Fenix Imvico EPC1100, Руководство по эксплуатации

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FENIX IMVICO EPC1100 OPERATION MANUAL
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DC2+‘>’+n FIXED DIVISION SELECTED
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Decimal codes:
<18><62><n>
Hexadecimal codes:
<12><3E><n>
Function: Sets the head driving method to fixed division or dynamic division.
n = 0 : dynamic division mode
n = 1 : fixed division mode
Operation: If you print out horizontal lines or perform dense printing in two logical
blocks mode (fixed division), a very large electric current flows (approximately 6A at
Vp=5v, printed at 192 dots).
When you are using a small capacity power supply, you may get sparse printing.
Generally, when the line thermal head is operating, the line is divided into several
blocks which are activated one after another successively.
For the line thermal head of the LTPH245 printer mechanism, the line is divided into 6
blocks called physical blocks, 64 dots each. A strobe signal is allocated into each
physical block to activate it. To drive the head, physical blocks are activated in
groups. The group of physical blocks is called a logical block.
For the EPC1100, either dynamic division or fixed division can be selected as the
method of division for logical blocks. This selection is made through a command.
•
DYNAMIC DIVISION
EPC1100 counts the number of dots activated in each physical block and groups the
physical blocks into logical blocks to print a single dot line so that the number does
not exceed 64 dots. The EPC1100 determines logical blocks each time it prints a
single dot line. In dynamic division, in order to avoid unclear printing, at the first step
of the motor the thermal head is driven and at the second step the paper is fed.
Also, since the order of the printing blocks and printing speed is changed in each dot
line according to the contents of the print data, printing quality may be lower than in
fixed division. If printing quality is regarded as important, printing in fixed division is
recommended.
Number of logical blocks
Maximum number
of activated dots Motor
step
1 2 3 4 5 6
First
Step 64 dots
64 dots
64 dots
64 dots
64 dots
64 dots
Dynamic
Division
Mode
Second
Step Paper
feed
Shaded area = Activated dots
Fig. 5.4-Head logical blocks for dynamic division.