03-21-2018, 03:04 AM
(This post was last modified: 03-21-2018, 03:05 AM by KnifeGrinders.)
(02-23-2018, 11:32 PM)SHARPCO Wrote: Sometimes, the fulcrum causes the knife edge to fall out of level. Is it OK to measure like this?
SHARPCO, we put the following leaflet in the PT50 sold to customers (the #3 answers your question) - this is just a brief summary of what we read in EOU manuals.
PT50 Factors Affecting Accuracy
Test media slack - falsely increases the score.
Blade is not centred against the test line gap - variance starts if the blade is off the gap centre by more than 1.5 mm. Correct by repositioning the Fulcrum.
Edge not vertical - variance starts if the blade is slanted by more than 5 degrees off the vertical plane.
Knife edge does not cross the test line at 90 degrees (right angle), i.e. Test Fixture is not squarely aligned with the Fulcrum.
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