The function of the front gauge of the positioning

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The function of the front gauge of the positioning device of the sheet fed offset press (II)

the height of the positioning plate can be adjusted appropriately according to the thickness of the paper. Generally, when the front gauge is in the positioning position, the gap between the bottom surface of the curved part of the positioning plate and the plane of the paper feeding iron table should be three times the thickness of the printed paper. For individual adjustment, loosen the screw 16 fixing the front gauge base frame, hold the front gauge with your hand to adjust its height, and then tighten the fixing screw 16 after adjustment. For overall adjustment, loosen the lock nut 24 first, and then turn the adjusting nut 20 to change the height of the connecting rod 7, so that the front gauge shaft 13 deflects by an angle, driving the positioning plate to rise or fall. The condition of the adjusting nut 20 increasingly requires a clearance of 0.1mm between the adjusting nut 20 and the sliding sleeve 4 during the positioning of the front gauge to ensure that the eccentric pin shaft 22 is close to the rod 8. The clearance should not be too large, which will increase the positioning time

the gap between the front gauge positioning plate and the paper feeding iron table is generally still three times the thickness of the printed paper (if the paper thickness is greater than 0.3mm, the gap is the paper thickness plus 0.2mm). A contact reed (Figure) is installed at the upper gear gauge of the front gauge of the domestic offset press, which is usually called the electric tooth. It is used to detect the condition of the paper reaching the front gauge. If the paper is skewed, arrives late, and there is no paper, the reed is isolated from the power supply. At this time, the power supply is connected, and the paper feeding stops working immediately

this kind of detection device is also installed on the multi-color offset press, commonly known as the electric eye, such as the front gauge electric eye of the CD102 machine. When detecting the paper, place the paper at the front gauge. If the position of the paper contacting the front gauge is correct, two control messages (two black blocks) will appear on the display screen (Figure 4 - it will be replaced in a few years). On the contrary, if there is only one or no control information at all, it is necessary to adjust the paper alignment electric eye

(Figure) detection of front (side) gauge eye

Adjustment of front gauge electric eye:

A if the display has no control signal (Black Square)

b. slowly turn the knob clockwise (Fig./①) until 9 Curve selection: stress-strain, force displacement, force time, displacement time and other curves can be selected for display and printing; Now the first control signal

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