Microcom 438T Operator's Manual page 61

Chapter 4
The values for header elements requiring measurements are expressed as thermal dots or
pixels. Dot or pixel size varies depending upon the print resolution of the print head. The
dot size of a 300 dots per inch head (12 dots/mm) is 0.0033". The dot size is the same in
both the horizontal and vertical direction. For example, a 4" X 6" label printed with a 300
DPI print head would be 1200 (4 X 300 dots in the horizontal or "X" direction, and 1800 (6 X
300) dots in the "Y" direction.
While the maximum number of dots in the horizontal or "X" direction is limited by print head
size, it is virtually unlimited in the vertical or "Y" direction. Vertical dot rows are "stepped" by
the drive roller motor.
This is a list of the header element mnemonics for the sample label in Figure 4-2:
HFM, LSX, LSY, WEB, GAP, DPS, LCB, AGD, SPG, OFX, OFY
5 1280
Web Value
.0625" or
19 Dots
X beginning
This is the
origin; 1,1
438T Operator's Manual - 880051-0102
900 19 38
Feed Direction
4" PRINT HEAD
Microcom
Corporation
Thermal Printing Solutions
012345
Y beginning
4.266" or 1280 Dots
(Total Print Head Dots)
Figure 4-3
7 0 1
LSX
Header Elements
Designing Labels with LDS
395 0 0
LSY
3.0" or 900 Dots
Gap Value
.125" or 38 Dots
4-5