40
UBI EasyCoder 301 Direct Protocol – Programmer's Guide Ed. 1
Chapter 5 Feeding and Printing Commands
1. Paper Feed,
cont'd.
By performing a
TESTFEED
operation after loading a new supply
of paper, the software is able to measure the distance between, for
example, the forward edges of two consecutive labels, thereby de-
termining the label length, so that it can adjust the paper feed ac-
cordingly. The same principle applies to tickets or tags with detec-
tion gaps and to tickets with black marks.
In the case of paper strip, the LSS will only detect an out-of-paper
condition; the amount of paper feed is decided in two different ways:
• Fixed length strip
The amount of paper fed for each
FORMFEED
,
TESTFEED
and
PRINTFEED
operation is decided by the Media Size: Length
setup.
• Variable length strip
After executing a
PRINTFEED
, the printer will stop feeding as
soon as printing stops. Note that a blank space character or
“white” part of an image is also regarded as a printable object. The
amount of paper fed by
FORMFEED
is decided by the Media Size:
Length setup.
The Detection setup allows you to perform two global adjustments
to the paper feed described above:
• Start Adjust
• Stop Adjust
By default, both these parameters are set to 0, which allows for
proper tear-off operation when there is no requirement of printing
immediately at the forward edge of the label (equivalent).
• Start Adjust decides how much paper will be fed out or pulled
back before the
FORMFEED
,
TESTFEED
or
PRINTFEED
is
executed. There is a small distance between the dispenser shaft or
tear off edge and the printhead. Thus, if you want to start printing
directly at the forward edge of the label, you must pull back the
paper before printing by means of a negative start adjust value.
• Stop Adjust decides how much more or less paper will be fed out
after the
FORMFEED
,
TESTFEED
or
PRINTFEED
is executed.
Recommended Adjustments:
Dispensing:
Start Adjust :
-88
Stop Adjust:
-48
Tear Off:
Start Adjust:
-136
Stop Adjust:
0
Strip:
Start Adjust:
-136
Stop Adjust:
-60