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><H1
CLASS="sect1"
><A
NAME="AEN1669"
>5.3. Appropriate Remote Commands</A
></H1
><P
> All of the remote commands described above are wrapped up with
the usual boilerplate. The files always start with
<TT
CLASS="literal"
>00 00 00</TT
> and the “magic”
command described above, then two <TT
CLASS="literal"
>ESC @</TT
>s to
reset the printer. The remote command sequences come next; if
they print anything that is usually followed by a
<TT
CLASS="literal"
>FF</TT
> (<TT
CLASS="literal"
>0C</TT
> hex) character to
feed the page, then the file ends with another two
<TT
CLASS="literal"
>ESC @</TT
>s to get back to the ground state.
</P
><P
> An alignment sequence goes like this:
</P
><P
></P
><OL
TYPE="1"
><LI
><P
> Host uses <TT
CLASS="literal"
>DT</TT
> to print an alignment
sheet.
</P
></LI
><LI
><P
> User eyeballs the sheet to see which is the best aligned
pattern.
</P
></LI
><LI
><P
> Host sends a <TT
CLASS="literal"
>DA</TT
> command indicating
which pattern the user chose.
</P
></LI
><LI
><P
> If the user said “realign”, meaning he isn't
done yet, go to step 1.
</P
></LI
><LI
><P
> We are done: host sends a <TT
CLASS="literal"
>SV</TT
> command
and exits.
</P
></LI
></OL
><P
> The sequence used (by the STC 3000, at least) to print from
the roll feed is (with byte count omitted):
</P
><DIV
CLASS="informalexample"
><P
></P
><A
NAME="AEN1693"
></A
><PRE
CLASS="screen"
>PM 00 00
SN 00 00 00
EX 00 00 00 00 05 01
ST 00 01
SM 00 02</PRE
><P
></P
></DIV
><P
> The sequence used by the STP 870 to print on plain paper is
</P
><DIV
CLASS="informalexample"
><P
></P
><A
NAME="AEN1696"
></A
><PRE
CLASS="screen"
>PM 00 00
IR 00 03
SN 00 00 01
SN 00 01 00
SN 00 02 01
EX 00 00 00 00 05 00
FP 00 00 00</PRE
><P
></P
></DIV
><P
> and the job finishes with
</P
><DIV
CLASS="informalexample"
><P
></P
><A
NAME="AEN1699"
></A
><PRE
CLASS="screen"
>IR 00 02
LD</PRE
><P
></P
></DIV
><P
> For different paper type settings on the STP 870, the
arguments to <TT
CLASS="literal"
>SN</TT
> vary. The arguments to the
first and third <TT
CLASS="literal"
>SN</TT
> commands are as outlined
in the description of the <TT
CLASS="literal"
>SN</TT
> command above;
the arguments to the second (“platen gap”) are
<TT
CLASS="literal"
>00 01 01</TT
> for thick papers (“matte
paper—heavyweight”, “photo paper” and
“premium glossy photo paper”) and <TT
CLASS="literal"
>00 01
00</TT
> for all others.
</P
><P
> For roll-mode printing, the STP 870's sequence changes as
follows. <TT
CLASS="literal"
>IR</TT
>'s arguments become <TT
CLASS="literal"
>00
01</TT
> in the header, and <TT
CLASS="literal"
>00 00</TT
> after
the job, and <TT
CLASS="literal"
>EX</TT
>'s last argument changes
from <CODE
CLASS="constant"
>00</CODE
> to <CODE
CLASS="constant"
>01</CODE
>.
</P
><P
> For zero-margin printing on the STP 870, the arguments to
<TT
CLASS="literal"
>FP</TT
> become <TT
CLASS="literal"
>00 0xb0 0xff</TT
>.
This moves the origin about 5.5mm to the left, to a point one
tenth of an inch to the left of the left-hand edge of the
paper, allowing printing right up to (and beyond) the edge of
the paper. Some printers (at least the STP 870) include white
absorbent pads at the left margin position and other positions
(89mm and 100mm on the STP 870) to soak up ink which misses
the edge of the paper. Printing off the edge of paper of a
width not aligned with a pad could result in making a mess of
the inside of the printer and ink getting on the reverse of
the paper.
</P
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