Allowable Duty Cycle (Measured Over One Minute Of Continuous Printing); Ribbon Life - NCR 7158 Owner's Manual

5-16 Chapter 5: Technical Specifications
Dimension Standard
mm
A .36
B .35
C 1.46
D 2.47
E 1.83
F N/A
G .35
Max.
Allowable Duty Cycle (measured over one minute of continuous
printing)
The impact printhead can continuously print the following average
number of characters over a one minute period.
Ambient Temperature in degrees:
11.5 Dots/Char. avg.:
15.0 Dots/Char. avg.:
19.0 Dots/Char. avg.:
No one print wire may exceed 18% of the dots printed.

Ribbon Life

The snap-on purple and black ink ribbon cassettes are available in 3
and 5 million character cartridge lives.
Compressed
inch mm inch
.0144 .30 .0117
.0139 .35 .0139
.0576 1.19 .0468
.0973 2.47 .0973
.0720 1.48 .0585
N/A N/A N/A
.014 .35 .014
Max. Max. Max.
5C
7200CH
5700CH
4200CH
Rotated
mm inch
.36 .0144
.35 .0139
2.56 .1008
1.76 . 0695
3.66 .1440
2.11 .0834
.35 .014"
Max.
Max
.
20C 35C
6000CH 4800CH
4800CH 3900CH
3600CH 3000CH
50C
3600CH
3000CH
2400CH