Ink Drum, oscillator and rider rollers

Hello everyone. Could someone please tell me what could be causing this uneven spread of ink on the ink drum? Could it be the press leveling? I’m not sure it is 100% level.

I’m also attaching some photos of my refinished oscillator and rider rollers. I think they definitely improved the inking, I didn’t refinish the ink drum because it is a pain in the back to remove it again and I had already removed rust with evaporust. So what do you think?

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Ink Drum, oscillator and rider rollers

18 thoughts on “Ink Drum, oscillator and rider rollers

  • September 6, 2013 at 8:49 am
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    Eric mentioned the squareness of the frame which holds the rollers. It could be that the rollers are hitting at one end, but not the other not due to height of the rollers, but lateral position. You might be able to check the distance from the roller shaft to some fixed point at each end and see if that might be an issue. If the frame or the roller carriage has been slightly twisted or racked, that could easily push one end of the roller
    away from contact.

    If the above is out of position, you still could level the rollers when away from the drum, but their contact with it would be effected.

    Just one more thing to check to get you back to printing.

  • September 6, 2013 at 4:49 am
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    ta 4 photos, yes mine is the same except the bearings are made out of hardened brass or similar(seems to be a better idea), what is important is the two parts male and female sit snugly together, no wobble(if it wobbles it could one is worn more likely the rosewood),no flats on the male cone(which I doubt as the wood would wear first): if the bearings have worn into the rosewood by being loose, the cone could have really made the far inside of the female part much bigger……..I would replace the rosewood, cos you have only just about”finished’ restoration, better now than 20 years down the line, you’ll feel happier about it, even though this might not be the problem. good luck.

  • September 5, 2013 at 6:09 pm
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    Hi Jarvis,

    My american ink drum might be very different from the western, here are some photos of both ends of the ink drum. What do you think? I have the original rosewood bearings.

  • September 4, 2013 at 10:17 am
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    hi Enrique-on my Western 4(licensed Vandercook copy) the drum has a metal face each side with an inset hollow cone, and these locate into coned bearings located and locked in from each side of the press, don’t overtighten or it is too much friction. Because of lack of oiling /grease ( I use car cv joint grease, nice and light but sticky)on my machine before arriving, there was a flat on one cone so the drum was not level and moved side to side scoring the side of the press, so I filed of the point of this cone slightly, which meant it could more fully insert into the female counterpart in the side of the drum so the cone sat inside ensuring the drum was fully supported….yes, I echo don’ overtighten the chain too. These presses would benefit from a grease point/oil point being fitted when manufactured……..

  • September 3, 2013 at 9:54 am
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    Hi Eric, that’s how I remember it, not seeing any adjustment possible besides the screws and nuts which have to go in quite a bit as to not to touch the carriage.
    Would new wood bearings help? Maybe nylamid or delrin replacements made by a machinist?
    I could inspect for wear if I remove it, and also make sure the chain is not over tightened.

  • September 3, 2013 at 9:30 am
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    Hi Jarvis. There is definitely sideways movement, or sideways play.
    There is a ever so slightly scoring mark on the operator side but it seems very new from what little time this press has been powered up, mainly for my tests.
    I haven’t as of yet fully deployed a job on it since I finished the restoration.
    Before I restored it nothing would move due to thick layers of dried ink, grime and rust. But there’s no scoring marks that would indicate it was set wrong.
    Ok, so I will take time to level it and then go from there. How can the ink drum be installed improperly? I had a hard time putting it back but I don’t remember any adjustments to make it not have play.

  • September 3, 2013 at 9:25 am
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    An ordinary spirit level won’t measure level of drum relative to bed with enough precision. I use a machinist’s surface gauge, usually with a dial indicator attached. More low-tech, one could also use a straight edge placed against a solid plate on the plate base. Shimming under the base would allow the straightedge to touch the drum precisely at a tangent. I repeat, the drum should be higher than type height to get sufficient contact between drum and rear form roller to drive the inking system.
    Every 4 I ever washed up has had some lateral motion to the drum.
    The mechanism of the 4 drum uses a bronze shaft held between screws in the frame, and wooden bearings. There is no adjustment possible. Some wear is to be expected. Where I have examined this, it is always on the drive side, which I see as a warning not to over-tighten the chain.

  • September 3, 2013 at 6:11 am
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    if there is any movement sideways to the ink drum, this would indicate the drum bearings were not reset to make the drum level and or bearings are worn(if there is for example scoring to the inside of the press chassis from the rotating drum this indicates previous wear to the drum bearings/not being set properly, did the drum move side to side when you bought it before restoration?);if press is set level in x and y dimensions then it is much easier to check level of ink drum and all subsequent rollers etc with spirit level to get near enough to make final adjustments.

  • September 2, 2013 at 9:20 pm
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    So, to go methodically about this, I would ideally get a nice bed plate first?
    I could possibly switch the SP15 for the No.4 as far as placing goes, but the No. 4 is a little shorter so it’s placed right where it works.
    Would taking off the drum and reinstalling it again help in spirit of voodoo workings?
    I’ve done it by myself before and it was very difficult. Good thing I now can have my brother help me.

  • September 2, 2013 at 11:03 am
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    There are two basic ways of examining roller contact, the stripe test and the pull test.
    Stripe, or jerk-stripe, is done when rollers are fully inked, then let to come to a complete stop. Depending on press design, you might quickly disengage the rollers, or jerk them forward (by flywheel or by inching the motor) so that the residual stripe of roller contact is brought into view. How thick the stripe should be depends on roller diameters, but in all cases the stripe should be of consistant width across its length. On the Vandercook this is a critical test of drum-to-form contact.
    The pull test is done with strips of paper or film placed in the roller nip toward the ends of the rollers. here it is done one roller pair at a time. Pull the test strips out and feel for an even tension. There were even test devices that used steel leaves and a spring gauge showing relative tension. On offset dampeners sometimes a sandwich of three layers was used.
    The stripe method is a common test on any inking system, letterrpess or offset. The pull method was also applied to offset dampening systems where no jerk stripe could be seen, but contact as still a critical factor. On both inking and dampening systems the final test was the drop stripe onto the plate, and this can be done on a full solid letterpress plate. Ink up, lift form rollers, bring carriage over form, drop rollers in place then lift. Examine stripe on solid form. Again, it should be an even stripe.

  • September 2, 2013 at 10:31 am
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    Bed and drum should have parallel surfaces. Rollers must be set to form surface for correct inking, and drum should be slightly higher and level for drive and distribution. If form and drum have skewed planes, trouble. If bed plate is off, trouble.
    Gerald Lange has stressed levelling of press, but has also recounted un-measurable improvements just from moving press within shop. There is voodoo at work among other factors.

  • September 1, 2013 at 4:34 pm
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    So I did some more testing. I used the flat bar that comes with the press to get an idea of how out of true the ink drum is. I was able to see light mostly on that side, also I checked with the rollers and sure enough there’s also light.
    A worn bearing also would add to this, right? But I could see it with the flat stock and the rollers. I’m guessing that the rubber would have to sit lower in order to make full contact.
    Here’s something to consider:
    My press is a galley height press, when I installed the new rollers I took the bed plate from one of my smaller table-top proof presses. But actually now that I remember that bed plate is not completely flat for my taste. So it might be that the rollers are actually not set right and they might need to go a little lower on that side.

    I don’t know. It’s one theory. I don’t really know how I will go about this.

  • September 1, 2013 at 1:47 pm
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    I was referring to the press leveling, I know my no. 4 does not have a level adjustment for the ink drum specifically.
    I do have new rollers and I carefully set them.

  • September 1, 2013 at 10:25 am
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    You can’t level the ink drum on a No. 4 as can be done with a 2190s. Shaft and/or drum bearings could be worn on the low side. But in any case the drum should not be blamed unless you know for certain it is not parallel with the bed (and relaitve to the bed it should also be slightly above type-height). The light ink on the far end of the drum might just be from bad contact between it and the form rollers or between the form rollers and the distributors, all of which have their own adjustments. The forms rollers can move up and down and the distributor carriage can be adjusted for skew through sliding blocks on the inner side of the carriage. Contact can also be hindered by damage to the support rods of the distributor carriage, if for example they have been dropped.
    I’ve seen 4s that despite new rollers, and careful setting of them, will still squeegee the ink over to one side. Don’t have any answer for that.

  • September 1, 2013 at 7:25 am
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    Ok, sounds reasonable. I’m afraid to mill the ink drum down as I fear the roller setting might then need to be too low to sit on the ink drum and that will affect the inking on my form. Am I thinking way out of line?
    I did have the oscillator and riders milled down 5 thou, but since they sit on top mostly by gravity it doesn’t really affect the inking coverage, but then.. I will try several things, and clean everything up, and also I want to discard the possibility of it being the leveling, so I will also do that.
    The ink drum was heavily rusted but mostly on the top that was facing up during its years of neglect. That could be the issue, I will try with a straight edge. What do you recommend for a straight edge?

  • September 1, 2013 at 6:08 am
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    The leveling issue doesn’t seem like the solution as it is not inking at both ends of the ink drum.

    It seems like the main problem lies with the ink drum.

    Possibly in cleaning the rust off of the ink drum with the Evaporust you’ve crossed some tipping point by removing too much of the surface and that you may need to have the ink drum milled down.

    If this was your first time inking the press it isn’t unreasonable that the problem was the fault of the previous owner.

    It seems like you could put a good straight edge against the ink drum and you could see the problem if I’m correct. Put a straight edge on it (has to be a good one) and shine a flashlight behind it and see if there is any light leak.

    Good luck.

  • August 31, 2013 at 11:46 pm
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    Hi Widmark, thanks for your comment!
    As far as I can tell, the 219 is a much more complete and complex press. I have removed the ink drum previously and could not devise a way to adjust the ink drum level. I will try with leveling the press first, I need to get a bubble spirit and a brand new ball bearing to make adjustments to the level.

  • August 31, 2013 at 11:10 pm
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    I had a similar problem with my 219os. I don’t know if the solution is applicable to other models, but on mine, you have the ability to level the ink drum, separate from leveling of the press. When I first got mine, it was not leveled and I saw results just like yours, which eventually lead to so much more contact on one side of the roller that it damaged the roller.

    I think a slightly unleveled press can cause ink migration (and eventual rail wear from uneven pressure) but more extreme issues that are that noticeable might be something else. An uneven ink drum, drastically uneven rollers, or transfer or roller wash or the vaseline onto the drum.

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