Microcom 428LT Operator's Manual page 36

Designing Labels Using LDS
For example: Imagine the same format as mentioned above that has an LSY value of 900
(3" x 300 = 900), an SPG value of 385, and an AGD value of "0" that contains 100 format
lines. If text data is provided for the first 50 lines and the remaining 50 lines are left empty,
then the printer will print the first 50 lines, advance the next 50 lines, advance the remaining
LSY value, and then finally advance the SPG or 385 dots. Regardless of the format fields, if
the LSY is set to 900 and the SPG is set to 385 the printer will advance a total of 1285 dots
(900+385=1285).
4.4.7.2 Black Line Media (Reflective) (setting = 3)
The Reflective Black Line method is used when media uses a black line for a registration
mark; a "3" should be entered in the LCB parameter. This setting will detect the leading
edge of the black line by using the reflective sensor only. The light from the emitter in the
lower sensor is reflected down to the detector in the lower sensor.
4.4.8 AGD (Activate Gap Detector)
HFM, LSX, LSY, WEB, GAP, DPS, LCB,
This parameter selects the number of step (dot rows) that the printer will skip before
registration mark sensing is activated. This value is usually set to "1". It is a good idea to
set it to a value to ignore areas of pre-printed or perforated stock that might cause incorrect
registration mark detection.
4.4.9 SPG (Steps Past Gap)
HFM, LSX, LSY, WEB, GAP, DPS, LCB, AGD,
This parameter is used to specify the number of steps (thermal dots) to advance the media
after a registration mark has been detected. This parameter is required to properly register
print on each label. The table below lists proper SPG settings for particular printer
configurations when the LSY is greater than the D2G parameter value, the D2G value is
used.
Registration Sensor/Print Head DPI
Reflective (Blackline) / 203 DPI
Reflective (Blackline) / 300 DPI
For media that has a LSY value less than the D2G parameter value in table 4-2, the SPG
will need to be calculated. SPG can be calculated using this formula:
SPG = (D2G + LSY - DRM) mod (LSY + SBL)
NOTE: All values are in pixels or dots.
D2G = This is a physical distance from the registration sensor being used to the print
head's dot row, and is a specific value for each model; see Table 4-2
LSY = This is the actual height of the media or printable surface in pixels or dots.
4-8
Table 4-2 Dot to Gap Parameters
AGD
, SPG, OFX, OFY
SPG
, OFX, OFY
D2G Value
316
467
428LT Operator's Manual - 880040-0200
Chapter 4