QM46 Dampening Adjustment issue

[dagoof]

That's quite possible RGPW - it'd had a complete roller replacement (by an indy dealer) before I bought it, so who knows if they got it right. I also had the form roller on PU1 replaced but this was a used roller from another machine (all we could get a short notice), so that's another anomaly.

One of the main problems I'm having is the water pan roller on PU1 is constantly getting stripped of ink - obviously this results in too much water and eventually emulsification. Anything I can try to remedy that?

[GuruMorgor]

when adjusting the dampening rollers, did you set the metering spindle to 6? My manual is different from yours as I don't seem to have a section 4.4, or page numbers

[dagoof]

Yes, to #6 guru.

[Alois Senefelder]

Hello dagoof,


Why should the - Water Pan Roller be covered in Ink ?



Regards, Alois

[RGPW17100]

All water rollers in a quick master carry ink. It is similar to a crestline but built a lot better.

If your rollers are stripping are you running metal or poly plates? How old is the rubber in the water system? Not just the form but the other rollers as well. Ever do a calcium rinse? If you dont have a calcium rinse you can make a cheap one with about 20 percent white vinegar and 80 percent water. When you are done washing your press follow up with water or fountain solution to help remove press wash residue.



Regards, Alois[/QUOTE]

[dagoof]

Thanks RGPW - the rubber is about 4 years old. I know it eventually breaks down but it's done less than 1 million impressions and still looks good, no glaze etc. I haven't done a calcium rinse - the water where we are is very soft and clean so doesn't really cause many of the problems you see in other countries, but I will try that none the less.

It's Presstek poly plates I'm running btw.

[RGPW17100]

calcium is from the paper not the water. Longer runs of uncoated stock tend to cause more problems then coated. I am guessing four years is about as much as you can ask for. My rollers were 5 years when I replaced them and one ink roller would not even stripe. If all your stripes are good and you have good seals ( I think that is what they are called. The removable ones on each side of the water form roller) I would think about getting new rubber. Try the calcium rinse first and see if that helps.

If you buy that roller off the shelf you may have to get the outer shell and rebuild the core with the roller you have. It is a pain. If you need a syntax roller number for that water roller let me know and I will look at the box and post it when I get a chance

[dagoof]

I really think the rollers are ok for now (had glazed & fatigued rollers on my old Ryobi, so know what they look like!), however, am still going to to a vinegar wash as suggested (will see how that water pan roller pans out, if you'll pardon the pun). Put a new blanket on and that's helped too. It's all coated stock btw.