Consistent Facet Width Jig

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Wmcullen

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Dec 1, 2020
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Fairfax, Virginia
I'm not sure if this process is right or wrong; unique or common. But it works for me and I want to share in case it's interesting.​
24: Consistent Facet Width Jig
last post: 23- Pen Shaping: Wood/Nib Connection
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I put together a simple measuring jig to ensure consistent distances between my router table and pen blanks while making faceted pens.
The Problem
I was shocked at how small differences in the distance between my pen blank and the router bit had BIG consequences. Two setups I thought were similar yielded one pen that felt too thin while another felt too fat.

Solution
(Not rocket surgery, just how I did it.)
I constructed a jig to help me set up the router fence consistently.
pen24002.jpg

Process
1. I turned two hard maple blanks to about 0.5"
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2. Each blank was transferred onto an octagonal cutting guide and I used my new measuring jig to set up the router table.
More info about the octagonal cutting guide found here and at the end of the post.
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The jig mimics the width of the pen that will be cut. The changes are subtle but affect the "feel" of the pen immensely.
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pen24009.jpg


3. Once both pieces are cut, they are returned to the lathe for cleanup.
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Summary
I'm usually not overly concerned with consistency: I like that no two pens I make are the same.
But I felt too little control over the wild differences in my pen widths and needed to address it.
This system gives me back the control I'm looking for. It's not "hyper-exact" but brings things back within a tolerance I find comfortable.
pen24004.jpg


3D Models
A usable version of the octagonal jig can be found here.
I'm also attaching a simplified version as well as the measuring jig inside an attached zip file. called OctagonJig.zip.
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lorbay

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What are these?? Spacers?? Made from what. They look like slim line centre bands.
Lin
 

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Wmcullen

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Dec 1, 2020
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Location
Fairfax, Virginia
What are these?? Spacers?? Made from what. They look like slim line centre bands.
Lin
Hi Lin:
You nailed it. Since I usually try to make custom center bands out of scraps of wood I have an awful lots of the metal kit center bands laying around. I keep trying to figure out uses for them and spacers is about all I've come up with so far. Good eyes!
Cullen
 

KMCloonan

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Jun 13, 2017
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Round Lake, Illinois
Amazing blend of engineering and art. I had never thought to use my router table to facet a blank. Now it makes perfect sense. Also an excellent demonstration of the utility of having a 3D printer. Maybe I can leave this post up on my screen in the hopes my wife will wander by, read it, and say "I think you should get a 3D printer"

Thanks for sharing Cullen!
 

lorbay

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Joined
Jul 2, 2009
Messages
3,384
Location
BC. Canada
Hi Lin:
You nailed it. Since I usually try to make custom center bands out of scraps of wood I have an awful lots of the metal kit center bands laying around. I keep trying to figure out uses for them and spacers is about all I've come up with so far. Good eyes!
Cullen
I did this a few years back.
Lin
 

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