Utax DF 420, Service Manual, Page: 25 / 53

3MJ
1-3-4
U053
Setting the adjustment of the motor speed
Description
Performs fine adjustment of the speeds of the motors.
Purpose
To adjust the speed of the respective motors when the magnification is not correct.
Method
1. Press the start key.
2. Select the item to be adjusted using the cursor up/down keys.
Adjustment
1. Press the interrupt key.
2. Press the start key to output an A3/Ledger VTC pattern.
Figure 1-3-1
3. Change the setting value using the cursor left/right keys.
A: Drive motor speed adjustment
Increasing the setting makes the image longer in the auxiliary scanning direction, and decreasing it
makes the image shorter in the auxiliary scanning direction.
B: Polygon motor speed adjustment
Increasing the setting makes the image shorter in the main scanning direction, and decreasing it
makes the image longer in the main scanning direction.
4. Press the start key. The value is set.
Completion
Press the stop/clear key. The screen for selecting a maintenance item No. is displayed.
Maintenance
item No.
Description
Display Description Setting
range Initial
setting
MAIN Drive motor speed adjustment -5.0 to 5.0 0.3
POLY Polygon motor speed adjustment -5.0 to 5.0 0.7
EJE Eject motor speed adjustment -5.0 to 5.0 -0.5
DRUM Drum motor speed adjustment -5.0 to 5.0 0.0
BYP Motor speed adjustment
(for paper feed from MP tray) -5.0 to 5.0 -0.1
CAS Motor speed adjustment
(for paper feed from optional paper feeder) -5.0 to 5.0 -0.1
DUP Motor speed adjustment (for duplex mode) -5.0 to 5.0 -0.3
EJE2 Eject motor speed
(optional ejection correction value in the case of
paper size of A3, B4 and Ledger) -5.0 to 5.0 0.0
EJE3 Eject motor speed
(optional ejection correction value in the case of
paper size other than those above) -5.0 to 5.0 0.0
EJE4 Eject motor speed
(ejection motor correction value at the time of duplex
inner ejection) 0.0 to 5.0 0.5
DF Paper conveying motor speed adjustment
(for built-in finisher) -4.0 to 4.0 0.0
Correct values for an A3/Ledger output are:
A = 300
±
1.0 mm
B = 270
±
1.0 mm