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Tips for successful glue ups

Posted: Tue Jun 16, 2015 5:55 pm
by mbcabinetmaker
To be successful it is essential to have 4 straight and square edges when gluing up panels. This is my system.




I start out by face jointing.  This establishes the first flat straight surface.
I start out by face jointing. This establishes the first flat straight surface.
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Next I will joint one edge by running the freshly jointed face side against the fence.
Next I will joint one edge by running the freshly jointed face side against the fence.
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At this time I will mark both surfaces that have not been machined.  You can skip this step if you are working with rough stock. It will be obvious.
At this time I will mark both surfaces that have not been machined. You can skip this step if you are working with rough stock. It will be obvious.
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To machine the 3rd surface I use the planer.  Now I have 3 flat and straight sides.
To machine the 3rd surface I use the planer. Now I have 3 flat and straight sides.
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The table saw is used on the final edge to make sure it is parallel with the other edge.
The table saw is used on the final edge to make sure it is parallel with the other edge.
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Re: Tips for successful glue ups

Posted: Tue Jun 16, 2015 6:19 pm
by mbcabinetmaker
One final pass over the jointer removes the saw marks and cleans up the edge for gluing. Now I have 4 flat, straight and parallel surfaces.
One final pass over the jointer removes the saw marks and cleans up the edge for gluing. Now I have 4 flat, straight and parallel surfaces.
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This is a very critical step. Notice I have marked the grain direction on the  ends of the boards and alternated the direction. Well with the exception of one board that has a bad place. I had to yield to the better side.
This is a very critical step. Notice I have marked the grain direction on the ends of the boards and alternated the direction. Well with the exception of one board that has a bad place. I had to yield to the better side.
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I like to use dominoes or biscuits for alignment.  Just make sure you place them where they will not be cut into later.
I like to use dominoes or biscuits for alignment. Just make sure you place them where they will not be cut into later.
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A good flat surface is needed for the clamping.  Make sure to clamp both top and bottom for even clamp pressure.  I dont worry about trying to remove the squeeze out until it has been clamped for 2 hours.  At that time you can use a glue scraper and it will easily come off. Dont wait to long though or it will dry to much and tear the grain of the joint when scraping.
A good flat surface is needed for the clamping. Make sure to clamp both top and bottom for even clamp pressure. I dont worry about trying to remove the squeeze out until it has been clamped for 2 hours. At that time you can use a glue scraper and it will easily come off. Dont wait to long though or it will dry to much and tear the grain of the joint when scraping.
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Now some of you will notice that I did not use the guards on my jointer. I am a professional and do not recommend doing this at home. These were fairly large pieces but if they were small I would take time to set up the guard. As with any multi use tool such as the Shopsmith and my CU300 the guards are not always in place when you are ready to work. Please take time to set yours! ;)

Re: Tips for successful glue ups

Posted: Tue Jun 16, 2015 6:22 pm
by algale
Great post, thanks!

Re: Tips for successful glue ups

Posted: Tue Jun 16, 2015 8:29 pm
by joedw00
Thank you for the post.

Re: Tips for successful glue ups

Posted: Tue Jun 16, 2015 9:36 pm
by jsburger
mbcabinetmaker wrote:To be successful it is essential to have 4 straight and square edges when gluing up panels. This is my system.




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That is EXACTLY what I do here. BTW, I use mostly rough sawn stock.