Paper thickness detection circuit

The thickness detection device controls the number of signatures or the number of signatures . It is pressed by the eccentric wheel on the signatures. If the signatures are more or less, Different thicknesses of books
lead to changes in the up and down swing amplitude, thereby driving the contacts to control the stapler head and the bad book output mechanism. The picture
shows the schematic diagram of the paper thickness detection electrical appliance . Its circuit and working conditions are similar to the
photoelectric detection circuit of the page binding machine .
    When the detection time switch S2 (instantaneously closed
) operates, if the thickness detection switch SI is closed
, -6V will be added to the base of VTZ through sl
, causing the flip-flop to flip, and the neon lamp EL will light up at this time
. If the detection switch S2 is not turned on when the time switch S2 is detected
, 6V cannot reach
the base of VT2.
    When a book with an accurate number of pages runs through the thickness detection
device, the detection switch Sl should be turned off. If
a book with an incorrect number of pages (missing pages or multiple pages) passes through the device
, the detection switch Sl is closed. In actual
use, the user is asked
to adjust the position of the book measuring rod and switch contact according to the thickness of normal books
.