Adjust Contrast Window (Volatile - ^D35); Adjust Contrast Base (Non-Volatile - ^D36); Registration Mark Threshold Commands - Microcom 424 Operator's Manual

Chapter 5
5.2.4.1

Adjust Contrast Window (Volatile - ^D35)

This command is useful for adjusting contrast for specific label formats where different label
media is used on a single printer. The command can be entered into specific label formats
rather than affecting print contrast on all label formats.
^A ^D COMMAND
XX 35 Adjust Contrast Window: This is a volatile command used to adjust the
contrast window. The range is 1 to 9 of the base (^D36).
5.2.4.2

Adjust Contrast Base (Non-volatile - ^D36)

This command is used to adjust overall contrast on all formats.
^A ^D COMMAND
XX 36 Adjust Contrast Base: This non-volatile command is used to skew the entire
contrast window (^D35). This command has a ^A range of 10 to 200%.
5.2.5

Registration Mark Threshold Commands

While the printer is designed to work with a wide variety of label media, it is sometimes
necessary to adjust the printer's thresholds in order to obtain proper registration and
operation. The numerical value in which the printer senses a registration mark is referred as
the threshold value.
The Threshold Value may be obtained by using the Auto-Size Label Command (^D39). A
more in-depth explanation of registration mark sensing and adjusting the threshold value is
found in the 428M Service Manual.
^A ^D COMMAND
XX 90 Reflective Detection Threshold: This command is non-volatile and is used
to set the reflective or black line threshold value (0-255) at which the printer
detects a black line used for print registration. The default is set to a value of
100 and should work for most media types.
XX 91 Transmissive Detection Threshold: This non-volatile command is used to
set the transmissive or GAP threshold value (0-255) at which the printer
detects gap and/or blow-hole registration marks. The default is set to a value
of 30 and should work for most media types.
XX 124 Stock Out Threshold: This command is non-volatile and is used to set the
stock out threshold value (0-255) at which the printer detects an out of stock or
>LOW STOCK< error condition. The threshold is typically set to a value that is
80 percent of the transmissive sensor reading when no media is detected by
the transmissive sensor. This value is calibrated at the factory and should not
require adjustment unless the transmissive sensor has been replaced.
X 129 Auto Set Threshold: This command will cause the printer to scroll 1350 dots,
determine the proper threshold value, and set the nonvolatile threshold for
proper registration. The ^Ax selects either reflective or transmissive detection.
0 Automatically sets the transmissive threshold value.
1 Automatically sets the reflective threshold value.
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Printer Commands
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