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Old 10-30-2008, 11:31 AM   #1
Nick P.
 
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Dojo: Sukagawa Aikido Club of Montreal
Location: Montreal
Join Date: Aug 2000
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How to cut/shape tatami?

Assume for a moment I purchase this tatami...

http://www.e-bogu.com/Martial_Arts_T...-tatmat2in.htm

Then, I need to cut/shape it to, say, get around a corner. How does one proceed?

Cut the cover, cut away and remove foam to approximate the shape, test for fit, trim excess cover, install? If so, how does one re-attach cut the cover for a nice finished edge? Expoxy, rubber glue, contact cement, etc?

Any insight appreciated. Thanks in advance.

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Old 10-30-2008, 11:48 AM   #2
Fred Little
Dojo: NJIT Budokai
Location: State Line NJ/NY
Join Date: Apr 2001
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Re: How to cut/shape tatami?

Start with a large cardboard box.

Cut box to match one-half tatami.

Measure the corner to be cut.

Mark the cut out on the cardboard.

Measure the corner to be cut again and check cardboard.

Cut cardboard to fit corner.

Check fit. Adjust with either additional small cuts or duct-tape additions as necessary.

Affix cardboard to end of tatami to be cut and use as pattern to cut tatami.

Remember, you can always cut more, but you can never cut less.

Good luck!

FL
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Old 10-30-2008, 12:04 PM   #3
Nick P.
 
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Re: How to cut/shape tatami?

Fred! You are the man!
I was looking at your home dojo pictures just last night...how ironic.

I would have thought wrapping the cover over the cut would help keep it looking good; guess not.

Next question: with what to cut? Big utility knife? Circular saw? Light saber?

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Old 10-30-2008, 12:37 PM   #4
Fred Little
Dojo: NJIT Budokai
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Re: How to cut/shape tatami?

Quote:
Nick Pittson wrote: View Post
Fred! You are the man!
I was looking at your home dojo pictures just last night...how ironic.

I would have thought wrapping the cover over the cut would help keep it looking good; guess not.

Next question: with what to cut? Big utility knife? Circular saw? Light saber?
Nick, there's always room for improvement of somebody else's method.

If you're concerned about a clean corner and want the cover to wrap, then cut from the underside. (Be careful not to reverse your guide pattern) Don't cut quite all the way through (if you use an extendible snap-blade knife, you can control the depth of the cut by setting the length of the blade) but overlap the two cuts on the inside corner. Snap the foam along the cut and peel the foam off the vinyl cover.

What works really, really well (if a) you're not concerned about cutting through the vinyl and b) you have a way to raise the tatami off the floor while it's being cut) is a stainless steel serrated bread knife. Otherwise, I'd go with a snap-blade utility knife, the wider the blade the better.

Good luck!

FL
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Old 10-30-2008, 01:04 PM   #5
Nick P.
 
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Re: How to cut/shape tatami?

Most appreciated and thank you.

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Old 10-31-2008, 08:39 AM   #6
jimbaker
Dojo: Aikido of Norfolk/ Aikido Society of Memphis
Location: Norfolk, VA
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Re: How to cut/shape tatami?

If it's a zebra type mat, they have a procedure for cutting and folding the edge. Worked for us.
http://www.zebramats.com/trim.html

Jim Baker
Aikido of Norfolk
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Old 10-31-2008, 11:45 AM   #7
Nick P.
 
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Re: How to cut/shape tatami?

Thanks Jim, also most helpful.

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Old 10-31-2008, 11:49 AM   #8
Howard Popkin
Dojo: Popkin-Brogna 大東流合気柔術銀柔会
Location: Long Island, NY
Join Date: Jan 2007
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Re: How to cut/shape tatami?

Utility knives wren't good, but a 10 dollar russel-dexter filet knife used by fisherman did the job perfectly.

Bring a stone and sharpen it when it dulls.

Always need some connection with the fishing

Good luck !

Howard
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