Summa D120 - Changing the Drag Knife Offset; Correct Knife Offset Pattern

SummaCut cutter User’s Manual
Basic Operation 2-5
2.2.3
Changing the drag knife offset
A very important parameter for a drag knife is the offset. The offset is the distance
between the knife centre and the knife tip.
NOTE: The knife offset should be set each time the knife is changed and
should be checked if the knife shows signs of wear.
NOTE: A typical knife offset for Summa knives is between 0.41 and 0.45 for
standard knives, between 0.9 and 0.97 for sandblast knives and between
0.49 and 0.52 for the 60 degrees knife.
NOTE: Sandblast knives should be used when the material, that needs to be
cut, is thicker than 0.25 mm.
Changing knife offset:
1.
Power on the cutter, load the media and mount the tool (see section 1).
2.
Press .
‘’Knife pressure’ will appear on the LCD.
3.
Use or to scroll through the menu until ‘knife offset’ is reached, press .
The current offset will appear on the LCD.
4.
Press or to change the knife offset.
The value will change
1. Press to perform the internal knife offset test.
2. Press to confirm the chosen knife offset.
3. Press to leave the offset unchanged.
When the knife offset is set correctly, the test pattern looks like this:
FIG 2-2
2-2 CORRECT KNIFE OFFSET PATTERN
When the knife offset is too low, the test pattern looks like this:
When the knife offset is too high, the test pattern looks like this: