custom made dovetail jig? - Router Forums
Reply
 
LinkBack Thread Tools Display Modes
post #1 of 19 (permalink) Old 03-21-2011, 04:58 PM Thread Starter
Registered User
 
Jack Wilson's Avatar
 
Join Date: Mar 2010
Country: United States
First Name: Jack
Posts: 918
 
Default custom made dovetail jig?

Ok friends, please help if you can on this. I have some pine I will be making into a chest, about 28" high, (give or take, so the jig needs to be that wide), and I would like to make a jig of masonite or aluminum to set the joints at my chosen spacing. I have never used ANY type of dovetail jig before, I have never made any dovetail joints, period. This is all uncharted water for me and I don't want to spend a lot on a really wide jig. Is what I want to do feasible? I plan on using 5/4 pine, so what about offset, how should I handle this so I can route both sides at once? I plan on through dovetails. Can you offer advice or experience?

Thanks guys, and gals

Jack


He is no fool who gives what he cannot keep to gain what he cannot lose

If you cannot stand behind our troops, (and I understand, no judgement here), then please stand in front of them, remember, they're willing to stand in front of you!

Last edited by Jack Wilson; 03-21-2011 at 05:27 PM.
Jack Wilson is offline  
Sponsored Links
Advertisement
 
post #2 of 19 (permalink) Old 03-21-2011, 05:43 PM
Marine Engineer
 
kp91's Avatar
 
Join Date: Sep 2004
Country: United States
First Name: Doug
Posts: 4,522
 
Default

Popular woodworking had an article on the $19 dovetail jig, it may be available online


Ok, so I found it for ya, http://www.popularwoodworking.com/te...9_dovetail_jig

Doug
1 John 1:9
Fredericksburg, VA




http://disasterreliefeffort.org/

Last edited by kp91; 03-21-2011 at 05:47 PM.
kp91 is offline  
post #3 of 19 (permalink) Old 03-21-2011, 07:16 PM Thread Starter
Registered User
 
Jack Wilson's Avatar
 
Join Date: Mar 2010
Country: United States
First Name: Jack
Posts: 918
 
Default

Thanks Doug, I am still going over it trying to glean how this can be used on a wide panel.

Jack


He is no fool who gives what he cannot keep to gain what he cannot lose

If you cannot stand behind our troops, (and I understand, no judgement here), then please stand in front of them, remember, they're willing to stand in front of you!
Jack Wilson is offline  
Sponsored Links
Advertisement
 
post #4 of 19 (permalink) Old 03-21-2011, 09:14 PM
Forum Contributor
 
Join Date: Jan 2006
Country: United States
First Name: Bj
Posts: 23,786
       
Default

Hi Jack

You may want to look at the BIG dovetails , you can get the template at the right price and anyone can put the big ones it place and not need a hammer to get them to fit at glue up time...just do the 1st. 16" of the board and than slide the board down and do the rest of them, with the hand router..

Pins & Tails Through Dovetail Templates

Large Through Templates

Pins and Tails, Half-Blind, Box Joint Dovetail Jigs

======



Attached Thumbnails
Click image for larger version

Name:	6179.jpg
Views:	114
Size:	38.7 KB
ID:	42497  


"It's fine to disagree with other members as long as you respect their opinions"

Marc Sommerfeld Tools ,Videos
http://www.youtube.com/channel/UCT-n...RWaEpMA/videos

Find all threads started by bobj3
http://www.routerforums.com/search.php?searchid=944097


bobj3 is offline  
post #5 of 19 (permalink) Old 03-21-2011, 11:19 PM Thread Starter
Registered User
 
Jack Wilson's Avatar
 
Join Date: Mar 2010
Country: United States
First Name: Jack
Posts: 918
 
Default

Quote:
Originally Posted by bobj3 View Post
Hi Jack

You may want to look at the BIG dovetails , you can get the template at the right price and anyone can put the big ones it place and not need a hammer to get them to fit at glue up time...just do the 1st. 16" of the board and than slide the board down and do the rest of them, with the hand router..

Pins & Tails Through Dovetail Templates

Large Through Templates

Pins and Tails, Half-Blind, Box Joint Dovetail Jigs

======
Yes Bob, I absolutely want the bigger joints. I wondered if there was a way to machine my own, actually have a buddy do it, that would accomodate this size, but I guess I could just copy this one onto a larger pc. of aluminum to accomplish that. I think I have seen jigs that put both pcs of wood on the same side but they are offset some, and then you just route them once and it's all done, thats what I would really like to be able to do.

Jack


He is no fool who gives what he cannot keep to gain what he cannot lose

If you cannot stand behind our troops, (and I understand, no judgement here), then please stand in front of them, remember, they're willing to stand in front of you!
Jack Wilson is offline  
post #6 of 19 (permalink) Old 03-21-2011, 11:30 PM
Forum Contributor
 
Join Date: Jan 2006
Country: United States
First Name: Bj
Posts: 23,786
       
Default

Hi Jack

That would be great but it's takes a male and a female to make a dovetail joint the norm a box joint will work the way you want..


=======

Quote:
Originally Posted by Jack Wilson View Post
Yes Bob, I absolutely want the bigger joints. I wondered if there was a way to machine my own, actually have a buddy do it, that would accomodate this size, but I guess I could just copy this one onto a larger pc. of aluminum to accomplish that. I think I have seen jigs that put both pcs of wood on the same side but they are offset some, and then you just route them once and it's all done, thats what I would really like to be able to do.



"It's fine to disagree with other members as long as you respect their opinions"

Marc Sommerfeld Tools ,Videos
http://www.youtube.com/channel/UCT-n...RWaEpMA/videos

Find all threads started by bobj3
http://www.routerforums.com/search.php?searchid=944097


bobj3 is offline  
post #7 of 19 (permalink) Old 03-22-2011, 07:09 AM
gav
Registered User
 
Join Date: Oct 2009
Country: Croatia
First Name: Gavin
Posts: 777
 
Default

Jack, i think the most useful thing for you to look at would be this.
Stots Dovetail Template Master- "You can make your own jigs." - Page 1
gav is offline  
post #8 of 19 (permalink) Old 03-22-2011, 11:25 AM
Registered User
 
Ralph Barker's Avatar
 
Join Date: Dec 2008
Country: United States
First Name: Ralph
Posts: 2,001
 
Default

Since you haven't done dovetails before, Jack, you might want to spend some time studying the geometry of the joint first, and then how that geometry is applied to the manufacturing of a jig. The additional wrinkle is that you said you want to determine the spacing yourself, which is a more complex task. Plus, the 28" size is wider than the 24" width of commercially-made jigs.

As you might guess, precision is the name of the game with dovetails. Not only do the male and female parts of the joint (pins and tails respectively) need to fit on one corner, the precision has to be such that the fit will follow around all four corners of the box. Any errors (lack of precision) will be additive as you move from corner to corner. So, a seemingly small error will become a big one during assembly.

For through dovetails, the tails are cut with the angled dovetail bit following a template with straight fingers, and the pins are cut with a straight bit following the template with angled fingers. The angle on the template must, of course, be the same as the angle on the dovetail bit being used.

If you look at the templates for the jigs designed to do through dovetails, you'll see that the templates typically have straight fingers on one side, and angled fingers on the other, all precisely aligned, so the two parts of the joint are cut by turning the template around. The versions of the machines that allow custom spacing (e.g. the Leigh DR4 Pro and the PC OmniJig) have movable individual fingers that are locked into a template base.

The instructions for the PC 4200-series (fixed-spacing) jigs include methods for attaching the template to a separate wooden bar that can then be clamped to the stock for making wider joints. Essentially, you clamp it in one place, cut those tails or pins, then reposition it on the stock, and cut the next set. Precisely repeatable alignment becomes the issue.

There are also "chest" jigs available for making wide panels with dovetail joinery. These, again, typically involve multiple repositioning of the jig along the end of each panel, introducing potential alignment errors with each repositioning.

If you have machine-shop capabilities, you could certainly duplicate the templates from one of the commercially-made fixed-spacing jigs to be long enough to avoid the repositioning problem. If so, use aluminum, not Masonite. The Masonite would wear too quickly to be practical. But, that doesn't accomplish your custom spacing.

The other alternative, of course, would be to lay out the spacing as you want, and then hand cut the tails and pins, as has been done for years. You'd likely need to do a fair amount of practice before tackling the chest, however.

- Ralph
Ralph Barker is offline  
post #9 of 19 (permalink) Old 03-22-2011, 11:56 AM
Registered User
 
Join Date: Mar 2011
Country: United States
First Name: Randal
Posts: 132
 
Default

Jack,

Part of your description (both parts on one side, able to do larger panels), reminded me of a post from a couple of days ago. It mentioned the General tools jig with a link to the videos. Could this be one of the ones your thinking of?
LinuxRandal is offline  
post #10 of 19 (permalink) Old 03-22-2011, 01:20 PM
Forum Contributor
 
Join Date: Jan 2006
Country: United States
First Name: Bj
Posts: 23,786
       
Default

Hi Jack

If you can swing it buy the over price PC 24" dovetail jig (550.oo ) for the one time job but it's hard to beat a template made by a CNC machine..but it's your money so I would say go for it.. it's only money and you can't take it with you they say..

Amazon.com: Porter-Cable 77240 24-Inch Omnijig Joinery System: Home Improvement

=====

Quote:
Originally Posted by Ralph Barker View Post
Since you haven't done dovetails before, Jack, you might want to spend some time studying the geometry of the joint first, and then how that geometry is applied to the manufacturing of a jig. The additional wrinkle is that you said you want to determine the spacing yourself, which is a more complex task. Plus, the 28" size is wider than the 24" width of commercially-made jigs.

As you might guess, precision is the name of the game with dovetails. Not only do the male and female parts of the joint (pins and tails respectively) need to fit on one corner, the precision has to be such that the fit will follow around all four corners of the box. Any errors (lack of precision) will be additive as you move from corner to corner. So, a seemingly small error will become a big one during assembly.

For through dovetails, the tails are cut with the angled dovetail bit following a template with straight fingers, and the pins are cut with a straight bit following the template with angled fingers. The angle on the template must, of course, be the same as the angle on the dovetail bit being used.

If you look at the templates for the jigs designed to do through dovetails, you'll see that the templates typically have straight fingers on one side, and angled fingers on the other, all precisely aligned, so the two parts of the joint are cut by turning the template around. The versions of the machines that allow custom spacing (e.g. the Leigh DR4 Pro and the PC OmniJig) have movable individual fingers that are locked into a template base.

The instructions for the PC 4200-series (fixed-spacing) jigs include methods for attaching the template to a separate wooden bar that can then be clamped to the stock for making wider joints. Essentially, you clamp it in one place, cut those tails or pins, then reposition it on the stock, and cut the next set. Precisely repeatable alignment becomes the issue.

There are also "chest" jigs available for making wide panels with dovetail joinery. These, again, typically involve multiple repositioning of the jig along the end of each panel, introducing potential alignment errors with each repositioning.

If you have machine-shop capabilities, you could certainly duplicate the templates from one of the commercially-made fixed-spacing jigs to be long enough to avoid the repositioning problem. If so, use aluminum, not Masonite. The Masonite would wear too quickly to be practical. But, that doesn't accomplish your custom spacing.

The other alternative, of course, would be to lay out the spacing as you want, and then hand cut the tails and pins, as has been done for years. You'd likely need to do a fair amount of practice before tackling the chest, however.



"It's fine to disagree with other members as long as you respect their opinions"

Marc Sommerfeld Tools ,Videos
http://www.youtube.com/channel/UCT-n...RWaEpMA/videos

Find all threads started by bobj3
http://www.routerforums.com/search.php?searchid=944097


bobj3 is offline  
Reply

Quick Reply
Message:
Options

Register Now



In order to be able to post messages on the Router Forums forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Password
Please enter a password for your user account. Note that passwords are case-sensitive.

Password:


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:
OR

Log-in











Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode



Similar Threads
Thread Thread Starter Forum Replies Last Post
Router set and dovetail jig advise el gaucho General Routing 4 02-11-2011 04:21 PM
New Dovetail Jig for $30 - is it worth it? Gweedz Jigs and Fixtures 6 09-19-2010 09:57 AM
Dovetail Jig - Dakota Ebony Guide Bushings and Templates 2 07-07-2010 08:42 AM
Bit Speed for Dovetail Jig darenrogers Jigs and Fixtures 8 05-14-2010 11:23 AM
Making your own dovetail jig templates Dominick Giarraputo Jigs and Fixtures 2 09-03-2005 07:17 AM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are On
Refbacks are On

 
For the best viewing experience please update your browser to Google Chrome