| Project by rmac | posted 1035 days ago | 7831 views | 61 times favorited | 31 comments | ![]() |
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The dial and the screw on the table saw fence micro adjuster posted by BritBoxmaker a few days ago reminded me of a similar mechanism on a jig I made a few months ago. Instead of allowing precise adjustments to the fence, my jig makes it easy to make precisely spaced crosscuts. I originally intended it as a box joint jig, but it’s actually useful for other operations as well.
My jig is a variation on a standard crosscut sled. The basic idea came from Matthias Wandel's orignal box joint jig. Instead of a crank like Matthias used, I put a knob with a dial on mine to move the carriage crossways past the blade. Each mark on the dial represents 0.002” of carriage movement, so with a little planning, you can make any sort of box joint you want. At first I had numbers on the dial, but I found that the colored lines and dots on the dial shown in the pictures made it easier to use the jig without making stupid mistakes.
The first few pictures show the jig itself. The last few show some of the first joints that I made with it.
Update, November 13, 2011: There’s now an article on my blog with plans and lots more details about this jig.
—Russ
-- My table saw laughs at hot dogs. http://thesorteddetails.blogspot.com/
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31 comments so far
Dennisgrosen
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10854 posts in 1285 days
#1 posted 1035 days ago
niice jiig
thank´s for sharing
Dennis
levan
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312 posts in 1149 days
#2 posted 1035 days ago
I like your jig. May have to build one of these.
-- Lynn "If you think you can do a thing or think you can't do a thing, you're right". Henry Ford
BritBoxmaker
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4011 posts in 1206 days
#3 posted 1035 days ago
Well I never thought of using it like that! Brilliant. I’m going to have to try this. The colour coded dot system looks like a winner too. Well done.
-- Martyn -- Boxologist, Pattern Juggler and Candyman of the visually challenging. http://www.theartofboxes.com
a1Jim
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87230 posts in 1747 days
#4 posted 1035 days ago
Great Idea Russ super jig
-- W James Brokenbourgh Custom furniture maker http://artisticwoodstudio.com/
Kent Shepherd
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2690 posts in 1456 days
#5 posted 1035 days ago
Awesome Russ
Looks like a winner
-- She thought I hung the moon--now she just thinks I did it wrong
rdjack21
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254 posts in 1097 days
#6 posted 1035 days ago
Really nice jig. It reminds me of another similar jig I saw here http://woodgears.ca/box_joint/jig.html that I’ve been thinking about making. Yours is considerably simpler though so I may make it instead.
-- --- Richard Jackson
rmac
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172 posts in 1230 days
#7 posted 1035 days ago
rdjack21,
Yes. The jig I got my idea from was made by the same guy (Matthias Wandel) who built the really fancy one that you saw. That guy is a real genius.
—Russ
-- My table saw laughs at hot dogs. http://thesorteddetails.blogspot.com/
Jim Jakosh
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7304 posts in 1275 days
#8 posted 1035 days ago
Nice idea to incorporate into a sled for super accuracy. Thanks for sharing!!
-- Jim Jakosh.....Practical Wood Products...........Learn something new every day!!
michelletwo
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1767 posts in 1186 days
#9 posted 1035 days ago
MOVE OVER INCRA!!!! Russ, very clever.
-- We call the destruction of replaceable human made items vandalism, while the destruction of irreplaceable natural resources is called development.
stefang
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9476 posts in 1504 days
#10 posted 1034 days ago
Good jig Russ.
-- Mike, American in Norway
Paul2274
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314 posts in 1282 days
#11 posted 1034 days ago
I like your jig.
Somehow from one man to another that just doesn’t sound right…... but what the heck….. I like your jig!
Paul
Bricofleur
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947 posts in 1363 days
#12 posted 1033 days ago
Fully adjustable ! I like it too. Thanks for posting.
Best,
Serge
http://atelierdubricoleur.spaces.live.com
-- Learn from yesterday, work today and enjoy success tomorrow. -- http://atelierdubricoleur.wordpress.com
lou
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340 posts in 1612 days
#13 posted 1033 days ago
great idea.i would like to make a copy if you dont mind.super job.
rmac
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172 posts in 1230 days
#14 posted 1032 days ago
lou: Copy away!
everyone else: Thanks for all the compliements, but credit for the idea really belongs to Matthias.
—Russ
-- My table saw laughs at hot dogs. http://thesorteddetails.blogspot.com/
David
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154 posts in 1885 days
#15 posted 1029 days ago
I got to thinking about using standard threaded rod for “lead screws” and the distance of travel per revolution (and partial revolution) of the rod (or nut). I made up a spread sheet for some of the standard pitches (number of threads per inch) and then if a divider head (disc) was fastened to the end of the rod for even increments of partial turns: what the travel distance would be. Example: If a standard ¼ – 20 screw was used: (20 threads per inch) then one turn would move the nut 1/20 inch or .050 inch. So for a half turn it would move .025, one third turn it would move .0166, and so on. Granted one will not maintain 4 decimal place accuracy due to the thread precision (or lack of) and backlash between the nut and rod threads. Here’s my chart if you want it ~ it’s in pic format so I could store it to share. http://picasaweb.google.com/Islandwoodworker/OddsAndEnds#5498996975538082850
Now if we can get someone to draw up and post divider heads (circles with even increments)
Let me know if I have any errors and I’ll correct them; I did a random check on the calculations.
-- Islandwoodworker@Gmail.com
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