A Question about developer and my observations

[tmmdmmm]

Re: A Question about developer and my observations

I don't have any of these so can only offer insight based on casual conversations with other techs.

Wasn't there a whole thing about 1) Having to replace the developer and completely flush out the hopper/Dev every time you make a switch from non-H to H or H to non-H
and 2) Need to enable a toner saving mode to use H toner?

Havn't heard any techs here mention IQ issues or lack of volume as long as those are followed, users just needed to make sure to use all of their stock of one before switching back since the Dev and hopper needs to be flushed for the change

[cmitch]

Re: A Question about developer and my observations

Update 1: Developer is now expired. Last bottle of toner in. This is a different brand. Generic. It has already outlasted any of the last 3. I have one bottle of pre fire OEM coming Monday and when I change developer, I'll put it in. No question the 3 bottles I had are garbage toner. The quality of the copy went up tremendously even though developer is expired. I seen a slight tint on the last 1000 copies at operator side of sheet. No question developer is done. I have 3 more bottles of OEM that is definitely post fire coming in from ARC services. Crossing fingers.

[wjurls]

Re: A Question about developer and my observations

Developer on this line typically needs replaced between 750k and 1 Mil. If you have excessively dusty paper (or dust the collectors removed) you may see a lot less. Also, if the developing unit has 5 million or more clicks on it you may want to consider replacing it. I once tried using some generic toner to save a few bucks (yeah I know) for one of my direct mail customers (4 x 1051's) and within a week there was toner everywhere!! What a debacle that was.

[Oystercopy]

Re: A Question about developer and my observations

I'm not sure the original question was answered, but I'm throwing my 2 cents in. Absolutely, when developer gets old, and it has agitated through the unit for many thousands of pages, the magnetic beads of the developer get beat down, become smaller, and typically, the developer becomes more porous. Therefore, the machine has to saturate the developer with more toner to keep the density levels up, and satisfy the toner/developer ratio setting. Over the decades, seemingly on every machine, I typically see higher toner usage (more saturation) on developers that are old.

Plus, as someone else said, if you're getting 95% of the yield out of the DV, you've got your money's worth and I would change it, just on principle, at that point.

Hope this helps.
OC

[cmitch]

Re: A Question about developer and my observations

Developer replaced, new bottle of genuine toner installed. Developer adjustment done for new developer and counter reset. Been running saddle sticth books all morning. All seems to be well. When I get back from vacation, I have to replace upper fuser roll. When lower one went, it took the upper with it but couldn't get one until about two weeks ago. Already had to replace lamps due to broken wire on one.

I replaced developer unit on last developer change so we have 4 million to go on it.

On to toner consumption. I blame it all on the toner. Bottles were literally only half full. No way that was going to get us 50,000+11 x 17 copies. Plus, quality of toner was pretty much suspect. With toner shortages, I felt I've had no choice but to dabble in generics or not print at all. The first 3 bottles of generic toner was fantastic. This was a different company and it was bad. Tried ordering from the original company but they were out. I'm running our Ricoh 7100SX a lot for B&W because I can get comfortable trims out of paper since it has a maximum sheet size of 13 x 19.2 (also 13 x 47 banner). Good for 6 x 9 books with bleeds.

[Tech09]

Re: A Question about developer and my observations

"H" toner is Katun. As long as you're not mixing the two types of toner you should be ok if you're starting with fresh developer, but don't use OEM toner and "H" toner with the same developer. IMO, until the OEM toner is guaranteed to be in stock stick with the "H".

[Ziggy]

Re: A Question about developer and my observations

attaching bulletin about H toner. it also has attachments embedded in it for each model

[ipconfig]

Re: A Question about developer and my observations

Theatrically only good developer can transfer toner. Yes, developer is coated iron filings and it is gritty. Sounds like developer toner concentration is too high. Machine should go 1.1 million between service calls.