Zebra Technologies P640i 사용자 설명서
980541-001 Rev. A
P640i Card Printer User Guide
49
Color Calibration
Start
> Printers (or Printers and Faxes) > Right click
Zebra P640i > Properties > Device Settings > Color
Calibration
Calibration
Color rendering in the P640i can be described in terms
of a curve, which determines how much power is put
into the printhead for a given shade. The Y, M and C
“color curves” can be separately modified by the Gain
and Offset parameters shown here.
of a curve, which determines how much power is put
into the printhead for a given shade. The Y, M and C
“color curves” can be separately modified by the Gain
and Offset parameters shown here.
Note:
Typically,
the set of values should be the same for each color.
Click Restore Defaults if you are not satisfied with
adjustments made.
Click Restore Defaults if you are not satisfied with
adjustments made.
Offset: Shifts the color curve up (darker) and down
(lighter).
(lighter).
Gain: Adjusts steepness of the curve. Lighter shades
will remain unchanged, but darker shades will get
darker or lighter as the number is increased or
decreased.
will remain unchanged, but darker shades will get
darker or lighter as the number is increased or
decreased.
Prehea : Adjusts how much the head is preheated
before each print line (every three hundredths of an
inch). A larger value darkens (sharpens) the leading
edges of colored areas. A lower value may result in
“feathering” - starting light, then darkening over the
following few pixels as the head heats up.
before each print line (every three hundredths of an
inch). A larger value darkens (sharpens) the leading
edges of colored areas. A lower value may result in
“feathering” - starting light, then darkening over the
following few pixels as the head heats up.
Black Panel Density, Black Panel Preheat: See
K (Black) Panel Printing, above.
K (Black) Panel Printing, above.
Contrast Adjust: A subtle color printing control,
allows the user to shape the printer’s “lightness curve”
(roughly speaking the “
allows the user to shape the printer’s “lightness curve”
(roughly speaking the “
L
” in the color space called
L*a*b*
). In practical terms this means the ability to
control how the P640i resolves, or differentiates, the
lighter and darker shades. Between contrast settings of
0 and 100, the lightness curve transitions from linear
to sinusoidal. Linear (0%) tends to result in a low
contrast, muddy looking image. Sinusoidal (100%)
gives mostly good results, but tends to sacrifice the
lightest and darkest shades. For most purposes, select
50% and leave it there.
lighter and darker shades. Between contrast settings of
0 and 100, the lightness curve transitions from linear
to sinusoidal. Linear (0%) tends to result in a low
contrast, muddy looking image. Sinusoidal (100%)
gives mostly good results, but tends to sacrifice the
lightest and darkest shades. For most purposes, select
50% and leave it there.
Head lowered
: Print head bracket activates
sensor. Motor continues to drive a few
more steps (see Printhead Position
Adjust), compressing the spring to deliver
more steps (see Printhead Position
Adjust), compressing the spring to deliver
Motor
shaft
Print-
head
Quadrant
Printhead spring
Head raised :
Print head bracket clear of
sensor, arrowed. The quadrant is driven by
a pinion on the print head stepper motor
shaft.
a pinion on the print head stepper motor
shaft.