Chapter 4
Designing Labels with LDS
324M/424M Operator’s Manual - 880026-0144
4-9
This parameter selects the number of step (dot rows) that the printer should skip before gap
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 gap detection.
4.4.9
SPG (Steps Past Gap)
HFM, LSX, LSY, WEB, GAP, DPS, LCB, AGD,
SPG
, OFX, OFY
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 parameter value.
Model/Print Head DPI
D2G Value
324M/424M – 203 DPI
284
324M/424M – 300 DPI
438
Table 4-3
Dot to Gap Parameters
For media that has a LSY value less than the parameter value in table 4-3, 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 sensors to the print head's dot row,
and is a specific value for each model.
LSY = This is the actual height of the media in pixels or dots.
DRM = The Distance to Registration Mark is the distance from the leading edge of the
printable area to the beginning of the registration mark.
SBL = The Space Between Labels is the non-printable distance between the media,
typically found on die-cut labels. If the media contains space between the actual
printable portions of the media being used, this would be the SBL parameter.
Please note that this does not reflect a blowhole or black line height, as these
registration marks are typically positioned within the printable area. When die-cut
media is used, this value is also used in the GAP header parameter.
Calculation Examples:
Die-cut Media:
A 424M 203 DPI printer being used with 3" x 1" media containing a .125" die-cut gap. The
SPG would be calculated as follows:
SPG = (D2G + LSY - DRM) mod (LSY + SBL)
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