Follow up question: How could you get the short fence parallel to the saw blade?
Simon
Follow up question: How could you get the short fence parallel to the saw blade?
Simon
Good stuff Jack!
Lee Schierer
USNA '71
Go Navy!
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I've just modified my fences to use an extrusion like the Euro sliders. You can slide the fence to match your needs for each cut. They are always parallel once adjusted and not difficult to add to an existing fence. I do the same thing to my resaw bandsaw fence. I run a Bies with a high fence that can be moved or removed. Dave
Could you please elaborate?
I could use the saw fence which is parallel to the saw blade as a guide, but I am hoping for a method that dispenses with measuring if possible, keeping measurement inaccuracy to a minimum.
In addition, Jack uses the jig to "rip strips as small as .025" one tenth the thickness of 1/4"; I wonder if he might have a clever way of doing his set-up precisely. so the strips are cut to uniform thickness.
Simon
SM--simply rip a piece of scrap as a spacer to align the table slot runner to the edge of the jig, which was made parallel to the blade slot by the use of the fence.
"Anything seems possible when you don't know what you're doing."
Thanks for posting about that jig, Jack. Looks like something I'll make use of, as opposed to the usual SawStop thread noise.
photo3_zps4ed994a1.jpg
this is the under side of the fixture with a runner that fits the t slot of the saw. this edge is parallel to the blade and flat stock . a simple sliding t square (better still a digital caliper) from this edge keeps thing running smooth and parallel . large holes with headed screws allow for fine adjustment .
jack
English machines
A bit of history on the saw guarding . Not that new !!
Well designed riving knives started to come into UK before WWI (1901) such as this M Glover & Co patent rip saw guard as an after market safety devise. that became mandatory on rip saws in the late 1920?
and this 1906 write up in Engineering Weekly, 05 Jan 1906, pg 17
Some very serviceable features have been incorporated in the improved design of saw-bench illustrated below. The frame is made all in one casting. The table top rises and falls, being carried by four turned rack pillars which slide in four corner brackets machined to receive them, and cast solid with the frame.
The bearing nearest the saw is fixed upon strong brackets cast in the frame and can be bodily removed and replaced in a few minutes. A massive bracket carries bearing for spindle outside the pulleys, which rests on a ledge, and is not only bolted to the frame but extends to the floor as an extra foot.
The bearings are fitted with interchangeable and reversible brasses. The spindle is of steel with lock-nut arrangements for at once taking up the wear and rattle which otherwise frequently annoy and interfere with good work. The loose pulley is about 1 in. in diameter less than the fast pulley, but has a taper flange leading up to the larger fast pulley so that the belt never hesitates to work from one to the other. This device allows the belt to be slack when on loose pulley, which lengthens its life and saves the bush of the loose pulley considerably, besides insuring the belt always being tight in work on the fast pulley.
The belt guide is worked from the front, close to the operator's hand and automatically fixes itself, thus it cannot be moved except deliberately, and it is impossible for the belt to get on to the wrong pulleys and cause accident.
The guide fence can be swiveled to any angle; it is specially well supported, being capable of taking in wide sawing and has also a fine screw adjustment for most accurate work; it also swings quite out of the way leaving the bench top free for wide or curve sawing.
The table-top can be fitted with extra sliding fence for angle work, which may at once be adjusted to an index and speedily removed. The gearing is neatly enclosed inside the frame, being thus protected from the sawdust, and out of the sawyer's way.
GloversPatentIdealSawGuardFig60_zpsaa777e67 (1).jpg
these illustration are in a book published in 1902-1904 called " The Modern Carpenter & Jointer" [2] and illustrate "best safe practice" of the period. See also the short rip fence which became standard British practice for rip saws after the 1897 "workmen Compensation Act" [1] in the UK the over head crown was mandatory by the late 20s and all saw makers supplied the short rip riving knife and guard on new rip saws.
here is one on a Stenner and Gun
In conclusion i think it was M golver & co of Leeds that are responsible for the earliest guards in the UK
[1]http://en.wikipedia.org/wiki/Workmen...ation_Act_1897
[2]http://catalog.hathitrust.org/Record/011827617
http://www.gracesguide.co.uk/M._Glover_and_Co
this post is just for entertainment meant and in hopes of not spreading any miss information )
jack
English machines
Clear now. Thanks,
Simon