Xerox workcentre 75xx low speed fuser vs high speed fuser

[Scarecrow]

Phil, Disassembled the heat belt (heat roll), and couldn't find any glass anywhere. Inside the belt are thermistors, wick, wiper, reinforcement, etc, but no glass. Huge copper coil near the belt though. My guess: Induction heating. There is a thin pressure plate that is fairly wide (curved to encompass a large area inside the belt), that probably is the heat "plate", since it is magnetic and the heat belt is not, and therefore the belt will probably not conduct eddy currents. If that is the case, induction heating will heat the inside plate fast because of its low mass, and the plate heats the belt fast because of the belt's low mass. Maybe an "inductive fuser heat engineer" will chime in.

[Caffeine]

Phil, Disassembled the heat belt (heat roll), and couldn't find any glass anywhere. Inside the belt are thermistors, wick, wiper, reinforcement, etc, but no glass. Huge copper coil near the belt though. My guess: Induction heating. There is a thin pressure plate that is fairly wide (curved to encompass a large area inside the belt), that probably is the heat "plate", since it is magnetic and the heat belt is not, and therefore the belt will probably not conduct eddy currents. If that is the case, induction heating will heat the inside plate fast because of its low mass, and the plate heats the belt fast because of the belt's low mass. Maybe an "inductive fuser heat engineer" will chime in.

These fusers are induction. There is no mystery or question about it, it was one of the biggest "marketing points" when these models were released. They have no lamps.

Up to 55ppm, they are self contained complete fusers. The 70ppm model is "half" a fuser with the other half permanently in the machine, because it doesn't wear out. Cost savings measure.

But this entire family, from the WorkCentre 7525 to the current models are induction.

[Scarecrow]

Hey Coffee, is the belt or the plate (or both) the business part?

[Scarecrow]

A quick search mentions that even nonmagnetic metals will get hot , so it may be both.

[savi0r]

For those who are curious, so far, the only difference between them is that logic board. I switched them and all seems good now.