimeter) multiply by 0.08851.
    • Ft/lb from Ncm multiply by 0.00737.
    • Ft/lb from Nm (Newton/Meter) multiply by 0.7376.

Lubricant

Follow the lubrication guide in the Operation and Maintenance Manual.

Excessive lubricant may cause the catching device to fail in the event of an emergency. Vertical guide rails must remain free of grease and oil.

Dampen a clean lint-free rag with lubricant and wipe the vertical guide rail only as required to prevent rust. Remove any excessive oil using a dry lint-free rag.

Use of Preventive Maintenance Checklist

The preventive maintenance checklist provides a list of all maintenance requirements for a major component and the time frame in which the maintenance should be conducted. The maintenance schedule is outlined in the following chart.

Code

Interval

W

Weekly (50 Hrs)

M

Monthly (200 Hrs)

Q

Quarterly (500 Hrs)

SA

Semi-Annually (1000 Hrs)

A

Annually (1800 Hrs)

NOTE

The recommendations are based on a 50 hour week. Facilities that run the SRMs greater than 50 hours a week will have to adjust the schedule to meet the operating requirements. For example, an SRM that is running 100 hours a week should have the monthly PM check performed twice a month.

  1. Each major component is assigned a section number. For example: section 1.1 Bottom Carriage.
  2. The maintenance checklist is divided into two categories:
    • Lubrication: Provides points on the SRM that require periodic lubrication.
    • Maintenance: Provides checks and adjustment for components associated with the SRM,
  3. The PM checklist has the following columns:
    • Number: Assigned number for the PM check.
    • Location: The component the PM check is to be conducted on.
    • Action: Brief description of the PM check.
    • When: The time interval for the PM check.
    • Counter reading: The counter reading at the time the PM check was conducted.
    • OK: Check if the PM check was completed satisfactorily.
    • Not OK: Check if the PM check was not completed satisfactorily.
    • Notes: Record abnormalities found and corrective action that was taken to correct the abnormality. This should be reflected in the history of the SRM.

Catch Device

The catch device is a piece of safety equipment designed to mechanically stop the carriage in a free fall situation.

A speed governor is attached to the catch device through a cable which actuates a mechanical wedge located inside the catch device. The combination of the wedge and knurled roller is clamped against the guide rail to stop the carriage.

The catch device can be actuated by the following:

  • Chain breakage
  • Over speed of the vertical drive
  • Gear box shaft shear
  • Motor brake failure
  • Improper maintenance of the actuating cable

Catch Device Maintenance

The catch device is the last line of defense for a free falling carriage. Maintenance of this device is crucial for proper operation. All maintenance procedures for the catch device must be performed every 1800 hours of operation. See the Operation and Maintenance Manual for preventive maintenance requirements.

The catch device must be overhauled every ten years in conjunction with the SRM overhaul.

WARNING

The catch device internal components (wedge and knurled roller) need to be replaced after three catches. Failure to replace these components reduces the effectiveness of the catch device.

Catch Device Recovery

After a catch device has been actuated the carriage is mechanically bound to the mast guide rail. Trying to lift the carriage with the motor will not release the catch device. The following procedure must be followed to release the catch device.

Carriage Ejection Procedure and Equipment

The following equipment will be needed for carriage ejection:

  1. Guide rail clamping device with pressure screws
  2. Hydraulic hand-operated pump
  3. Safety harness
  4. Torque wrench
  5. Metric socket set
  6. Pi-touch control panel

The following procedure is used to eject the carriage:

  1. Determine the cause for the catch device actuation.
  2. Correct cause for catch device actuation.
  3. Check hoist chain for slack. If slack exists, tighten the chain using the lifting motor.
  4. Don the proper safety harness, to ascend to the carriage cab.

  5. Figure 12: Carriage Ejection

  6. Place the clamping device (1) on the guide rail below the roller bracket. Ensure there is sufficient room for the hydraulic cylinder (Figure 12).
  7. Tighten the pressure screws (3) to 300 Nm. Use the torque charts in the Operation and Maintenance Manual to determine the Ft/Lb conversion.
  8. Place the hydraulic cylinder on top of the clamping device (2).
  9. Start lifting the carriage using the hydraulic pump. The carriage needs to be lifted 30 mm or until the catching device resets
  10. NOTE

    Depending on how hard the carriage came to a stop, the hydraulic pump may not be able to lift the carriage. In this case it is required to BUMP the lift motor in the UP direction while using the hydraulic pump.

  11. When the catch device is free, ensure the governor latching device is returned to normal operating position (not locked in place and free moving).
  12. Slightly lift the carriage in slow manual mode.
  13. Remove the clamp device (1).
  14. Using the Pi-touch, manually move the carriage to the lowest position in slow speed.
  15. Perform all preventive maintenance checks on the catch device.
  16. Since the catch device mechanically binds on the guide rail, scarring will occur along the catch area of the guide rail. Remove burrs from the guide rail using sandpaper and hand held files.
  17. WARNING

    Never use electric grinders on the guide rail. This may cause irreparable damage to the guide rails.

  18. Move the carriage over the area in slow speed. If there is no indication of any abnormal ride along the guide rail, repeat the movement in normal speed. If no faults occur the SRM can be placed back in operation.
  19. Contact the company for inspection by an ASRS technician.