Epson C107001 - LQ 570+ B/W Dot-matrix Printer Dimensions

EPSON AMeRIc& INC.
EPSON
Product Support Bulletin
Subject:
Understanding and Using ESCP/2 Commands and Syntax
Date: 12/4/91
Page(s): 1 of 14
PSB No: P-0082
Originator: JW
This bulletin provides detailed explainations and illustrations for some of the more
commonly used printer commands used in ESC/P2 Listed below are the
commands discussed in this bulletin.
Command Command Name
PSB Page
ESC X m n1 n2 Select Pitch and Point Size 2
ESC ( C m1 m2 n1 n1 Set Page Length in Defined Units
5
ESC(v m1 m2 n1 n2 Set Relative Vertical Position
6
ESC(V m1 m2 n1 n2
Set Absolute Vertical Position
8
ESCtn
Select Character Table
9
ESC ( t n1 n2 d1 d2 d3
Assign Character Table
10
ESC( A nln2d,.
. .&
Print Data as Characters
14

PSB No: P-0082
Page: 2 of 14
ESC X m n1 n2
(Select Pitch and Point Size)
C X m n1 a is the command for selecting pitch and point size where m, nl and
n2 are variables. The vadable W is used to select the pitch, which is the character
spa&g. The variable W” selects the point size and the variable “n2”, at this time,
will always be 0 (zero). The variables In” and 91’ ate explained below.
Thevaluesusedfor’m’ateO,l,18,21,24,30,36,4248,60,and72 tf’o”is
usedasthevaluefor”m”,therewillbenochangeinpit~. lf”lVsusedasthe
value far W, the character pitch will be proportional spacing. To determine the
character pit& for all other values of %I”, divide 360 by “m”.
For example, if rn=W
then 360 divided by 60 equals 6 and the character pitch is 6 characters per inch. If
m=30, the character pitch is 12 characters per inch.
FortheRomanandSansSerifforrts,thevaiueausedfor’nimare0,16,20,TI,24,
28,3238,40,42,44,48,5238,8Oand84. ForaUotbrfonts,Utevaluesusedfor
“nlmare0,21,and42 l’heactualpaintsbthatwillprintisnl didedby2 For
example, if nl=20, the point size is 10. tf nl=48, the point size is 24.
NOTE:
When selectina a Doirft size laraer than 24 (the value for nl is treater than 4&
select twof3ortional wacina tm=ll for the character me&.
In the Basic programming language, the command would look like this.
LPRlf+lT cHR$(n);*xll;CHRS(l);CHR$(48);~~~(o);”~his is24pointproportional
spaced”
Ch6(27) is ESC, cW(l) selects proportional spacing, chr$(48) selects 24 point
character size. At this time, n2 is m zero (0).

PSB No: P-0082
Page: 3 of 14
10 INPUT “Point Siie”;A$
20 B=VAL(A$)*2
21 RESTORE 70
22FORX=l TO16
23READY
24 IF B=Y THEN GOT0 30
25NMTX
26CLS
27 PRINT A$ ” is not a valid point size choice.”
28 GOT0 10
30 C=VAL(A$)
40 LPRM CHR$(27);“X”;CHR$(l);CHR$(B);CHR$(O);”n‘lese are “;A$;” point
characters”
50 LPRtNT CHR$(27);“(V”;CHR$(2);CHR$(O);CHR$(C);CHR$(o)
60 GOT0 10
70 DATA 0,16,20,21,24,28,32,36,40,4~44,48,52,56,60,64
Line 10 - allows you to specify the point size desired.
Line 20 -
computes the value for “nl” in the ESC X command.
tine 21 - check to ensure that a valid point size was input
tf the point size is
valid, the program jumps to line 30.
tf the point size is not valid, the
program prints a message on the screen and starts over again.
Line 30 - computes the value for “nl ” for advancing paper using the ESC ( v
command.
Line 40 -
sends the “Set Pitch and Point Size” command to the printer. (Note: The
pitch is set for proportional spacing for ail point sizes to ensure proper
character spacing regardless of the point size.)
Line 50 -
sends the “Set Relative Vertical Position” command to the printer. This
command advances the paper in preparation for printing the next line.
Line60- causes the program to start again at the beginning.
NOTE: To hatt the program, hold down the “CM key and press the “c” key.

PSB No: P-0082
Page: 4 of 14
These are 8 point characters
These are 10 point characters
These are 10.5 point characters
These are 12 point characters
These are 14 point characters
These are 16 point characters
These are 18 point characters
These
are 20 point characters
These are 21 point characters
These are 22 point characters
These are 24 point characters
These are 26 point characters
These are 28 point characters
These are 30 point characters
These are 32 point characters

PSB No: P-0082
Page: 5 of 14
ESC ( C m1 m2 n1 n2 (Set Page Length in Defined Units
II
ESC ( C ml m2 nl n2 is the command for setting the page length in units where ml,
m2, nl and n2 are variables. The “uniV’ is usually l/380 of an inch unless defined
othenwise by the “ESC ( l.Y command. Currently, the values for ml and m2 MUST be
ml =2 and m2=0.
To determine the values for n1 and n2 perform the following steps.
1. Determine the desired page length in inches.
2 Multiply the page length by 380.
3.
Divide the result by 256 using long division.
4. The remainder in the quotient from step 3 is the value for n1.
5.
The whole number in the quotient from step 3 is the value for n2.
EXAMPLE
1. The page length is 8.5 inches.
2 8.5 x 380 = 3060
3. 3080 divided by 258 = 11 with
a remainder of 244.
4. nl=244
5. n2=11
In the Basic programming language, the command would look like this.
This command, as listed in the line above, will set the page length to 8.5 inches.
NOTE: The current line becomes the top of form. This command cancels any
previously set top and bottom margin settings. If you wish to set the top and bottom
margins via software command, the commands must be issued AFTER the “Set Page
Length in Defined Units” command. The proper page length setting can be confirmed
by issuing a “Form Feed” command, chr$(l2), or by pressing the “FF button on the
control panel while the printer is “Cff Line”.

PSB No: P-0082
Page: 6 of 14
1
ESC ( v m1 m2 n1 n2 (Set Relative Verticai~~~
ESC l v ml m2 nl a is the command for advancing the print position verticaiiy in
unitswhereml,m2nl andn2arevariables. The5nCisusually1/36Oofaninch
unless defined otherwise by the “ESC ( U command. Currently, the values for ml
and IT@ MUST be ml =2 and m2=0.
To determine the values for nl and n2 perform the following steps.
1. Determine the desired vertical motion dii in inches.
2 Multiply the distance by 360.
3.
Divide the result by 256 using long division.
4.
The remainder in the quotient from step 3 is the value for n1.
5.
The whole number in the quotient from step 3 is the value for n2
EXAMPLE
1. The desired distance is 1 inch.
2 1x360=360
3. 36Odiidedby256=1witharemainderofl04.
4. nl=lO4
5. n2=1
In the Basic programming language, the command would look like thii.
Thiscommand,aslistedintheiineabove,willfeedthepaperuplinchfromthe
ament line. The current print column (horizontal position) IS NOT changed.
‘Reverse” paper feed less than l/2 inch can be performed with this command. To
accompliih Wvers# paper feeding requires the following steps.
1.
Determine the desired vertical motion dice in inches.
2
Multiply the distance by 360.
3. Divide the result by 256 using long division.
4.
Subtract the remainder in the quotient computed in step 3 from 256.
5.
The result from step 4 is the value for n1.
6. Thevaluefofn2willahnfaysbe255.

PSB No: P-0082
Page: 7 of 14
EXAMPLE
1.
The desired distance is l/4 inch.
2. 1/4x 360 = 90
3. 90 divided by 256
= 0 with a
remainder of 90.
4.
2%90=166
5. n1=166
6. n2=255
In the Basic programming language, the command would look like this.
LPRlNT CHR$(27);“(v”;CHR$(2);CHR$(O);CHR$(166);CHR$(255)
This command, as listed in the line above, will feed the reverse feed the paper 1/4 inch
from the current line. The current print column (horizontal position) IS NOT changed.

PSB No: P-0082
Page: 8 of 14
C f V m1 m2 n1 a is the command for changing the print position vertically (with
respect to the Top of Form position) in units where ml, m2, nl and n2 are variables.
TheZlnit”isuswllyl/~afaninchunlessdefinedatherwisebythe”ESC(U
command.
Currently, the values for ml and m2 MUST be ml =2 ‘and m2=0.
To determine the values for nl and n2 perform the following steps.
1. Determine the desired vertical dice from the Top of Form in inches.
2 Muttiplythe dice by380.
~
3. Divide the resutt by 258 using long division.
4.
The remainder in the quotient from step 3 is the value for nl.
5. The whole number in the quotient from step 3 is the value for n2
EXAMPLE
1.
The desired dice from the Top of Form is 1 inch.
2 1x380=380
3. 36Odiidedby258==
1 witharemainderof104.
4. nl=lO4
5. n2=1
In the Basic programming language, the command would look like this.
Thiscommand,as~~~brthelineabwg.willpositionthepaperl inchfromthe
current Top of Form setting. For example, if the Top of Form setting is the top edge
of the paper, the paper will be positioned so that the printer is ready to print 1 inch
down from the top edge of the paper.

PSB No: P-0082
Page: 9 of 14
ESC t n is the command for selecting a character table to be used for printing where
n is a variable. The following table lists the values for n and the character table
associated with the value.
II
n
I
Table
II
II
3I PC437 (US)
II
Table 1
NOTE: 1. Character tables other than those listed above can be assigned by using
the ESC ( t command (Assign Character Table).
2 The value used for n can be either the ASCII value OR the ASCII character
(i.e. chr$(l) or “1”).
In the Basic programming language, the command would look like this.
Lf’RlNT CHR$(n);Y:CHR$(O);
CHR$(27) is ESC and CHR$(O) selects table 4% (italic).

PSB No: P-0082
Page: 10 of 14
ESC ( t nl n2 dl .d2 d3 (Assign Character Tabie)
ESC f t nl n7 dl d2 d3 is the command for assigning character tables where n1, n2,
dl,d2,andd3arevariables. CurrenUy,variabknl,n2andd3MlJSTbenl=3,
n2=0, and d3=0. Variable dl is a number corresponding to one of the four tables
selectable with the ESC t n command. This is the table that will be replaced. Valid
valuesford areO,1,2,and3(seeTabtel below). Variabled2isanurnbar
corresponding to a registered table.
lhii is the table that will replace the table
indicated by Variable d1. Valid Values for d2 are 0, 1,3,7,8, and 9 (see Table 2
MOW).
1 dl t SeIectabIeTabIe #
I
0
-1
Italic
1
Table 1
IO Iwic
I 3 IPC95O(Intemationa0 I
II 9 I I
Table2
After using the ESC ( t command, the ESC t n command MUST be sent to select the
table before printing from the new table.
For example, the command ESC ( t 3 0 1 3
0 is sent (assign Registered Table 3 (PC950) to Selectable Table 1 (PC437). In order
to print the Q character (ASCII 245), the command ESC t 1 must be sent. In the Basic
programming language, the sequence would be as follows:
t.PRtNT CHR$(27);“CT);CHR$(3);CHR$(O);CHR$(l);CHR$(3);CHR$(O);
LPRINT CHR$(27);7’;CHR$(l);
LPRINT CHR$(245)
Some ESC/P2 documentation may illustrate as many as 22 different Registered
Tables. The Registered Tables are a part of the character set, therefore, they are
contained in the Character Generator ROM. The CG ROM differs based upon the
destination country. For thii reason, only the above Registered Tables are available
on LQ-570, LQ-1070, LQ-870 and LQ-1170 printers sold for the U.S. market. Foreign
Character Generator ROMs ARE NOT available in the United States. The following