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post #1 of 11 (permalink) Old 09-13-2014, 12:58 PM Thread Starter
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Default Follow My Logic If You Will...

I have been messing around with one of my Infinity Miter Lock Bits. I have both the larger bit and the smaller one. Both of them can be set up to cut the miter slots on 3/4" stock and so far most of my need for miter lock cuts has been for that stock thickness.

First of all, just for the reader's information, I have added a zero clearance sub fence to the Incra's primary fence, it is made of 3/4" MDF, which by they is not 3/4", it is slightly over that dimension by .012" which may be due to the current humid condition which is the result of some serious rain fall that we had a day or so ago , over four inches by the way.

Once I got the set up done with the Infinity set up gauge for the larger bit and had made a few practice cuts to be certain that the set up was correct, I made a set of set up blocks for future set ups because using the set up gauge is difficult for me to see due to my limited vision. I un-did the set up and re-did a new one using the blocks and everything still worked as it should.

Once that was done I checked to see how high the bit was set from zero. Zero for this was found by lowering the bit using the Incra Mast R lift to a point where the flat wrench that came with the lift could lay acrose he opening in the insert ring and just kiss the top end of the bit. Once that was done I found that in order to return to the correct height it took 16 turns of the crank which is about one inch, plus .020".

Then I set the zero for the fence position by turning the bit so that the long part of it was 90 degrees to the fence, I used a straight edge and brought the fence forward to a point where a straight edge just kissed the the leading edge of the bit. I moved the fence rearward then by 5/8" to return to the original setting which had been recorded on the primary scale on the Incra positioner.

The theory now is that a set up for any thickness of stock could be accomplished by using this information. It should be just a matter of simple math if a person has the Incra system and a Mast R lift, or a similar lift and fence positioner.

I recognize that a new ZC fence has to be made for each different setting for differenct thicknesses of stock.

Wondering if anybody else has tried this or will agree with me or not on the concept.

This may be just a brain twister for some folks, but nobody is holding a gun to anybody's head to read my somethings weird threads.

Jerry










Jerry

Last edited by Jerry Bowen; 09-13-2014 at 02:53 PM.
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post #2 of 11 (permalink) Old 09-13-2014, 01:17 PM
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This is way to much information for my little brain to comprehend.
You may as well be speaking Spanish lol

Don't feel bad though , as I've rarely understood a thing Stick has said either

I wonder if they make that book " wood routing for dummies" as I'd buy it

I donít always insulate , but when I do .
Ok ,I never insulate

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post #3 of 11 (permalink) Old 09-13-2014, 01:34 PM Thread Starter
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This is way to much information for my little brain to comprehend.
You may as well be speaking Spanish lol

Don't feel bad though , as I've rarely understood a thing Stick has said either

I wonder if they make that book " wood routing for dummies" as I'd buy it

Rick,

You and others that don't follow this are sure not dummys, it's just a matter of how our brains work. Thinking about such things can be a curse sometimes as well as a blessing. I admit that if more that a couple of members care about this thread I will be very surprised. The vast majority of readers will feel just like you do, sooooo with that I'll see what responses I get.

By now most members should have figured out by now that one of my favoriete pass times is to throw out weird questions just to see what responses I can get.

Jerry
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post #4 of 11 (permalink) Old 09-14-2014, 06:54 AM
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Don't feel bad though , as I've rarely understood a thing Stick has said either
I heard that...
ouch!!!!

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!!!
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post #5 of 11 (permalink) Old 09-14-2014, 07:09 AM
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Jerry...

Since you have a 'fixed' point as a reference, and it is repeatable and accurate, as long as the math is done correctly and executed accurately, I don't see why what your suggesting isn't possible and to some extent quite practical. Given the accuracy of the Incra fence and the lift.
As they say though, the proof is in the pudding! You'll have to give it a try on another thickness using the methods you suggest and report back

"..... limited only by imagination"

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post #6 of 11 (permalink) Old 09-14-2014, 07:51 AM
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I understand what you are saying and I don't see why it wouldn't work. BUT the proof is indeed in the pudding and if it does work I would probably create a set up block each time you create a new setting as I think that would be easier to work with.
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post #7 of 11 (permalink) Old 09-14-2014, 08:26 AM
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I'm with Bill. As with most measurement systems involving math and increments on a fixed scale, it's prone to mistakes. Parallax errors, inaccurate calculations, conversion errors, inaccurate instruments and poor eyesight.
A direct, unchanging system or device is always superior. i.e. story sticks, 123 blocks, key way stock and SET UP BLOCKS.

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post #8 of 11 (permalink) Old 09-14-2014, 09:11 AM Thread Starter
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I will give the concept a try, one thing that does sort of muddy the waters is that all of the info that pertains to the larger of the two bits is that another set of information is going to be be required for the smaller bit.

It will be interesting to see if the theory works or not due to all of the potential things that can bo wrong.

In my experimenting with the miter lock bits I was surprised, maybe should not have been but when the fence was out of its correct position by 1/32" one way or another, the resulting cuts were way off of what they should be. This simply verifies what others have express in regard to how sensitive the set up of these bits is.

If anybody familiar with using the bits has discovered, the feed rate and amount of pressure on the workpiece is extremely important. I don't know but I do suspect that the fact that the wood I have experimenting with is white oak which is very hard and maybe even the fact that it quarter sawed might have some bearing on the way the bit cuts it.

I'll get back and attempt to make the explanation easier to grasp as I suspect my explanation is a bit difficult to follow for some people.

The real bottom line is that the miter lock bit concept is a great one and really has an important place in a wood working shop

Jerry
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post #9 of 11 (permalink) Old 09-15-2014, 07:23 AM
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(snipped)
I don't know but I do suspect that the fact that the wood I have experimenting with is white oak which is very hard and maybe even the fact that it quarter sawed might have some bearing on the way the bit cuts it.

I'll get back and attempt to make the explanation easier to grasp as I suspect my explanation is a bit difficult to follow for some people.


The real bottom line is that the miter lock bit concept is a great one and really has an important place in a wood working shop

Jerry
Hard maple ain't all that easy, either. I'm trying an experiment to MAYBE alleviate that problem. More later....if it works.

I followed it OK. It's just too much work.

Agreed. The lock miter concept has it's place in my shop.

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post #10 of 11 (permalink) Old 09-15-2014, 10:56 AM Thread Starter
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Hard maple ain't all that easy, either. I'm trying an experiment to MAYBE alleviate that problem. More later....if it works.

I followed it OK. It's just too much work.

Agreed. The lock miter concept has it's place in my shop.

Gene,
Your remark in which you said that it is just to much work is understandable. Nobody with normal vision would ever want to fool around with that mathematical drill, but if you are visually handicapped, it's a good option, and that really was the point of it all.

I am anxious to know what you are thinking about in regard to routing hard wood like maple and white oak.

Jerry
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