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Printek Emulation

Black Mark Sensing

The PTX Print Series printers can print on preprinted forms on roll media by using a “black mark” to sense the

beginning of each form. The black mark is located on the form in a position where the printer’s paper out

sensor can be used to detect its presence. Additionally, the MLP “LP” models are capable of sensing a black

mark on the back side of the form and for sensing the gap between labels. The recommended position for the

black mark is described below.

Black Mark Requirements

For automatic label and ticket printing, the black mark should be positioned as shown in the illustration below.

When using Mark Sensing mode, the MLP and PrintAbout printers will automatically position the label for

tear-off and printing following a Form Feed command or by pressing the Paper Feed button. Please refer to

your printer’s Operator’s Manual for information on selecting this operation mode.

0.15”

Black Mark should span width

of paper for best results.

Perforation or tear position

Optimum Black Mark Position

Black Mark Sensing Commands

For non-automatic paper positioning, the following commands may be used to cause the paper motion to stop

when the black mark is sensed.

Set Paper Out Sensitivity ESC Q Q n

This command sets the number of 0.125mm dot rows of paper motion that can occur after the paper out sensor

detects the lack of paper before a paper out condition is displayed and the printer stops printing. Using this

command to set a number of dot rows larger than the vertical size of the black mark, which looks like a lack of

paper, allows the printer to continue operating in the area of the black mark. 0 ≤ n ≤ 255, the default value is

40.

Example: The following escape sequence will set the paper out sensitivity to 50 dot rows.

Escape Sequence ESC Q Q 50

Hexadecimal 1B 51 51 32

1 2 ... 23 24 25 26 27 28 29 30 31 32 33 ... 60 61

Brak uwag

Psion Teklogix PrintAbout MP2000 Dokumentacja Strona 28