Matching the kerf of a saw cut for knot pens

[randyrls]

Sometimes when cutting the inserts for knot pens it is difficult to cut the small inserts to exactly the correct kerf size. The secret is to make a spacer piece that fits in the jig and is exactly one kerf width too short.
Here is the concept:

I am assuming that you are using an angled jig of some sort to do the cuts.

1. Cut the blank so it is exactly square. Cut a piece of scrap wood just smaller than the blank. Not critical, but must be twice the length of the blank.

2. Cut the insert material so it is 1/16" to 1/8" smaller than the blank. The reason will be clear later. Just make sure the insert is large enough to create the pen you have in mind.

3. Take the scrap piece and cut all the way thru it using the angled jig. Now take the off-cut piece, reverse it and cut it again. You now have two identical pieces. Put one piece on the jig and butt the other piece against it. Run the saw thru the piece. You now have a piece that is shorter by exactly the kerf width. Use this piece in the jig and slice the insert pieces.

4. On a table saw (referred) or band saw cut most of the way thru the blank. Leave a 1/16" to 1/8" portion uncut. Now glue the insert pieces into the slot. Do this four times for the blank.

Make sure you keep your fingers safely out of harm's way. I use clamps while cutting and glue to hold the jig pieces together.

[dalemcginnis]

Pictures please. I'm conceptually challenged :D

[fiferb]

Originally posted by dalemcginnis

Pictures please. I'm conceptually challenged :D

Ditto!

[1nfinity]

Ditto!!
I'm currently searching the IAP archives to garner what I can regarding techniques for segmenting, creating Celtic knots, etc., prior to the construction thereof.
Photos are very helpful, worth the effort, and appreciated.

[GaryMGg]

Randy,
The math makes perfect sense but holding small pieces like one will end up with
when cutting off the kerf of the second piece in step 3 requires hold-downs and
safety devices if someone is to keep all 10.
It's probably more effective to make a thin-strip ripping jig (plenty of those
have been posted on the 'net) and then make a kerf-thick template by finding the approriate thickness using trial-and-error and saving that for future use.

[Celt40]

Can you show how this is done with pictures. I am having trouble understanding what you mean. This is a question that i have always wondered How to get insert wood the exact size of kerf.

[airrat]

I have not done it yet but I saw at woodcraft a pack of thin wood, it looked to be the same kerf as a saw blade. I picked it up but do not remember where I put it due to the cancer. Let me look for it tomorrow and see if it is.

[Larry Gottlieb]

Clever method to get inserts of proper size.

I tried it and had some difficulty in sliding the inserts into the kerf.

Any help will be appreciated.

Larry

[rherrell]

I'm lucky enough to have a little 20" drum sander so it's a piece of cake. I can sand as thin as 1/32" and can take off .001" at a time if I want. If I didn't have the sander I believe I would opt for ripping a piece close on the table saw and using a card scraper to ease it down to the final width. A good sharp scraper will leave a clean surface and remove material pretty fast.