Programming instructions

121
Intermec Fingerprint 6.13 – Programmer's Guide
11. PRINTING CONTROL
1. Paper Feed
Continued!
In order to provide maximum flexibility, there are a number of
instructions for controlling the paper feed without actually printing
any labels:
CLEANFEED Runs the printer's paper feed mechanism in
order to facilitate cleaning of the print roller.
FORMFEED Feeds out a blank label or optionally feeds
out or pulls back a certain amount of paper
without printing.
TESTFEED Feeds out a blank label while adjusting the
label stop sensor or black mark sensor.
LBLCOND Overrides the paper feed setup.
The paper is feed past the printhead by a rubber-coated roller driven
by a stepper motor controlled by the firmware. The movement of
the paper is detected by the label stop sensor (LSS) or black mark
sensor (BMS), except when various types of paper strip are used.
The printer's setup in regard of Service; Media Size; Length and
Service; Media Type is essential for how the paper feed will work.
There are four or five different types of Media Type options (also
see Technical Manual):
• Label (w gaps)
• Ticket (w mark) (some printer models only)
• Ticket (w gaps)
• Fix length strip
• Var length strip
When a FORMFEED, TESTFEED or PRINTFEED statement is
executed, the photoelectrical label stop sensor detects the front edge
of each new label or the front edge of each detection gap (or the
alternative black mark sensor detects the front edge of each black
mark), as the paper is moved past the sensor in question.
By performing a couple of FORMFEED or TESTFEED operations
after loading a new supply of paper, the firmware is able to measure
the distance between the front edges of two consecutive labels,
thereby determining the label length, and can adjust the paper feed
accordingly. The same principle applies to tickets or tags with
detection gaps and tickets with black marks.
In case of paper strip, the LSS will only detect possible out-of-paper
conditions, and the amount of paper feed is decided in two different
ways:
• Fixed length strip
The amount of paper feed for each FORMFEED, TESTFEED
and PRINTFEED operation is decided by the Service; Media
Size; Length setup.