[ask]about ir5070/5570 fixing unit

[Guest]

i have a question regarding ir 5070/5570/6570 series fixing unit.does it use fixing film or rollers? heating elements or halogen lamps? in the spec sheet it says induction heating fusing system.what does it means? an explanation/pictures will be highly appreciated.thanks

[Guest]

It heats up faster, approx 30 seconds. Its an holder unit that is inserted into the fixing roller with a copper color sheet called a shutter, that opens and closes with the help of the shutter motor. When you power the machine on you can hear the shutter motor move the shutter open for about 3 sec. You usually get a E840 if there is a problem.

[jonhs237]

Induction heating works on the principle of a magnetic field exciting the molecules in the steel core of the upper fixing roller. A non-magnetic shutter is used to block this field in order to controll the temperature. There is just a heavy copper coil inside the fixing roller instead of a lamp to heat the fuser up. It happens much more rapidly than a lamp could. Hope this helps.

[simohayha]

Thanks for the replies guys,so if i dont get it wrong it still uses upper and lower fixing rollers but the difference is instead using halogen lamps, these machines uses a new heating mechanism inside the upper fixing roller.right?

jonhs237:this heavy copper coil inside the upper roller......is it a "consumables" like halogen lamps or its the "repairable"kind? if the heating system managed to fails that is.
what about other fixing parts, like web,fixing motor,exits roller,etc.....is it similar to ir 5000 or a completely different system? im comparing it with ir5000 series since those are the closest type to ir5070 that im familiar with.
thanks again guys

[CopierTechofOmens]

The fixing unit is scheduled for following parts: Fixing roller rated 500,000 ;Pressure roller rated 500,000 ;Fixing web rated 500,000 ;Insulating bushing rated 500,000

There are some other parts thermistors and such. BTW this is like going from playing with yourself to being with a naked woman. The difference between a 5000 and a 5070

[jonhs237]

If you are trying to figure out how to service it in comparison to a 5000 you need to be aware that while they look similar there are key differences in servicing them. The flux shield is rotated by a weak motor drive and will not tolerate any bending of the shield. It also is held in place at either end by gears that have to be kept in alignment (Canon supplies pins for this screwed in at either end) during disassembly. The coil and flux shield will pull out the back side of the upper roller pretty easily once you have the gears locked in place and remove the screws on the rear end plate. The upper assy clam shells off the same way as a 5000 but there are alot more wires to unplug because of the connetor to the home position sensor for the shield and extra thermistor. See attached PDF for more info.

[simohayha]

thanks alot sir jonhs237,the pdf file really helps alot.

[CanonHPTech]

This assembly can be very needy... the Lower Fixing Roller and Bearings have to be replaced every 200k to 300k to avoid squeaking and popping noises, bad nip pressure (due to worn down rear shaft) and jams. The Thermistors are better replaced than cleaned if they give you E001-3 codes. The drive gear on the Upper Fixing Roller can develop either a hairline crack in it or the key develops a slight ship in it which causes a very similar popping noise just the same as defective Lower Fixing Roller and Bearings. As far as dissasembling the Fixing Assembly to swap the fixing roller, you have to be very careful. My advice is to lock the locking pins on both sides, turn the fixing assembly upside down flat (remove the web and wipe the oil pan first), then remove both sides, then I tape down the shutter, keeping the shutter in its place during dissassembly and lining it back up in the side gears during reassembly is the key. Make sure you do not misalign the two-sided drive shaft for the shutter.

So, If you are gonna start working on these, carry the following:
Upper Fixing Roller
Upper Fixing Roller 52T Drive Gear
Main Thermistor
Sub Thermistor
(Or just carry the entire assembly)
Lower Fixing Roller
Lower Fixing Roller Bearings

[Oze]

Also locktite the lower bearings...they have a habit of popping the C-rings and chewing out the shaft.

[simohayha]

UPDATE: one unit of 5570 just arrived and i try to disassemble it right away. got to the fixing unit take it apart and try reassembling it....seems to work out ok thanks to all of the advice i got here.
i have a few question though:
1)like what sir Oze pointed out, i noticed that the lower bearings are similar to 7200/8500 and those have a tendency to chew on the lower roller shaft.will this also happens on 5570?
2)the drive gear:is this the gear that are on both side of the upper roller assy and the ones that have to be lock in position by the provided pin? and what is the purpose of locking down those gear? for gear alignment maybe? will it break/crack often? like the 52T?

@canonHPtech:can u give me the approximate price on those parts you listed? is there any compatibles available or only original parts.
thanks alot

[jonhs237]

The bearings will eat into the shaft of the lower fixing roller just like the ir8500. You can try to extend there life by bonding them to the shaft of the lower fixing roller with glue or by scoring the shaft with pliers and pressing the bearing on using the old bearing as a pounding block and hammering on the new one with it. I would then follow-up with silicon oil on the bearings at any calls inbetween. This will make them last the longest. The gears you mentioned are locked to the shield and that is why they have to be kept in alignment. The shield will not go back in properly if one of the gears gets out of alignment to the other. It will still take a bit of wiggeling to get it to go back in even with everything lined up.

[CanonHPTech]

Sorry simohayha, I do not have a handle on prices on these parts, because I do not order them. I do know, that even if you put every one of these parts in to Fixing Assy., it is still much cheaper than ordering the whole Fixing Assy., even if its refurbed.

[cvijr]

1) Yes the shaft will chew up, thats why it was suggested to locktite them.

2) The pock pins-rings are so that the gears dont spin on the roller. The key of the gear is real thin due to the heater being so close the the roller.

cvijr