Re: [PPLetterpress] Re: Trip mechanism on Vandercook 325A
- Russ -
This does, indeed represent my trip mechanism. If I understand you
correctly, and from working with the press it makes some sense,
tripping the press isn't really necessary since the paper precedes the
rollers? One would have it in print mode to ink the type, and since
the tympan is in front, there's no need for tripping to ink? I'm not
sure if that's accurate. All I know is that chain has come is not at
tight as it was when I first got it (nine months or so ago. . . .)
We had a snow day here in Evanston, so I've not had a chance to get
under it and look for the oil holes you mention. Your drawing was
easier for me to follow than the schematics in the manual I have.
I'm afraid I don't know what "chamfered" means?
On Feb 1, 2008, at 8:15 PM, russwiecking wrote:
> > --- In PPLetterpress@yahoogroups.com, "russwiecking" russ@ wrote:
> > > Looking at my press today I see that there is a chamfered,
> > > unthreaded hole to the right of the trip handle.
> > Russ, I've never seen a 315 so I can't even guess what how your trip
> > mechanism works. But that hole rather looks like a oil hole
> > --something often overlooked on Vandercooks!
> > Eric Holub, SF
> You are right. I was going to say that a horizontal oil hole was
> poor. What was I supposed to do, turn the press on its side to lube
> trip lever? Ah, well, on closer examination the hole, which is 3/32
> diameter, is angled slightly downward as well as into the trip lever
> shaft bore. So, again, I think you are right. Other oil holes on the
> press are chamfered the same as this one.
> linkagetcm.jpg> (Eileen. Does this schematic represent your 325 A's
> trip mechanism?)
> On my press, which uses an inking plate, distribution of the ink is
> accomplished by running the carriage back and forth on the bed. During
> this operation the rollers must be in print position in order for them
> to contact the ink plate as well as for the pinions to engage the rack
> (Which, BTW, is the same rack that the cylinder engages. There is no
> rack dedicated to the rollers as would be found on an SP-15, for
> instance). This means there can be no matter on the bed during ink
> distribution which, in turn, means that there is no need to put the
> cylinder in trip for this operation. In fact, it would seem slightly
> undesirable to run the carriage in trip position due to the wear
> by poor cylinder-to-rack engagement. Anyway, it seems that this press
> may have had no need for anything more than a "one time" manual trip
> and, hence, no lock.
> What do you think? If there is a missing lock mechanism it would
> certainly be located in the vicinity of the block that houses the trip
> lever as shown in the schematic, perhaps mounted to a plate that would
> be sandwiched between the under side of the press bed and the block.
> Russ, S?
> [Non-text portions of this message have been removed]
[Non-text portions of this message have been removed]
I am only familiar with 325A thanks to the picture on Moxon's site.
Comparing the pictures (http://vandercookpress.info/images/325AH.jpg
and http://vandercookpress.info/images/315.jpg). Though I can't see
how your rollers work, it looks like the 315 is almost a functional
mirror image of the 325A. So my question is, does the form have to be
off of the press bed when you ink the rollers? If so, then maybe you
do not need a trip lock. I'm sure someone who knows presses better
than I, can correct or confirm.