Author Topic: MFT Jig Puzzle  (Read 9495 times)

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Offline Jesse Cloud

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MFT Jig Puzzle
« on: July 27, 2010, 10:56 AM »
A buddy came into my shop the other day and thought this jig was the craziest thing he had ever seen, but when I told him what it does, he took a picture so he could use it at his shop...

Can you guess what it does?  Hint: I'm making chairs.

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I'll post the answer tomorrow.

Offline dsweetser

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Re: MFT Jig Puzzle
« Reply #1 on: July 27, 2010, 11:57 AM »
No idea Jesse, but I'd love to see more shots of your shop.

Don
Don

Offline David

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Re: MFT Jig Puzzle
« Reply #2 on: July 27, 2010, 12:13 PM »
I like that ball on the end of the rail. It makes me think you've encountered sensitive parts of your body with that rail from time to time and finally got tired of it. :)
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Offline Jesse Cloud

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Re: MFT Jig Puzzle
« Reply #3 on: July 27, 2010, 01:05 PM »
I like that ball on the end of the rail. It makes me think you've encountered sensitive parts of your body with that rail from time to time and finally got tired of it. :)
You got that right!  Cheapest rubber ball I could find at Walgreen's.  Best investment I've ever made.

Offline Jesse Cloud

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Re: MFT Jig Puzzle
« Reply #4 on: July 27, 2010, 01:06 PM »
No idea Jesse, but I'd love to see more shots of your shop.

Don
Hey Don,
As you can tell, the shop needs a good cleaning before I take shots.  After I finish this batch of chairs maybe. [laughing]
Jess

Offline Wood_Junkie

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Re: MFT Jig Puzzle
« Reply #5 on: July 27, 2010, 01:14 PM »
Sort of a story stick for setting seat height?

Offline woodguy7

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Re: MFT Jig Puzzle
« Reply #6 on: July 27, 2010, 01:47 PM »
What about some pics of finished chairs   [big grin]

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Offline RL

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Re: MFT Jig Puzzle
« Reply #7 on: July 27, 2010, 02:22 PM »
Is it to support the seat whilst you are assembling or gluing? It looks about the same distance as would be typical from the seat to the floor.

Richard.

Offline PaulMarcel

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Re: MFT Jig Puzzle
« Reply #8 on: July 27, 2010, 04:06 PM »
A third hand during assembly; you clamp legs/back to the vertical to hold them there while you finish the assembly.

I like the cabinets in the background.  Look like spalted maple with big trunk hinges.
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Offline Chris Hughes

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Re: MFT Jig Puzzle
« Reply #9 on: July 27, 2010, 10:57 PM »
Get rid of the ball and get a longer table. [tongue]

Offline Corwin

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Re: MFT Jig Puzzle
« Reply #10 on: July 27, 2010, 11:04 PM »
I like that ball on the end of the rail. It makes me think you've encountered sensitive parts of your body with that rail from time to time and finally got tired of it. :)

I prefer to think of tennis when I hear the expression, "the ball's in your court."       [scared]
Looks like your rabbit joint is a hare off! ;)

Offline Kevin D.

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Re: MFT Jig Puzzle
« Reply #11 on: July 27, 2010, 11:36 PM »
I've never made chairs, but here goes.  It's for removing the seat off after a dry fit.
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Offline RonWen

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Re: MFT Jig Puzzle
« Reply #12 on: July 28, 2010, 12:07 AM »
I'm going with the "third hand for assembly" idea and the three sided shelf comes into play also somehow -- it's on the wrong end of the MFT (& backward?) for a saw rest.

Offline Rob-GB

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Re: MFT Jig Puzzle
« Reply #13 on: July 28, 2010, 01:59 AM »
Is it to rest the stool seat on so the bottoms of the legs can be scribed to the flat MFT/3 surface?
For chairs with a slope to the rear is there an add on piece?
Rob.
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Offline Jesse Cloud

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Re: MFT Jig Puzzle
« Reply #14 on: July 28, 2010, 10:27 AM »
Lots of good answers!  Rob-GB's was the most complete.

When I make a chair, I finish and glue up the rear assembly (rear legs, rear stretcher, back splat or spindles).   There are lots of tricky compound angles in most chairs.  The rear legs splay outwards for stability.  The back of the chair seat is lower than the front for comfort.  Half a degree off here or there can make a big gap, so I cut the last pieces to fit.

The jig holds the finished rear assembly vertical with the front legs and stretchers dry fit.  I then fit the front stretcher to the gap between the front legs and scribe the front legs against the edge of the mft to find the final length of the legs.
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All the joinery is done while the pieces are square or rough.  After a successful dry fit, I will finish the pieces, glue the front assembly up and then glue the assemblies together with the side stretcher.  Then corner blocks, a slip seat, and leather upholstery and I'm done.... some day ;)

Thanks for playing the puzzle - great answers.

Offline David

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Re: MFT Jig Puzzle
« Reply #15 on: July 28, 2010, 11:20 AM »
So if we wanted to really mess with your sanity, we could slip into your garage and move something a cm or two.  [big grin]
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Offline Chris Meggersee

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Re: MFT Jig Puzzle
« Reply #16 on: July 28, 2010, 12:00 PM »
So if we wanted to really mess with your sanity, we could slip into your garage and move something a cm or two.  [big grin]

Ooh, thats evil. I love it! Lets move it off by 1/2 a degree? [big grin]
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Offline woodguy7

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Re: MFT Jig Puzzle
« Reply #17 on: July 28, 2010, 01:30 PM »
Jesse, that a sweet looking chair..  The back slat, is it laminated ?  If so i presume the inside lamination's are maple & the 2 outside lamination's a figured maple like burl or sumthing.  Do you do the upholstery & leather yourself ?

Lovely chair & would love to see a finished product,

Woodguy.
If its made of wood, i can make it smaller.
Shirt size medium
p.s- ive started reading these too

Offline Jesse Cloud

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Re: MFT Jig Puzzle
« Reply #18 on: July 28, 2010, 03:15 PM »
@Chris and David - you guys are evil! ;)

@Woodguy - Yes, the backsplat is laminated.  Plain maple in the middle, curly maple veneer on the show faces.  The interesting part was getting the negative space in the curved piece.  I used the template for the laminating form to make a 'cutting board' with the same shape, made a router guide out of a scrap piece of laminated curve and routed it with a couple of different sized bits.   I will do the upholstery myself on this one, just a simple slip seat.  Will take pics if anyone is interested, the good part is that there is no sewing, just a cool air stapler.

Thanks for looking.
Jess

Offline woodguy7

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Re: MFT Jig Puzzle
« Reply #19 on: July 28, 2010, 05:36 PM »
Interested, heck yea.  Can you stitch leather ?  Its something i have always wanted to learn, someday i will.  I started to make a chair called the "figure of 6" by a famous maker called Joseph Walsh from Ireland.  I just wanted to see if i could.  It is quite a tricky glue up & i have made the hard part but i just cant get the time to get back to it, just to busy with work.  I would love to have more spare time to make chairs & a Maloof inspired rocker will be my next victim  ;)

http://www.josephwalshstudio.com/

go to selected works, then figures & form.  then figure of 6.  I think it looks quite nice.

Woodguy
If its made of wood, i can make it smaller.
Shirt size medium
p.s- ive started reading these too

Offline Jesse Cloud

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Re: MFT Jig Puzzle
« Reply #20 on: July 28, 2010, 06:24 PM »
Interested,  yea.  Can you stitch leather ?  Its something i have always wanted to learn, someday i will.  I started to make a chair called the "figure of 6" by a famous maker called Joseph Walsh from Ireland.  I just wanted to see if i could.  It is quite a tricky glue up & i have made the hard part but i just cant get the time to get back to it, just to busy with work.  I would love to have more spare time to make chairs & a Maloof inspired rocker will be my next victim  ;)

http://www.josephwalshstudio.com/

go to selected works, then figures & form.  then figure of 6.  I think it looks quite nice.

Woodguy


Wow, I watched the video and Joseph Walsh is incredible.  Wish I had that kind of creative imagination.  Be sure and post some pics when you get back to your figure of 6 chair.   BTW, I never learned how to stitch leather, maybe if I ever get wood figured out.

Offline Tom Bellemare

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Re: MFT Jig Puzzle
« Reply #21 on: July 28, 2010, 07:43 PM »
That looks like it's going to be a stellar chair, Jesse.

I vaguely remember my Great Uncle stitching leather when I was a kid. He was a non-com Navy man, who was in WW1 & WW2. They sent him back home and then when Korea started up, they grabbed him again.

My memory is a little vague but I think I remember him using an awl to poke a hole and big, thick needles. He was a very patient guy.  I guess hanging out on Naval ships for most of your life will either make you patient or crazy.


Tom
« Last Edit: July 28, 2010, 09:10 PM by Tom Bellemare »
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Offline lumbajac

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Re: MFT Jig Puzzle
« Reply #22 on: July 28, 2010, 08:04 PM »
Hey Jesse,

I think you mentioned at the advanced routers end-user training that you were using dominos in your chairs.  If this is correct, which part(s) of the chair in the picture is assembled using dominos?

Nice chair by the way... it's giving me some inspiration to build a dining set... especially if the domino is involved, which I still need to purchase.

Thanks,
Corey
U.P. of Michigan
Corey - U.P. of Michigan

Offline Peter Halle

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Re: MFT Jig Puzzle
« Reply #23 on: July 28, 2010, 08:53 PM »
Slightly off topic, but relevant.  If you ever get the opportunity to meet Jesse in person - DO IT.  I had the opportunity to meet him at a class and have spent time talking with a team mate.  The consensus - a guy who has so much knowledge and needs to be milked for information here more than he lets on.

Peter

Offline Jesse Cloud

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Re: MFT Jig Puzzle
« Reply #24 on: July 28, 2010, 11:52 PM »
Hey Jesse,

I think you mentioned at the advanced routers end-user training that you were using dominos in your chairs.  If this is correct, which part(s) of the chair in the picture is assembled using dominos?

Nice chair by the way... it's giving me some inspiration to build a dining set... especially if the domino is involved, which I still need to purchase.

Thanks,
Corey
U.P. of Michigan
Hey Corey,
In this chair, the only dominoes are those that connect the crest rail to the tops of the rear legs.  And oh yeah, the backsplat enters the rear stretcher at a 15 degree angle.  Made that mortise with two side by side cuts with the domino.  Next chair I do, I think I will use the Domino for all the joinery.  Will probably use twin dominoes with one pair going in higher than the other, say the pair connecting the rear stretcher could be above the pair connecting the side stretcher.

One thing for sure, glad I'm not trying to make a living building chairs!   [scared] [big grin]

Jess

Offline woodguy7

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Re: MFT Jig Puzzle
« Reply #25 on: July 29, 2010, 05:08 AM »
I'm glad you changed your avatar picture.  That dude with the fuzzy hair freaked me out  [eek]
If its made of wood, i can make it smaller.
Shirt size medium
p.s- ive started reading these too

Offline Jesse Cloud

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Re: MFT Jig Puzzle
« Reply #26 on: July 29, 2010, 09:40 AM »
I'm glad you changed your avatar picture.  That dude with the fuzzy hair freaked me out  [eek]
The new avatar is from an exhibition of Henry Moore's sculpture in the Denver Botanical Gardens.  They have 18 large pieces spread throughout the garden, many in the middle of water features with great reflections.  Well worth a visit if anyone is in the area.