Joined boards bowing - Kreg Owners' Community2024-03-29T01:41:00Zhttps://kregjig.ning.com/forum/topics/joined-boards-bowing?feed=yes&xn_auth=noJay I have read and reread mo…tag:kregjig.ning.com,2012-05-30:2900167:Comment:4345832012-05-30T04:23:02.412ZJens Jensenhttps://kregjig.ning.com/profile/JensJensen
<p>Jay I have read and reread most of your replies and you are about the only person that can describe situations that occur in woodworking and I think everyone of us should take in consideration and practice what you explain to all of us.If we all followed what you say Im sure we would all be better woodworkers. All I can say is thanks for all of your contributions to this site</p>
<p>Grandpa</p>
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<p>Jay I have read and reread most of your replies and you are about the only person that can describe situations that occur in woodworking and I think everyone of us should take in consideration and practice what you explain to all of us.If we all followed what you say Im sure we would all be better woodworkers. All I can say is thanks for all of your contributions to this site</p>
<p>Grandpa</p>
<p></p> Thanks, Jay. I believe you a…tag:kregjig.ning.com,2012-05-29:2900167:Comment:4343112012-05-29T17:56:08.509ZDolores Wilkeshttps://kregjig.ning.com/profile/DoloresWilkes
<p>Thanks, Jay. I believe you are right as sometimes it bows and sometimes it doesn't, no matter what I do.</p>
<p>Thanks, Jay. I believe you are right as sometimes it bows and sometimes it doesn't, no matter what I do.</p> Hi Dolores, I just ran across…tag:kregjig.ning.com,2012-05-29:2900167:Comment:4343082012-05-29T17:30:49.485ZJay Boutwellhttps://kregjig.ning.com/profile/JayBoutwell
<p>Hi Dolores, I just ran across your post about your problem with the bowed lumber after you had build your project piece. I have ran across this many times in the past and believe it is a caused from a term that is known as "case Hardening" of the wood. This is caused when wood is dried too rapidly on the outer surface. When this is done moisture is trapped inside the cells of the wood below the outer surface, leaving the outer surface dry and the inter surface still holding a high…</p>
<p>Hi Dolores, I just ran across your post about your problem with the bowed lumber after you had build your project piece. I have ran across this many times in the past and believe it is a caused from a term that is known as "case Hardening" of the wood. This is caused when wood is dried too rapidly on the outer surface. When this is done moisture is trapped inside the cells of the wood below the outer surface, leaving the outer surface dry and the inter surface still holding a high moisture content. This causes the inter surface of the lumber to be in tension against the outer surface. When this lumber is worked and although it is finished in a flat even surface the moisture now begins to again excape the inter cells of the lumber and thus releases the tensions of the lumber which results in adverse movements of the lumber.</p>
<p>Look at it this way, is is like the hard dried surface of the outer layer acts like a moisture barrier that prevents the moisture from excaping the inter cells of the lumber. It remains there until it finds a method to excape to the surface. </p>
<p>There is nothing you can do different than what you have done. Once lumber is in this condition there is no method to determine if it is going to twist, cup or bow until you begin working it. I have made it a practice to cut my lumber down to near its final sizes and often lay it a side for as much as a day or two to see it it moves and changes directions before I finish cut it and use it in my project.</p>
<p>There is has been many times that I have cut even the finest wood available and have it twist and move and twist right off the saw blade with one side headed over to the next county or lifting up off the saw table. </p> Dolores,
Hope you were able t…tag:kregjig.ning.com,2012-05-28:2900167:Comment:4341842012-05-28T01:12:11.452ZKen Dargahttps://kregjig.ning.com/profile/KenDarga
<p>Dolores,</p>
<p>Hope you were able to resolve the issues you experienced.</p>
<p>Dolores,</p>
<p>Hope you were able to resolve the issues you experienced.</p> Dolores,
mo khan posted--->…tag:kregjig.ning.com,2012-04-15:2900167:Comment:4202882012-04-15T12:28:38.897ZKen Dargahttps://kregjig.ning.com/profile/KenDarga
<p>Dolores,</p>
<p><em>mo khan</em> posted--->>>...<span><em>location of pocket holes doesn't matter</em><<<</span></p>
<p><span> Perhaps <em>mo khan</em> meant to write ''<strong>orientation</strong>''---</span></p>
<p><span>which I would interpret that to mean alternating the screws ''direction''.</span></p>
<p><span>So that every other screw with it's point facing one another.</span></p>
<p> Location does matter---</p>
<p>the screws need to be placed at a suitable…</p>
<p>Dolores,</p>
<p><em>mo khan</em> posted--->>>...<span><em>location of pocket holes doesn't matter</em><<<</span></p>
<p><span> Perhaps <em>mo khan</em> meant to write ''<strong>orientation</strong>''---</span></p>
<p><span>which I would interpret that to mean alternating the screws ''direction''.</span></p>
<p><span>So that every other screw with it's point facing one another.</span></p>
<p> Location does matter---</p>
<p>the screws need to be placed at a suitable spacing, from each end and between the fasteners---</p>
<p>so as to provide adequate clamping pressure along the joined seams.</p>
<p><span> </span>Review Kreg's manual and their instructions/recommendations---they also have some videos. </p>
<p> If I recall correctly, (I don't have the manual in front of me), Kreg suggests a spacing of 2'' from the ends and 6'' between screws.</p>
<p>On some projects, I've installed screws closer to the ends and a spacing of 4'' between screws. Perhaps it was a little overkill, but the results were acceptable, for the project at hand. </p>
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<p> </p>
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<p></p> Thanks for all the replies. …tag:kregjig.ning.com,2012-04-15:2900167:Comment:4200322012-04-15T04:12:40.248ZDolores Wilkeshttps://kregjig.ning.com/profile/DoloresWilkes
<p>Thanks for all the replies. </p>
<p>@Ken - you said earlier that the direction of the pocket holes made no difference and now you suggest alternating the direction? That is what I will try as it seems that it would equalize the pressure. Thanks!</p>
<p>Thanks for all the replies. </p>
<p>@Ken - you said earlier that the direction of the pocket holes made no difference and now you suggest alternating the direction? That is what I will try as it seems that it would equalize the pressure. Thanks!</p> When edge joining boards, usi…tag:kregjig.ning.com,2012-04-15:2900167:Comment:4200282012-04-15T02:41:47.568ZKen Dargahttps://kregjig.ning.com/profile/KenDarga
<p>When edge joining boards, using the Kreg joinery fasteners, </p>
<p>I'd suggest alternating the direction of the screws. </p>
<p>REASON: so as to obtain more equal clamping pressure on the joint.</p>
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<p>When edge joining boards, using the Kreg joinery fasteners, </p>
<p>I'd suggest alternating the direction of the screws. </p>
<p>REASON: so as to obtain more equal clamping pressure on the joint.</p>
<p></p>
<p></p>
<p></p>
<blockquote cite="http://kregjig.ning.com/forum/comment/show?id=2900167%3AComment%3A420185&xn_out=json&firstPage=1&lastPage=1&xg_token=5571ea76fb3118bcf57fac78400303d3&_=1334457110486#2900167Comment420185"><div><p></p>
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</blockquote> The types of wood warping inc…tag:kregjig.ning.com,2012-04-15:2900167:Comment:4201852012-04-15T02:31:51.036ZKen Dargahttps://kregjig.ning.com/profile/KenDarga
<p>The types of wood warping include:</p>
<ul>
<li><b>bow</b> : a warp along the length of the face of the ood</li>
<li><b>crook</b>: a warp along the length of the edge of the wood</li>
<li><b>kink</b>: a localized crook, often due to a <a href="http://en.wikipedia.org/wiki/Wood#Knots" rel="nofollow" title="Wood">knot</a></li>
<li><b>cup</b>: a warp across the width of the face, in which the edges are higher or lower than the center of the wood</li>
<li><b>twist</b>: a distortion in which the…</li>
</ul>
<p>The types of wood warping include:</p>
<ul>
<li><b>bow</b> : a warp along the length of the face of the ood</li>
<li><b>crook</b>: a warp along the length of the edge of the wood</li>
<li><b>kink</b>: a localized crook, often due to a <a rel="nofollow" href="http://en.wikipedia.org/wiki/Wood#Knots" title="Wood">knot</a></li>
<li><b>cup</b>: a warp across the width of the face, in which the edges are higher or lower than the center of the wood</li>
<li><b>twist</b>: a distortion in which the two ends do not lie on the same plane</li>
<li>c<strong>heck</strong><span>: to split along the length of the board (often due to improper drying)</span></li>
</ul>
<p></p>
<p><img src="http://i-cdn.apartmenttherapy.com/uimages/ny/warping_illustration.jpg"/></p>
<p></p> flip the boards, so grain goe…tag:kregjig.ning.com,2012-04-15:2900167:Comment:4201802012-04-15T00:57:12.134Zangie brashearshttps://kregjig.ning.com/profile/angiebrashears
<p>flip the boards, so grain goes different each board....anything i think over 30 long needs support, 32's right on the line :)</p>
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<p>flip the boards, so grain goes different each board....anything i think over 30 long needs support, 32's right on the line :)</p>
<p></p> with a jointer. The individu…tag:kregjig.ning.com,2012-04-14:2900167:Comment:4198582012-04-14T03:34:48.810ZDolores Wilkeshttps://kregjig.ning.com/profile/DoloresWilkes
<p>with a jointer. The individual boards are not cupping - it is the whole joined board that is cupping.<br/> <br/> <cite>Rick said:</cite></p>
<blockquote cite="http://kregjig.ning.com/forum/topics/joined-boards-bowing#2900167Comment420008"><div><div class="xg_user_generated"><p>Hate to ask the obvious, but how did you edge the boards? Could one of the boards be cut not true at 90 deg?</p>
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<p>with a jointer. The individual boards are not cupping - it is the whole joined board that is cupping.<br/> <br/> <cite>Rick said:</cite></p>
<blockquote cite="http://kregjig.ning.com/forum/topics/joined-boards-bowing#2900167Comment420008"><div><div class="xg_user_generated"><p>Hate to ask the obvious, but how did you edge the boards? Could one of the boards be cut not true at 90 deg?</p>
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