Leigh D4R single pass half-blind setup - Router Forums
 4Likes
  • 2 Post By Stick486
  • 2 Post By CharleyL
 
LinkBack Thread Tools Display Modes
post #1 of 5 (permalink) Old 02-17-2017, 05:48 PM Thread Starter
Registered User
 
Bob Adams's Avatar
 
Join Date: Jul 2014
Country: United States
First Name: Bob
Posts: 191
 
Default Leigh D4R single pass half-blind setup

I am getting ready to make 16 drawers for a built-in. This is first time I have used the jig for single pass half-blind dovetails, and I am having some setup problems. I am pleased with the overall fit but 2 things keep happening in my practices boards.
The first is a gap in one of the dovetails, and the second is the boards are offset by about a 1/16". No matter how I change the setup this continues to happen. So it is time for the experts! Here is a pic. If it matters the boards are 3"1/4" wide and 1/2" thick.
Attached Thumbnails
Click image for larger version

Name:	DSC_0461.JPG
Views:	283
Size:	68.9 KB
ID:	259530  

Bob Adams is offline  
Sponsored Links
Advertisement
 
post #2 of 5 (permalink) Old 02-17-2017, 07:02 PM
Forum Contributor
 
Stick486's Avatar
 
Join Date: Jan 2013
Country: United States
First Name: Stick
Posts: 25,160
 
Default

https://www.leighjigs.com/vids.php


whimsofchaz and artman60 like this.

This would have been the week that I'd have finished chewing thru the restraints...
If only new layers hadn't been added....

Stick....
Forget the primal scream, just ROAR!!!
"SNORK Mountain Congressional Library and Taxidermy”
Stick486 is online now  
post #3 of 5 (permalink) Old 02-18-2017, 11:38 AM
Registered User
 
CharleyL's Avatar
 
Join Date: Feb 2009
Country: United States
First Name: Charley
Posts: 1,997
 
Default

Is the front of your board slightly cupped? This gap can be caused if the box front isn't perfectly flat. The clamp on the D4R will hold it flat while cutting, but the cup will return when the clamp is released. If there is any play at all in the dovetail and the board cups, you will see this gap as the face board pulls away at that point from the side board. Good clamping should be enough to pull this small gap closed. The glue should keep it from opening back up.

The 1/16" offset is usually caused by a slight difference in side position of one piece being cut to the other. When doing 1/2 blind dovetailing you are using different clamp positions for the two boards. For through dovetails, you are using only the front clamp position, so both boards would be referenced against the same side stop. I'm suspecting that there may be a 1/16 difference between the two side stops (top and front) in your jig, but since the D4R base is CNC machined, I'm not sure how this could happen, but it's still a possibility.

Can you place two boards, one in the top clamp and one in the front clamp with both up against their side stops and then check to see that the edge touching the stops of both boards are in line with each other (the edge of one directly above and in line with the edge of the other)? If there is a 1/16 difference in the stops, there is a machining problem with the end stops on your jig. If not, we need to look further.

Another possibility is to watch closely to assure that the boards do not move away from the stop as you tighten the clamp, although this happening by the same amount each time is very unlikely. but we still need to check this

Charley
Ray Newman and whimsofchaz like this.

Central North Carolina
CharleyL is offline  
Sponsored Links
Advertisement
 
post #4 of 5 (permalink) Old 02-18-2017, 06:36 PM
Registered User
 
whimsofchaz's Avatar
 
Join Date: Jun 2013
Country: United States
First Name: Chuck
Posts: 277
 
Default

Charley wrote:

"Can you place two boards, one in the top clamp and one in the front clamp with both up against their side stops and then check to see that the edge touching the stops of both boards are in line with each other (the edge of one directly above and in line with the edge of the other)? If there is a 1/16 difference in the stops, there is a machining
problem with the end stops on your jig. If not, we need to look further."

In my experience Charley is right when he says: "If there is a 1/16 difference in the stops, there is a machining problem with the end stops on your jig" usually the spacing is the problem. Watch the first video that Stick put up it explains the problem. The good news is that is all is fixable. Best dovetail jig ever made
whimsofchaz is offline  
post #5 of 5 (permalink) Old 02-18-2017, 08:40 PM Thread Starter
Registered User
 
Bob Adams's Avatar
 
Join Date: Jul 2014
Country: United States
First Name: Bob
Posts: 191
 
Default

Thanks for the responses everyone. As usual the problem turned out the be the dip stick in charge. I decided to tear the setup down and start over, and discovered that I was using the wrong dovetail spacer. Used the correct spacer, and perfect dovetails the first time. Go figure....
Bob Adams 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
Porter Cable 55160 Omnijig Review Echonav Tool Reviews 19 06-21-2015 03:59 AM
Does anyone here OWN a MLCS pins and tails half blind dovetail and box joint jig? The Warthog Jigs and Fixtures 3 08-14-2014 03:18 PM
Leigh D4R Pro Single Pass Dovetail trhymers Jigs and Fixtures 7 05-12-2014 01:18 PM
Leigh D4R Pro Spreadsheet evilbadger Jigs and Fixtures 1 02-24-2014 07:30 AM
New Lower Priced Leigh Dovetail Jig scrollwolf Jigs and Fixtures 1 07-08-2007 06:10 PM

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