Small Angles with a Circular Saw

Helpful hints on how to build 'em, and where to get the stuff you need.
Post Reply
Message
Author
User avatar
David Carter
Posts: 1824
Joined: Mon Jan 01, 2007 7:20 am
Location: (East) Tennessee, USA

Small Angles with a Circular Saw

#1 Post by David Carter »

How do those of you who use a circular saw cut angles like 3 degrees, etc.? Do you try to be precise or do you just approximate and let PL do the rest? I'm asking for SONIDO TUMBAO who's trying to figure out the best way to cut the angles required for a T48 build but didn't feel he could explain himself clearly in English.

One method he's been wondering about is using the sketchup model to determine the length of the top and bottom faces of the panel, marking his boards according to those measurements, and then trying to eyeball the angle on his circular saw to match. Thoughts? Suggestions?
Dave

Built:
- Omni 10 (S2010 + piezo array)
- 2 x DR250 (DL II 2510 + melded array)
- 2 x Titan 39 (BP102 - 14"W)
- 2 x Titan 39 (3012LF - 20"W)
- 4 x DR200 (Delta Pro 8B + melded array)

User avatar
Scott Brochu
Posts: 2473
Joined: Sat Mar 10, 2007 11:53 pm
Location: Maine
Contact:

Re: Small Angles with a Circular Saw

#2 Post by Scott Brochu »

David Carter wrote:How do those of you who use a circular saw cut angles like 3 degrees, etc.? Do you try to be precise or do you just approximate and let PL do the rest? I'm asking for SONIDO TUMBAO who's trying to figure out the best way to cut the angles required for a T48 build but didn't feel he could explain himself clearly in English.

One method he's been wondering about is using the sketchup model to determine the length of the top and bottom faces of the panel, marking his boards according to those measurements, and then trying to eyeball the angle on his circular saw to match. Thoughts? Suggestions?
Personally I don't think it matters with a degree that small, and ya the PL would fill the gap.
I wouldn't glue that peice first though incase you glue at the wrong angle. I would glue the peice that conects to that 3 degree cut peice first so it has a proper place to rest.
Or...you said it was a T 48 just make sure you follow the lines drawn out on one of the sides when glueing.

Although with cabinetry it is precise, measure twice, cut once. :P
Drumming is a way of life.
ME LIKE TO HIT THINGS!
http://billfitzmaurice.info/forum/viewt ... 26&t=11232

User avatar
LelandCrooks
Posts: 7242
Joined: Thu May 04, 2006 9:36 am
Location: Midwest/Kansas/Speaker Nirvana
Contact:

Re: Small Angles with a Circular Saw

#3 Post by LelandCrooks »

Tell him not to bother with the 3deg. Just sand it to the angle, rather than cut it. I don't think he has PL, but he could caulk the joint after gluing.
If it's too loud, you're even older than me! Like me.
http://www.speakerhardware.com

User avatar
Israel
Posts: 586
Joined: Sat Aug 22, 2009 9:43 am
Location: Moca Puerto Rico

Re: Small Angles with a Circular Saw

#4 Post by Israel »

it is easier to round degrees with a circular saw i round in 5 degree increments each 5 degrees is little less than 1/16 in gap and i also agree that it is better off sanding it. To explain it neat if i need to cut a 12 degree angle I made a 10 degree cut with the circular saw and sand the rest. ofcourse i did it a few times before realze that i need a table saw
There is a very thin line between fail and success. It is very thin so, why are you scared???


MADE
4- OT12'S BETAII
4 T39'S 20" 3012LF LOADED
ON THE BENCH: 2 OT212

User avatar
Scott Brochu
Posts: 2473
Joined: Sat Mar 10, 2007 11:53 pm
Location: Maine
Contact:

Re: Small Angles with a Circular Saw

#5 Post by Scott Brochu »

Israel wrote:ofcourse i did it a few times before realze that i need a table saw
You don't need one but it sure makes life a lot easier when cutting. :mrgreen:

If you can show pictures of your build and we can help you out, and point out things you might miss. It's a lot easier to get problems fixed now than later. :wink:
Drumming is a way of life.
ME LIKE TO HIT THINGS!
http://billfitzmaurice.info/forum/viewt ... 26&t=11232

User avatar
Tom Smit
Posts: 7569
Joined: Sat Jan 05, 2008 1:24 pm
Location: Sarnia, Ont. Canada

Re: Small Angles with a Circular Saw

#6 Post by Tom Smit »

I use this one... http://www.amazon.com/General-Tools-Pla ... B00004T7P5 and it is dirt cheap! I set it on the saw bed, and against the blade. Then I adjust the bed to the angle desired.
As mentioned, PL will fill for a square cut (if PL is available).
TomS

User avatar
David Carter
Posts: 1824
Joined: Mon Jan 01, 2007 7:20 am
Location: (East) Tennessee, USA

Re: Small Angles with a Circular Saw

#7 Post by David Carter »

tammojsmit wrote:I use this one... http://www.amazon.com/General-Tools-Pla ... B00004T7P5 and it is dirt cheap! I set it on the saw bed, and against the blade. Then I adjust the bed to the angle desired.
I have that gadget also, but I'm having trouble picturing what you are describing. Any chance you could post a pic?
Dave

Built:
- Omni 10 (S2010 + piezo array)
- 2 x DR250 (DL II 2510 + melded array)
- 2 x Titan 39 (BP102 - 14"W)
- 2 x Titan 39 (3012LF - 20"W)
- 4 x DR200 (Delta Pro 8B + melded array)

Gregory East
Posts: 3495
Joined: Sat May 13, 2006 9:56 pm

Re: Small Angles with a Circular Saw

#8 Post by Gregory East »

He's talking about a circular saw. He adjusts the bottom plate angle using the gadget.

User avatar
David Carter
Posts: 1824
Joined: Mon Jan 01, 2007 7:20 am
Location: (East) Tennessee, USA

Re: Small Angles with a Circular Saw

#9 Post by David Carter »

Yes, I know we're talking about a circular saw. I just couldn't picture how you could set it against the blade. But now I think I get it. I would adjust the blade depth so that it protrudes as far as possible below the shoe, and then place the protractor against the shoe and the blade. Right?
Dave

Built:
- Omni 10 (S2010 + piezo array)
- 2 x DR250 (DL II 2510 + melded array)
- 2 x Titan 39 (BP102 - 14"W)
- 2 x Titan 39 (3012LF - 20"W)
- 4 x DR200 (Delta Pro 8B + melded array)

Gregory East
Posts: 3495
Joined: Sat May 13, 2006 9:56 pm

Re: Small Angles with a Circular Saw

#10 Post by Gregory East »

I am confused by your confusion. You got it.

User avatar
Tom Smit
Posts: 7569
Joined: Sat Jan 05, 2008 1:24 pm
Location: Sarnia, Ont. Canada

Re: Small Angles with a Circular Saw

#11 Post by Tom Smit »

In the picture in the link, the gauge is at approxiametly 60 degrees. Therefore, if the bottom of the gauge is on the bed, tilt the bed until the blade meets the side exactly. Then the blade will cut at a 60 degree angle.
For a different angle, set the gauge to the desired number of degrees, and tilt the bed so that the blade meets it again.

Hope that is clearer!
TomS

User avatar
DrDoug018
Posts: 222
Joined: Fri Jun 30, 2006 11:51 am
Location: Dublin, OH

Re: Small Angles with a Circular Saw

#12 Post by DrDoug018 »

tammojsmit wrote:I use this one... http://www.amazon.com/General-Tools-Pla ... B00004T7P5 and it is dirt cheap! I set it on the saw bed, and against the blade. Then I adjust the bed to the angle desired.
As mentioned, PL will fill for a square cut (if PL is available).
My approach is "Why use an inexpensive straight-forward tool when much more expensive and complicated options are available?"
level.jpg
I have both but it is just so much more rewarding to use a phone to build a speaker. :ugeek:

Doug

2 DR250
2 T39 (20" 3012LF)
2 Jack 10
1 Omni 10

Post Reply