36
Chapter
4
Line Matrix Printing
When the shuttle reaches the end of a sweep, it reverses direction, the paper
is advanced one dot row, and the hammers print the next row of dots as the
shuttle sweeps in the opposite direction. After a line of characters is printed,
hammer action stops and the paper advances to the first dot row of the next
print line. The number of dot rows allowed for line separation depends on the
vertical line spacing the user selects.
The dot matrix patterns of text characters vary according to the font the user
selects. For example, in the data processing (DP) font at a line spacing of six
lines per inch (lpi), a dot matrix contains 12 dot rows from the top of one
character line to the top of the next. (See Figure 8 and Figure 9.) At eight lpi
there are nine dot rows per character line, at nine lpi eight dot rows per
character line, and so on.
Each individual hammer spring forms more than one character as the shuttle
moves horizontally. This principle is illustrated in Figure 10.
Figure 9. Standard Character Formation
1
2
3
4
5
6
7
8
9
10
11
n
1
2
*
* *
One
Text
Line
Paper
Feed
Direction
Number of rows determined by line spacing
Direction of Shuttle Movement
* This row is used only for lowercase descenders
** This row is used for underlining and lowercase descenders
Dot
Row
Start
Summary of Contents for 6400 Series
Page 2: ......
Page 12: ...Table of Contents...
Page 28: ...28 Chapter 2 Installing And Configuring The IBM 6400 Printer...
Page 34: ...34 Chapter 3 Cleaning The Printer...
Page 184: ...184 Chapter 6 Ethernet Initialization...
Page 267: ...Illustrations Of Printer Components 267 Illustrated parts lists continue on next page...
Page 271: ...Illustrations Of Printer Components 271 Illustrated parts lists continue on next page...
Page 286: ...286 Chapter 7 Section II Illustrated Parts Lists...
Page 299: ...299 Cable Routing Cabinet Model...
Page 301: ...301 Cable Routing Pedestal Model...
Page 305: ...305 Cable Assembly 5V Remote Power 14H5589...
Page 307: ...307 Cable Assembly AC In Power Supply To Power Supply J1 To Circuit Breaker AC Kit 14H5289...
Page 309: ...309 Cable Assembly Card Cage Fan PIN 1 PIN 1 14H5285...
Page 311: ...311 Cable Assembly Exhaust Fan PIN 1 PIN 1 14H5286...
Page 312: ...312 Appendix A Circuit Board And Cable Pinouts Cable Assembly Hammer Bank Logic 14H5279...
Page 313: ...313 Cable Assembly Hammer Bank Power PIN 1 PIN 1 02N6214...
Page 316: ...316 Appendix A Circuit Board And Cable Pinouts Cable Assembly Ribbon Motor Extension 63H7464...
Page 317: ...317 Cable Assembly Shuttle Motor Drive 14H5330...
Page 319: ...319 Logic Cable Power Stacker 24H8976...
Page 320: ...320 Appendix A Circuit Board And Cable Pinouts Power Cable Power Stacker 24H8975...
Page 321: ...321 Vertical Rail Cable Power Stacker Reference only not spared...
Page 323: ...323 Magnetic Pickup MPU Assembly 57G1476...
Page 325: ...325 Switch Assembly Platen Interlock P107 PLO 14H5280...
Page 326: ...326 Appendix A Circuit Board And Cable Pinouts Switch Assembly Cover Open 14H5282...
Page 340: ...340 Appendix D...
Page 354: ...354 Appendix F WR Write w With w o Without XMT Transmit...
Page 403: ...403 Figure 91 Stacker Detail Rollers 75 80 85 90 85 80 From page 401...
Page 420: ...420...
Page 421: ...Preliminary 1...
Page 422: ...Copyright IBM Corp 1995 2000 S246 0117 08 164636 001B 07S246011708 01P4612 0401P4612...