Hengstler C-56, Руководство оператора

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Thermal Printer C-56
Part No. 2 684 019 Rev. No. 4310715 eli page
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3.2 Functions of the Printer
The printhead of the C-56 printer mechanism has a horizontal resolution of 203 dpi (dots per inch). Thus, the 448
dots allow printing of lines with a maximum width of 56 mm. The stepper motor affects the paper feed by means
of a platen that is rotated via gearing. The transmission ratio of this gearing has been selected in such a way that
the vertical dot resolution is also 203 dpi; this corresponds to a paper movement of 0.125 mm. All functions of the
printer mechanism are controlled by the integrated Controller.
Fig. 2 Diagram of paper transport
The paper is inserted into the printer through the upper and lower paper guides and led over the platen. As soon
as the reflective LED sensor L1a in the upper guide detects the front paper edge, 'automatic paper insertion' will
start and the paper is transported until its front edge can be seized in the eject chute. The LED L2 signals that
the printer is ready by flashing slowly.
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In the event the paper edge is not detected within approximately 5 seconds, the printer will
assume a malfunction and LED L2 (on the component side of the controller board) will flash
rapidly, indicating 'No paper/paper end'. The paper loading process is then aborted and must be
repeated.
As an alternative, the reflective LED sensor L1b may be installed instead of the sensor L1a. It will detect the
paper edges and recognize position identification marks (Black Marks) on the back side of the paper. The
ejected paper is cut when the user pulls it from the printer, thereby tearing it straight over the cutter. The shape of
the triangle cutter knife provides for a clean cut. The further paper transport will be carried out by program
control.
Optional reflective LED sensor L3 detects the presence of paper in the eject chute. The status of L3 can
determined via the Query command and is reported as part of the C-56 status bytes. See the C-56 Emulation
Manual D 684 017 for details on querying this sensor and the format of the response.