Microcom 428T - Manual (Page 69)

Chapter 4 Designing Labels with LDS
428T Operator’s Manual - 880037-0141 4-9
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.
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 203 DPI printer is 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)
SPG = (264 + 203 - 203) mod (203 + 25)
SPG = 264 mod 228
SPG = 36
D2G (264) = The Dot to Gap distance for the transmissive sensor (Table 4-2).
LSY (203) =
The height of the printable area; 1" x 203 DPI = 203 dots.
SBL (25) =
The Space Between Labels, or die-cut GAP in this case;
.125" x 203 DPI = 25 dots.
DRM (203) =
The Distance to Registration Mark is from the leading edge of
the printable area to the next registration mark;
1" x 203 DPI = 203 dots.
The SPG may also be determined by adding a line at dot row #1 using Line Draw (See
Section 4.7) and adjusting the SPG number up and down to get desirable registration with
the line printing at the bottom edge of the media.