Screw driven Router Table Jig With DRO for Dovetail and Box Joints - Router Forums
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post #1 of 16 (permalink) Old 12-04-2018, 04:20 PM Thread Starter
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Default Screw driven Router Table Jig With DRO for Dovetail and Box Joints

This is my shop built router jig that can accurately cut dovetail slots and pins, as well box finger joints.
The jig is shown in Fig. 1-3 and its key features include
• Box frame of ½” MDT: approximately 6” X 6” X 18” overall
• ¼” thick 6" X 6" Aluminum carriage plate
• 3/8” X 16 screw attached to carriage plate with angle brackets carriage plate
• 1/8” X 2” steel angle clamping mechanism
• V-groove bearings that support the carriage on V-rails
• 12” Digital read-out
• 1/8” X 2” guide bar with a pivot hole and three holes to align the guide bar at 90⁰ for box joints and dovetail slots, and 90⁰+8⁰ for cutting dovetail pins

The jig can cut workpieces up to 6" wide.

The box frame provides for a rigid frame for the V-rails and associated V-bearings (4 for $14 on eBay). The ½” MDF frame is assembled with ½” Al angle and machine screws; the screw holes are drilled a little oversized so the fit and alignment of the carriage plate and V-bearing can be adjusted resulting in the carriage plate being square with the bottom of the frame, and no wobble of the carriage as it moves along the rails.

The slides below show the details of the jig. In use, the DRO (Igaging, Amazon) is used to accurately position the carriage and attached workpiece according the the desired dimensions. For box joints with uniform spacings, this is pretty simple; for dovetail pins and slots, I make a diagram as shown in Figs 7 and 8. Thankfully, all you need is simple arithimetic to determine dovetail dimensions -- no need to dust off those trigonometric brain cells!
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post #2 of 16 (permalink) Old 12-04-2018, 11:34 PM
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But I enjoy doing trig problems.
OPG3, DaninVan and Danman1957 like this.

Someone I consider a master woodworker once told me that a master woodworker is not someone who never makes mistakes. He is someone who is able to cover them up so that no one can tell.
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post #3 of 16 (permalink) Old 12-05-2018, 07:43 AM
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Do make a video of it running. N
HoweA likes this.
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post #4 of 16 (permalink) Old 12-05-2018, 08:18 AM
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Wow, way better than anything I have. Like Neville said, a video would be great.
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post #5 of 16 (permalink) Old 12-05-2018, 08:35 AM
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Stark,

Please allow me to be the first to say "WELCOME TO THE ROUTER FORUMS!"
I see this is your first post. I also noticed that you didn't offer a first name - no problem, but let me warn you:
WITH POSTS LIKE THIS YOU'RE GOING TO BECOME VERY POPULAR!
My wife and I got a Black Belgian Malinois - fresh from being trained for her handicap needs. He was 14 months old and weighed about 45 pounds.
HE DID NOT HAVE A NAME! From the very start, we knew he was going to be a "keeper", so she named him "Jericho".

Your contraption pictured herein is SUPER COOL! Very creative and several great ideas built into one compact machine!

I'm an inventor (that's what I do for a full-time occupation) and have products sold world-wide. You have a real "keeper" here!

Otis Guillebeau from Auburn, Georgia
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Tweak everything!
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post #6 of 16 (permalink) Old 12-05-2018, 11:45 AM
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Welcome to the forum, I hope to see more of your work.
A lot of thought and time went into that device, thanks for posting, it seems to produce very good joints.
Herb
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post #7 of 16 (permalink) Old 12-05-2018, 03:56 PM
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Welcome to the forum N/a
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post #8 of 16 (permalink) Old 12-05-2018, 04:29 PM
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Welcome to the forums. You've made some instant friends and you'd make more with the requested video but I'd be tickled pink with plans....just saying.
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post #9 of 16 (permalink) Old 12-05-2018, 08:26 PM Thread Starter
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When I conceived this jig, I had reviewed Sandor Nagyszalanczy’s description for a table saw jig for dovetails (Table Saw Dovetail Jig - Woodworking | Blog | Videos | Plans | How To). I actually built this jig, but was not happy with the results though – too much eyeballing for my tastes. I then looked at Matthias Wandel’s jig (Table saw dovetail joint jig) and James Hamilton’s router table jig at Dovetail Jigs and decided to see if I could combine some aspects of these two into one jig. So as with most things, the my jig is not entirely original, but was inspired by others.

So you really want a video, right? Never done that, so I will see if I can recruit someone to help. Could be fun.

Thanks for all the comments on the jig.

Last edited by starkw1; 12-05-2018 at 08:32 PM.
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post #10 of 16 (permalink) Old 12-05-2018, 08:34 PM Thread Starter
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When I conceived this jig, I had reviewed Sandor Nagyszalanczy’s description for a table saw jig for dovetails (Table Saw Dovetail Jig - Woodworking | Blog | Videos | Plans | How To). I actually built this jig, but was not happy with the results though – too much eyeballing for my tastes. I then looked at Matthias Wandel’s jig (Table saw dovetail joint jig) and James Hamilton’s router table jig at Dovetail Jigs and decided to see if I could combine some aspects of these two into one jig. So as with most things, the my jig is not entirely original, but was inspired by others.

So you really want a video, right? Never done that, so I will see if I can recruit someone to help. Could be fun.

Thanks for all the comments on the jig.
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