Why don't these old gestetner CP drums fit my Nashuatec

[Guest]

Some numbers:

My machine is a Nashuatec CopyPrinter CP327

And the Gestetner drum storage box says: CopyPrinter CPDRT3

Some pics:
On the left gestetner on the right nashuatec




Thanks in advance!

[fshead]

Re: Why don't these old gestetner CP drums fit my Nashuatec

no big secret that ricoh,savin,gestener all tweaked connectors or pins to keep other brands from being used on their brand.
Unless you can pinpoint what that is you are out of luck.
I d start with the harness and take centered pics of each rear and compare.

[slimslob]

Re: Why don't these old gestetner CP drums fit my Nashuatec

Might try giving us individual pictures of the back end of each drum taken straight on, not a picture of both where one is straight on with the other off to the side.

Have you tried looking through the parts catalog to see if there any number differences for the same part?

Finally, why did you put this in the copier technical forum instead of the Digital Duplicators?

[W. Kugelblitz]

Re: Why don't these old gestetner CP drums fit my Nashuatec

Might try giving us individual pictures of the back end of each drum taken straight on, not a picture of both where one is straight on with the other off to the side.

Have you tried looking through the parts catalog to see if there any number differences for the same part?

Finally, why did you put this in the copier technical forum instead of the Digital Duplicators?

You are right, should have posted in the digital duplicators forum, i saw Ricoh, Gestetner and looked no further
If a moderater would be so kind to move the topic that would be great

here's some decent pics
a big side by side left one fits, right one doesn't:


and an animated overlap that switches every two secconds:


Where could i find a parts catalog? Internet searches about these part numbers don't get me very far....

[fshead]

Re: Why don't these old gestetner CP drums fit my Nashuatec

looks like that bottom lever is smaller on one of them.
the one wth the Philips screw.
I would try swapping the lever.
IF the smaller one works and you get it to work on the other unit you can alway use a grinder to reduce it down afterwards.

[slimslob]

Re: Why don't these old gestetner CP drums fit my Nashuatec

Is the problem that the Gestetner drum will not lock in or that the machine will not function with it in?

Looking at the latest photos, the obvious difference is the number of contacts on the connector. My guess is that the Geststner drum is a color drum and the Nashuatec does not have the color option.

As for manuals, I found a link to service-manuals.net by searching Nashuatec CP327.

[FrohnB]

Re: Why don't these old gestetner CP drums fit my Nashuatec

Pins in blue connector/ different holes around outer ring/ different size metal tabs on lower left side.

Have you looked at the Front of the drums?? I know on a few models (different than these), the stuff on the back is usually good, but sometimes on the front, is an extra post/tab/hole/ cut-out that can make all the difference.

[mo0651]

Re: Why don't these old gestetner CP drums fit my Nashuatec

The teeth on the Gestener appear thicker than the other drum. The teeth you can see near the center to the right of the center bracket.

[W. Kugelblitz]

Re: Why don't these old gestetner CP drums fit my Nashuatec

looks like that bottom lever is smaller on one of them.
the one wth the Philips screw.
I would try swapping the lever.

Is the problem that the Gestetner drum will not lock in or that the machine will not function with it in?

It won't lock in.

Looking at the latest photos, the obvious difference is the number of contacts on the connector. My guess is that the Geststner drum is a color drum and the Nashuatec does not have the color option.

Pins in blue connector/ different holes around outer ring/ different size metal tabs on lower left side.

Have you looked at the Front of the drums?? I know on a few models (different than these), the stuff on the back is usually good, but sometimes on the front, is an extra post/tab/hole/ cut-out that can make all the difference.

Those holes on the outer ring, i actually haven't propperly investigated, and i will also have an extra good look at the front (as far as i can see though, it hits all the right points....)

The teeth on the Gestener appear thicker than the other drum. The teeth you can see near the center to the right of the center bracket.

Thanks for all the answers and thinking along with me!!!

[slimslob]

Re: Why don't these old gestetner CP drums fit my Nashuatec

The teeth on the Gestener appear thicker than the other drum. The teeth you can see near the center to the right of the center bracket.

This could definitely be the problem. If they are thicker, it will prevent insertion full insertion of the drum. There is a similarly flanges gear on the main frame of the machine. The openings on the flanges and the teeth between them must align exactly in order for the drum to be inserted. This is to ensure that both the drum and the main drive are at home position when inserting the drum. I have had to physically home the main drive when customers have trouble inserting the drum.

[slimslob]

Re: Why don't these old gestetner CP drums fit my Nashuatec

looks like that bottom lever is smaller on one of them.
the one wth the Philips screw.
I would try swapping the lever.
IF the smaller one works and you get it to work on the other unit you can alway use a grinder to reduce it down afterwards.

That lever has nothing to do with drum insertion. It opens the master clamp near the waste master unit to allow the tail end of an old master to be removed and also at the master insertion position to allow the new master to be inserted. Neither of those positions is the home position.

[W. Kugelblitz]

Re: Why don't these old gestetner CP drums fit my Nashuatec

This could definitely be the problem. If they are thicker, it will prevent insertion full insertion of the drum. There is a similarly flanges gear on the main frame of the machine. The openings on the flanges and the teeth between them must align exactly in order for the drum to be inserted. This is to ensure that both the drum and the main drive are at home position when inserting the drum. I have had to physically home the main drive when customers have trouble inserting the drum.

Aha! I need some thinner callipers to mesure the thickness of the gear teeth, but there is one visible difference: the homing teeth on the nashuatec are slightly slanted like this:


Number of theeth around the gear is the same though.... i could try to file the teeth down to a similar shape.
Or do i have a chance at finding and refitting the right gear?