Method, liquid supply unit, and measurement device for a level indicator

摘要

The subject matter of the invention is a method for a printing machine with a printing device (5), in particular an inkjet printer, for applying liquid (22) onto a print material, with monitoring of the quantity of liquid in a liquid supply unit (1) by measuring the liquid level (23) with a sequential controller, wherein the measurement of the liquid level (23) is performed by a device (11), which detects the presence of liquid at the output of the printing device (5).;Another subject matter of the invention is a liquid supply unit (1) for a printing machine with a printing device (5), in particular, an inkjet printer, for applying liquid (22) on a print material, with monitoring of the quantity of liquid in a liquid supply unit (1) by measuring the liquid level (23) with a sequential controller, wherein the measurement device (11) is suitable for measuring a fill level (23) and for controlling a liquid device (3).;Furthermore, a measurement device (11), in particular, for a liquid supply unit (1), is the subject matter of the invention, in which at least one part of the measurement device (11) is made from circuit-board material.

主权项

1. A method for a printing machine with a printing device to apply liquid onto a print material, the method comprising:
supplying liquid with a liquid device via a supply opening into a lower reservoir of a housing comprising a print head, wherein the lower reservoir comprises an outlet opening that is connected with a measurement device; detecting a liquid level in an upper chamber of the measurement device with a sensor; converting the detected liquid level into a measurement signal value; comparing the measurement signal value to a threshold by evaluation electronics; and activating the liquid device when the evaluation electronics determine that the measurement signal value is below the threshold based on the comparison; wherein rises up into the chamber of the upper measurement device via the outlet opening of the reservoir when the reservoir is filled with liquid supplied by the liquid device; and wherein when the lower reservoir is completely filled, liquid from the lower reservoir rises into the upper chamber of the measurement device via the outlet opening of the lower reservoir when the lower reservoir is filled with liquid supplied by the liquid device; and wherein, when the liquid level in the upper chamber drops below a minimum fill level, the liquid device is turned on until a maximum fill level in the chamber is equaled or exceeded so that the lower reservoir is always completely filled with liquid.