|Project by DrDirt||posted 06-30-2015 01:29 AM||1347 views||1 time favorited||8 comments|
So my old sled made of 1/2 inch birch ply (from home center) had developed a bit of a warp to it, such that the two sides of the sled were no longer flush. Saw the article in FWW 244 last October from Marc Adams, and decided it was time.
Made from 3/4 MDF, as well as the fence.
The bottom layer of the fence is 1/2 inch plywood, to hold screws better.
Went with William Ng video on the 5 cut method to square it up.
It is straight to .001 per foot, as seen in the pics, the difference .419 vs .424 is .005 out, but that is 4X the real offset. so since my piece was ~17 inches, my error, is 0.00125/17 inches
More than close enough for woodworking.
first offset was .092 for the 17 inches. used his method with feeler gauges, and went from +.092 to -.022, and ended up at +.005 as a front back difference in cut 5.
The screws in the safety box are #8 by 2 1/2 so there is 3 inches clearance from the table of the sled to the bottom of the screws, while the blade can only stick up 2.35 inches. So regardless of what I do or tilt there is no way to hit the screws.
Sprayed it with some rattle can laquer to make sure it gets a bit of protection from drips of sweat or water droplets bubling the surface. The fence definitely should stay dead flat. Perhaps at some point I might add a T-track from kreg to the top.
-- 'Political correctness is fascism pretending to be manners' ~George Carlin