B. Mechanism section
(1) Image lead edge position adjustment (SIM 50-1/SIM 50-10)
a. OC image lead edge position adjustment
Note: In advance to this adjustment, the sub scanning magnification
ratio adjustment must be performed.
1) Set a scale on the OC table as shown below.
2) Make a copy.
3) Check the copy output. If necessary, perform the following adjust-
ment procedures.
4) Execute SIM 50-1.
5) Set the OC lead edge position set value (Exposure display
<AUTO> ON) to “99.”
The OC image scanning start position is shifted inside the docu-
ment edge.
6) Set the main cassette lead edge void adjustment value (Exposure
display <PHOTO> ON) * to “1.”
The lead edge void becomes the minimum.
7) Set the print start position value (Exposure display <EXP1> ON)
to “99” and make a copy.
The print start position is shifted inside the document edge.
8) Measure the image loss R of the copied image. Enter the set
value of the image scanning lead edge position (Exposure display
<AUTO> ON) again.
●
1 step of the set value corresponds to about 0.127 mm shift.
●
Calculate the set value from the formula below.
99 - R/0.127 (mm) = Image loss set value <R: Image loss meas-
urement value (mm)>
Example: 99 - 4/0.127 = 99 - 31.5 = about 67
Note: If the set value is not obtained from the above formula, per-
form the fine adjustment.
9) Measure the distance H between the paper lead edge and the
image print start position. Set the image print start position set
value (Exposure display <EXP1> ON) again.
●
1 step of the set value corresponds to about 0.127 mm shift.
●
Calculate the set value from the formula below.
99 - H/0.127 (mm) = Image print start position set value <H: Print
start position measurement value (mm)>
Example: 99 - 5/0.127 = 99 - 39.4 = about 59
Note: If the set value is not obtained from the above formula, per-
form the fine adjustment.
5
10
5mm
4mm
*
The dimension varies depending on the model.
10
5mm
0mm
5
*
The scanning edge is set.
(A line may be printed by scanning the document edge.)
5
10
0mm
0mm
*
Fit the print edge with the paper edge, and perform the
lead edge adjustment.
DM-2000
6 – 2