YS-e Programming Approaches to Common Scenarios

Scenario

Action

Guidance

When slight adjustments to the display torque results are needed

Adjust Motor Speed parameters

Make adjustments to the MID SPEED & HIGH SPEED to find the combination that delivers a stabilized torque result.  *Note: this varies by application and tool condition

Adjust Pulse Unit Relief Valve

Adjust the output energy of each pulse by making slight mechanical adjustment to the size of the orifice that the hydraulic fluid travels through during each pulse (refer to manual for more detail)

Adjust the BOLT COEFF parameter

Adjust the display torque to the actual torque measured via post-tightening audit by increasing or decreasing the BOLT COEFF parameter. (refer to manual for more detail)

When Prevailing Torque Condition Exists

Increase the AVERAGE NO.

Increase the AVERAGE NO. parameter (Ex, from the default value of 3 to 5).  This will take more pulses into the arithmetic average calculation, ensuring the fastener is truly seated and at final torque when the tightening is completed.

Increase the SKIP NO.

Increase the SKIP NO. parameter  This will let the system ‘ignore’ the number of pulses you specify before making a judgment – ensuring the fastener is truly seated and at final torque when the tightening is completed.

Decrease the MID SPEED

Decrease the MID SPEED (RPM before bolt is seated) to reduce the impact of energy caused during the seating process of the bolt

Increase the SWITCH TRQ

Increasing the SWITCH TRQ delays the timing on when the tool changes to HIGH SPEED, ensuring the fastener is truly seated before the final phase begins.

When the Detection of Abnormal Tightening Conditions is Required

Detect Re-Hit

Set a FREE ANG MIN to ensure the fastener rotates a set amount of degrees before achieving the target torque, 50 degrees is a good starting point

Detect Cross Thread

Set a FINAL ANG MIN to ensure the fastener rotates a set amount of degrees before achieving the target torque.  If too much torque is measured too early in the final rundown, this indicates a cross thread.