Troubleshooting  Mechanical protectors

Common to TGB series and TGX series

1Overload occurred but not activated
2Shock Guard is activated frequently during normal operation
3An overload signal is output but Shock Guard is not activated
4After an overload occurred, the reset operation is performed but not reset
5Backlash occurred from Shock Guard

Common to TGE series and TGF series

6Overload occurred but not activated
7Shock Guard is activated frequently during normal operation
8An overload signal is output but Shock Guard is not activated
9After an overload occurred, the reset operation is performed but not reset
10Backlash occurred from Shock Guard

TGM Series

11Overload occurred but not activated
12Shock Guard is activated frequently during normal operation
13An overload signal is output but Shock Guard is not activated
14After an overload occurred, the reset operation is performed but not reset
15Backlash occurred from Shock Guard

TGK Series

16Air supplied to Shock Guard, but the clutch does not turn on
17Shock Guard does not activate when overloaded
18No overload, but Shock Guard activated
19After overload or clutch off, clutch does not turn on even though the reset operation is performed
Answers

Common to TGB series and TGX series

1Overload occurred but not activated
Cause 1Set torque too high Solution Gradually increase the set torque from a lower torque and readjust to a torque suitable for the machine
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2Shock Guard is activated frequently during normal operation
Cause 1Insufficient set torque Solution Increase torque according to the torque adjustment instructions
Cause 2Torque reduced due to high number of operations Solution Replace Shock Guard
Cause 3Loose adjustment nuts Solution After adjusting the torque, press the nut and fix it with the set screw
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3An overload signal is output but Shock Guard is not activated
Cause 1Proximity sensor gap adjustment failure Solution Adjust the proximity sensor gap
Cause 2Faulty proximity sensor Solution Replace proximity sensor
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4After an overload occurred, the reset operation is performed but not reset
Cause 1High reset rotation speed, so it operates again even if it reset once Solution Reduce the reset rotation speed (Manual reset )
Perform inching operation
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5Backlash occurred from Shock Guard
Cause 1The set torque is close to the normal operating torque of the equipment, so Shock Guard starts to operate at peak load and appears to backlash Solution Set torque as high as possible within the range that can protect the equipment.
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Common to TGE series and TGF series

6Overload occurred but not activated
Cause 1Set torque too high Solution Gradually increase the set torque from a lower torque and readjust to a torque suitable for the machine
Cause 2Mounting bolts for sprockets etc. are too long, so the bolts and the flange of hub come into contact and Shock Guard does not work Solution Change to appropriate bolt length
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7Shock Guard is activated frequently during normal operation
Cause 1Insufficient set torque Solution Increase torque according to the torque adjustment instructions
Cause 2Torque reduced due to high number of operations Solution Replace Shock Guard
Cause 3Loose adjustment nuts Solution After adjusting the torque, press the nut and fix it with the set screw
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8An overload signal is output but Shock Guard is not activated
Cause 1Proximity sensor gap adjustment failure Solution Adjust the proximity sensor gap
Cause 2Faulty proximity sensor Solution Replace proximity sensor
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9After an overload occurred, the reset operation is performed but not reset
Cause 1High reset rotation speed, so it operates again even if it reset once Solution Reduce the reset rotation speed (Manual reset )
Perform inching operation
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10Backlash occurred from Shock Guard
Cause 1The set torque is close to the normal operating torque of the equipment, so Shock Guard starts to operate at peak load and appears to backlash Solution Set torque as high as possible within the range that can protect the equipment.
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TGM Series

11Overload occurred but not activated
Cause 1Set torque too high Solution Gradually increase the set torque from a lower torque and readjust to a torque suitable for the machine
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12Shock Guard is activated frequently during normal operation
Cause 1Insufficient set torque Solution Increase torque according to the torque adjustment instructions
Cause 2Torque reduced due to high number of operations Solution Replace Shock Guard
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13An overload signal is output but Shock Guard is not activated
Cause 1Poor adjustment of limit switches Solution Adjust the installation position of the limit switch
Cause 2Faulty limit switches Solution Replace limit switches
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14After an overload occurred, the reset operation is performed but not reset
Cause 1High reset rotation speed, so it operates again even if it reset once Solution Reduce the reset rotation speed (Manual reset )
Perform inching operation
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15Backlash occurred from Shock Guard
Cause 1The set torque is close to the normal operating torque of the equipment, so Shock Guard starts to operate at peak load and appears to backlash Solution Set torque as high as possible within the range that can protect the equipment.
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TGK Series

16Air supplied to Shock Guard, but the clutch does not turn on
Cause 1Regulator air pressure set too low Solution Adjust regulator air pressure setting
Cause 2Air leakage at seals Solution Replace seals
Cause 3Incorrect air pipework Solution Check air pipework
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17Shock Guard does not activate when overloaded
Cause 1Regulator air pressure set too high Solution Adjust regulator air pressure setting
Cause 2Due to high rotation speeds, air in the cylinder is not completely discharged when overloaded Solution Install a quick exhaust valve near the air supply port of Shock Guard
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18No overload, but Shock Guard activated
Cause 1Poor adjustment of limit switches Solution Adjust the installation position of the limit switch
Cause 2Faulty limit switches Solution Replace limit switches
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19After overload or clutch off, clutch does not turn on even though the reset operation is performed
Cause 1High reset rotation speed, so it operates again even if it reset once Solution Reduce the reset rotation speed
Perform inching operation
Cause 2The normal load is lower than the reset torque, so the driven side rotates without the clutch being turned on completely Solution Lower the air pressure setting, turn on the clutch once, then return to the normal pressure setting before driving
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