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APPENDIX D—AUTO CUTTER
Introduction
The Auto Cutter option is for cutting the sample during either Method A or Method A/B tests.
The cutter is engaged at the end of each, defined cut time within the test. For example, if a
Method A test is defined to have 3 sample cuts, at 60 second intervals, then the auto cutter will
cut the extrudate at the end of each 60 second interval. Also, the auto cutter will cut the
extrudate at the end of the defined Melt Time, before the test sample time is to begin.
The Auto Cutter option is triggered from the LMI main PCB via an 8 pin connection to the PCB.
The Auto Cutter option cuts in a single, 360 degree rotation and drops the cut sample down
below the barrel in the work surface above and to the rear of the display. The cutting action is
accomplished by using a thin, flexible blade against the rigid, bottom die holding plate. The
cutting blade is rotated via a stepper motor. Homing and Positioning are controlled within the
motor’s own, on-board electronics and a position sensor tied to the motor control.
The Auto Cutter comes with a clear, safety door. This door must be closed for the Auto Cutter to
cycle. The door may be opened during a test to remove cut sample(s) and then closed to allow
the cutter to continue to operate during a test. For example, if 60 second sample cut intervals
are being used for a test, the operator may open the safety door, remove the sample, and then
close the safety door in the 60 second interval between tests without affecting the Auto Cutter
operation during a test.
At anytime during a test, the sample extrudate can be cut by the operator by simply pressing the
cut button.
P/N: M0726(3)
| Rev: 012020 | ECO: 51182
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