Author Topic: Board Pricing  (Read 26697 times)

Offline Viagara

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Re: Board Pricing
« Reply #15 on: December 03, 2007, 11:57:02 AM »
Okay, if I start asking question in a thread like this, you should know it would be a stupid question ;D

What is CNC cutting? I am thinking of replacing the frame of the my Maggies which is basically a rectangular frame(19mm thick) with a machined hole for the crossover at the bottom. Now would that have to cut utilising CNC?

My intention is to have each frame(1220 x 600mm) made out of a single piece of MDF i.e. no glueing of seperate pieces of wood.
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Offline GearSlave

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Re: Board Pricing
« Reply #16 on: December 03, 2007, 12:04:25 PM »
It'll be quite a bit of a waste trying to do those frames in one piece of wood. Personally, I would make the frame out of a decent hardwood. Making it out of MDF might not give you the strength you need.

CNC cutting is just an automated process for getting repeatable cuts that'll be hard (or impossible) to do manually. This is driven by some CAD program that has a copy of the original design.

For what you want to do, CNC cutting is not required. The chamber for the XO can easily be machined with any router. Take Byrd up on his offer to come have a look at what you have. Giving him half (of the part that he will inevitably saw off  ;D) is a small price to pay ;D ;D
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Offline Viagara

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Re: Board Pricing
« Reply #17 on: December 03, 2007, 12:22:59 PM »
Thanks Gert, now I understand what CNC cutting is ;)

Do you think something like Maranti would do the trick?
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Offline The Godfather

Re: Board Pricing
« Reply #18 on: December 03, 2007, 12:31:39 PM »
LOL - Yeah I want my pound of flesh / piece of speaker.

But seriously. I am busy doing my Thors at the moment so the equipment is going to be out and the dust will be all over my garden so if you decide to go the MDF route - come join the fun :).

Cutting those frames should not take more than 2 hours I am sure.

The closest you will get to the 19mm (That is american 3/4 inch) is 18mm or you may go for 22mm. (Not sure on the exact design of the panels so you will need to judge if that width is acceptable.

I imagine using hardwoods would be cheaper though, but then you need to use proper joinery, I don't think butt joints would cut it.

Offline Viagara

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Re: Board Pricing
« Reply #19 on: December 03, 2007, 12:34:50 PM »
I will do some more precise measuring to determine the exact thickness required.
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Offline GearSlave

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Re: Board Pricing
« Reply #20 on: December 03, 2007, 01:14:07 PM »
Thanks Gert, now I understand what CNC cutting is ;)

Do you think something like Maranti would do the trick?

I'm afraid I'm not that clued up when it comes to the different woods. Logic tells me to agree with Byrd, in that the type of wood will be less important than the way they joined. In fact, I would think that you would be better off making 'L' shaped brackets (like they do with heavy picture frames) in addition to the mitred joins.

Just my 2c
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Offline Viagara

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Re: Board Pricing
« Reply #21 on: December 03, 2007, 01:45:34 PM »
In fact, I would think that you would be better off making 'L' shaped brackets (like they do with heavy picture frames) in addition to the mitred joins.

Just my 2c

2c appreciated :D I was thinking along those lines if I were to go for wood. Maranti as far as I can remember is classified as a hardwood and will probably do the trick.
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Offline The Godfather

Re: Board Pricing
« Reply #22 on: December 03, 2007, 02:00:22 PM »
Meranti is one of the harder woods, much harder than pine for example.

Jus tto be clear when I said 18mm I was refering only to MDF. Meranti you can have cut to whatever size (Within reason)

The kind of joint I would use if building a frame out of seperate pieces of wood would be a corner bridle joint

http://en.wikipedia.org/wiki/Bridle_joint


Offline Shonver

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Re: Board Pricing
« Reply #23 on: December 03, 2007, 02:13:47 PM »
I would use marine ply, as it is more stable than MDF and perhaps even hardwood. It is also more rigid. From what I've seen the frames are hidden(?). I'd use balcotan to glue the pieces together.
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Offline Viagara

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Re: Board Pricing
« Reply #24 on: December 03, 2007, 02:52:54 PM »
As you mentioned Shaun, the frame is hidden in a "sock" with only an Oak strip attached so each side.
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