Commodore MPS-801 - Line Feed Flowchart

3. Line feed flowchart
LFPW
DRIVE TIMING
LF1 (P3/4)
LF2 (P3/3)
LF3 (P3/6)
LF4 (P3/5)
~'
LF CNT: A step counter for the LF stepping motor.
LF STEP
REG:
LF PW:
A register memorizing the number
of steps
per line feed.
Power
for the LF stepping motor.
I I
1 ___ , 1 Oms
I
1/144 inch is the smallest unit of movement and occurs when the LF stepping motor is driven one step. 24 pulses
of the DRIVE TIMING perform a line feed of 24 X 1/144= 1/6 inch.
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