Author Topic: Sliding dovetails with the MFT and OF1400??  (Read 24880 times)

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Offline John Stevens

  • Posts: 805
  • Ardmore, PA
Re: Sliding dovetails with the MFT and OF1400??
« Reply #30 on: March 30, 2007, 11:16 PM »
Had some time to kill before hitting the road, so I'm trying to post some pics.  I don't have software to resize, so I can only post the ones that are 175kb or smaller in size.  Not many good choices, but here goes:

1. Clamping system using festool extrusions and clamps.  Could have used the rapid-action clamps instead.  Shown clamping a "traditional" tenon at 90 degrees.  The pic only shows one clamp, but you must use two in order to keep the workpiece from moving when cutting the joint.

2. Fence system--two little buttons that can be slid along the extrusion to form lots of angles.  Shown here being set to clamp at 45 degrees.


3. A sliding dovetail cut with this jig.

Unfortunately, I can't post a pic of the prototype jig with the pivoting fence and star-nut clamping system because the file is too big.  But I hope these pics are helpful.

Regards,

John
« Last Edit: March 30, 2007, 11:21 PM by John Stevens »
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--Captain Beefheart

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Offline Dave Rudy

  • Posts: 771
  • Coloroda Front Range, in the lee of Pikes Peak
Re: Sliding dovetails with the MFT and OF1400??
« Reply #31 on: March 31, 2007, 09:15 AM »
Thanks John.  Helpful pics.

In the first pic, how do we make sure that the stock is at 90 degrees to the router base (or top of MFT)?

I think we can make the MFS/MFT system work well this way for sliding dovetails.

Dave

Offline AMC

  • Posts: 27
Re: Sliding dovetails with the MFT and OF1400??
« Reply #32 on: April 01, 2007, 05:54 AM »
Matt,

I'm having trouble visualizing this.  Could you explain in more detail how you use the MFS in this setup?  Pics would also be helpful.

Dave - sorry about the delay in responding. Dan's using the same concept, and I can't really improve on his pics. But now I'm back in range of communications, I'm following the discussion with interest. The flaw with the setup I used, and which Dan posted, is in getting accurate, repeatable, incremental adjustments. I'd like to find a solution to this, because it's otherwise a quick and easy way of routing tenons. I have to make a couple of windows over Easter, so it will be an opportunity to tinker with tenon technique.

Matt

Offline John Stevens

  • Posts: 805
  • Ardmore, PA
Re: Sliding dovetails with the MFT and OF1400??
« Reply #33 on: April 05, 2007, 12:50 PM »
In the first pic, how do we make sure that the stock is at 90 degrees to the router base (or top of MFT)?

Hi, Dave.  Sorry for the delayed reply, but I just got back in town.  I hope these pics answer your questions.  The first two are from the same jig pictured above.  The fence is set with a square, and the "face" is fixed at 90 degrees to the top with corner braces.  The corner braces are cut at exactly 90 degrees on the MFT, with the fence set on the MFT using the method Rick Christopherson teaches here:

http://home.att.net/~waterfront-woods/Articles/Double-Error-Squaring.html

The second two pics show a different fence and clamping system from a prototype of the other jig.  The fence pivots.  The clamps are just oak sticks backed with a high-friction polymer material (carpet underlayment from Home Depot, but the high friction tape from Lee Valley would work as well).

The last pic is of my late dog playing in the bushes.  Sorry, it's appropos of nothing, but it was on the same CD as the jig pics, so I couldn't help myself.
What this world needs is a good retreat.
--Captain Beefheart

Offline Jim Dailey

  • Posts: 278
Re: Sliding dovetails with the MFT and OF1400??
« Reply #34 on: April 05, 2007, 01:04 PM »
John,

Very creative......

Very refined use of Clamping Profiles !!!

Nice "out of the box thinking..."

jim
Life is just a series of projects...

Offline Jesse Cloud

  • Posts: 1713
  • Festooling at the end of a dirt road in New Mexico
Re: Sliding dovetails with the MFT and OF1400??
« Reply #35 on: April 05, 2007, 07:23 PM »
Great thread.

I built the jig from Jerry Work's MFS manual and it works great. 

This forum really adds a lot of value to the tools.  I just got my domino and I'll bet in a few weeks there will be dozens of creative new uses for it on this board. I can hardly wait!

Offline Dave Rudy

  • Posts: 771
  • Coloroda Front Range, in the lee of Pikes Peak
Re: Sliding dovetails with the MFT and OF1400??
« Reply #36 on: April 05, 2007, 07:40 PM »
John,

Thanks for taking the time to post those pics.  Excellent work, as always!!   It is amazingly helpful when creative people are willing to share their ideas and help solve common problems.

Sorry about your dog.  I know how attached I am to my four-legged friend.  I know that one of us will be in for something of a rough time when the other one departs.

Dave