HP LineJet Printers - PCL-II/LinePrinter Plus Technical Reference Manual, 171249-001PX

158
Chapter 5 Overview
Epson Emulation Exceptions and Differences
Because of mechanical differences between your line matrix printer and
Epson printers (moving printhead serial matrix printers), some Epson features
are approximated or not supported.
• Epson codes that produce different behavior in your printer are indicated
by a “dagger” (
†
) in the Control Code Index.
• The Epson emulation supports the following fonts: DP, NLQ Serif and
Sans Serif, Draft with 10 cpi, 12 cpi and 15 cpi in either condensed or
normal widths, and OCR A and OCR B in 10 cpi. Condensed printing at
10 cpi in DP quality maps to 17.1 cpi. Character pitches other than 10 DP
cpi map to 20 cpi in DP and 17.1 cpi in NLQ.
• Epson bit-image graphics are supported, including all plotter and CRT
densities.
• Many character sets are available, including IBM-PC Graphics (IBM Code
Page 0437) and Epson. You can configure the zero character to contain a
slash or no slash.
• The Double Wide print control codes (ESC W, SO) double character
width, but
not inter-character spacing, unlike the Epson FX-1050. The
formulas for total character spacing are as follows:
Epson FX-1050 2 (char + 1 dot + space)
Epson Emulation 2 (char + 1 dot) + space
• The Condensed Print (SI) control code condenses character width but not
inter-character spacing, unlike the Epson FX-1050 which condenses both
character width and spacing.
• If one or more Backspace control codes follow directly after a Bit Image
Graphics command (ESC K, ESC L, ESC Y, or ESC Z), the printer will
backspace into the graphic pattern, the number of dots depending on the
current cpi setting. For an Epson FX-1050 printer, one Backspace will
send the logical printhead directly to the beginning of the graphics
pattern.
• When backspacing over proportionally spaced characters, Epson printers
move back the width of each proportional character; this emulation moves
back based on the current cpi setting, as if proportional spacing is
disabled.