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Main Boards => The Bowyer's Bench => Topic started by: Kopper1013 on March 12, 2016, 09:53:00 AM

Title: Cutting limb profiles? (glass bow)
Post by: Kopper1013 on March 12, 2016, 09:53:00 AM
Just wondering what everyone's preferred method is?

Recently I saw a post where a guy uses a table saw to cut out his bow after glue up...I was interested cause I thought maybe a table saw blade might last longer? But then thought bandsaws seem more forgiving (blades don't move as fast and tend to be less aggressive).

So have you tried different ways?
What's YOUR preferred method?
Any trouble using a table saw?
Title: Re: Cutting limb profiles? (glass bow)
Post by: Krasus on March 12, 2016, 10:41:00 AM
Band saw then my 36" belt sander to final lines
Title: Re: Cutting limb profiles? (glass bow)
Post by: Trux Turning on March 12, 2016, 10:43:00 AM
I've done them both ways but my preferred method is to use my bandsaw.
Title: Re: Cutting limb profiles? (glass bow)
Post by: kennym on March 12, 2016, 11:01:00 AM
36 or 40 grit on a disc sander, then to the big belt to get good edge on limb.

15 minutes does it all.

I don't wanna subject my bandsaw/blades to glass cutting, probably baby it too much.  :D
Title: Re: Cutting limb profiles? (glass bow)
Post by: Roy from Pa on March 12, 2016, 11:41:00 AM
Ya otta put a pink apron on dat saw, Kenny...   :)
Title: Re: Cutting limb profiles? (glass bow)
Post by: Akbowman16 on March 12, 2016, 01:05:00 PM
Band saw to 1/16 - 1/8" (depending on how steady my hands are that day) then belt sand to the line for me.
Title: Re: Cutting limb profiles? (glass bow)
Post by: David Flanrey on March 12, 2016, 01:39:00 PM
I am with Kenny!!  A saw can destroy a limb quickly.  Also, you don't splinter the glass as badly with a sander.

And Roy, my saw is really old and probably needs crutches.   :laughing:    :laughing:
Title: Re: Cutting limb profiles? (glass bow)
Post by: kennym on March 12, 2016, 01:49:00 PM
Roy, I luv my bandsaw!  ;)
Title: Re: Cutting limb profiles? (glass bow)
Post by: Crooked Stic on March 12, 2016, 01:56:00 PM
Bandsaw -belt sander for me.
Title: Re: Cutting limb profiles? (glass bow)
Post by: takefive on March 12, 2016, 03:19:00 PM
I did it the way Kenny suggests on my one and only glass bow and it worked great.  Be sure to wear a good dust mask and long sleeved shirt.  I run my shop vac close to the disc, too.  Hope you're taking notes, Roy.   :D
Title: Re: Cutting limb profiles? (glass bow)
Post by: Mad Max on March 12, 2016, 03:31:00 PM
Quote
Originally posted by kennym:
36 or 40 grit on a disc sander, then to the big belt to get good edge on limb.

15 minutes does it all.

I don't wanna subject my bandsaw/blades to glass cutting, probably baby it too much.      :D    
X2  
a 4" hand held grinder
I go outside and grind mine
Title: Re: Cutting limb profiles? (glass bow)
Post by: Bowjunkie on March 12, 2016, 03:39:00 PM
I use the bandsaw, with a zero clearance blade plate to eliminate bottom tear out or splinters, cut just outside the line with a blade that has been adequately used, then go to the edge sander with 40 grit to flatten the edge. Takes just a couple of minutes.
Title: Re: Cutting limb profiles? (glass bow)
Post by: chackworth3 on March 12, 2016, 03:52:00 PM
I use an old blade on the table saw. Mark the limb profile and cut outside the lines. Just take it slow, give yourself room for error the first few times until you get the hang of it and wear long sleeves and a mask. I've never had an issue with it. Then I clean it up on the belt sander
Title: Re: Cutting limb profiles? (glass bow)
Post by: Bowjunkie on March 12, 2016, 06:31:00 PM
The reason I use the bandsaw and not the table saw is because seldom is my limb edge a straight line from dips to tips.
Title: Re: Cutting limb profiles? (glass bow)
Post by: Roy from Pa on March 12, 2016, 07:10:00 PM
I just make wood bows, so what do I know...
Title: Re: Cutting limb profiles? (glass bow)
Post by: Bowjunkie on March 12, 2016, 07:47:00 PM
Exactly.
Title: Re: Cutting limb profiles? (glass bow)
Post by: Roy from Pa on March 12, 2016, 08:02:00 PM
:)
Title: Re: Cutting limb profiles? (glass bow)
Post by: Robertfishes on March 12, 2016, 08:14:00 PM
I tried using a band saw with a carbide blade once, I just didn't like it, it didn't feel right to me.. I prefer to use a edge sander with a 36 belt to sand near the line then sand to the line with a 120 grit belt. I have a 6x80 belt sander but I used to use the Rigid oscillating belt sander with good success. A good dust collector, respirator and safety glasses should be used too
Title: Re: Cutting limb profiles? (glass bow)
Post by: Kopper1013 on March 12, 2016, 08:28:00 PM
Thanks guys for all the replies and info I guess on my next one I'll try my ridgid belt sander with some 36 grit then if I don't love it I'll try the table saw till I figure out what's easiest for me, I've just gone through to many band saw blades hahaha and Roy maybe some day when I actually understand the glass bows I can try a tri-lam but baby steps hahaha
Title: Re: Cutting limb profiles? (glass bow)
Post by: kennym on March 12, 2016, 08:31:00 PM
Just remember, glass dust is not good! Use a collector and a mask!
Title: Re: Cutting limb profiles? (glass bow)
Post by: Robertfishes on March 12, 2016, 09:26:00 PM
don't try to get too close to your lines with the 36 grit belt..its pretty rough and can leave some crazy hard to sand out "tool marks"..36 grit removes glass and wood quickly, I like to stop 1/8" before line, then go to the 120 grit belt. I used to use a 50 grit belt but switched to the 36 since its faster...some guys have awesome skills with table saws and band saws, I'm more comfortable with the edge sanders for removing material from limb edges.
Title: Re: Cutting limb profiles? (glass bow)
Post by: kennym on March 12, 2016, 09:34:00 PM
Robert is right, you can't put it back on once it's off!!   :scared:
Title: Re: Cutting limb profiles? (glass bow)
Post by: Sixby on March 14, 2016, 12:24:00 AM
Disk grinder as Kenny and then to the big belt sander.  I tape and center mark the tape top and belly of limb. Just set my micrometer to half and scripe light line down tape. That way I have a mid line to tiller too. I also have a thin three foot steel ruler I lay out my tapers with . I do not use a pattern. I lay out my notch and the taper length from there that I want. Then lay the ruler on the top, clamp it down with spring clamps and using a sharp knife cut the tape and remove the tape off of the part of the limb I am going to grind. I grind on the disk just so I can still see the glass, Take it to the line sander and grind to the tape.

God bless, Steve
Title: Re: Cutting limb profiles? (glass bow)
Post by: monterey on March 14, 2016, 02:45:00 AM
I tried putting an eight inch abrasive wheel on a table saw and found that to be a good solution.  

Steve, I like your system of cutting away the tape to the profile line, but what do you do if the profile lines are not straight?
Title: Re: Cutting limb profiles? (glass bow)
Post by: Bowlim on March 24, 2016, 02:31:00 PM
If it has fiberglass in it, I prefer not to grind it, might as well toss a bag of asbestos around the shop, you will be breathing it for the rest of your time in the shop.  I will do it outdoors, but even that doesn't thrill me.  A really sharp hand plane will make short work of it.  I use a bi-metal metal cutting bandsaw to rough it out, and I do that outdoors.  One needs to work from fat to thin to avoid blowing out glass.
Title: Re: Cutting limb profiles? (glass bow)
Post by: Wagstaff on March 24, 2016, 09:16:00 PM
We do it the same way Steve described.. Cut and remove the tape to the limb profile line.. Use the disc sander to get close, then belt sander to the line for a nice straight limb edge.
Title: Re: Cutting limb profiles? (glass bow)
Post by: Pago on March 24, 2016, 11:05:00 PM
Bandsaw then belt sander.