Gears in the devlopment unit

[danielhaze]

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

Image 011.png

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.

[Phil B.]

Re: Gears in the devlopment unit

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

[ATTACH=CONFIG]40249[/ATTACH]

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 connected to anything else.

Thanks.

well clearly they run the dev auger shafts. they move toner/dev from one side to the other side to the mag roller. LOOK at the drive from the base unit for the meshing gears.

[fshead]

Re: Gears in the devlopment unit

maybe put model,i have no idea which dev unit this is .
Maybe the extra gear turns a drum

[slimslob]

Re: Gears in the devlopment unit

maybe put model,i have no idea which dev unit this is .
Maybe the extra gear turns a drum

It is either an older 35/45 or a 400X/500X. Same paddle shaft assembly used from the get go.

[blackcat4866]

Re: Gears in the devlopment unit

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. =^..^=

[danielhaze]

Re: Gears in the devlopment unit

It is either an older 35/45 or a 400X/500X. Same paddle shaft assembly used from the get go.

Yes. It is the is the MP 4500

[danielhaze]

Re: Gears in the devlopment unit

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. =^..^=

I think in this model the tonner and the developer keep been agitated even without the presence of these gears becouse the drive for the paddel and the magnetic roller comes from the other side
.
Image 014.jpg
the gears I am asking about are inside the plastic cover indicated with the red arrow.

[blackcat4866]

Re: Gears in the devlopment unit

Well they're not just EXTRA gears. They probably transfer drive from one auger to the other. So one of your augers is rotated from the rear, and a gear set brings drive to the other auger through the front.

Is this just idle curiosity or are do you have some sort of symptom that you're trying to fix?

The theory stays the same, but with 1/2 of the augers rotating. =^..^=

[slimslob]

Re: Gears in the devlopment unit

I think in this model the tonner and the developer keep been agitated even without the presence of these gears becouse the drive for the paddel and the magnetic roller comes from the other side
.
[ATTACH=CONFIG]40253[/ATTACH]
the gears I am asking about are inside the plastic cover indicated with the red arrow.

We're fully aware as to where those gears are located. One gear is attached directly to the paddle roller and receives drive from it. It in turn drive the double stack reduction gear which in turn drives the screw shaft inside the paddle. The ribs on the paddle roller moves toner/developer from the back to the front while the screw shaft on the inside side moves it toward the rear. The holes in the paddle roller allow toner/developer to through. If you want a complete description of the process, read the detailed description section developer mixing in an older Service Manual such as the A232, Aficio 450 or B004, Aficio 1045. (danielhaze attachment could have come from one of those manuals)

[slimslob]

Re: Gears in the devlopment unit

Well they're not just EXTRA gears. They probably transfer drive from one auger to the other. So one of your augers is rotated from the rear, and a gear set brings drive to the other auger through the front.

Is this just idle curiosity or are do you have some sort of symptom that you're trying to fix?

The theory stays the same, but with 1/2 of the augers rotating. =^..^=

It can't curiosity unless he is too fing lazy read. All the images he has posted can be found, copied and pasted from, the Detailed Description section on developer mixing in service manuals for the Aficio 450 and 1450, possibly others. He had better read and memorize the forum rules or expect to collect even more red cards.

[Phil B.]

Re: Gears in the devlopment unit

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]

Re: Gears in the devlopment unit

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]

Re: Gears in the devlopment unit

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

[ATTACH=CONFIG]40249[/ATTACH]

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]

Re: Gears in the devlopment unit

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]

Re: Gears in the devlopment unit

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?