The Scanner starts the scan motion as a Scan Sel signal (PJ1-3) is output
from PWB-A. At the start of a scan motion and other heavy load conditions,
Scanner Motor M5 requires a large amount of current. The Current 1 or 2
signal (PJ1-10 or 11) from PWB-A is selected accordingly to vary the amount
of current supplied to M5.
*
The Current signal selection timing is controlled by software.
Current 1 HLL
Current 2 HHL
Current Approx. 0.56A Approx. 0.65A Approx. 0.85A
When the scan
speed reaches a
given level and
during return
braking.
At scan start and
when the return
speed reaches a
given level.
At return start and
at scan start for low
zoom ratio
On receiving the Scan Sel signal, Motor Drive Board PWB-E applies motor
drive pulses, which are out-of-phase with each other, to M5. The motor
speed is varied by changing the width of the pulses applied to M5.
1139C15MAA
M-39
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