Wincor Nixdorf TH210, Руководство программиста

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TH210 Programmer’s Guide
36
Moves the print starting position the specified number of dots either right (up to the right margin)
or left (up to the left margin) of the current position. The print starting position is reset to the first
column after each line.
Formulas
To move to the left:
Determine the value of
n by multiplying the number of columns to move left of the current
position by 10 (standard) or 8 (compressed) pitch. The example shows how to set the relative
position two columns in standard pitch (10 dots per column) to the left of the current position.
2 x 10 = 20 dots (two columns to be moved left of the current position) 65,536–20 = 65516
65,516/256 = 255, remainder of 236
n1 = 236, n2 = 255
To move to the right:
Determine the value of
n by multiplying the number of columns to move right of the current
position by 10 (standard) or 8 (compressed) pitch. The example shows how to set the relative
position two columns in standard pitch (10 dots per column) to the right of the current position.
2 x 10 = 20 dots (two columns to be moved left of the current position) 20/256 = 0, remainder of
20
n1 = 20, n 2 = 0
Related information
If the set horizontal and vertical minimum motion units command (1D 50) is used to change the
horizontal and vertical minimum motion unit, the parameters of this command (set relative print
position) will be interpreted accordingly. In page mode, upper left or lower right uses the horizontal
motion unit, and upper right or lower left uses the vertical motion unit.
For more information, see the description of the set horizontal and vertical minimum motion units
command (1D 50) in this document.
If underline is set, spaces skipped by this command are not underlined.
Compatibility information (TH210 receipt vs. A793 receipt)
There is a difference in the normal behavior of this command in A793 emulation mode as
compared to the original A793. The difference exists when the command is used to move to the
left. The A793 processes the whole print string prior to putting it in the buffer for the printhead.
This method of processing allows the A793 to back up in the print string and replaces characters
and their associated attributes when a “Set relative print position” command instructs the printer
to move the print position to the left.
In order to improve the speed of printing, the TH210 moves the data into a buffer for the
printhead when it receives it. When the “Set relative print position” command contains a move to
the left, this causes the new data to overstrike the previous data. This behavior can be used to an
application’s advantage to provide the ability to create compound characters on the receipt
station.
This command also functions differently in the A793 emulation when used in graphics:
n x 2 = Number of dots to be moved from the beginning of the line when this command is followed
by a graphic command.