tool removed during cycle fault #2

Tool removed during cycleFault #2

Conditions for settingTool cocked prox switch goes open during cycle AND force on load

cell drops below limit in fault "Force drop during cycle".

Active in Slow Forward and Reverse Revolution processes.

TroubleshootingInstall tool on job and restart. It may be necessary to back off nut

before tool can be reinstalled.

If tool is releasing the nut without the release ring being pulled then see Cocking System Troubleshooting & Repair

Causes for SettingRelease ring pulled prior to cycle being complete

Locking mechanism in tool is releasing inadvertently.

Fast Run Rotation Limit Exceeded Fault #3

Conditions for settingThe nut runner is set up to stop running if it exceeds the maximum number for revolutions allowed. This fault is set if the nut runner reaches this maximum number of revolutions without achieving the pretension target.

Fault setting sequence

If the PLC receives a cycle complete OK from the nut runner controller during the Fast Run process then this indicates the nut runner ran the maximum number of revolutions allowed. Under normal conditions the PLC will drop the run command when the load cell reading reaches the run fast target. This occurs before the nut runner reaches the maximum

number of revolutions so a cycle complete OK signal is not normally sent.


Troubleshooting Pg 1

Troubleshooting on the Vehicle

There are 6 known problems that can set this fault code. The best way to troubleshoot is to run the tool on the calibration stand and follow the troubleshooting on the next page.

1. Park brake cables are disconnected. This allow the nut to run most of the way up the threaded rod with out any tension being developed.

2. The quick connect system fails and allows the nut to pull out of the tool in the middle of the cycle. If this is being reported then see Quick Connect Troubleshooting & Repair.

3. If there is a load cell failure the PLC the nut will be run most of the way up the threaded rod. There will be a large amount of tension in cables and the brakes will be fully locked up. In this case see Tool Load Cell Troubleshooting & Repair

4. If the drive system fails then the nut runner will complete the maximum allowed revolutions but since the drive system is broken the nut will not be run up the threaded rod or only run part way up the threaded rod. In this case see Drive System Troubleshooting & Repair

5. Application parameters in the nut runner controller set up wrong (Setup Issue)6. Tension target force incorrect (Setup Issue)


Troubleshooting Pg 2

Troubleshooting on the Calibration Stand

Run a verification cycle on the calibration stand. • If there is a load cell problem then a different fault code will be set when running

on the cal stand. In this case troubleshoot the fault set on the cal stand.• If a run fast limit fault occurs then:

1. If the nut pulls out of the tool in the middle of the cycle but the tool is still cocked (inputshaft is still retracted) then see Quick Connect Troubleshooting & Repair

2. If the tool releases the nut in the middle of the cycle (inputshaft is not still retracted) then see Cocking System Troubleshooting & Repair

3. If the nut is still locked in the tool then see Drive System Troubleshooting & Repair

If no problems are found then there might be a set up issue1. Parameters in the nut runner controller set up wrong (Setup Issue)2. Tension target force incorrect (Setup Issue)

Tool MisloadFault #4

Conditions for settingThe PLC looks at the load cell force at a specified time after the cycle has

started. If the load cell force is below the target force then the job is stopped and this fault is set.

Causes for Setting1. Nut was not fully engaged into nose of tool before gun was cocked.2. Tool load cell, load cell wiring, or load cell amplifier is faulty3. Drive system failure4. Fault parameters have not been set properly.5. Problem with cables being too long

Tool MisloadFault #4

Troubleshooting

TroubleshootingIf tool is not installed correctly then install correctly and restart job

If this is a new installation or there is a product change then fault parameters have to be developed. See Developing Misload Parameters

If tool was installed correctly and fault parameters have been developed then run a Verification cycle on the cal stand. If you still get a Tool Misload fault then see: Drive System Troubleshooting & Repair.

If a different fault code is set on the cal stand then follow the troubleshooting for that fault code.

Reverse Revolutions Time OutFault #5

Conditions for settingWhen the PLC sends the nut runner the command to run reverse

revolutions a timer is started. If the nut runner does not send back a job OK or a job NOK within 10 seconds then the cycle is aborted and this fault is

set

TroubleshootingCheck power supply to nut runner if power supply is good then Cycle

Power to nut runner controller. If problem persists then see: Troubleshooting Nut Runner Controller

Note: New nut runners and controller must be configured to operate with this system. See Configuring New Nut Runner or Controller

Causes for Setting1. Power failure in the nut runner2. Nut runner, nut runner cable, or nut runner controller failure

Tool Load Cell Maximum Force ExceededFault #6

Conditions for settingThe PLC constantly monitors the load cell force. If the force ever goes

above the maximum allowed target then the cycle stops and this fault code is set.

Troubleshooting

Most likely problem is a faulty load cell wiring or amplifier. See: Tool Load Cell Troubleshooting & Repair.If a new nut runner controller was installed then make sure configuration is correct. See Configuring New Nut Runner and Controller

Causes for Setting1. Tool load cell, load cell wiring, or load cell amplifier is faulty2. Nut runner controller not configured correctly3. Nut runner is running out of control and not responding to PLC

commands

Calibration Load Cell Maximum Force ExceededFault #7

Conditions for settingThe PLC constantly monitors the cal stand load cell force. If the force ever goes above the maximum allowed target then the cycle stops and this fault

code is set. This fault is not active in Auto or Manual Calibration modes.

Troubleshooting

Most likely problem is a faulty load cell wiring or amplifier. See: Cal Stand Load Cell Troubleshooting & Repair.If a new nut runner controller was installed then make sure configuration is correct. See Configuring New Nut Runner and Controller

Causes for Setting1. Cal stand load cell, load cell wiring, or load cell amplifier is faulty2. Nut runner controller not configured correctly3. Nut runner is running out of control and not responding to PLC

commands

Calibration Load Cell Outside Zero Offset RangeFault #8

Conditions for settingWhen zero offset button is pressed the cal stand load cell reading is

greater than 10 Lbs. This is an indication that there is force already applied to the cal stand or the cal stand load cell is faulty.

TroubleshootingIf no force is being applied to the cal stand load cell then see Cal Stand

Load Cell Troubleshooting & Repair

Causes for Setting1. Force is being applied to the cal stand when the zero offset is pressed2. Cal stand load cell, load cell wiring, or amplifier is faulty.3. Cal stand load cell requires re-calibration.

Current Load Cell Reading Too High to Start CalibrationFault #10

Conditions for settingThe PLC looks at the tool load cell force and cal stand load cell when the cycle start button is pressed. If the load cell force is above 10 lbs then the

job is stopped and this fault is set.

TroubleshootingRemove tool from stand, make sure nut is backed off so that no load is on cal stand. Press Fault reset and Zero Offset button. Install tool to cal stand and restart cycle being sure there is no load being applied to the threaded rod. If problem persists then check load cell readings on PV calibration screen. If calibration load cell is reading high then see: Cal Stand Load Cell Troubleshooting & Repair. If tool load cell reading is high then see: Tool Load Cell Troubleshooting & Repair

Causes for Setting1. Load is being applied to tool prior to calibration cycle start.2. Faulty Load cell, load cell wiring, or load cell amplifier.

Current Load Cell Reading Too High to Start Calibration

Fault #11

Conditions for settingTool cocked prox switch goes open during cycle AND force on load

cell drops below limit in fault "Force drop during cycle". Active in Fast Run.

TroubleshootingInstall tool on job and restart. It may be necessary to back off nut

before tool can be reinstalled.

If tool is releasing the nut without the release ring being pulled then see Cocking System Troubleshooting & Repair

Causes for SettingRelease ring pulled prior to cycle being complete

Locking mechanism in tool is releasing inadvertently.

Calibration Mode Jog Forward TimeoutFault #13

Conditions for settingCalibration cycle runs for 20 seconds without achieving target force

TroubleshootingIf tool is properly connected then see: Cal Stand Load Cell Troubleshooting

& Repair

Causes for Setting1. Tool not properly installed on calibration stand.2. Faulty load cell, load cell wiring, or load cell amplifier

Calibration Zero Offset Not Complete Before Pressing Start

Fault #14

Conditions for settingBefore starting calibration the load cells must be zeroed by pressing the “Set Zero Offset” button. If the zero offset is not pressed prior to pressing

the start trigger then this fault is set.

TroubleshootingRemove tool from calibration stand, press “Set Zero Offset” button, reinstall

tool and press the start button

Causes for Setting1. Zero offset not set before starting calibration cycle

Calibration Cycle TimeoutFault #15

Conditions for settingCalibration cycle not complete within the 45 second allowed cycle time

TroubleshootingCycle power to nut runner and restart calibration.

If problem persists the see: Manual Calibration Procedure

Causes for Setting1. Unknown error occurs

Fast Run Tension Not AchievedFault #16

Conditions for settingFast run tension is not achieved within the max allowed cycle time.

Fast run tension and cycle time are configurable in parameter screen

TroubleshootingRun tool on calibration stand and follow fault codes set on cal stand.

Causes for Setting1. Unknown error occurs

Tool not CockedFault #17

Conditions for settingThe PLC looks for the prox switch to be closed before it will allow the cycle to start. If the start switch is pressed without the prox switch being closed

the alarm is sounded for 5 sec and the cycle will not start.

TroubleshootingPull release ring, unclamp anti rotation and reinstall tool and restart job.If tool is properly loaded and cocked and fault still occurs then see Prox Switch Troubleshooting & Repair

Causes for Setting1. The tool is not cocked when the start switch is pressed.2. Defective prox switch or prox switch wiring.

Nut Runner Over Torque WarningFault #18

Conditions for settingIf the nut runner exceeds the maximum allowed torque during the tensioning process it will send a job complete NOK signal to the PLC. If the PLC receives this NOK signal during the tensioning part of the process then the process will continue and the job will be evaluated based on the tension achieved. If the tension is within the acceptable range then the job will be accepted and this warning is set. The warning turns on the yellow stack light and sets a PM required code in the PM screen in the PV but does to fail the job.

Causes for Setting1. Loss of grease in crows foot, angle head, or thrust bearing in end effector2. Broken or worn gears in angle head or crows foot.3. Worn thrust bearing in end effector.4. Damaged threads on nut or threaded rod in cable system5. Internal error in nut runner controller

Nut Runner Over Torque WarningFault #18

Troubleshooting

Troubleshooting

On nut runner panel review the history screen to see what nut runner fault was set during this cycle.

To access the history screen:1. Plug the keyboard and mouse into the USB port on the bottom of the nut runner control

box2. From the top menu select “Navigate” then “Statistics”3. In the statistics screen select the “Chronological History” tab.4. Near the top of the list there should be a job that failed. Find this failed job and look for the

reason it failed. 1. If High Torque fault is set then this is an indication that the angle head, crows foot,

and the end effector thrust bearing require PM. See Drive System PM2. If some other nut runner fault occurred then cycle power to the nut runner controller.

If the problem persists then replace nut runner and nut runner box and send them back for repair.

5. If no fault is found in the Cooper box then see Drive System PM

Nut Runner Over Torque FaultFault #19

Conditions for settingIf the nut runner exceeds the maximum allowed torque during the tensioning process it will send a job complete NOK signal to the PLC. If the PLC receives this NOK signal during the tensioning part of the process then the process will continue and the job will be evaluated based on the tension achieved. If the tension is below the acceptable range then the job will be failed and this fault set.

Causes for Setting1. Loss of grease in crows foot, angle head, or thrust bearing in end

effector2. Broken or worn gears in angle head or crows foot.3. Worn thrust bearing in end effector.4. Damaged threads on nut or threaded rod in cable system5. Internal error in nut runner controller

Nut Runner Over Torque FaultFault #19

Troubleshooting

Troubleshooting






If the problem persists then replace nut runner and nut runner box and send them back for repair.

5. If no fault is found in the Cooper box then see Drive System PM

Reverse Revolutions not CompleteFault #20

Conditions for settingThe nut runner control panel sends a job NOK signal to the PLC during the

reverse revolutions sequence. The cycle stops and fault is set.

Causes for Setting1. Nut runner went over torque2. Some other nut runner fault

Reverse Revolutions not Complete Fault #20Troubleshooting

Troubleshooting






If the problem persists then see: Troubleshooting Nut Runner Controller5. If no fault is found in the Cooper box then see Drive System PM

Tool & Cal Load Cells Excessive Difference Fault #21

Conditions for settingTool load cell reading and calibration load cell reading are more than 100

lbs apart during the calibration cycle.

Causes for Setting1. Calibration load cell unplugged from panel

2. Calibration or tool load cell is severely out of calibration.3. Calibration or tool load cell is faulty

Tool &Cal Load Cells Excessive Difference Fault #21

Troubleshooting

Troubleshooting

• Check to be sure cal stand load cell is plugged in. If unplugged then plug in and rerun cycle.• If the fault occurs before the cycle is started the see Determine which load cell is faulty below. • If load cell is plugged in and you are running verification then Run Calibration Cycle.• If calibration fails the run Manual Calibration Cycle.• If manual calibration fails then see Determine which load cell is faulty below.

Determine which load cell is faulty: • Switch system into manual mode • Verify tool is installed onto calibration stand• Press and hold the “Jog Forward” on the panel view• Continue to run the nut forward until there is between 300 – 500 lbs on cal stand scale.• Compare both the tool load cell reading and the cal stand load cell reading to the scale.• If the tool load cell if far off from the scale then see: Tool Load Cell Troubleshooting & Repair• If the tool load cell if far off from the scale then see: Cal Stand Load Cell Troubleshooting & Repair

Cannot Start Auto Sequence With Other Tool In CycleFault #23

Conditions for settingOnly one tool can run auto cycle at a time. If both tools are in Auto Cycle and one tool is in cycle and then the start button is pressed on the other tool then

this fault is set and the cycle is blocked from starting on the second tool

Troubleshooting

Be sure the second tool is in either Verification, Calibration, Manual Calibrate, or Manual mode before pressing cycle start button.

Final Tension Over Force FaultFault #32

Conditions for settingIf the final tension achieved is over the maximum allowable force this fault

is set

TroubleshootingCheck accept delta limit in the parameter screen this should not be set to less than 50 lbs

See Tool Load Cell Troubleshooting & Repair

If problem is not found then change nut runner controller

Causes for Setting1. Faulty tool load cell, load cell wiring, or load cell amplifier.2. Faulty nut runner controller3. Parameters set up wrong

Final Tension Under Force FaultFault #33

Conditions for settingIf the final tension achieved is under the minimum allowable force this fault

is set

TroubleshootingCheck accept delta limit in the parameter screen this should not be set to less than 50 lbsSee Nut Runner Over Torque Fault #18See Tool Load Cell Troubleshooting & Repair

Causes for Setting1. Nut runner shuts down due to over torque condition2. Faulty tool load cell, load cell wiring, or load cell amplifier.3. Faulty nut runner controller4. Parameters set up wrong

Calibration Failed

Conditions for setting

Load cell gain factor is >1.5 or < .75

During the calibration cycle the PLC the compares the force measured by the calibration stand and the force measured by the tool. It then calculated a gain factor that is applied to the tool load cell so that the force readings

match. If this gain factor is outside to allowable limits then it is an indication that the tool load cell is not working properly.

Causes for Setting1. Tool misbuilt – Load cell installed upside down will trigger this fault2. Faulty tool load cell, load cell wiring, or load cell amplifier3. Faulty cal stand load cell, load cell wiring, or load cell amplifier

Calibration FailedTroubleshooting

Troubleshooting

• Check to be sure cal stand load cell is plugged in. If unplugged the plug in and rerun calibration

If load cell is plugged in then: • Switch system into manual mode • Verify tool is installed onto calibration stand• Press and hold the “Jog Forward” on the panel view• Continue to run the nut forward until there is between 300 – 500 lbs on cal stand scale.• Compare both the tool load cell reading and the cal stand load cell reading to the scale.• If the tool load cell if far off from the scale then see: Tool Load Cell Troubleshooting & Repair• If the tool load cell if far off from the scale then see: Cal Stand Load Cell Troubleshooting & Repair

tool removed during cycle fault #2

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