Have 5 COLOR L 28 w coater - Having problems with getting the best from the coater. Set the 3 roller system
to the book specs. But this thing should not have so many problems! Ideas... best packing... best roller settings ... Have Perry dryer-optimal settings?
Run the coater speed @ 33 for gloss and about 40 for satin
with the ratio for both @ 160. Any input would be
appreciated.

bdk, what kind of problems are you having? I run a 528L w coater also. I have one problem but I'm not sure what it is. I think its a shock or gap streak. I tried all sorts of settings (set and ratio) but no difference.
Also set to specs. Here are what I set the coater to: speed 30, gloss and satin. Ratio 180-200. With a 3 ply .67 coater blanket I pack to .47. Perry dryer 1st pass set at 100 degrees. Back up at 90 degrees. Hot air at 450.

Bruce - Thanks for the reply. I run the same blankets
.67. Packed about the same .46. Run the heat at 105 1st pass, 95 2nd, with hot air @ 400. Where is your "shock"
or gap streak located? I sometimes notice something similar about 3/4 of the way back on a 19 x 25 sheet.
Looks like it just ran out of coating. So I turn up the coating roller speed and the coating ends up tailing off the back of the sheet and the loads stick at the tail. (Cutter operater loves me for this) Still doesn't solve the problem.
It's not real noticeable. But I notice and it shouldn't be there. ??

bdk- That sounds about right on the gap(?) streak, 3/4 back of the sheet. When I first started working for this company we had two komori's, a 628 with coater and a 528 with coater. Both presses had the same problem with the streak. We had customers question it and were not very happy.
So we contacted komori about it and they sent a komori tech from Japan to take a look. It was hard to understand him (accent), but he did continue to say -anilox,anilox,anilox...So this lead me to believe its a inherited problem with this press. Oh I forgot to mention that we bought a new 528 with coater and guess what? Same problem. Anyway we have noticed that different coatings from different companies would not show as bad. We get by. Bdk, can you be more specific about the problems your having as posted on you first thread. Komori demonstrator (Paul), Richard K. if you read this can we get your input on this problem?

Bruce... Thanks again for the reply. Our shop has moved from Heidelbergs to Komoris. My L28/5C is about 6 years old, in our place about 5 months. The 6C 40 (Komori) is about 4 years new. It has a Harris and Bruno (sic?) coater. The thing is sweet! Vaccuum chamber, one dimpled roller,
every sheet has the exact same amount of coating on it. The pressmen on it love it. I have never worked on a press with a real coater. (We have run "fakquious" coating, as one of the nite shift pressmen loves to call it... ink train coating.) Anyway I'm finding myself coating way more jobs than I used to, the product is better. The results aren't. Coating 12.5 x 19 sheets with minimal
trim with crop marks that bleed into the color bars is ...
well...a challenge. ( The press was upgraded with a PDC Lite Scanner, so the coating on the bars affects the scan results.) I'm thinking the coating metering roller needs replacing as the adjustment settings are about maxed out.
So my problem is getting sheets with nice even layer of coating without having tailing off the back of the sheets.
So thanks ahead of time for any replys.

Okay, had the same streak again, satin coating on dull stock. It's almost exactly 16 inches from the lead edge of the sheet. The streak looks like it has less coating in that spot, it's not as satin as the rest of the sheet. It is a bump
streak caused ?? from I think the edge of the aplicator roller when it contacts the the coater blanket. So I think that setting needs to be less. Any ideas? But think I'll try that for now.

Satin, matte, dull coating will leave a streak.
Sometimes a better form roller for the coater will help.

You can also try this and it does help.
Since the coating unit is 3 rollers. Take an old ink form roller (The A position one which is the biggest) and put it between the rubber coater form roller and the metal roller. This will help carry more coating.

THIS IS THE IMPORTANT PART.....you will need to put something on the end of the ink form roller bearings to the keep the roller from moving to the side and leak/drop coating outside the pan. You can take a piece of think rubber hose that is the same size as the bearing and have it cut so the ends are to the frame.

good luck.

I to was given that tip to try out by a pressman from the SF bay area. Humm. I never did for fear of it flying out of the unit and causing damage. I'll try it next time I have a job that it might help. Bdk, let me know if you try it. Thanks for reminding me about that tip, SF area pressman.