Dr. Livingstone, I Presume WELDWISE 2400 - Manual (Page 71)

0433-INS-400 Rev. E
6-25
Tolerancing Screen
When new welds are compared to the master, they are given a certain amount of “forgiveness” relative
to the values in the master. This is because even good welds aren’t exactly alike. The amount of
forgiveness is referred to as “tolerance” and is implemented by high and low limits relative to the
master. Default tolerances (set in the Tolerance Defaults screen) are installed when a master is made
and are set to be very forgiving. The default tolerances can be changed; new default tolerances will
only be applied to masters made after the adjustment. It is up to the weld process engineer to document
the weld process and adjust tolerance limits to the proper values.
The WMS supports Halfcycle and Segment Tolerancing.
Halfcycle Tolerancing compares the data from each halfcycle in a segment to halfcycle limits
specified for that segment. All of the halfcycles in a segment are compared to the same halfcycle limits
for that segment. If you move the cursor to any halfcycle in a segment and set the halfcycle tolerance,
this sets the limits for all of the halfcycles in that segment. If you want to impose different limits on
halfcycles in the same weld, you can divide the weld up into more segments, and tolerance the
halfcycles in each segment differently.
Segment Tolerancing calculates an average value for all of the halfcycles in each segment, and then
compares that value to separate segment limits specified for that segment.
To switch between the Halfcycle Tolerancing and Segment Tolerancing screens, touch anywhere on
the graph (using touch screen) to highlight it and press the SELECT button. The display will shift
between
HALFCYCLE TOLERANCES
and
SEGMENT TOLERANCES
. To change the graph scale for these
screens, use the radio buttons to select Hcycle (for halfcycle tolerancing), or Segment (for segment
tolerancing), in the Graph Setup screen.
Note: You will not be able to use tolerancing until a master has been created and selected. Once
master tolerances have been edited, the Update button must be used in order for the weld monitor to
begin using these new tolerances.
Figure 6-41 Tolerancing Master (halfcycles)
Master ID
Select Master Button
Low/High Limit Boxes
Parameter Pickbox
Update Master Button
Segment Line
Cursor
Cursor Halfcycle Position
Cursor Halfcycle Value
Segment Line
Tolerance High Limit
Tolerance Low Limit
Tolerance Limit Mode