Oki LP-1040 Maintenance Manual page 567

6.
Calculate the correction value as explained here.
Example 1:
The top edge alignment value is too short, when
Standard value = 21.7mm (0.85 inches) ±3mm (0.12 inches)
Paper length = 18.2 mm (0.72 inches)
(a) Find the difference from the standard value.
18.2 (0.72 inches) - 21.7 (0.85 inches)＝-3.5 mm (0.13 inches)
(b) By converting that difference into a process speed you can find out how many seconds
that equals.
Process speed = 80 mm (3.15 inches)/sec
-3.5 ÷ 80 = -0.04375 (sec)
which indicates that printing starts 43.75 msec sooner.
(c) Calculate the amount to increase/decrease to return to the standard value.
1 step = 1.0 msec
43.75 ÷ 1 = 43.75or 44 (steps)
(d) Check the value saved to the EEPROM.
Default value = 400 * steps
* The default value varies depending on the print length and roll paper specifications.
(e) Calculate and set the correction value.
400 + 44 = 444 (steps)
Example 2:
The top edge alignment value is too long, when
Standard value = 21.7mm (0.85 inches) ±3mm (0.12 inches)
Measured value = 25.7 mm (1.01 inches)
(a) Find the difference from the standard value.
25.7 (1.01 inches) - 21.7 (0.85 inches)＝4.0 mm (0.16 inches)
(b) Convert the difference to the process speed, by calculating how many seconds are equal
to the difference.
Process speed = 80mm (3.15 inches)/sec
4.0 ÷ 80 = 0.05 (sec)
which indicates that printing starts 50 msec later.
(c) Calculate the amount to increase/decrease to return to the standard value.
1 step = 1.0 msec
50.0 ÷ 1 = 50.0 or 50 (steps)
(d) Check the value saved to the EEPROM.
Default value = 400 * steps
* The default value varies depending on the print length and roll paper specifications.
(e) Calculate and set the correction value.
400 -50 = 350 (steps)
Chapter 10 Printer Calibrationt
10-35