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+-- Thread: Fix a nearly perfect miter? (/showthread.php?tid=7338442)
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Fix a nearly perfect miter? - ®smpr_fi_mac® - 03-26-2018
I'm using an Incra 1000SE. Upon clamping, *one* 90* miter doesn't close all the way. The others do.
Before I attack this and mess it up, can you guys advise me on what to do? Yes, I know the miter gauge is off, but I don't know which way to go.
RE: Fix a nearly perfect miter? - Gary G™ - 03-26-2018
How are the other 3 corners?
RE: Fix a nearly perfect miter? - ®smpr_fi_mac® - 03-26-2018
They all close up perfectly. This one doesn't.
RE: Fix a nearly perfect miter? - Gary G™ - 03-26-2018
Are the opposite pairs each exactly the same length as their mate?
Could this have been blade flex rather than the wrong angle?
Did the wood move?
I’m hard pressed to see 3 perfect miters using the same setup and the opposite pairs being exactly equal in length.
RE: Fix a nearly perfect miter? - Cooler - 03-27-2018
(03-26-2018, 07:54 PM)®smpr_fi_mac® Wrote: They all close up perfectly. This one doesn't.
Actually they are all imperfect and the result shows at the final joint.
A Lion Miter Trimmer will address this. There are lots of knockoffs lately (so many that LION went out of business).
http://www.rockler.com/miter-trimmer?sid=V9146?utm_source=google&utm_medium=cpc&utm_term=&utm_content=pla&utm_campaign=PL&gclid=EAIaIQobChMI9Zen7L6M2gIVCYzICh3I4AvBEAQYAiABEgKvIPD_BwE
But a more precise adjustment of the miter gage will also address this. A sled works better however.
RE: Fix a nearly perfect miter? - jteneyck - 03-27-2018
I'd say your angles are not exactly 45°, they are just a little less, and the other corners aren't really 90°. This is where a shooting board is your best friend.
John
RE: Fix a nearly perfect miter? - Cooler - 03-27-2018
(03-27-2018, 07:25 AM)jteneyck Wrote: I'd say your angles are not exactly 45°, they are just a little less, and the other corners aren't really 90°. This is where a shooting board is your best friend.
John
In the picture framing industry a LION miter trimmer or a 12" disk sander with an angle attachment was frequently used.
![[Image: BoltedDown.jpg]](https://framingsupplies-shop.com/images/FSHardware/BoltedDown.jpg)
There are motorized versions too, but for miter trimming a few turns by hand will do the trick. The key is the holder that clamps the molding in place.
https://framingsupplies-shop.com/ppfe/twelve-inch-disc-sander
RE: Fix a nearly perfect miter? - ®smpr_fi_mac® - 03-27-2018
I fudged on this one to get it done; I'm more in the "setting up" phase of my woodshop, but my anniversary is today so I needed to get this thing done.
A shooting board is in my future, once I have a hand tool table.
I need to build a miter sled, too.
RE: Fix a nearly perfect miter? - Derek Cohen - 03-27-2018
Use a Japanese dozuki saw (thin blade dovetail saw) to saw through the mitred kerf. The mitre will then close up perfectly.
Regards from Perth
Derek
RE: Fix a nearly perfect miter? - handi - 03-27-2018
(03-27-2018, 10:15 AM)Derek Cohen Wrote: Use a Japanese dozuki saw (thin blade dovetail saw) to saw through the mitred kerf. The mitre will then close up perfectly.^^^ this is the immediate solution^^^
Regards from Perth
Derek
Adjusting your miter gauge or building a framing sled is the long term solution as you state.