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EarthKmTech
02-20-2021, 02:32 AM
https://youtu.be/Dhe7ic2k6K0

brand new machine out of the box.

Can save a lot of time by simply slipping the belt off and spinning the coupling in both directions by hand. If the noise is there you got your answer.

qbert69
02-20-2021, 02:44 AM
https://youtu.be/Dhe7ic2k6K0

brand new machine out of the box.

Can save a lot of time by simply slipping the belt off and spinning the coupling in both directions by hand. If the noise is there you got your answer.Just posted a question on the vid.[emoji41][emoji1303]

Sent from my SM-N950U1 using Tapatalk

copytechman
02-22-2021, 03:11 PM
https://youtu.be/Dhe7ic2k6K0

brand new machine out of the box.

Can save a lot of time by simply slipping the belt off and spinning the coupling in both directions by hand. If the noise is there you got your answer.

Awesome video!
Also watched the 2204 vid, that was interesting (havent seen that error yet but still!)

Regards!
A.

occus
02-26-2021, 02:52 PM
https://youtu.be/Dhe7ic2k6K0

brand new machine out of the box.

Can save a lot of time by simply slipping the belt off and spinning the coupling in both directions by hand. If the noise is there you got your answer.



@EarthKmTech

Do you have a solution?
I have replaced the drive gear assembly but the ticking sound is still there... now a bit louder whit the new one http://www.copytechnet.com/forums/images/icons/icon13.png

Maybe the spareparts cannot be used?

occus
02-26-2021, 04:39 PM
Ok, its done...
Do not replace with a new drive gear. In my case i made a modification.
If you make it for the first time calculate with 60min its really tight. And after i think you need about 35min maybe less with a bit practice.

1. take out fuser
2. take away upper and lower backcover
3. take out your drive gear, 4 cable-connections, 1 fan
4. put in washers to the movable gear to bridge the gap total 2.5mm with washers 6mm inside diameter, put in your drive gear
5. important! reseat the transferbelt again, or remove it at the beginning. (you get an error code, gap between gears)
6. enjoy the silents http://www.copytechnet.com/forums/images/icons/icon14.png

48447

Now i'm off work and on the weekend... a longer test run will be done next week.

tsbservice
02-26-2021, 06:32 PM
Ok, its done...
Do not replace with a new drive gear. In my case i made a modification.
If you make it for the first time calculate with 60min its really tight. And after i think you need about 35min maybe less with a bit practice.

1. take out fuser
2. take away upper and lower backcover
1. take out your drive gear, 4 cable-connections, 1 fan
2. put in washers to the movable gear to bridge the gap total 2.5mm with washers 6mm inside diameter
3. put in your drive gear
4. important! reseat the transferbelt again, or remove it at the beginning. (you get an error code, gap between gears)
5. enjoy the silents http://www.copytechnet.com/forums/images/icons/icon14.png

48447

Now i'm off work and on the weekend... a longer test run will be done next week.

I will be very interested how your mode is performing after few thousand prints. Please keep us informed.

blackcat4866
02-26-2021, 11:21 PM
So it's probably clicking at the helical gear face. That looks very similar to the 454e, 554e fuser drive packs, sans the clutches.
=^..^=

Bix
03-01-2021, 10:46 AM
Ok, its done...
Do not replace with a new drive gear. In my case i made a modification.
If you make it for the first time calculate with 60min its really tight. And after i think you need about 35min maybe less with a bit practice.

1. take out fuser
2. take away upper and lower backcover
3. take out your drive gear, 4 cable-connections, 1 fan
4. put in washers to the movable gear to bridge the gap total 2.5mm with washers 6mm inside diameter, put in your drive gear
5. important! reseat the transferbelt again, or remove it at the beginning. (you get an error code, gap between gears)
6. enjoy the silents http://www.copytechnet.com/forums/images/icons/icon14.png

48447

Now i'm off work and on the weekend... a longer test run will be done next week.
Are you sure it's okay in the long run? That detachment appears to be intended to allow the fuser roller hook to be flexible without creating damage. It could wear out the plastic quickly and create new squeaks in the future

occus
03-01-2021, 03:09 PM
After a test of 3'000 papers in testmode the drive gear is still silent.

If you look at the detail metall motor gear and spaced plastik gear, this picture is before i put in the washers

48471

and after
48472

I had time today to play around.
On the original drive gear it works perfekt 100% silence. On the drive gear that i have ordered you can hear the ticking noise sometime but ony if you now there is a ticking noise so 95% silence.

@Bix
What do you mean with " to allow the fuser roller hook to be flexible without creating damage". I can't see any relation to the fuser roller?

Now i haven't time any more for this...

Open question:
- Why i got a new drive gear with the same problem? I guess this was delivered from stock with older production date. The older manufactured c250i does not have this ticking noise so it's not logical.
- will this mod persists more than 100'000 sheets
- maybe if you add spacer under the 4 screws on the motor plate you have the same effect and without removing the drive gear, it will be mucht faster.

Bix
03-01-2021, 03:27 PM
1. Mine is just a hypothesis about the reason for that space. I am talking about the component indicated by the arrow.

48473

To facilitate insertion of the fuser unit, it retracts inward. From what I have seen, the motor starts all those gears.

2. The problem also occurs in the second piece because perhaps the problem comes from somewhere else. Don't get me wrong. The problem is definitely in that area but maybe other part of the c250i pushes that gear incorrectly, always causing the noise.

For example, I have discovered that I have a defective paper exit unit. After replacing the fuser, the squeaking problem disappeared for a month. But strangely it's back. I took apart the paper exit unit and discovered that an internal plastic part was broken. So why had replacing the fuser solved my problem for a while? These are the mysteries of the machines.

occus
03-01-2021, 03:39 PM
The space that i have fixed is not in relation with any other gear then the metal motor gear so i can't imaging, there is no reason not to try this modification.
Last friday i found out if you press the movable gear on the machine side the noise disappears immediately, thats why i fix the gear.

I guess the helical teeths runs not synchron, because the angles of the shafts are not perfect. Any change can make more or less tollerance.

tsbservice
09-29-2022, 02:34 PM
Hi occus, how your fix holds after some time? Do you have other machines like that?

occus
09-30-2022, 12:05 PM
Hi, it was the only one.
And yes the fix holds until today. The gear can't slip left/right on the axis anymore.

Markks
10-01-2022, 03:37 AM
https://youtu.be/Dhe7ic2k6K0

brand new machine out of the box.

Can save a lot of time by simply slipping the belt off and spinning the coupling in both directions by hand. If the noise is there you got your answer.


Youtube link not working

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