Seam Test
| The internal seam tests are made using the seam scope
projector. A seam scope projector is a specially designed microscope. It enlarges the
cross section of a cut double seam and projects this image down onto a screen. Two
calipers attached to a scale lie on the projection screen and can be moved to take the
various measurements. The first measurements are taken from the cut seam section to the
left of the side seam. |
| Procedure: Step 1- Insert the seam section into the notch in the clamp and then securely tighten the with the screw. Some adjustments should be made when inserting the seam section to assure it is completely in focus through the view port. Oil will often be deposited on the seam during cutting which will blur the projected image of the cross section. The oil is easily removed by rubbing the cross section with an eraser. |
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Step 2- Take measurements by sliding the two calipers
located on the projection screen. The scale is marked at the 0.001" scale. Adjust the
calipers to measure the body hook, overlap, cover hook, and width. |
| Step 3- Repeat the above steps, taking the exact same measurements, on the second seam section. |  |
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