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Units: lbf-in
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TID memory location: 53
14.5.2 Setting the Tool’s Tubenut Obstruction Detection
Parameters
•
Set value for the obstruction torque just high enough so tool will reliably overcome gear friction
and make it past the obstruction checking zone.
•
Check torque of the stop on obstruction feature by measuring the actual “pinch” torque the
tube nut produces at the start of the rundown when the jaws are open (within the obstruction
detection angle range). This can be done on a semi-tightened joint simulator set for a hard joint,
while auditing the torque.
NOTE:
Gear friction in the tubenut head can greatly affect the ability to reliably detect an
obstruction.
14.5.3 Controller Parameters Affecting Tubenut Pinch Detection
Controller parameters for tubenut operation can be viewed and modified from the
Controller->Tool Setup->Disassembly and Tubenut screen.
•
Obstruction Check Angle
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Angle of travel from start of fasting cycle where, if an obstruction is detected inside this
zone, the tool will stop and the fastening cycle will be aborted.
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Units: Degrees of rotation of the output from Home to where the output is closed.
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Default value: 90 Degrees
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Range: 0 to 180 Degrees
•
Obstruction Check Speed Limit
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Maximum speed output will run during the check for obstructions.
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Decreasing this can reduce the impact force when hitting an obstruction.
NOTE:
Care must be taken increasing the speed above the default value. Too
high of
a value can greatly increase how hard the output will hit the obstruction.
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Units: RPM of the tool output
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Default: 70 RPM
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Range: 1 to 200 RPM
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Obstruction Check Acceleration Limit
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Rate at which the speed of the tool ramps to Obstruction Check Speed.
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Units: kRPM/second
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Default value: 0.5
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Range: 0.1 to 10
14.5.4 Tubenut Homing Start Input Logic Selection
The controller parameter for tubenut homing Start Input Logic can be viewed and modified from the
controller->Tool Setup->Start Input screen.
•
Tubenut Homing Start Input logic:
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Lever action required to start the Home sequence.
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Options:
Home on release and repress of the lever (default)
Home on release of the lever
