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Main => Woodworking => Topic started by: Numbski on November 05, 2008, 12:14:24 pm

Title: What's the best way to round or "scallop" a control panel top?
Post by: Numbski on November 05, 2008, 12:14:24 pm
So I'm finally getting around to re-doing my control panel this weekend.  Making some tweaks to the box, and completely re-doing the top.

One of the things I screwed up badly the first time around was the corners.  I just took a glass, traced the bottom around the corners where they intersected, and cut.  Not the most scientific way to do it, and the results were *terrible*.

The only thing I can thing to do is drill a small pilot hole, and I have a circle cutting attachment for my roto-zip rotary saw, and just use that as though I were cutting a full circle, but just cut the rounded edges.  Is there a better way to attack this?
Title: Re: What's the best way to round or "scallop" a control panel top?
Post by: javeryh on November 05, 2008, 12:16:51 pm
How big of a curve? 

I would draw the arc out on a piece of MDF, cut it and sand to the line and then use that piece as a template with my router for all of the corners.
Title: Re: What's the best way to round or "scallop" a control panel top?
Post by: Numbski on November 05, 2008, 12:54:34 pm
Not sure how big I want to do.  Here's a shot of the last attempt (early shot, ignore the fugly wannabe CPO):

(http://wiki.arcadecontrols.com/w/images/thumb/b/b1/Numbski-cabinet.jpg/400px-Numbski-cabinet.jpg)
Title: Re: What's the best way to round or "scallop" a control panel top?
Post by: ChadTower on November 05, 2008, 01:02:19 pm
How big of a curve? 

I would draw the arc out on a piece of MDF, cut it and sand to the line and then use that piece as a template with my router for all of the corners.


That's the way to go right there.
Title: Re: What's the best way to round or "scallop" a control panel top?
Post by: Numbski on November 05, 2008, 01:05:35 pm
So get an extra big flush-trim bit then?  Take a scrap piece of 5/8" board, cut my curve there, then clamp or screw that to the work piece, and flush-trim bit the thing?
Title: Re: What's the best way to round or "scallop" a control panel top?
Post by: Franco B on November 05, 2008, 01:18:21 pm
If you can find a vegetable/processed food can with the right radius you could cut around the side of the can about 3/4" from the bottom and then screw that to the CP top to use as a template for your router to follow. Should give you a perfect curve.


 
Title: Re: What's the best way to round or "scallop" a control panel top?
Post by: shiloh on November 05, 2008, 01:21:47 pm
How big of a curve? 

I would draw the arc out on a piece of MDF, cut it and sand to the line and then use that piece as a template with my router for all of the corners.

I am redoing my CP and that's how I plan to do it too.

One question: is worth getting a belt sander to sand the curves or elbow grease will do it?
Title: Re: What's the best way to round or "scallop" a control panel top?
Post by: ChadTower on November 05, 2008, 02:06:52 pm

If you want to be that exact I wouldn't use a belt sander... one moment leaning too hard and now you have to fill it.  They eat stuff fast.  I'd cut it close and use a palm sander with like 80 grit.
Title: Re: What's the best way to round or "scallop" a control panel top?
Post by: javeryh on November 05, 2008, 02:37:07 pm
If you can find a vegetable/processed food can with the right radius you could cut around the side of the can about 3/4" from the bottom and then screw that to the CP top to use as a template for your router to follow. Should give you a perfect curve.

That's a great idea too - or at least use it to make the template.

I would NOT use a belt sander.  MDF sands super easy by hand.
Title: Re: What's the best way to round or "scallop" a control panel top?
Post by: Numbski on November 05, 2008, 03:01:33 pm
I like the can idea.  I think I'll give that a shot! :)
Title: Re: What's the best way to round or "scallop" a control panel top?
Post by: fjl on November 14, 2008, 02:57:26 am
My mom told me that pointing is rude.  :-\