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Foam Core Board Speaker Enclosures?
Foam Core Board Speaker Enclosures?
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Old 19th April 2019, 12:28 AM   #3061
CraigSu is offline CraigSu  United States
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I believe what you call a Stanley knife in the UK is referred to as a utility knife here in the US. If so, then I wouldn’t recommend it for the reasons you discovered.

This will do the job quite nicely:

Stainless Steel Snap-Off Graphics Knife (SAC-1) | OLFA - Craft OLFA – Craft
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Old 19th April 2019, 11:09 PM   #3062
xrk971 is offline xrk971  United States
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I use dollar store snap off utility knives too. For precise round or curved cuts I use x-acto pointy triangular blade.
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Old 20th April 2019, 12:28 PM   #3063
turk 182 is offline turk 182  Canada
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anyone have a solution for keeping the blade at 90 deg to the cut, my homebrew blocks/clamps aren't working for me in one way or another.
would a Dremel saw work? or would the spinning blade melt the foam?
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Old 18th May 2019, 05:52 PM   #3064
LiitleZamfir is offline LiitleZamfir  United Kingdom
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First attempt Quick and dirty,with 2 little kids "helping" . This really works to prevent woodwork perfectionism.
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Old 18th May 2019, 08:55 PM   #3065
xrk971 is offline xrk971  United States
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Quote:
Originally Posted by turk 182 View Post
anyone have a solution for keeping the blade at 90 deg to the cut, my homebrew blocks/clamps aren't working for me in one way or another.
would a Dremel saw work? or would the spinning blade melt the foam?
Cut with several 5-7 strokes each one a little deeper. Hold your blade at about 90deg and itís close enough as Board is only 3/16in thick. The glue will fill in the gaps.
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Old 18th May 2019, 09:09 PM   #3066
Cal Weldon is offline Cal Weldon  Canada
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Foam Core Board Speaker Enclosures?
Quote:
Originally Posted by turk 182 View Post
anyone have a solution for keeping the blade at 90 deg to the cut, my homebrew blocks/clamps aren't working for me in one way or another.
My most recent jig worked well. It was made with a table, a fence and two strips of metal for the blade guide.
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would a Dremel saw work? or would the spinning blade melt the foam?
Dremel, no I don't think so. I even tried a plywood blade both forward and reversed. No luck. It 'chunked' the foam like you see two posts up.
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Old 18th May 2019, 09:15 PM   #3067
CraigSu is offline CraigSu  United States
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Anybody try a hot knife? Even something as simple as just heating the craft knife or X-acto blade? I wonder if that would help clean up the foam edge.
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Old 18th May 2019, 09:16 PM   #3068
Cal Weldon is offline Cal Weldon  Canada
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LZ, looking forward to seeing the results.
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Old 18th May 2019, 09:17 PM   #3069
Cal Weldon is offline Cal Weldon  Canada
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Quote:
Originally Posted by CraigSu View Post
Anybody try a hot knife? Even something as simple as just heating the craft knife or X-acto blade? I wonder if that would help clean up the foam edge.
Edge is clean when cut with a sharp knife. I thought of hot wire cutting but there might be wobble and the heat is not what you want for the paper facer.
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Old 19th May 2019, 09:57 AM   #3070
turk 182 is offline turk 182  Canada
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Quote:
Originally Posted by Cal Weldon View Post
My most recent jig worked well. It was made with a table, a fence and two strips of metal for the blade guide.
any chance of a picture of your jig?
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