Acetate spectacle frame. - Router Forums
 
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post #1 of 5 (permalink) Old 02-14-2012, 11:12 AM Thread Starter
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Default Acetate spectacle frame.

Hello,
I'm making an acetate spectacle frame, I'm stuck on how to put the groove inside the rim/aperture to hold the lens. Does anyone know of a solution? Would a woodworking router be the answer? This is only an interest not a commercial operation, I can't buy a spectacle making machine just to make one or two frames.
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post #2 of 5 (permalink) Old 02-15-2012, 10:47 AM
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If the eyeglass frame is perfectly flat (maybe to be shaped in a later manufacturing step) you might be able to use a router with a slot cutter bit having just the right size guide bearing to get the very shallow depth of cut. You would need to mount the router in a table with a hole just large enough for the bit to clear and, using an appropriate holder for the acetate frame, guide the frame around the router bit and against the bearing guide. A very small bit in a small router would be required to do this, possibly a Dremel type tool. I have never tried to rout a slot this small. It will take some experimenting.

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post #3 of 5 (permalink) Old 02-15-2012, 11:26 AM
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David, I used to work for DOC Optics Corp. in their machine repair department. Custom frame work was done with a Proxxon precision mini router. A tiny Dremel style slot cutter is used to cut a small dado in both the frame and lense and a plastic or nylon line is inserted in the dado very similar to a floating tenon. Ultra light weight fishing line works for this.

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post #4 of 5 (permalink) Old 02-20-2012, 04:20 AM Thread Starter
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Originally Posted by Mike View Post
David, I used to work for DOC Optics Corp. in their machine repair department. Custom frame work was done with a Proxxon precision mini router. A tiny Dremel style slot cutter is used to cut a small dado in both the frame and lense and a plastic or nylon line is inserted in the dado very similar to a floating tenon. Ultra light weight fishing line works for this.
Thanks Mike, that type of frame that you describe sounds interesting. Would it be what we call a Nylor Supra where one has only half a frame, the lens being held in by a nylon cord, fishing line as you say? Thanks again for your post.
Cheers,
David.
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post #5 of 5 (permalink) Old 02-20-2012, 04:24 AM Thread Starter
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Originally Posted by CharleyL View Post
If the eyeglass frame is perfectly flat (maybe to be shaped in a later manufacturing step) you might be able to use a router with a slot cutter bit having just the right size guide bearing to get the very shallow depth of cut. You would need to mount the router in a table with a hole just large enough for the bit to clear and, using an appropriate holder for the acetate frame, guide the frame around the router bit and against the bearing guide. A very small bit in a small router would be required to do this, possibly a Dremel type tool. I have never tried to rout a slot this small. It will take some experimenting.

Charley
Many thanks for your response to my query Charley, it's helpful. I was thinking that probably my best course of action would be a Dremel, with a bit of care I should be able to achieve what I'm aiming for, thanks again.
Cheers,
David.
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