42114101 Rev.1
21 /
(d)
Simultaneous Compensation of the number of impact pins
The LSI is provided with the compensation table for each pin to make necessary
compensation.
Print Compensation Control
The print compensation can be made as shown below:
(a)
Voltage compensation (See 2.1.8 “Alarm Circuit.”)
(b)
Temperature compensation (See 2.1.8 “Alarm Circuit.”)
(c)
Pin stroke compensation
As shown in the drawing left, the stroke length
up to the platen is different for each pin.
Number of impact pins
Few
Many
Drive time
Short
Long
Print Head
Time
Pin 5~20
Pin 1~4,
21~24
Pin coil
current
Pin 1~4
5~20
21~24
Platen
(e)
Print mode compensation
According to the thickness of the printing medium, the print mode is compensated
as shown in the table below:
(Drive time lengthens at each step.)
Head Gap Range
1
2
3
4
5
Print speed
100%
90%
85%
85%
70%
Drive time
Short Long
Summary of Contents for ML490 Series
Page 1: ...42114101 Rev 1 1 135 ML490 491 PRINTER Maintenance Manual ODA...
Page 2: ...42114101 Rev 1 2...
Page 38: ...42114101 Rev 1 38 Drive gear Ink tank Ribbon cartridge Figure 2 6...
Page 48: ...42114101 Rev 1 48 Change arm Change lever Platen Release cam Figure 2 13 REAR TOP BOTTOM...
Page 96: ...42114101 Rev 1 96 9 Carriage Assy NK2 10 SUS Bearing portion of guide roller EM 30L B...
Page 119: ...42114101 Rev 1 119 6 8 9 7 1 2 3 11 10 4 5 Figure B 2 Printer General Assy...
Page 124: ...42114101 Rev 1 124 9 12 11 1 13 3 7 1 14 5 6 7 2 10 8 Figure B 4 Carriage Assy...