What happens to the developer?

[BillyCarpenter]

Re: What happens to the developer?

This thread was an interesting read...even if it was from 2018.

[allan]

Re: What happens to the developer?

Yea and i am the guilty one reusing the developer....

[allan]

Re: What happens to the developer?

Can't help it i have to spill.

Developer does get #u&ed in more than one way. The sharp corners for the grains gets warn down and your nice and puffy mag brush is not the same anymore and these rounded grains have a way of breaking free from the magnetic field. Toner gets impacted onto the grains also making it less attracted to the magnetic field, it gets heavier and the extra weight is not magnetic. With the impacted toner machines using toner to carrier ratio sensors will count the toner stuck to the developer as part of the toner concentration and will read a higher TCR value leading to less toner supplied and resulting in light prints. Eventually a lot of the developer would have escaped from the tank and some machines have a minimum value of toner it will add counted by hopper rotations. If there is still enough developer in the tank to cover the mag roller the set amount of toner added will be too much overshooting the TCR target leading to over-toning. Then there is paper dust, its got a way of getting into the dev tank and then just accumulates in there. The paper dust is added to the toner side of the ratio and leads to the machine not adding enough toner.

You can setup a bench tool to read TCR value of a dev toner mix if you really want to.
Its amazing to see that most of the developer used by the OEM's are the same stuff regardless if its color or not.

[Phil B.]

Re: What happens to the developer?

I hope you've solved your problem! I also sell printers. I have been in this business for several years and a colleague of mine advised me to start selling second hand printers. I have always sold only new printers but now during the crisis, my sales have declined and it seems to me that new customers are not ready to spend a lot of money on new printers now. In addition, I want to develop my own website and maybe even an app so that every new customer can find my products and services online. I would like to know the software engineer hourly rate? Perhaps you can help me with your advice? Thank you in advance!

your comment does not pertain to this thread... please post it here ---> https://www.copytechnet.com/forums/business-talk/

[tsbservice]

Re: What happens to the developer?

Can't help it i have to spill.

Developer does get #u&ed in more than one way. The sharp corners for the grains gets warn down and your nice and puffy mag brush is not the same anymore and these rounded grains have a way of breaking free from the magnetic field. Toner gets impacted onto the grains also making it less attracted to the magnetic field, it gets heavier and the extra weight is not magnetic. With the impacted toner machines using toner to carrier ratio sensors will count the toner stuck to the developer as part of the toner concentration and will read a higher TCR value leading to less toner supplied and resulting in light prints. Eventually a lot of the developer would have escaped from the tank and some machines have a minimum value of toner it will add counted by hopper rotations. If there is still enough developer in the tank to cover the mag roller the set amount of toner added will be too much overshooting the TCR target leading to over-toning. Then there is paper dust, its got a way of getting into the dev tank and then just accumulates in there. The paper dust is added to the toner side of the ratio and leads to the machine not adding enough toner.

You can setup a bench tool to read TCR value of a dev toner mix if you really want to.
Its amazing to see that most of the developer used by the OEM's are the same stuff regardless if its color or not.

I'm very glad we have here many actually thinking engineers not only toner jockeys/masters of screwdriver. Sometimes I feel so lone where I am 😅

[apostlegato]

Re: What happens to the developer?

The % is life remaining not level remaining. Developer isn't consumed it just wears. However if there is arcing, as was common in older machines, it would suck the developer out into the machine and create usually worse arcing and eventually error code for TLD, ATDC, L-Detect(Toner Level). I actually used to save some developer to repair a machine in a pinch. Fix the arcing issue first of course, Then add a little of the used developer at a time until the error went away or L-detect was successful, then hope it would hold up until I could return with a new developer. But with current models I wouldnt save developer. However I have saved the waste toner on monochrome machines. Ive actually poured the waste toner back into the toner bottle on a couple occasions. Way back in the day, when Konica originally had waste toner bottles and the toner bottle poured into the hopper, our service manager had us dumping waste toner into the toner hopper on every service call. Which from the model 7033 2000-ish, until the 4 series most if not all the monochrome Konica actually did this anyway.

[allan]

Re: What happens to the developer?

I have saved the waste toner on monochrome machines. Ive actually poured the waste toner back into the toner bottle on a couple occasions.I have saved the waste toner on monochrome machines. Ive actually poured the waste toner back into the toner bottle on a couple occasions.

What a waste... Yea been doing it. Pity the waste from 754 will not be good for a 423.
Had to do it for my 951 machines due to shortages and no ill effect. Sure its not the best to keep your developer crisp.