15. Adjusting the Nip (tightening the pressure adjusting nut)The nip width is correct if it is as indicated in Table 6-201. Otherwise, turn thepressure adjusting nut.Figure 6-229a and c represent points 10 mm from both ends of copy paper.*Be sure both upper and lower rollers aresufficiently warm before taking measurements.Table 6-201a. Measuring the NipWait for 15 min after the copier finishes its warm-up period, and make 20 copies ofA4; then, perform the following to measure the nip:1) Place A3 paper, and select A3.2) Open the copyboard cover.3) Start service mode (*4*); using the >> key, select ‘NIP’ in nip measurement mode.4) Press the * key (user mode).The machine will pick up paper, and will be ready for measurement.Reference:The paper will be stopped halfway once; it will then be automatically discharged inabout 10 sec.5) Measure the nip.FeedingdirectioncaA3 sizeCenter ofcopy paperbCOPYRIGHT © 1997 CANON INC. CANON NP6350/NP6251 REV. 0 JULY 1997 PRINTED IN JAPAN (IMPRIME AU JAPON)CHAPTER 6 FIXING SYSTEM6-33Caution:Dimensionsb| a – c |Measurements*7.3 ± 0.5 mm0.5 mm or less
