Subject: Re: How to un-bow a board

From: [email-masked]
Date: Sun, 09 Feb 1997 05:01:11 GMT

On 3 Feb 97 10:31:19 GMT, [email-masked] wrote:

>In article <[email-masked]> [email-masked] (Auctor Ignotus) writes:
>>From: [email-masked] (Auctor Ignotus)
>>Subject: Re: How to un-bow a board
>>Date: Fri, 24 Jan 1997 16:52:09 GMT
>
>>On Thu, 23 Jan 1997 14:18:48 UNDEFINED, [email-masked] wrote:
>
>>(snip)
>>>
>>>>BTW, I can understand how a jointer can remove a WARP or a CUP, but
>>>>just how is it supposed to remove a BOW???
>>>
>>>I'm not sure you know what a jointer is.   It will remove a cup, bow or twist. 
>>> The term WARP is ambiguous.
>>>
>
>
>>With all due respect, sir, you are incorrect.  Warp, Cup, Bow, and
>>Twist are all technical terms with distinct definitions (I spent many
>>years in the lumber business).
>
>>A Warped board will lay flat on it's faces, but the longitudinal edges
>>will not be straight.  The board takes on a "C" shape.  A Warped board
>>is "straightened" by ripping or jointing the curved edges thereby
>>"straightening" them and also reducing the WIDTH of the board.

I have heard of this condition referred to as "crook."  Cup, bow,
twist and crook would therefore all be types of "warp."  Could it be a
difference in regional terms?

Rick Marinelli
[email-masked]

---

From: [email-masked]
Date: 3 Feb 97 10:31:19 GMT

>"straightening" them and also reducing the WIDTH of the board.

Technically, you are correct.  However, the great majority of people use the 
term 'warp' to indicate any tight of crookedness - thus,  my assumption was 
logical, albeit a bit premature, and I apologize for that.

>A Bowed board will not lay flat on it's faces, but the edges will be
>straight.  The board takes on a "U" shape.  A Bowed board will have
>one longitudinally concave face and one longitudinally convex face,
>much like an archery BOW (hence the name).  A Bowed board cannot be
>"straightened" by cutting as can boards posessed of the previously
>mentioned deformities.

Well, of course it can - with a tool called a jointer.  I really can't believe 
someone with 'many years in the lumber business' has never removed bow with a 
jointer.  It's true that the amount of bow may require much material removal, 
but in these instances you either use the wood for a project where being bowed 
is acceptable, or you cut it for smaller pieces, and then joint the bow out of 
it.   

  The only "surgical" solution to a Bow is to
>either cut latitudinal relief cuts in the concave face (ugly) or to
>resaw the board into thin plies and then laminate them back together
>in a flat plane (very labor intensive and only slightly less ugly).

Both of those solutions would be a silly waste of time, IMO.

>If you attempt to thickness plane a Bowed board you will only end up
>with a THINNER Bowed board.

Well, of course - that's why jointers and planes are still made today.

>  Your proposed solution to the problem is therefore errant.

My only solution was to use a jointer, which is certainly not errant.

>As to your allegation that I do not know what a jointer is, you speak
>from a position of ignorance.

That is true, but by stating that a jointer could not remove bow, you proved 
your ignorance yourself.

>As to your belief that the "flamer" was just trying to be funny, I
>maintain that his post was merely "snotty".

Now you are either mixed up, or being inappropriate.  At first you complained 
to me via email, and I replied by email.  Now you are complaining publicly 
while referring to my email.   

>A famous man once quipped that "It is better to remain silent and be
>thought a fool than to open your mouth and remove all doubt."

And since you decided to turn a private discussion into a public one, you 
certainly ought to know.  My doubts about you have certainly been removed.

Rich