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PostPosted: Tue Aug 02, 2016 9:41 pm 
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Location: Albuquerque, NM USA
I haven't been here for quite a while. Been on the metalworking gig for a long time but wanted to make a storage box / drawers for
a bunch of milling cutters so back to woodworking. (my 50+ years of hobby) :-)
One thing quickly lead to another so had to "invent" another device to meet my acquired closer tolerance mind set that has come about
from the metal work. The device is used to increment the work along the fence in repeatable or any desired amounts with resolution
of about .005" . So In describing this (which I may do an article or at least a bunch of pix for here or a Mag.) I got to wondering if
there is an accepted axis designation for the two directions on the table of a radial arm saw. I have been using the X,Y,Z axes on
milling machines and lathes for several years now but not sure if other woodworkers have such a concept for use with saws. I can see
quickly that the difference between the radial arm and the table saws will cause some confusion. :-) Cuts being perpendicular in one case and parallel in the other to the fence.
So is there any accepted terminology for the directions????
Thanks.
Lew Hartswick


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PostPosted: Tue Aug 02, 2016 11:46 pm 
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Lew, I understand your dilemma but rip and crosscut are the only 'terminology' that I know. Our friend Lawrence and Drstrip have/use CNC machines & programs. Perhaps one of them could weigh in here with what you're looking for.

good luck,

Don


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PostPosted: Wed Aug 03, 2016 7:28 am 
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The problem with the term rip is, it is a function not a direction. I can rip in both directions on my radial arm saw. The normal
way, of course is parallel to the fence but I have a fixture to hold short pieces with the grain running perpendicular to the
fence and "rip" by pulling the saw. This the way I can get thin pieces without the danger inherent in trying it along the fence.
So to describe the function of the several devices I've come up with I need some terms to describe the directions. :-)
...lew...


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PostPosted: Wed Aug 03, 2016 11:41 pm 
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Woodworkers don't use x, y, z unless they've been corrupted by the CNC world.
Before I got to Don's reply, I already thought rip and crosscut. Rip is parallel to the fence, crosscut is perpendicular to the fence.
Sure, you can rip perpendicular to the fence for short pieces, but that's not what first comes to mind for most people. So, if you're going to write something up and don't want to keep writing parallel (perpendicular) to the fence, just start by writing that for the purpose of your write-up rip = parallel to fence, crosscut = perpendicular. I think almost all readers will grok this instantly and have no problem reading the article. As to +/- directions, I think left/right are probably the terms to use. Hopefully you don't need to describe +/- in the crosscut direction, though away/towards the operator seem unambiguous (unlike forwards/backwards or in/out).


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PostPosted: Fri Aug 05, 2016 8:25 am 
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Lew Hartswick wrote:
The problem with the term rip is, it is a function not a direction. I can rip in both directions on my radial arm saw. The normal
way, of course is parallel to the fence but I have a fixture to hold short pieces with the grain running perpendicular to the
fence and "rip" by pulling the saw. This the way I can get thin pieces without the danger inherent in trying it along the fence.
So to describe the function of the several devices I've come up with I need some terms to describe the directions. :-)
...lew...


Not unique to RAS. You can rip - cut primarily parallel to the grain of the wood, or cross cut basically perpendicular to it, using the fence as an appropriate guide on a tablesaw, too. With plywood, you do both simultaneously!

Since metal is uniform, X,Y and Z are used to designate direction.

I shudder every time someone mentions ripping on a RAS, turning the blade sideways. Seen some nastiness as a result. Messier than TS accidents seen in over 25 years of EMS.


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