Oki ML591 MICROLINE Reference Manual - Page 131

Table 64: IBM/Epson n/360" Line Spacing Commands - Values of Parameter n Emulation IBM Epson Values of n 1 to 255 0 to 255 Whenever a value of zero is assigned to n, the line spacing command will be ignored. Set Vertical Units (IBM) ߜ ML390 Turbo, ML391 Turbo ߜ ML590, ML591 Function ASCII Dec Set Vertical Units ESC [ \ 4 0 0 0 27 91 92 52 48 48 48 0 0 n 48 48 n Hex 1B 5B 5C 34 30 30 30 30 30 n This command defines the vertical spacing units used by the ESC 3 n command in the IBM emulation (described above), as follows: Table 65: IBM ESC [ \ Command - Values of Parameter n Values of n 180 216 Spacing Unit 1/180" 1/216" Vertical Tab Commands When you turn your printer on, it doesn't have any vertical tab stops. Sending a VT command with no stops set will produce a single line feed. The commands described below are used to set vertical tab stops. In the Epson and MICROLINE Standard emulations, you have the option of entering a single set of vertical tab stops or of using the electronic Vertical Format Unit (VFU) to program multiple sets of vertical tabs, called channels. The IBM emulation permits you to enter one set of stops, but does not have the VFU feature. The actual position of the stops depends on the line spacing in effect when you send the command. For example, at 6 lines per inch, a tab stop of 24 will appear four inches from the top of the page, whereas at 8 lines per inch, the stop will be positioned three inches from the top of the page. However, once you've set the vertical tab stops, their position is absolute, and won't move, even if you later change the line spacing. Chapter 9: Vertical Control Commands 93