[CQ] Oce pw365 intermittent 3" void cross feed

[brianSTX]

Oce pw365 with 21k linear meters, exhibiting intermittent 3"(76mm) void cross feed, otherwise CQ is excellent.
recently replaced charge assy. and developer.

Oce image void.jpgany ideas would be appreciated
Brian

[blackcat4866]

Re: Oce pw365 intermittent 3" void cross feed

Is the developer unit agitating? I would suspect loss of developing drive.

Since the image is still correctly aligned, the drum must have continued to turn. And charge loss would present as black images.
=^..^=

[brianSTX]

Re: Oce pw365 intermittent 3" void cross feed

Is the developer unit agitating? I would suspect loss of developing drive.

Since the image is still correctly aligned, the drum must have continued to turn. And charge loss would present as black images.
=^..^=

Good point BC. problem is very intermittent (once in 50 D prints), and the blank area is ~ 76mm (circumference of the dv roller) any thoughts on possible cause of intermittent loss of dv drive?
Thanks for your help,
Brian

[allan]

Re: Oce pw365 intermittent 3" void cross feed

Just double checking. You feed direction is from top to bottom as per you photo?
Does not make sense that it will loose drive for only a single rotation.

Can for sure be the dev drive.
Also look at transfer and dev bias contacts.
Don't think it could be the print head, there seems to be a bit of an image in the void but possible.

What a pain to recreate. Ever 50 pages on that is not something you can wait for or do on site.
A bit blind.

[blackcat4866]

Re: Oce pw365 intermittent 3" void cross feed

Sorry, I haven't the faintest idea what this Oce' looks like. My thoughts are based on laser print engine theory. =^..^=

[brianSTX]

Re: Oce pw365 intermittent 3" void cross feed

Just double checking. You feed direction is from top to bottom as per you photo?
Does not make sense that it will loose drive for only a single rotation.

Can for sure be the dev drive.
Also look at transfer and dev bias contacts.
Don't think it could be the print head, there seems to be a bit of an image in the void but possible.

What a pain to recreate. Ever 50 pages on that is not something you can wait for or do on site.
A bit blind.

Yes, the void is across the image. And yes kind of tough to replicate / observe, i was problem is very intermittent (once in 50 D prints), and the blank area is ~ 76mm (circumference of the dv roller) any thoughts on possible cause of intermittent loss of dv drive?
Thanks for your hoping someone has seen a similar issue in a Plot Wave.
thanks for your help.

[brianSTX]

Re: Oce pw365 intermittent 3" void cross feed

Sorry, I haven't the faintest idea what this Oce' looks like. My thoughts are based on laser print engine theory. =^..^=

It's an awesome beast, but just an overgrown laser printer, thanks for your input, it was helpful.
pw 3000 IMG_3865.jpg

[allan]

Re: Oce pw365 intermittent 3" void cross feed

Sorry, I haven't the faintest idea what this Oce' looks like. My thoughts are based on laser print engine theory. =^..^=

Yea standard laser printer theory applies here.


Did the problem start after the part replacement?

[brianSTX]

Re: Oce pw365 intermittent 3" void cross feed

Yea standard laser printer theory applies here.


Did the problem start after the part replacement?

Developer change and charge assembly where recently (1 month) changed. I don't think they're related, but ...
I've retraced those steps. I don't see any defects.

[brianSTX]

Re: Oce pw365 intermittent 3" void cross feed

I am attaching another sample of the image void, which shows carrier/developer transfer on the lead edge of the 3" void, and over toning on the trail edge of the void, not visible on the first sample picture.
Oce image void 2 (2).jpg
since my last post I have replaced transfer and separation wires, and have not been able to reproduce the fault.
Any input on the possible cause is welcome,
Brian

[Phil B.]

Re: Oce pw365 intermittent 3" void cross feed

Yes, the void is across the image. And yes kind of tough to replicate / observe, i was problem is very intermittent (once in 50 D prints), and the blank area is ~ 76mm (circumference of the dv roller) any thoughts on possible cause of intermittent loss of dv drive?
Thanks for your hoping someone has seen a similar issue in a Plot Wave.
thanks for your help.

I've had ricohs where the bushing in the PCU got to be wobbly.. kinda the same CQ issue you are having

[slimslob]

Re: Oce pw365 intermittent 3" void cross feed

I am attaching another sample of the image void, which shows carrier/developer transfer on the lead edge of the 3" void, and over toning on the trail edge of the void, not visible on the first sample picture.
[ATTACH=CONFIG]47300[/ATTACH]
since my last post I have replaced transfer and separation wires, and have not been able to reproduce the fault.
Any input on the possible cause is welcome,
Brian

Not knowing that particular machine all I can say is it looks very much like a transfer void, i.e. momentary loss of transfer current. I have also seen it from a bad drum ground.