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EPOCH 4PLUS
STEP 2: INTERMEDIATE ECHOES
The second advanced algorithm training step allows the user to customize the acceptable
height of potential intermediate echoes. In this step, two horizontal lines appear on the
screen, both beginning around 6%-7% FSH.
Figure 67 Intermediate Echo Detection Level
• Red Line: Default acceptance height of intermediate echoes
• Purple Line: Customizable acceptance height of intermediate echoes
Note: When first activated, both lines begin at the same level, and the red line may
not be visible. Adjust the height of the customizable purple line to reveal
both lines.
To adjust the height of the customizable, purple line, use the UP and DOWN slewing/
arrow keys to move the line to the desired screen height. The default, red line of
acceptance height is predefined in the Spotweld Assistant algorithm and is not adjustable.
Adjusting the height of acceptance for intermediate echoes is especially helpful in the
situation where the transducer diameter is slightly larger than the weld nugget size. In this
case, some intermediate echoes will be present but are a result of mismatched transducer
diameters and not an undersized weld condition.
Once the desired adjustment is made (if any), press [ENTER] to continue.
STEP 3: ECHO SPACING
The third advanced algorithm training step allows the user to define the minimum
acceptable echo spacing for potentially thin nuggets. In this step, two horizontal lines
appear under the A-Scan display, each with vertical line indications representing echo
placement.
• Green Line: Represents echo spacing of stored GOOD weld condition
• Purple Line: Represents minimum acceptable echo spacing
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