To Pecker, Bill, Bob, and others......

[johnnail]

Hi Guys,

A solid "Thanks" goes out to all who posted responses about the pyramidal cutting problem....and a special thanks goes to Pecker for the link to the Polycut.exe program. That rocks.
I had some boogered scraps laying around from previous attempts at the truncated pyramid. Took them and used them for some practice cuts. That program is right on the money. I set the miter gauge and blade tilt exactly to what was suggested and got a really nice mitered fit to a four-sided pyramid...all sides sloped in at 15 degrees. Today I try to do one that has fronts/backs tilted 15 degrees , sides tilted 12 degrees. This is the specified angle to the WATT monitor that I have been wanting to build, but putting off for more than 4 years.
I actually got those angles from a real, live WATT series 6. ACtually, the rear wall is 7.5 degrees, with side panels overlapping past for the tubular handle in the rear...but hey...it's gonna be complicated enough with that. I have no pictures of the earlier WATT 3 or 4, so don't know if they had the handle then or not. I am wanting to recreate the WATT version that last used the SEAS CA17RCY driver in conjunction with the Focal Titanium tweeter....both units of which I have located and procured. (Thanks Bill Horn, and Andy DeGraaf)
I also plan on altering the cuts to include a mitered top panel. I pretty much got that one figured out....I think.

Thanks again, guys.

John

[biff]

> Hi Guys,

> A solid "Thanks" goes out to all
> who posted responses about the pyramidal
> cutting problem....and a special thanks goes
> to Pecker for the link to the Polycut.exe
> program. That rocks.
> I had some boogered scraps laying around
> from previous attempts at the truncated
> pyramid. Took them and used them for some
> practice cuts. That program is right on the
> money. I set the miter gauge and blade tilt
> exactly to what was suggested and got a
> really nice mitered fit to a four-sided
> pyramid...all sides sloped in at 15 degrees.
> Today I try to do one that has fronts/backs
> tilted 15 degrees , sides tilted 12 degrees.
> This is the specified angle to the WATT
> monitor that I have been wanting to build,
> but putting off for more than 4 years.
> I actually got those angles from a real,
> live WATT series 6. ACtually, the rear wall
> is 7.5 degrees, with side panels overlapping
> past for the tubular handle in the
> rear...but hey...it's gonna be complicated
> enough with that. I have no pictures of the
> earlier WATT 3 or 4, so don't know if they
> had the handle then or not. I am wanting to
> recreate the WATT version that last used the
> SEAS CA17RCY driver in conjunction with the
> Focal Titanium tweeter....both units of
> which I have located and procured. (Thanks
> Bill Horn, and Andy DeGraaf)
> I also plan on altering the cuts to include
> a mitered top panel. I pretty much got that
> one figured out....I think.

> Thanks again, guys.

> John

My project was inadvertently concealing the small open gap behind the prerabbeted edges. When I get ready to cut the back panel that program will come in very handy. Thanks John for bringing it up. 35 years since the last math class apparently left some dust and loose connections.

[johnnail]

> Hi Guys,

> A solid "Thanks" goes out to all
> who posted responses about the pyramidal
> cutting problem....and a special thanks goes
> to Pecker for the link to the Polycut.exe
> program. That rocks.
> I had some boogered scraps laying around
> from previous attempts at the truncated
> pyramid. Took them and used them for some
> practice cuts. That program is right on the
> money. I set the miter gauge and blade tilt
> exactly to what was suggested and got a
> really nice mitered fit to a four-sided
> pyramid...all sides sloped in at 15 degrees.
> Today I try to do one that has fronts/backs
> tilted 15 degrees , sides tilted 12 degrees.
> This is the specified angle to the WATT
> monitor that I have been wanting to build,
> but putting off for more than 4 years.
> I actually got those angles from a real,
> live WATT series 6. ACtually, the rear wall
> is 7.5 degrees, with side panels overlapping
> past for the tubular handle in the
> rear...but hey...it's gonna be complicated
> enough with that. I have no pictures of the
> earlier WATT 3 or 4, so don't know if they
> had the handle then or not. I am wanting to
> recreate the WATT version that last used the
> SEAS CA17RCY driver in conjunction with the
> Focal Titanium tweeter....both units of
> which I have located and procured. (Thanks
> Bill Horn, and Andy DeGraaf)
> I also plan on altering the cuts to include
> a mitered top panel. I pretty much got that
> one figured out....I think.

> Thanks again, guys.

> John
Hi all,

Yesterday, I did a few test cuts on scraps....they turned out so good, but a little narrow....but man, I hate to toss them as practice. So..I dug around and came up with another pair of NHT Superzero woofers (4.5" paper) and a spare pair of 1" tweeters with 3.5" faceplates. It is a little close, but my mock-up shows they will fit.... And so, I did up a cabinet simulation and adjusted the volume to accomodate the drivers...ended up making another 4 panels this morning...longer, but with same height and angle. I also recut the top edge angle to a back-cut 30 degrees, so now I can add a mitered top panel. I mocked up all 4 sides with the other four panels from yesterday and everything fit perfectly! Success! WhaHooo!!!!
I have to cut the tops yets, and the bottoms, but this speaker will end up being a "mini-Me" version of a WATT...if only in cabinet design. Something different than the regular rectangles I been building for so long. I am so excited I could bust. This has taken me a long time to get things accurate, true, get skills honed...etc...and the little Polycut program was the final piece of the puzzle. WATTs, here we come.

Best regards to all,

One happy camper....John

[Pete Schumacher ®]

[Pete Schumacher ®]

[Andy_G]

About time you learnt to cut crooked ;-))

Well done :-))

[Wolf]

I used a dado-biscuit arrangement. The hardboard helped to line everything up. I glued the port to the inside of the rear before assembly, then flush-routed through the baffle post glue-up.
Later,
Wolf

[Andy_G]

> I used a dado-biscuit arrangement. The
> hardboard helped to line everything up. I
> glued the port to the inside of the rear
> before assembly, then flush-routed through
> the baffle post glue-up.
> Later,
> Wolf

Me, I can't set the blade to a specific angle, all the dials on the old radial arm saw have long since disappeared. I just grab scrap pieces of mdf and alter the angles until things fit properly, beauty of a RAS is that you can easily trim like 1/2mm off a cut without a problem.

[Wolf]

> Me, I can't set the blade to a specific
> angle, all the dials on the old radial arm
> saw have long since disappeared. I just grab
> scrap pieces of mdf and alter the angles
> until things fit properly, beauty of a RAS
> is that you can easily trim like 1/2mm off a
> cut without a problem.

I used a table saw.
Later,
Wolf

[JRT]

> Me, I can't set the blade to a specific
> angle, all the dials on the old radial arm
> saw have long since disappeared. I just grab
> scrap pieces of mdf and alter the angles
> until things fit properly, beauty of a RAS
> is that you can easily trim like 1/2mm off a
> cut without a problem.

You ought to be able to find a made in China protractor on the cheap, like the one pictured below.

[Andy_G]

> You ought to be able to find a made in China
> protractor on the cheap, like the one
> pictured below.

Oh ok, I admit I own a bevel square, but it doesn't have a fancy dial like that .. Cool !!!

Might look in Bunnings next time I'm in there !!

[kenmcculloch]

> I used a dado-biscuit arrangement. The
> hardboard helped to line everything up. I
> glued the port to the inside of the rear
> before assembly, then flush-routed through
> the baffle post glue-up.
> Later,
> Wolf

Reminds me of the great line "If we only knew how he did it?". Then Gene Wilder finds the book entitled "How I Did It" by Victor Von Frankenstein. Or is it Frankenstine?

Good thinking!

[dB]

[Pete Schumacher ®]

[dB]

[Pete Schumacher ®]

Check for John Nail's post:

calculating angle for cuts.....help