Gears in the devlopment unit

[Phil B.]

here again..what I see is someone WITH the docs... but either: REFUSES to read said docs and comprehend and relies on seasoned techs to clue him into the PROCESS ( like stated before... in the manual ) -= OR =- is a END USER in possession of the docs and can't make heads nor tails of them.

[sandmanmac]

here again..what I see is someone WITH the docs... but either: REFUSES to read said docs and comprehend and relies on seasoned techs to clue him into the PROCESS ( like stated before... in the manual ) -= OR =- is a END USER in possession of the docs and can't make heads nor tails of them.

OR......He's just had these gears in his dev unit seize up due to Developer Seepage, and rather than replace the unit and/or gears, he's trying to convince himself that the gear assembly is redundant.
Good Luck with that, Champ!

[nmfaxman]

Hi, what the gears in the image do in the development unit?.

Attachment 40249

What is their function, I do no understand what they do assuming that the drive comes from the other side of the unit and these gears are not conected to anything else.

Thanks.

Take them out and run the machine. That will show you what they do, or don't do.

[slimslob]

OR......He's just had these gears in his dev unit seize up due to Developer Seepage, and rather than replace the unit and/or gears, he's trying to convince himself that the gear assembly is redundant.
Good Luck with that, Champ!

It's usually the conductive bearing at the rear that seize up. There was a thread a couple o years ago that gave the part # for the bearing and a link to a video on how to remove it.

[slimslob]

Take them out and run the machine. That will show you what they do, or don't do.

Faxman, I haven't seen you post for a while. How have things been going for you?

[sandmanmac]

It's usually the conductive bearing at the rear that seize up. There was a thread a couple o years ago that gave the part # for the bearing and a link to a video on how to remove it.

Agreed, but I've personally seen both.
In fact, I had one with the gears chewed up just a couple of weeks ago.

[fshead]

On a more elemental level, the developer is agitated to produce the tribo-electric effect, which is essentially static electricity, which attracts the toner particles spherically around each particle of ferrite.

Without agitation there is no tribo-electric effect. The toner does not statically cling to the ferrite particles and just sits in the bottom of the developing unit. The toner sensor identifies low toner density and dumps loads of toner into the developing unit. If this continues for any length of time the developing unit will fill until toner is bursting from the seams of the unit, or the machine indicates low toner, or both. =^..^=

"tribo-electric"
i have not heard that phrase in 25 years maybe more ...
Makes me think back on old analog b/w sharp or minolta copiers where you
would adjust the dev unit after installing new developer using a allen key sensor that
you would turn till both leds would flicker................its come a long way

[blackcat4866]

"tribo-electric"
i have not heard that phrase in 25 years maybe more ...
Makes me think back on old analog b/w sharp or minolta copiers where you
would adjust the dev unit after installing new developer using a allen key sensor that
you would turn till both leds would flicker................its come a long way

You got that right. =^..^=