Walnut picture frame

Francois

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Joined
Apr 28, 2008
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6
This is the second frame that I build ( and third woodworking project ever).

The first frame ended up ok, but rabbeting the back had been messy (as in: required sanding to get a somewhat flat lip for the glazing to push against) as well as messy (as in: getting covered with saw dust from head to toe).
At least, I avoided the messes that could have resulted from using the wrong bit for the task (flush routing bit with a bearing toward the collet), and trying to compensate by stacking narrow boards on top of each other to give something that the bearing could follow.

I read about alternatives to make the rabbet more safely (rabbeting sets with 1 bit and several bearings, or copying arm for the Festool's routers), attachments to collect some of the dust, and ways to make the router more stable on narrow boards.
I ended up getting the OF1400 and a rabbeting set.
I would have liked to use the copying arm and a regular bit, but it seems that the copying arm would be in the way of the dust collection attachment that came with the OF1400. If there is a way to use both the cup and the arm, I would be interested.

So here is the before picture (un-routed frame glued using dominoes):
[attachimg=#]

The setup I used to hold everything in in place while routing (the support foot is barely visible on the left side of the router):
The chip catcher barely fits above the rail, but it was very stable.
[attachimg=#]
By the way, I had to order the foot separately, and hold it by re-using the knob that was setup to hold the 2 metal bars that connect to the optional edge guide or guide stop. Isn't the foot and a knob supposed to come with the OF1400? The Rockler's people did not know...

I did not know what to expect in term of amount of dust that would be missed by the vaccuum.
In case someone else is wants an illustration:
[attachimg=#]
This is almost all the dust that escaped after removing 12x12mm rabbet over 3 meter of length.
The good thing about routing the inside part of the frame, is that the dust was coming out away from me.

For comparison, I created almost the same amount of dust when I had to remove the chip catcher to rout about 40 cm in the corners.

A little oops - I had used 2 dominoes at each corner, but the inside one was too close to the edge:
[attachimg=#]
I am assuming this won't be  problem.
Overall, I am pleasantly surprised at how smooth and straight everything is.

The following picture worries me:
[attachimg=#]
I noticed a hairline crack after gluing up, and it seemed bigger today.
It may have something to do with my use of the camps to push the boards together while gluing-up; maybe I did not align the domino correctly and the force of the clamps caused the board to crack?
Does this kind of things stay put, or will it keep getting worse?

I welcome any advice, as I would like to practice on a few more frames before moving on to building windows.
 
Hi,

I would fill the crack with some CA and then sand or plane it smooth. Wood filler is not going to help you here.

There was an episode of the wood whisperer in which he talked about this type of problem.

I was wondering why you did not cut the rabbets before gluing the frame, and also why you did not mitre the frame corners?

By the way, it looks like some very nice walnut,

Richard.
 
The best joint for a picture frame would be :

-lap joint for the back part of the frame without miter
-miter joint with dominos for the front part of the frame

or combined miter with dominos and lap joint for back part of the boards

Cheers

Alex
 
Richard, I chose not to use miter joint for several reasons:
- my wife and I liked the simpler look
- it seems easier to make adjustment if needed, whereas I don't see how to tweak a mitre joint that does not close properly the first time.
- I would like to learn a method I can use on window panes, which seems to be mortises and tenons

If I use CA, do I just let it seep in the crack, or should I use clamps?

I could have routed the rabbet before gluing; just wanted to try something different and make it easier to get a good alignment between the rabbeted parts.

Alex, when you talk about the "best joint", do you see some issue with domino-reinforced but-joint (beside looks)?

Thanks for the feedback

Francois
 
No, you don't need clamps. The CA is just to stop the crack getting bigger. If you sand whilst the CA is setting, the dust will help conceal the glue.

Richard.
 
Just a few reponses to the various points/questions:

That crack definitely could've been caused by forcing slightly bent stock to form the joint.  The glue and Domino are stronger than the surrounding wood, so the crack is probably indicative of wood failure.  As suggested by mouppe, use some CA glue soon.

Use *thin* or medium CA glue, so it fully penetrates the crack.  Take a bit of that sawdust you had (the really fine stuff) and sprinkle it over the crack *after* semi-flooding the crack with glue.

Window panes:  Using Dominos IS making mortise and tenon joint.  Should be plenty strong as long as you use enough and the right size (e.g. a double stack of 10mm Dominos, if the material is thick enough).

To mouppe:  rabbeting the frame before glue up is tough (IMO) because you have to make stopped rabbets on two boards (and that equals four stopped rabbets) when doing a non-miter-cornered frame..  Rabbeting with it assembled assures everything lines up nicely and just takes a minute or three to cleanup the corners with a chisel.

 
Thank you all!

I used some CA glue (don't know whether it was thin or medium). It seemed to seep in the crack very quickly, although I don't know how deep it went.

It dried faster than I expected.
By the time I set the bottle of glue down, it was too dry and the dust did not adhere at all.
I'll do some test on leftover walnut to see how it looks after sanding and finishing. I am currently thinking of using shellac.

 
Hi wood junkie,

I take on board your point about the stopped rabbets being more difficult to cut but since they are on the hidden back side of the frame, you have a little more room for error. If your stopped rabbets go too far, it should not make too much difference...as long as you don't go all the way to the edge.  [eek]

Francois, sounds like you used the quick-dry CA if it took less than 15 seconds to set! Not to worry, at least the frame is now structurally sounder.

Richard.
 
Meanwhile here, in Arizona, its so dry that I'll read the CA bottle and it'll say "hold for 30 seconds" and you're done (this was a gel type).  I hold. Check? no.  I hold.  Check? no.  Daydream. Check? %@$#! NO!  The last 2 tiny tubes usually took 70-90 seconds to fully grab.

But, it's okay.  I was born with the accelerator so I now put the glue on side A, lick my thumb, rub on side B, join.  20 seconds later, done!
 
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