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Main Boards => The Bowyer's Bench => Topic started by: mwmwmb on June 22, 2009, 10:20:00 PM

Title: I am finally gonna do it and got some ??
Post by: mwmwmb on June 22, 2009, 10:20:00 PM

Okay, I am gonna start with a straight long bow and was thinking of keeping it kinda simple (Black glass and maple cores).

I am gonna do a band form like Apex, It looks like from the build alongs that folks just use a 2x8 screwed to another in L shape is that correct?  Also, do you need anthing on top of that before the lams like on the mdf forms with the thin metal strip. I know a pressure strip on top of lams but what about under?

Any tips on getting the fades paper thin?

i will probably add some more questions tommorow.

Thanks to all the guys on here with the how to's and build alongs and general help.
thanks bjansen for letting me borrow the binghams dvd

Title: Re: I am finally gonna do it and got some ??
Post by: mwmwmb on June 22, 2009, 10:21:00 PM

i will be billing the form this week and make an order from kenny later this week.

Title: Re: I am finally gonna do it and got some ??
Post by: bjansen on June 22, 2009, 10:47:00 PM

Your welcome sir.  Check out some of Apex's builds, he used a rounded strip on the top like to keep the pressure even on the lams (rather than have higher preasure on the edges).

As for the fades, put a block behind the riser and make sure you sand it flat and even on both sides.  Do a couple dry fits to see how the lams are mating up with your riser when you clamp it down.  I usually leave the fades 1/32 or so until the final fit, then grind them paper thin by just lightly touching it to the sander. Then one final dry fit and you should be good to go.  

Also, when building that form, I have been putting strips of rubber or cork on it too (cork being the make your own gasket cork rolls you get from autozone), which I think helps even out the pressure when clamped down.

Good luck

Title: Re: I am finally gonna do it and got some ??
Post by: Apex Predator on June 23, 2009, 07:23:00 AM

I glue a piece of thin aluminum to the form to even out the minute dips and bumps, and then glue a thin piece of rubber over that.  

For the fades, you want to use a "squared to your sander" piece of wood as a backing.  It's easier to get them thin if your sander is running off the end of the fades, when they start to get thin.  You have to keep your piece moving, and finish with light sanding pressure towards the end.  It helps to have a smooth surface under your work piece, so that you can move it smoothly, without hitches and hangups, which cause dips in your fades.

Title: Re: I am finally gonna do it and got some ??
Post by: dutchwarbow on June 23, 2009, 01:31:00 PM

marty, what type of adhesive do you use for glueing the aluminium/rubber ?

Nick

Title: Re: I am finally gonna do it and got some ??
Post by: Apex Predator on June 23, 2009, 02:43:00 PM

I use contact cement.  I was worried about it in the heat,but it's all clamped together while in the oven.  Never had a problem with it.

Title: Re: I am finally gonna do it and got some ??
Post by: mwmwmb on June 23, 2009, 06:51:00 PM

Thanks guys,

Also, is there a minium width for a cut to center on around 50lb bow?

Title: Re: I am finally gonna do it and got some ??
Post by: Apex Predator on June 23, 2009, 08:56:00 PM

I wouldn't worry about cutting it to center.  All my straight longbows are cut to within 1/8" of center.  It really depends on what your riser is constructed of.  I made one out of osage with no laminations and I could feel it flex ever so lightly.  Every one since then has been laminated in one form or another, and I have never had another flex.