User's Guide
Solving Problems 6-31
Fine-Adjusting the
Carriage Home Position
HOME lets you fine-adjust the carriage home position, which determines
the location of the leftmost print position on a page. This parameter en-
sures that the leftmost print position aligns exactly with the "0" mark on
the paper scale. The fine-adjustment is expressed in 1/120-inch incre-
ments. HOME parameter settings can range from
-6
to
24
. Negative
settings move the carriage home position farther left and positive settings
move it farther right.
Fine-Adjusting the Paper Sensor
PTHRESH lets you fine-adjust the amount of reflectivity that the paper
sensor must sense before printer logic recognizes that paper is loaded in
the printer. This parameter ensures that the printer does not falsely
detect paper from a dirty or shiny platen, or fail to detect paper that is
off-white in color. You can set the PTHRESH parameter to the optimal
setting automatically by performing the
Re-Calibrating the Paper
Sensor
procedure described earlier in this section. The purpose of the
PTHRESH parameter is to allow you to fine-adjust the automatic setting.
PTHRESH parameter settings range from
0
to
255
. Lowering the
setting causes printer logic to require more reflectivity (whiteness) before
recognizing paper and increasing the setting causes printer logic to require
less reflectivity.
)
Note:
If the paper sensor re-calibration sets the PTHRESH param-
eter to a value or
150 or lower
, the platen surface is too dirty (reflective)
for reliable paper sensing to occur. To correct this problem, perform the
Cleaning the Platen and Bail Rollers
procedure in the
Cleaning and
Maintenance
section of this guide. Then, perform the
Re-Calibrating
the Paper Sensor
procedure again.
54) HOME: 0/120"
55) PTHRESH: 208
User's Guide
Solving Problems 6-31
Fine-Adjusting the
Carriage Home Position
HOME lets you fine-adjust the carriage home position, which determines
the location of the leftmost print position on a page. This parameter en-
sures that the leftmost print position aligns exactly with the "0" mark on
the paper scale. The fine-adjustment is expressed in 1/120-inch incre-
ments. HOME parameter settings can range from
-6
to
24
. Negative
settings move the carriage home position farther left and positive settings
move it farther right.
Fine-Adjusting the Paper Sensor
PTHRESH lets you fine-adjust the amount of reflectivity that the paper
sensor must sense before printer logic recognizes that paper is loaded in
the printer. This parameter ensures that the printer does not falsely
detect paper from a dirty or shiny platen, or fail to detect paper that is
off-white in color. You can set the PTHRESH parameter to the optimal
setting automatically by performing the
Re-Calibrating the Paper
Sensor
procedure described earlier in this section. The purpose of the
PTHRESH parameter is to allow you to fine-adjust the automatic setting.
PTHRESH parameter settings range from
0
to
255
. Lowering the
setting causes printer logic to require more reflectivity (whiteness) before
recognizing paper and increasing the setting causes printer logic to require
less reflectivity.
)
Note:
If the paper sensor re-calibration sets the PTHRESH param-
eter to a value or
150 or lower
, the platen surface is too dirty (reflective)
for reliable paper sensing to occur. To correct this problem, perform the
Cleaning the Platen and Bail Rollers
procedure in the
Cleaning and
Maintenance
section of this guide. Then, perform the
Re-Calibrating
the Paper Sensor
procedure again.
54) HOME: 0/120"
55) PTHRESH: 208
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