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(11) | EP 0 419 812 A3 |
| (12) | EUROPEAN PATENT APPLICATION |
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| (54) | Multiple ink zero calibration for printing presses |
| (57) A method of providing a software zero state for a plurality of ink adjusting modules
in a printing press. Each of the ink adjusting modules are provided for adjusting
an associated plunger assembly for dispensing ink to an ink rail in the printing press,
each ink adjusting module having an ink control lever which contacts the plunger assembly
to change the ink volume being pumped by the associated plunger assembly to the ink
rail, having a mechanical stop for the ink control lever and having an adjustable
ink control rod contacting the ink control lever. The method has the steps of: placing
the printing press in a manual mode; positioning the ink control lever of each ink
adjustment module at the associated mechanical stop; operating a bidirectional motor
in each ink adjustment module to move the ink control lever to a position corresponding
to a desired black printing via the ink module control rod which is connected to the
motor and which contacts the control lever; and measuring the position of the motor
with a potentiometer; storing the position of each motor, from a position value output
by the associated potentiometer, in a memory thereby providing the software zeros
for the printing press. |