Intermec PX4i Intermec Direct Protocol 8.60 Programmer's Reference Manual - Page 54

Media Feed - printing blank labels

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Chapter 4-Feeding & Printing Instructions 4.1 Media Feed In order to provide maximum flexibility, there are several instructions for controlling the media feed and an optional paper cutter: CLEANFEED Runs the printer's media feed mechanism in order to facilitate cleaning of the platen roller. FORMFEED | FF [] Feeds out a blank label or optionally feeds out (+) or pulls back (-) a certain amount of media without printing. TESTFEED [] Feeds out a number of blank labels, or optionally a specified amount of media, while adjusting the sensitivity of the label stop/black mark sensor and detecting the front edges of the labels. If a feed length is specified, make sure that at least one gap or mark passes the label stop/black mark sensor. CUT Makes an optional paper cutter perform a cutting cycle. The media is fed past the printhead by a rubber-coated platen roller driven by a stepper motor. The movement of the media is detected by the label stop sensor (LSS) or black mark sensor (BMS), except when various types of continuous stock are used. The printer's setup in regard of "Media Size; Length" and "Media Type" is essential for how the media feed will work. There are five different Media Type options (also see the User's Guide of the printer): • Label (w gaps) • Ticket (w mark) • Ticket (w gaps) • Fix length strip • Var length strip When a FORMFEED, TESTFEED, or PRINTFEED instruction is executed, the photoelectric label stop sensor (LSS) detects the forward edge of each new label or the forward edge of each detection gap, and the black mark sensor (BMS) detects the rear edge of each black mark, as the media is moved past the sensor. By performing a TESTFEED operation after loading a new supply of media, the firmware is able to measure the distance between, for example, the forward edges of two consecutive labels, thereby determining the label length, and can adjust the media feed accordingly. The same principle applies to tickets or tags with detection gaps, and to tickets 46 Intermec Direct Protocol v.8.60-Programmer's Reference Manual

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46
Intermec Direct Protocol v.8.60—Programmer’s Reference Manual
Chapter 4—Feeding & Printing Instructions
4.1 Media Feed
In order to provide maximum flexibility, there are several instructions for
controlling the media feed and an optional paper cutter:
CLEANFEED <feed length in dots>
Runs the printer’s media feed mechanism in order to facilitate cleaning of the platen roller.
FORMFEED | FF [<feed length in dots>]
Feeds out a blank label or optionally feeds out (+) or pulls back (-) a certain amount of media without
printing.
TESTFEED [<feed length>]
Feeds out a number of blank labels, or optionally a specified amount of media, while adjusting the
sensitivity of the label stop/black mark sensor and detecting the front edges of the labels. If a feed length
is specified, make sure that at least one gap or mark passes the label stop/black mark sensor.
CUT
Makes an optional paper cutter perform a cutting cycle.
°e media is fed past the printhead by a rubber-coated platen roller
driven by a stepper motor. °e movement of the media is detected by the
label stop sensor (LSS) or black mark sensor (BMS), except when various
types of continuous stock are used.
°e printer’s setup in regard of “Media Size; Length” and ”Media Type”
is essential for how the media feed will work. °ere are five different
Media Type options (also see the User’s Guide of the printer):
• Label (w gaps)
• Ticket (w mark)
• Ticket (w gaps)
• Fix length strip
• Var length strip
When a
FORMFEED
,
TESTFEED
, or
PRINTFEED
instruction is executed,
the photoelectric label stop sensor (LSS) detects the forward edge of each
new label or the forward edge of each detection gap, and the black mark
sensor (BMS) detects the rear edge of each black mark, as the media is
moved past the sensor.
By performing a
TESTFEED
operation after loading a new supply of
media, the firmware is able to measure the distance between, for example,
the forward edges of two consecutive labels, thereby determining the
label length, and can adjust the media feed accordingly. °e same
principle applies to tickets or tags with detection gaps, and to tickets