Toshiba e-studio182, Service Manual

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© 2009 TOSHIBA TEC CORPORATION All rights reserved e-STUDIO182/212/242
SCANNER
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Description of input signal
Clock input SCNCLK Input The scan motor is rotated by inputting the pulses (CLK).
* Internal circuit of the motor driver works when the first
pulse of the input becomes ON.
* The maximum input clock is 9000 PPS.
Motor rotation direction setting SCNDIR Input The direction of the motor rotation is determined by setting
the level of the signal.
“H”: Clockwise direction
“L”: Counterclockwise direction
* The rotation direction within 7 µsec. before the first
pulse of the CLK comes should not be changed ON
and after the last pulse goes OFF.
Cutting off of the drive output SCNEN Input Forcibly turn ON/OFF the excitation drive.
“H”: Normal operation (Excited)
“L”: Excitation drive is forcibly shut off (Not excited)
Excitation mode Setting-1 SCNMD0 Input Sets the excitation mode.
* The setting should not be changed within 7µsec. after
the first pulse of the CLK comes ON.
Resetting SCANRST Input Resets the whole system.
“L” (10 µsec. or more): Internal circuit of the driver is
initialized.
* The motor drive circuit is automatically reset when the
power is turned ON.
Voltage to set value for the
motor current
SCNNVR Input Sets the reference current value for the constant current
detection.
Motor wire current value can be set in the range of 0 to 2.0
(A)/phase by applying the analog voltage of 0 to 5 (V).