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It's just the way the sleeve roller works on the Dev unit that's my guess it's like pulsing AC to create a cloud of toner then pulling it back so you get waves / wear on the drum is my guess. 25/30 ppm machines don't have a sleeve roller and they never get that problem but I have noticed older the machine the worse it gets. If image quality is crucial stick to 25/30 speed machines the new 50/60/70 machines are fine btw again no sleeve rollers. 51 52 53 series machines all have this problem.
Can ruin your day as some people once they notice it will constantly bring it up and you have to explain sorry this machine always does it 😔.
It's just the way the sleeve roller works on the Dev unit that's my guess it's like pulsing AC to create a cloud of toner then pulling it back so you get waves / wear on the drum is my guess. 25/30 ppm machines don't have a sleeve roller and they never get that problem but I have noticed older the machine the worse it gets. If image quality is crucial stick to 25/30 speed machines the new 50/60/70 machines are fine btw again no sleeve rollers. 51 52 53 series machines all have this problem.
Can ruin your day as some people once they notice it will constantly bring it up and you have to explain sorry this machine always does it 😔.
So the ones with no sleeve roller, what do they have instead?
First, all Kyocera '4' series machines NO LONGER HAVE A SLEEVE ROLLER.
Probably because that arrangement so often caused this issue.
I would think that it relates to the fact that the (mono-component) sleeve roller is much closer to the drum and the tiny jump the toner makes is more effected by 'roller jitter' than the big space from Dev to Drum in the dual component.
Big difference in the mechanics of toner application in these 2 systems.
However, they both still use the AC sine wave 'push-pull' with the '0v' line (DC slice as Canon called it) moving up or down to give 'push' or 'pull' a greater advantage.
"Being ignorant is not so much a shame, as being unwilling to learn" - Benjamin Franklin
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