humidity level for conditioning new pinblock

[gordon stelter]

Yeah, mine.
     And if its a  Kenmore you will find that when it
burns out replacing the motor/compressor costs more
than buying a  new one. I would recommend building a 
"dry room" big enoiugh for what you're working on, or
moisture proofing your shop. What you will save on
electricity could pay for it quickly.
     Thump


--- Bob Hull <hullfam5@yahoo.com> wrote:

> Thanks for the feedback about the pinblock mc
> conditioning prior to drilling.
> 
> With the dehumidifier running full tilt again (rain
> here in TN for last several days) the shop humidity
> level has come down.  The pinblock in the hot tent
> is
> being basked in 38% rh.  Was 44% yesterday and 54%
> two
> days ago.  I don't think the block was exposed to
> the
> 60+ rh for too long, so I don't think I'm too
> worried.
>  I don't have the Hoadley handbook - is that the
> Physical Laboratory Handbook?
> 
> I think my dehumidifier maybe too small for my shop
> (1400 sq. ft.) since it runs constantly in the
> spring,
> summer and fall.  I shoot for about 45% rh.  Does
> anyone else's dehumidifier in a similar climate have
> to work that hard?  
> 
> Bob Hull 
> 
> 
> --- Farrell <mfarrel2@tampabay.rr.com> wrote:
> 
> > Well, I haven't seen a reply to your post yet, so
> > I'll take a stab.
> > 
> > First of all, if you have a dehumidifier, why is
> > your shop up to 63% RH -
> > although that's not really terribly excessive? I
> > would suppose the best
> > humidity level would be whatever RH the piano is
> > expected to live in - or
> > rather, the middle of the RH range expected.
> > 
> > I guess if you live in New Mexico, it may be
> > worthwhile to let the block sit
> > for a month or so to let it come somewhere in the
> > range of it's
> > surroundings. If you live in coastal Washington
> > State, you may want to wait
> > a while also while the block absorbs some water.
> But
> > for most climates, your
> > shop is probably not so terribly far from some
> > midpoint of an expected RH
> > range for the piano's future.
> > 
> > But how long has is been in your shop? Did you
> just
> > get it delivered from a
> > supply house? If so, you may not really have much
> > idea at all about the MC
> > of the wood.
> > 
> > I like to buy my wood at least six months to a
> year
> > before I intend on using
> > it - most of it sits for more than a year or two
> > before use. I've got a
> > large supply of rough-sawn spruce, maple and a few
> > pinblocks residing in my
> > constant-humidity shop. Doing that simply
> eliminates
> > this whole
> > hard-to-answer question/concern regarding wood MC
> > stability. A
> > several-inch-thick hunk of hardwood can take
> months
> > for its MC to come into
> > equilibrium with its environment, depending on the
> > RH/MC contrast.
> > 
> > Bottom line: It's probably OK. If you are not in a
> > rush on this job, let it
> > sit for a few weeks or however long you can. A
> good
> > cross-grain-laminated
> > pinblock shouldn't be changing all that much is
> size
> > anyway with small
> > changes in MC.
> > 
> > Or maybe I should have just kept it short and
> said:
> > I dunno.     ;-)
> > 
> > Terry Farrell
> > 
> > www.farrellpiano.com
> > 
> > ----- Original Message ----- 
> > From: "Bob Hull" <hullfam5@yahoo.com>
> > To: <pianotech@ptg.org>
> > Sent: Saturday, October 30, 2004 2:10 PM
> > Subject: humidity level for conditioning new
> > pinblock
> > 
> > 
> > > The humidity in my shop today is 63% and higher
> > than I
> > > usually try to keep it.  I'm getting a block
> > ready,
> > > the flange fitting is done; What would be the
> best
> > > level for the humidity to be and for how long to
> > > enhance the drilling/pin torque outcome? This
> > block
> > > (Weber 5' 6") has been a "bear" for me with a
> > double
> > > flange, plus thicker in the bass, and bow or
> warp
> > > across the block area of the plate.
> > >
> > > I just put the block under a "tent" with 2
> heater
> > bars
> > > and it has dropped the humidity to 54% over the
> > course
> > > of . I don't have a MC gauge but I have a
> > > dehumidifier.
> > >
> > > I'll appreciate your comments.
> > >
> > > Bob Hull
> > >
> > >
> > >
> > >
> > >
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> 
> 
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