SOFTWARE MANUAL C32
9 PRINT POWER MANAGEMENT IN ECO PRINT MODE
C ontrol print current Module 18: Print, Parameters: 18,7 and 18,8
In ECO mode parameters preset how much peak current the printer can accept. Accordingly the printer adjusts its print
speed dynamically. Peak power and dynamics are adjustable. The current peaks during printing can be adjusted by
command. The maximum value results from the maximum number of simultaneously energized dots. The limited =
minimum value results from the simultaneous energization of at least 8 pixels. This means if many pixels are energized
sequentially in a horizontal line, the printing speed reduces severely. A high power voltage Vp also results in high pixel
currents. This is because the current limitation is realized through a limitation of the number of simultaneously energized
pixels and not through a current measurement. The command adjusts the maximum allowable peak current indirectly
through the number of pixels, the known dot resistance and the maximum possible power supply voltage. The maximum
number of dots to be printed is controlled so that the predetermined peak current is not exceeded. This allows the power
consumption of the printer to adapt to the possible current output of a higher ranking electrical system. In addition, a
further parameter influences the pressure dynamics and thus the print quality.
Parameter 18,8 / adjust printer current in ECO print mode
The current peaks are determined during the printing by the number of simultaneously energized dots.
Parameter 18,8
multiplied by 8, specifies how many dots per process may be activated simultaneously. The value range from 1- 255
permits the simultaneous activations of a minimum of 8 to a maximum of 2040 dots. See Hardware Manual. A high
number of dots increases the print speed but also the print peak current.
Once the number of black pixels to be printed in a line segment reaches a certain value, the next print line is filled with 0
and then the line is activated. In the next cycle , the already printed pixels are filled with 0 and then other pixels (maximum
n) will be activated etc.
The maximum current I depends on the power supply V
p
and dot resistance R
dot
:
I = (V
p
x number of pixels / R
dot
) + I
Vcc
+ I
motor
for example:
V
p
= 5V , R
dot
= 123 Ohm, I
motor
= 0.5A , I
Vcc
= 0
with n = 8 (i.e. 64 Pixel) => I
peak
= 5 x 64 /123 +0.5 = 3.1A
Parameter 18,7 / adjust print dynamics (virtual segment size)
Minimum is 1, maximum is the printing width in mm, e.g. 80 for GPT 4633. This parameter determines the p rint speed
dynamics: High dynamics means the printer prints each line as fast as permitted by the maximum specified current.
Therefore a blank line is printed faster than a full line. With suppressed dynamics each line is printed as if it were
completely black. Constant motor rotation = good print quality . The parameter sets how many bytes are printed
simultaneously (the same when they contain only 0, i.e. no dots will be printed). When selecting „1“ the printer as a
principle splits the line in 8 pixel wide segments ,
i.e. segments to be activated. When m includes all bytes being arranged
in one line (if 8 pixels/mm, then the total effective print width in mm), the printing line can be activated in a single
operation.
GeBE Elektronik und
phone
+49.89.894141-0
GeBE-document-no. SoMAN-C32-E-V2.2-0793
Feinwerktechnik GmbH
fax
+49.89.894141-33
date
July 7, 2020
Beethovenstraße 15
page 80 | 166
82110 Germering
Our general terms of business are to be applied.
Germany
Internet
www.gebe.net
Errors and changes reserved.
