Canon 3260 manual VII. Measurement and Adjustment, Side registration adjustment of the cassette

CHAPTER 4

VII. MEASUREMENT AND ADJUSTMENT

A. Mechanical Adjustment

1. Checking the nip width of the lower fixing roller

The fixing unit is not designed to allow adjustment of the pressure (nip width); however, the incorrect nip width can cause fixing problems.

Follow the procedures below to check the nip width:

1)Make an all-black print using an EP-72 cartridge, and take the print to the customer’s site. (Use the printer driver tester to output an all-black print.)

2)Place the all-black print in the lower cassette of the printer, with the printed side facing down.

3)Press the test print switch.

4)Turn OFF the printer when the leading edge of the print emerges at the face-down tray. Turn ON the printer 10 seconds later, and operate the printer to deliver the print.

5)Measure the width of the glossy band across the paper and check that it meets the require- ments as shown in Figure 4-7-1.

•Center (a) : 6.5 ± 1.0mm

•Left/right side (b) : 6.9 ± 1.0mm

•Difference between right side and left side (b-c) : 1.0mm or less

•Difference between right/left sides and center (b-a, c-a) : 1.5mm or less

Feed-out direction

b

Center of A3- sized paper

a

b

Figure 4-7-1

2. Side registration adjustment of the cassette

When the side registration of the cassette is not aligned, this adjustment needs to be made. The side registration adjustment levers (see Figure 4-7-2) in the upper and lower cassettes

are adjusted in the factory. Therefore, there is no need to make any adjustments when installing the printer. However, when either upper or lower cassette is replaced in the field, re-adjustment of the left margin is necessary. This procedure is outlined below.

1)Load 20 to 30 sheets of paper into the cassette. Then, using the printer driver tester, print several pages of all-black or horizontal line test prints.

2)Measure the distance (a) between the left edge of the page to the edge of the printed pattern (see Figure 4-7-2). Measure several test prints to find the average distance.

3)Move the side registration adjustment lever based on Figure 4-7-2 so that the distance mea- sured in step 2) become 3.0mm. (one notch alters length (a) by 0.5mm.)

For example, if the average length of step 2) is 2.0mm, by moving the lever 2 steps clockwise the necessary adjustment of 1.0mm can be made.

4)Make several more test prints. Make sure that the left margin is 3.0mm by repeating step 2) above.

If the margin needs further adjustment, repeat steps 1) to 3) again.

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