An Introduction to Dot Matrix Printing
Figure
For a complete listing of all the standard
We have seen that all the characters are a uniform 7 dots high. What Appendix C doesn’t show is that the spacing between the lines is a fixed 5 dots. This makes each text line a total of 12 dots high.
Blank Space
Top of Line
‘Blank Lines
Top of Line
Blank Lines
Figure
Here’s another way of looking at it. There are 12 dots from the top of one row of text to the top of the next row. Since the spacing between each pin on the print head is l/72”, each line requires 7/72 + 5/72 = 12/72, or l/6 of an inch. 6 lines per inch. No - it isn’t just a coincidence.
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