sachint_in
Well-known member
hello
what is the life of Trickle Charge Developer in dc 250 machine in normal condition.
what is the life of Trickle Charge Developer in dc 250 machine in normal condition.
Life of Trickle Charge Developer in dc 250
- Thread starter sachint_in
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easiprint
Well-known member
This is not true, as we have a DC250 which has the developer changed by our service tech every few months. Sorry OP, can't help you on your question however as I am unsure of the clicks between changes. Ours usually ends up being changed before the end of it's life anyway.
easiprint
Well-known member
So you are saying the DC250 does not have to have developer changed????? Mine does. And what is this DC 250 Magenta Developer Mix - 675K17990
Unless someone from Xerox clarify the point, it's not sure if the developer it's included or not in the toner bottle....anyway, the developer it's not a CRU (Customer replaceble Unit)
I have many customers with DC240/250/242/252/260 and none of them has had problem with developer (I hardly know if someone has it changed by the tech in a five year lease...), many of them print about 5-10k pages/month.
If your machine has the "developer" changed every month or so, please check the CED and ask your dealer: maybe there's something not working well.
P.S.: in medium production machines like DC5000AP the developer has to be changed every 300.000 pages.
I have many customers with DC240/250/242/252/260 and none of them has had problem with developer (I hardly know if someone has it changed by the tech in a five year lease...), many of them print about 5-10k pages/month.
If your machine has the "developer" changed every month or so, please check the CED and ask your dealer: maybe there's something not working well.
P.S.: in medium production machines like DC5000AP the developer has to be changed every 300.000 pages.
easiprint
Well-known member
When I said every few months, in reality it is probably 5-6 months (time flies when you are busy!). Also, it is not all the developers. I don't think the yellow or cyan have been replaced in my dc250 whilst I have had it, but I know the magenta and black have been donw twice in the last couple of years. Always due to print quality issues that nothing else would resolve. I don't mind when it is replaced as I am on a service contract.
Developer IS included in toner. 100%. Read the following:
Trickle Development for Black and Color Images
The trickle development system is based on the principle that the life of the developer material is extended by continuously adding a small amount of fresh developer material to the developer system. A constant amount of developer material is maintained in the developer assembles at all times. The control logic continuously monitors the toner concentration. When the concentration drops below the control point (monitored by the ATC Sensor in each housing), control logic sends on-signals to the cartridge motors. The motors energize and rotate to add more toner (with a proportionate amount of new developer material) to the system. The cartridges dispense toner and developer material to the developer assemblies.
NOTE: The ATC Sensor monitors the magnetic permeability of the toner developer mixture to determine the density. As toner is added to the developer the magnetic permeability of the mixture decreases. When the magnetic permeability increases to a specified level, more toner is added. This is the process used to control toner concentration.
One of the augers in the Developer housing removes a small amout of developer material into the waste removal system. The developer is moved throught the system by augers to the waste toner bottle.
This operation results in a constant supply of new developer. Since the developer material is constantly being replenished, the change interval for the developer is greatly extended.
The main advantages of the trickle system are improved print quality, cleaner running xerographic systems and reduced maintenance.
Trickle Development for Black and Color Images
The trickle development system is based on the principle that the life of the developer material is extended by continuously adding a small amount of fresh developer material to the developer system. A constant amount of developer material is maintained in the developer assembles at all times. The control logic continuously monitors the toner concentration. When the concentration drops below the control point (monitored by the ATC Sensor in each housing), control logic sends on-signals to the cartridge motors. The motors energize and rotate to add more toner (with a proportionate amount of new developer material) to the system. The cartridges dispense toner and developer material to the developer assemblies.
NOTE: The ATC Sensor monitors the magnetic permeability of the toner developer mixture to determine the density. As toner is added to the developer the magnetic permeability of the mixture decreases. When the magnetic permeability increases to a specified level, more toner is added. This is the process used to control toner concentration.
One of the augers in the Developer housing removes a small amout of developer material into the waste removal system. The developer is moved throught the system by augers to the waste toner bottle.
This operation results in a constant supply of new developer. Since the developer material is constantly being replenished, the change interval for the developer is greatly extended.
The main advantages of the trickle system are improved print quality, cleaner running xerographic systems and reduced maintenance.
Kalindd's post is entirely correct and covers how trickle charge works. Yes, to both questions: there is a developer assembly for each color and it does occasionally need replacing depending on your usage. And yes, there is developer in the toner, the trickle part of trickle charge, to continuously top-off the developer assembly. The small amount of developer that gets sent to the waste container may or may not be old developer, there is no way for the little auger that dumps it to differentiate, but a constant fresh supply is still very helpful.
To answer the original question, the developer material and assemblies are both "technically" rated for 1.5 MILLION prints. Of course YMMV due to your environment and printing patterns.
Incidentally, I have two of this model, and I have found them to be shockingly long-lived. Both of my machines have over 1.5mil on the meter (about 2/3 color 1/3 black on both machines) and of the C, M and Y developers, NONE have been replaced yet. (Neither the material nor the assembly itself.) The K on one machine is also original, but the K on another machine needed replacing. (Just the material, assembly was fine.)
And when with them being that old, I still get beautiful clean smooth screens. It must be my operating environment I figure. San Francisco gots the good weather! Not too dry, not too humid, and never hot so no need for a moisture-sucking A/C to be running. (Xerographics do like a certain degree of humidity for the process to work best. Just not too much.)
FYI for nerds like me who care... A fresh supply of developer is about 420g in each color. The developer to toner ratio in the DEVELOPER mix is about 90% carrier, 10% toner. The ratio in the TONER is about the opposite, 90% toner, 10% carrier. Both are approximates.
To answer the original question, the developer material and assemblies are both "technically" rated for 1.5 MILLION prints. Of course YMMV due to your environment and printing patterns.
Incidentally, I have two of this model, and I have found them to be shockingly long-lived. Both of my machines have over 1.5mil on the meter (about 2/3 color 1/3 black on both machines) and of the C, M and Y developers, NONE have been replaced yet. (Neither the material nor the assembly itself.) The K on one machine is also original, but the K on another machine needed replacing. (Just the material, assembly was fine.)
And when with them being that old, I still get beautiful clean smooth screens. It must be my operating environment I figure. San Francisco gots the good weather! Not too dry, not too humid, and never hot so no need for a moisture-sucking A/C to be running. (Xerographics do like a certain degree of humidity for the process to work best. Just not too much.)
FYI for nerds like me who care... A fresh supply of developer is about 420g in each color. The developer to toner ratio in the DEVELOPER mix is about 90% carrier, 10% toner. The ratio in the TONER is about the opposite, 90% toner, 10% carrier. Both are approximates.
sachint_in
Well-known member
i know all the things...
i replaced New IBT Belt, all 4 drum Units... but print is not smooth as before...
35% light cyan print come like Clouds in the sky... on the paper
click only 200k in 6 months... 3 Toner set Per month
may be 1st BTR Roller have problem, its a CRU ?
May Be ROS..
i replaced New IBT Belt, all 4 drum Units... but print is not smooth as before...
35% light cyan print come like Clouds in the sky... on the paper
click only 200k in 6 months... 3 Toner set Per month
may be 1st BTR Roller have problem, its a CRU ?
May Be ROS..
Post scan.
What kind of paper you use?
Clouds? May be it is mottle?
Post a scan, I forgot my crystal ball back home.
sachint_in
Well-known member
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