scottp55
07-14-2014, 07:41 AM
I had a 17X34X1.84" quilted slab that had a 1/2" bow I had to get rid of, while leaving the cup on the top(so pencils/bits/etc will roll towards center of shelf---also had a 1/4" lengthwise warp I wanted to keep for same reason).
I got the good 1/4" out of it with the Bosch 4X24 at 80G, but one of the wheelchairs brakes is broke-so had to hold my left wheel to keep from taking a ride:) My right hand and arm gave out and it looked like it would fit with my shortest 3/4" straight in the spindle.
In the first pic(even after using a low angle Jack plane to get the worst out-when you see grain, you'll see why I didn't try to get into the flat-even my low angle Skew block was having problems-and you could shave with them), slab was resting firmly on 3 points, so I wedged floating corner.
No thickness sander and wouldn't trust it with a planer. Not enough Z to put it on 3/4" 0r 1/2"ply bed, and didn't have any 1/4" big enough.
I Thought zeroing to spoilboard would give the best results. Had to mess with safe Z's as .25" in VCP as it kept hitting topZ prox.
Wound up taking .22" off first section(boundary box was 12.5X 18.2).
I slid it forward, and rewedged same gap that showed(Mistake it turns out), and first cut(.05") on the left side was .03" DEEPER than than the previous .22"!
Went around back rewedged opposite corner and then took it down in stages until my 4' level showed me I was close.
I THINK I should have used Shopbot and shim gauge/paper to level slab with shims before starting second cut?
It's only my second attempt at feeding stock through Y-axis, but I have a lot more of same thickness material I would like to use(None as twisted as this-which is why I used it).
Z-ing to top of material would have been Very tight, but would that have been better?
Just wondering what I should have done different for more consistent results?
Will look for a different bit less CEL and overall length.
Long winded as usual.
I got the good 1/4" out of it with the Bosch 4X24 at 80G, but one of the wheelchairs brakes is broke-so had to hold my left wheel to keep from taking a ride:) My right hand and arm gave out and it looked like it would fit with my shortest 3/4" straight in the spindle.
In the first pic(even after using a low angle Jack plane to get the worst out-when you see grain, you'll see why I didn't try to get into the flat-even my low angle Skew block was having problems-and you could shave with them), slab was resting firmly on 3 points, so I wedged floating corner.
No thickness sander and wouldn't trust it with a planer. Not enough Z to put it on 3/4" 0r 1/2"ply bed, and didn't have any 1/4" big enough.
I Thought zeroing to spoilboard would give the best results. Had to mess with safe Z's as .25" in VCP as it kept hitting topZ prox.
Wound up taking .22" off first section(boundary box was 12.5X 18.2).
I slid it forward, and rewedged same gap that showed(Mistake it turns out), and first cut(.05") on the left side was .03" DEEPER than than the previous .22"!
Went around back rewedged opposite corner and then took it down in stages until my 4' level showed me I was close.
I THINK I should have used Shopbot and shim gauge/paper to level slab with shims before starting second cut?
It's only my second attempt at feeding stock through Y-axis, but I have a lot more of same thickness material I would like to use(None as twisted as this-which is why I used it).
Z-ing to top of material would have been Very tight, but would that have been better?
Just wondering what I should have done different for more consistent results?
Will look for a different bit less CEL and overall length.
Long winded as usual.