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Forum topic by fatty posted 02-14-2013 06:26 AM 442 views 0 times favorited 2 replies Add to Favorites Watch
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fatty

9 posts in 675 days


02-14-2013 06:26 AM

Looking for an explanation…tonight I attempted to flatten an end-grain cutting board on my buddies drum sander. After getting to that point in which I thought it should be flat, it wasn’t. It appeared there were one set of diagonal corners that continued to rock when placed on a flat surface. I was not able to correct this even after several more passes on both sides. I have never had this happen in the handful of times I have used this sander. After scratching my head a bit, I ran a 5/4 rough piece of walnut through the sander several times…and as luck would have it, it was perfectly flat! So is it the cutting board that is causing the problem??? I’ve run end grain boards through this same sander in the past and never had this problem…


2 replies so far

View FreshSawDust's profile

FreshSawDust

66 posts in 996 days


#1 posted 02-15-2013 08:37 PM

A sander like a planer will not do much to remove a twist like that. You could use a carrier board like 3/4” plywood with shims like a planer sled (do a quick search on here if unsure) to flatten one side then you can flip it over.

-- TJ - Perryville, Missouri

View Cosmicsniper's profile

Cosmicsniper

2199 posts in 1825 days


#2 posted 02-15-2013 08:46 PM

The twist should average out over multiple runs on both sides, especially if it doesn’t rock on the conveyor belt. If it rocks, wedge up a corner as you run it through…repeat on the same corner, if necessary.

Be sure you are not putting pressure on the belt yourself as the work goes through. I sometimes think I need to help it a bit when I take too big a bite and I end up inducing some error from flexure.

-- jay, www.allaboutastro.com

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