Glossary of programming terms and parameters for Yokota YZ-T(H) Battery Shut-Off Pulse

This article includes terms and parameters used within the Yokota YZ-T(H) Battery Shut-Off Pulse tool documentation and interface, along with the explanation of what these terms mean and how they are significant to the user.

 NOTE: Links are provided throughout the list below to help provide additional explanation to related topics.

 TERMS & PARAMETERS 

VALUE

• A value at which the tool will shut off once it is reached during the rundown of the fastener

TIGHTENING VALUE

• The resultant value of a rundown upon completion of the tightening

TIGHTENING PULSE NO.

• The total number of pulses achieved between the DISPLAY START VALUE and tool shut-off

DISPLAY START VALUE

• Threshold value to begin the judgement of a tightening for OK or NG. 
• Below this value, no judgement is made. 
• This is similar to a cycle start or torque threshold (IR) value. 

SWITCH VALUE

• The threshold point during the tightening where the tool 'switches' from rundown speed (MID SPEED) to the final tightening speed (HIGH SPEED)
• This is similar to shiftdown point (IR), but in this case - the speed increases.

CUT VALUE

• The value at which the tool with shut off during the rundown
• This is the target value that you are trying to achieve with each rundown

MAX VALUE

• If the tool detects a value that is above the MAX VALUE, before the AVERAGE NUMBER value reaches the CUT VALUE , the tool will shutoff at that point and show rundown NG.

LOW SPEED

• This is the speed (RPM) at which the tool will run when the tool trigger is partially depressed (half-trigger pull)
• This can be used as an engagement step to help 'find' the fastener before MID SPEED starts the rundown
• NOTE: This is valid for FWD and REV rotation, based on the settings of the tool

 MID SPEED

• This is the speed (RPM) at which the tool will run when the tool trigger is fully depressed until the tool reaches SWITCH VALUE
• NOTE: This is only true in FWD rotation; REV rotation does not use MID SPEED - only LOW SPEED (half trigger) and HIGH SPEED (full trigger)

HIGH SPEED

• In FWD direction, this is the speed (RPM) at which the tool will run, starting at the SWITCH VALUE and continuing until the CUT VALUE is achieved
• In REV direction, this is the speed (RPM) at which the tool will run anytime the trigger is fully depressed

 MIN PULSE

• The minimum number of pulses to be achieved for tightening to be judged for OK or NG.
• If the minimum number of pulses is not achieved, the tightening will be NG.

 MAX PULSE

• The maximum number of pulses to be achieved for tightening to be judged for OK or NG.
• If the maximum number of pulses is exceeded, the tightening will be NG.

 AVERAGE NUMBER

• This is the number of pulses the system should take the arithmetic mean (average) of values from for judgement of the tightening. 
  • Example: If the value entered in AVERAGE NUMBER was '3'- the system would then average the measured values of 3 consecutive pulses before making an OK or NG judgement.

SLOW ERROR PULSES

• The total number of pulses in excess of the preset number (70 is the present value - fixed)
• This calculation also includes any pulses less than the DISPLAY START VALUE

VALUE JUDGEMENT BEFORE AVERAGE

• If the tool detects a value that is above the MAX VALUE, before reaching the AVERAGE NUMBER when it starts the averaging calculation, the tool will shutoff at that point and show rundown NG.