Showing posts with label Mortises. Show all posts
Showing posts with label Mortises. Show all posts

Tuesday, December 27, 2011

A Beefy Base - TWW Roubo Build Part 6

Welcome back for the sixth installment of my build for The Woodwhisperer Guild Roubo bench build.  Upfront, I apologize for not capturing and subsequently glossing over some of this process. I'm still not great at remembering to always document.  I get caught up in the process and totally forget.

The first up was laying out the mortises for the top to land on to the base.  Again, the Sketch Up model that Aaron Marshall did for Guild was open and constantly referenced.  Using Aaron's model has convinced me that Sketch Up is a must for me to learn.  Any questions I've had during this build have been easy to answer by referencing the exploded views.  I am always tailoring some of the measurements due to my bench being both 10 feet long and only having a 3 inch laminate top.  

I had been planning on routing the mortises, but wasn't really looking forward to it because of all the dust it would be creating.  More on dust later.  Through discussion on Twitter and an earlier recommendation by Rob Bois of The Bois Shop (A VERY excellent podcaster), I decided to buy the Triton 2 1/4 HP plunge router.  While, according to all the input, the Triton did not have the 5 star rating of the Festool routers, it did have really good dust collection and at a much lower price point.  Luckily, Milne Power Tools, which is conveniently right across the street from my office, carries the Triton brand.  When I got the router home, I made a few modifications with foam tape to help the dust collection to be a bit more effective and set up what I like to call my white trash boom arm.  
This allowed me to route without dealing with the weight of the vacuum hose, which I fed over the top of the only interior wall and suspended with a rope.  If I had only had some baling wire!
Once the mortises were cut, I set up the Excalibur sliding table with the miter fence and cut the legs to length and also cut the tenons.  
I'm essentially a lazy person, so I just nibbled the material away rather than deal with changing out my everyday blade with the dado set. It really didn't take up any time and the cheeks cleaned up quickly with my 2 inch chisel.
  
I spent quite a while perfecting the fit of the legs to the top, but I'm finding more and more I actually love hand work.  I can lose all track of time while I'm playing with a sharp blade on wood.  The size of these tenons was a real joy to work with the 2 inch chisel.  The angle is set rather shallow to be a really great paring blade.

Once I was happy with the fit of the legs to the top, I stopped and milled all the stretcher parts.  This is a process that I forgot to document.  I still use, and sure I always will, power tools for any of the processes that would be labor intensive with hand tools.
Since I plan to first assemble the ends, I made sure the legs were dead square and marked the shoulders of the tenons.  I then laid out the mortise on the legs that will house the stretchers.  Again, I extensively used Aaron's Sketch Up model.  
The next part, which I know some are interested in, was again missed in photo documentation.  The Woodrat, a machine that I really love, is also a machine I really hate. I have not come up with a good solution for dust collection while using it.  I couldn't cut the tenons with the Triton because they were too deep for the Triton plunge capacity.  The Woodrat really excels at rather quickly cutting mortises, although I don't have mine set up to easily handle this size of timber.  You can get a pretty good overview of what the Woodrat is capable of on the Woodrat Site.  I don't remember the name of the guy, but before he died, he reviewed tools and showed how to use them in great detail.  He always had some young lady helping him out.  If you remember his name, please post it in the comments.

Tonight I finished up the mortises and will start the stretchers tomorrow.  If there are any processes you have a question about or frankly advise on a better way to do a process, please let me know in the comments.

Thanks again for following the build!

Wednesday, December 14, 2011

The Woodwhisper Guild Roubo Build-Part 4


The last two evenings I haven't had any time in the shop, except to clean up a bit.  But, this weekend, which started on Friday, I awoke to a damp and frosty morning.  It was the perfect start to a blissful weekend in the shop.

The first thing I worked on was the finishing touches on the mortise and tenon for the end cap.  This was the second tenon I've cut.  The first was at WIA '11, where I was fortunate enough to have Adam Cherubini give me some one on one instruction on sawing.





For my second tenon and a monster tenon at that, I did pretty darned good with my new Bad Axe Beastmaster and Wyatt Earp saws.  The tenon required very little work to fit just right into the mortise.





The fit was just about perfect.  I left the cap a little proud on both sides to allow me to flush it up after I've got everything together.
Next, I went back and poured over the PDF from Benchcrafted and the Sketch Up plan that  Aaron Marshall has put together for the The Woodwhisperer Guild before I started drilling holes to both attach the end cap to the top and the ones needed for the tail vise.




The Benchcrafted instruction are VERY clear that a perfect fit is essential for flawless operation.




Next up was the part I was dreading the most.  I really hate dust and have tried to design excellent dust collection through out the shop.  The one weak area is any hand held routing operations.  On the next post I'll review the Triton router I bought in response to the mess made when I routed the channel for the tail vise screw.

The initial fit looks very good.  I think it will be dead on!

For the next exercise I got to put my sharpening station to good use.  I drilled the holes for the bolts that attach the cap to the bench and drilled and chiseled out the holes to capture the nuts.
You can see in this photo how hard the winter growth rings are in this Fir.  After talking to Shannon, who is my Hand Tool School teacher, I'm increasing the angle of my bench chisels from 20 degrees to 25 and adding a steeper micro-bevel.

In the midst of all this, I managed to mill up my legs, deadman, and leg vise boards.  I'm going thicker on the legs than in the plan.  Mine are 5 3/8" x 4 1/4".
Hopefully, this weekend I'll finish up the top and move on to the base!