Ricoh FW780 Service Manual - Page 433

CUT LENGTH ADJUSTMENT 3.7 CUT LENGTH ADJUSTMENT The cut length adjustment should be done when the roll feeder is installed to correct cutting errors. The cut error correction data is determined in the factory without the copier installed. The cut length varies depending on the copier on which it is installed and/or paper type used. If required, adjust the cut length as follows: NOTE: The cut length should be measured 10 minutes or later after copying because the fusing unit dries the paper and reduces its length temporarily. Preset Cut : Adjustment standards: ±3 mm (for Length Shorter than 420 mm) ±5 mm (for 420 to 1,189 mm) ±11 mm (3,000 mm) NOTE: 1) There are three settings of the cut length depending on the temperature mode. They are set in the factory to match a standard paper type. [Normal (SP#42, 45, 87), High (SP#43, 46, 88), Low (SP#44, 47, 89)]. 2) There are two settings of SP#42 to 47 when the 2 rolls feeder is installed. Adjust the 2nd roll cut length by the same manner of the 1st roll cut length adjustment. Repeat the same steps after 1st roll cut length adjustment. 1. Make 5 copy samples of A0 lengthwise (1189) and A3 sideways (297) in the preset cut mode. 2. Measure the difference of the length between the each copy sample and preset cut length (1189 and 297). Then, calculate the average difference. 3. Input the average value using SP modes #42 to 47 so that the cut length is within the adjustment standards. Example: 1) Current SP data #42....0 Copy sample length = 297 + 4 Set SP mode #42...-4.0 2) Current SP data #42....0 Copy sample length = 297 - 4 Set SP mode #42...+4.0 4. Make A0 lengthwise and A3 sideways copies using preset cut mode and check their length. 5. Repeat steps 2 to 4 if necessary. 6. Make 5 copy samples of 3,000 mm length. Make sure the average cut length is within the adjustment standards. 7. If it is not within the adjustment standards, change the values using SP modes #87 to 89. Roll Feed Unit B435/B436 SM 7-13 B435/B436