Roubo

Tool Cabinet – A Little HO Studley, Much More A&D Roentgen

As I slowly move forward with my ultimate tool cabinet the reminders and memories of the Studley Tool Cabinet are ever operating in the background as I strive to integrate the maximum inventory of tools into the space.  Fortunately (?) my tool cabinet will be five times more voluminous than Studley’s, which presents a multitude of opportunities and headaches.  Sure, I can include five times as many tools, but like Studley the multi-layered layout must be accomplished by hand and trial-and-error.  I expect that hugely time-consuming process will continue to infinity and beyond, or until I run out of tools to put inside.

Less problematic, at least in principle, is the decorative treatment of the presentation surfaces.  There I have a starting premise and need only to fine tune the execution.  My goal is to assemble a complex diamond-and-stringing parquetry surface evocative of the creative genius of Abraham and David Roentgen who, like many of the monumental French ebenistes, were Germanic.  My parquetry surfaces will be based on some of their work, but without the over-the-top exuberance.  As for decorating the interior surfaces, I have plenty of black dye, mother-of-pearl, and “bone,” both genuine and artificial.

Since beginning the project my efforts have vacillated between fitting the tools inside and mapping out the parquetry process.  For the latter I needed to create a very rough proof-of-concept panel that could provide useful information about tinkering with the size and proportions, and the process of executing whatever/wherever I wound up.

One of my foundational starting points was to use wood from Roentgen’s era for the veneers.  Fortunately I had a large inventory of leftover white oak scraps from the FORP gatherings in Georgia, which employed timbers that were literally growing at the time the Roentgens were active.  While none of the wood pieces were sizable, they were certainly process-able.

With a newly tuned bandsaw and brand-new, variable spaced teeth bandsaw blade I set to work making enough sawn veneer to execute the sample panel.

Stay tuned, this project will consume dozens of blog posts over the coming months.

Winter Projects (and well beyond) – Ripplin’

Making ripple moldings, and by extension perfecting my ripple molding cutting machine, is going to be part of my life for as long as it takes me to arrive at the horizon.  I am comfortable with the concept of my ripple cutter and will extend the invitation to my fellow ripplistas to spend some more time in the barn this winter/spring as I follow this trail.

In my current episode of rearrangeritis (my favorite Stumpy Nubs term) I’ve moved my machine into the heated studio in proximity to my finishing bench so I do not have that excuse to prevent me from noodlin’ it at my leisure.   Well, if I had any leisure.

Thanks to some barbarian who chopped up (!) a First Edition L’Art du Menuisier, (!!) and should be condemned to copy the encyclopedia by hand a la The Adventure of the Red Headed League, I’ve got a lot of original Roubo prints to frame, mat and mount for a display gallery at the top of the cabin stairs, so I’d better get to it.  This includes the plate of the ripple molding machine itself drawn and engraved by Roubo himself somewhat fancifully, given that he had never seen one in person and was simply imagining what it might be.

Clean-up “Christmas”

One of the aspects of having a humungous Fortress of Solitude like the barn, four stories of 40′ x 36′ space, is that there are a multitude of nooks and crannies into which things can be tucked, stuffed, crammed, lost, and re-discovered.  I call these instances my own “Clean Up Christmases,” when I come across treasures I had forgotten, or at least misremembered.

Such has been the case recently when prepping the classroom for this coming weekend workshop Historical Wood Finishing.  As the first class there in over two years, the space had, shall we say, devolved.  That pesky Second Law of Thermodynamics; they tried repealing it but it just didn’t take.  It has taken me over two weeks to get it ready for the group on Saturday.  The level of “rearrangeritis” (full credit to James “Stumpy Nubs” Hamilton for coining the phrase to describe an all-day travail when moving one thing in his crowded shop) has been monumental, and monumentally rewarding on several fronts.  It has also given me time for contemplation about future projects, a topic I will address in numerous upcoming posts.

At the moment I am mostly reveling the rediscovery of two caches that were set aside for some future completion.  The first is the two sets of brass Roubo-esque squares fabricated before and during that workshop more than two years ago; all it will take is a day or two with some files and Chris Vesper’s sublime reference square to get them up and running.

A second trove is the pile of French oak scraps from the multiple iterations of the FORP gatherings in southern Georgia.  I brought them home in order to turn them into veneers, probably oyster shell style, to use on some as-yet-unknown project.  That “unknown” identifier is becoming more “known” as the days go by.  Then, much like my shop being the only one in the county with two c. 1680 parquetry flooring panels from the Palais Royale in Paris, my tool cabinet will be the only one with veneers from some c.1775 oak trees from the forests surrounding Versailles.

Who knows what other “Christmas” presents I might find during the never ending effort to impose order on my space?  Stay tuned.

Workbench Wednesday – Romastonian Low Bench 7

With the detachable post vise finished I moved over to the opposite edge of the bench slab and installed a twin screw vise.

Unlike previous versions of the bench outfitting I’ve seen, I decided to cheat a little and use Roubo’s method of making it rather than the Roman version, as demonstrated in his veneer sawing bench from Plate 278 from L’art du Menuisier.

The projecting screws on the Roman version looked like a cracked kneecap waiting to happen.  The true Roman version would have looked a bit like this mock-up, featuring a gift vise from my pal Derek Olson.  Thanks a ton Derek. I use the vise/press a fair bit in the shop for veneer work, but as a feature of a low bench?  No thanks.  I’ve limped enough as it is (actually I am now walking without any limp for the first time since forever).

Instead, I drilled a horizontal 1-3/8″ hole into the edge of the slab, then tapped it with my Beale threading tap.  I  used a Forstner bit with an extension to get the depth of hole I wanted, about seven inches.

The tap was likewise too short for the hole so I augmented my tap handle with an extender from my 1/2″ ratchet set, which fit the end of the tap perfectly.

As the need arises I will drill and tap holes all the way down the edge of the bench so that I can put the twin-screw vise wherever I need it.  The beauty of a low bench is that it is omnidirectional in use.  If the vise is on the wrong side I just stand up, rotate my kiester, re-straddle the bench and sit back down to work.

Workbench Wednesday – Romastonian Low Bench 3

With the two timbers glued into one slab I pulled out my trusty scrub plane and started hogging off material since the wind was a tad pronounced.  I was able to get the initial pass finished out in the great room of the barn, and again put my mighty 10-inch circular saw to work cutting the slab to the 13″ width I wanted.  As with the initial timber splitting I was left with an inch or so to cut by hand.

Moving the sized slab onto my Roubo bench in the studio I employed the Roubo technique for achieving the flat plane of the slab.

First I shot a rabet down each edge of the slab, using two pillared winding stick to determine when they were perfectly parallel to each other.  My original Roubo winding-sticks-on-stilts were unavailable so I just used two hardware store aluminum bars sitting on identical blocks.  Once I had the parallel edge tracks established I grabbed the scrub plane and got the surface flat in about a half hour each side.  It’s worth noting that even though the wood was southern yellow pine, it was new growth SYP and much less dense than the timbers from the barn itself.

Next, it’s on to the staked legs.

Vintage Veneer Saw @MJD

If I did not already own one I would be interested in bidding on this 4-foot (!) veneer saw at the upcoming May tool auction at Live Free or Die Tools.  If you have  case of the Roubos coming on, this might be the medication.

Live Free or Die Auction Preview (mjdtools.com)

Lot SC21-411

Workbench Wednesday – SAD

 

One of my quirks is that I usually like to lay a piece of sacrificial sheeting on top of my workbench most of the time, and today was my day to swap out the old one for a new one on the FORP Roubo bench.  As I was making the swap I noted that it was also time to address one of the two main manifestations of Seasonal Affected Disorder that afflicts (?) wood in the natural course of events, sometimes called hysteresis, sometimes called rheological cycling, but generally known to us folks at the workbench as “wood expands, wood contracts.”  One of the consequences is that when there are pieces of wood assembled with different grain orientations eventually they get out of sync dimensionally.  In a Roubo workbench this become manifest as the tops of the leg tenons eventually protruding past the top of the slab.

As I was fitting new pieces of luan plywood to lay on the bench top I noticed that the tenons were quite proud of the slab, perhaps 1/16″.  I only assembled the bench a couple years go and did not notice the issue when I laid the initial sacrificial covering at the time, but it was there now.

You might have thought that since the bench was initially fabricated eight years ago it should be fully settled into its new environment.  Maybe, maybe not.  If the old adage that wood seasons at the rate of “one year for every inch of thickness” is true then the answer would be “yes.”  Since I moved to the hinterlands and talked to some of the local wood guys I have come to appreciate their view of seasoning woods, especially dense hardwoods.  To them “one year per inch” does not hold true; instead they use a formula of “one year for the first inch, two additional years for the second inch, three additional years for the third inch,” and so on.  By that metric my five-inch-thick bench top will pretty active for 1 year + 2 years + 3 years +4 years + 5 years, for a total of 15 years.

I dealt with the tenon ends directly in about an hour this morning, and will address the slight crown of the overall bench perhaps at the end of summer.

It might be worth reiterating that once I get a slab bench top flat I prefer to hit it with a toothing plane to give it a little texture.  I lose none of the planarity but gain a lot of grip on the workpiece.

 

Roubo Winding Sticks Video

While browsing around the interwebz over the weekend I noticed that Rex Krueger featured Roubo’s winding-winding-sticks-on-stilts from our Roubo on Furniture volume.  He is to be commended for bringing the message of hand-tool woodworking to a new audience.

Ripplemania III, Part Deux

As our recent week of Ripplemania III proceeded we were both making progress, albeit not entirely unhampered by glitches along the way.  John was very much involved in locking in his wave function (side-to-side) while I was dialing in my new swing-arm cutting head for narrow-ish ripple moldings.

Once I got the free weight on the pivoting head right it started producing some very nice moldings.  The anvil weighed just the right amount and I could slide it back and forth to adjust the force on the cutting tool, heavy for the initial cuts then lighter for the finishing cuts.

I also wanted to standardize the workpiece-holding aspect of the platen and spent some time making new clamps from a piece of aluminum angle stock,  This approach worked extremely well.

Another thing we did during the week was gather all the tool steel I had in my inventory to begin the work on making new cutters.  I had already ordered a variety of tool steel bars over the years for one project or another, when combined with the “used” tool steel I also had resulted in quite a pile.  Since I never throw away old planer blades there were a number of them, but the real treasure was the stack of hefty blades (~1/2″ thick) from a book producer’s guillotine that my pal Tom passed along to me.  These massive chinks will yield a large number of cutters, probably more than I will ever need.  I spent several hours working on a new cutter pattern for my machine but did not get that blade finished during the week.

Even before this week of prototyping John’s machine had ripple molding cutting nailed.  So, he pretty much spent the week trying to do the same for the wave molding cutting function.

In working through the problems of wave molding cutting John kept running into the hurdles caused by the elegantly complex head he had created for his machine, one that could do either wave or ripple moldings, and ideally even both simultaneously.  This was a really complex problem that expressed itself in a number of hiccups due to the lateral forces being exerted at the cutting edge.  He definitely made progress but the problem of the lateral forces and their effect on the cutter-head were not fully solved.

My issues were much simpler, just get a cutter head and workpiece holding system suitable for scratching out a simple  pattern.  One of the things I decided almost immediately was that my machine was too low to the ground, especially when cranking the handle to drive the moving platen, so I just hoisted it onto a pair of low sawhorse.  That helped my attitude immensely.

Ripplemania III

Last month my friend Ripplin’ John and I spent a week in the barn working on and brainstorming about our respective ripple molding machines, trying to get a model ready for the show-n-tell of Handworks 2020 (this is before we knew Handworks 2020 was being postponed by the Wuhan Virus).  I had made a little progress on my machine since Ripplemania II but he had made great strides with his.  During the week his main emphasis was on the lateral “wave” cutting function of his elegant machine while I was simply trying to get my newly designed cutting head to work properly.

Prior to our most recent week together I had also been working on the notion of improving the method and form of the ripple patterns themselves.  I tried a number of different methods and jigs but wound up realizing that precision layout and careful workmanship was the key to producing a crisp, precise concave pattern.  Throughout our week we discussed this issue and I am now thinking that concave is not the way to move forward, convex patterns may be the future.

As John was assembling his machine, a fairly lengthy process since it was totally disassembled to fit into hi vehicle, I was puttering on mine.

My new cutterhead  was now configured with the cutter being positioned at the end of a long weighted swing arm rather than inside a spring-loaded modulating frame structure.

I reasoned that the swing arm was a simpler approach and determined to give it a try.  Unlike John I narrowed the scope of my machine to do only one thing, namely cut ripple moldings of approximate 1-1/2″ stock width and 1/2″ thickness.  No wider, no thicker.  Thus my machine structure was much more restricted than his with approximately zero adaptability.

John had been working on two important evolutionary steps.  First, the machine could cut but ripple moldings and wave moldings within the same overall machine structure.  Second, that the machine could be mechanized and automated thus making it a more practical device for producing large quantities of moldings.  As he recited a truth to me, “Turning the platen drive handle gets old after a surprisingly short time!”

I’ll let you know how we progressed next time.