Fence squareness - Router Forums
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post #1 of 26 (permalink) Old 10-22-2016, 07:44 AM Thread Starter
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Default Fence squareness

I was working on my router table last evening preparing to route for my miter slot and t track and noted the fence wasn't nice and square. I measured this Morning and it is approximately .027 out at the top. The fence is 4" tall to give an idea of how much out of square over how much run. I'm sure this is probably not the end of thr world just looking for thoughts. Pic attached


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post #2 of 26 (permalink) Old 10-22-2016, 08:24 AM
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is table square to the bit...
verify this 1st...
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This would have been the week that I'd have finished chewing thru the restraints...
If only new layers hadn't been added....

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Last edited by Stick486; 10-22-2016 at 08:33 AM.
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post #3 of 26 (permalink) Old 10-22-2016, 08:26 AM Thread Starter
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I believe I understand your question but am trying to visualize the process of that.


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post #4 of 26 (permalink) Old 10-22-2016, 08:39 AM
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I went back and edited...

put a verified straight ˝'' drill bit in the router and check the table for squareness to the bit......
drill rod is better than a bit and you can check for run out while yur in there...
also, it won't hurt to check the table for flatness...

see if you have sawdust built up behind the sacrificial face on your fence..
another thing.. is your square square...
those styles/types of square are known to be out of square.. brand new...
I like verified USA made Swanson speed square...

please do not turn the router on or work on any of this with it plugged in...
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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”

Last edited by Stick486; 10-22-2016 at 08:42 AM.
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post #5 of 26 (permalink) Old 10-22-2016, 08:47 AM Thread Starter
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OK I understand about the bit vs table 90 deg squareness. I thought you were saying make sure the bit and fence were both vertical which i couldn't get my head wrapped around. I did remove the sacrificial and verified the sacrificial are flat and square even double checked the t slot I cut. The fence without sacrificial is the same amount out from the table. I verified the table was flat. I will check the bit to table 90 and the run out of the router when I get home. I am unfortunately stuck at work till 2 and then most likely won't get back in the shop till around 8 pm and then of course I will probably get paged out for something and never make it back into the shop for the night.

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post #6 of 26 (permalink) Old 10-22-2016, 09:54 AM
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Fence should be as straight and square as possible/practical.
Imagine if your material prep is <desirable.
Then the squareness of your work and the fence being < or > 90° will compound the error in the y-axis. So you might want a slot down the work, & it will vary from work-piece to work-piece depending on how the misshapen stock is presented to the cutter.
= Undesirable.
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post #7 of 26 (permalink) Old 10-22-2016, 10:00 AM
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and then you use a known square square for all of this...
stop at an art store and pick up 90/45 and 30/60 drafting triangles..
good for tool/blade set ups too...
bigger is better and quality matters...

Alvin makes good ones...

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”
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post #8 of 26 (permalink) Old 10-22-2016, 11:17 AM Thread Starter
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Quote:
Originally Posted by Quillman View Post
Fence should be as straight and square as possible/practical.
Imagine if your material prep is <desirable.
Then the squareness of your work and the fence being < or > 90° will compound the error in the y-axis. So you might want a slot down the work, & it will vary from work-piece to work-piece depending on how the misshapen stock is presented to the cutter.
= Undesirable.
Can you expound on what you posted. I think I am missing something in your message.

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post #9 of 26 (permalink) Old 10-22-2016, 06:44 PM
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I think Pat was referring to when you cut the parts out to make the fence. One option if everything proves that the fence is out of square is to shim it back to straight by adding strip(s) of veneer to the back edge. By the way, can you post a pic of the entire fence assembly just to make sure our suggestions will work Chris?
Also, one way to verify if your square is square is to put it on a straight edge piece of ply or mdf and scribe a line with a knife blade. Then flip the square over and see if you can scribe another line that exactly matches the first.

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 #10 of 26 (permalink) Old 10-22-2016, 07:17 PM Thread Starter
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Default Fence squareness

So I used a drafting triangle with a sold steel rod as I didn't have a 1/2" drill bit with full 1/2" shank and no 1/2" bolts long enough. The router shaft is indeed tipped back a slight amount. I have attached pictures of my fence setup as well.


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