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Drum sander burn

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Forum topic by Glen posted 473 days ago 851 views 0 times favorited 13 replies Add to Favorites Watch
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Glen

98 posts in 1674 days


473 days ago

Topic tags/keywords: question

I was running an oak board through my Craftsman drum sander at the 5 speed setting when a black crayon looking line appeared down the length of it. I ran the board through about 5 or 6 times before the mark appeared. I was turning the table height adjustment up about a quarter of a turn each time. I was using 120 grit resin bond aluminum oxide cotton cloth open sandpaper on the machine at the time. There is something on the sandpaper which caused the mark. Here is a picture. http://pinterest.com/pin/292593307011084838/
What would have caused this to get on the sandpaper? Was the speed too fast or slow? Wrong type of sandpaper?

Glen

-- Glen


13 replies so far

View Fred Hargis's profile (online now)

Fred Hargis

1643 posts in 1090 days


#1 posted 473 days ago

Your link didn’t work, but what you saw is fairly common. Some tips (without guessing what caused the problem): slow down the feed, take a lighter cut, and clean your belts often with one of the gum type cleaners. One pother thing, this will be more common without good DC, so if you don’t have that, triple all the earlier points. You may be able to save your belt by cleaning the burned streak off. I’ve numerous methods and never found any that worked as well as I like, so I just replace it and move on. A popular one is soaking it in Simple Green. Like I said, it didn’t work that well (IMHO). My sander is a Delta, and I’m not familiar with your model…..but those tips almost always solve it. Another tip might have been use a coarser grit (most people see it with 180 or so) but I run 120 all the time now, but almost never go finer than that.

-- I long for the days when Coke was a cola, and a joint was a bad place to be (Merle Haggard)

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Glen

98 posts in 1674 days


#2 posted 473 days ago

Fred,
I changed the picture link. It should work now. In your reply what does DC mean? Thanks for the help.

Glen

-- Glen

View JustJoe's profile

JustJoe

1554 posts in 635 days


#3 posted 473 days ago

DC – dust collector and my performax will burn some woods to a crisp if I don’t hook up the DC. The paper just clogs faster and then it’s sawdust embedded in the paper rubbing on the workpiece = burn marks.

-- This Ad Space For Sale! Your Ad Here! Reach a targeted audience! Affordable Rates, easy financing! Contact an ad represenative today at JustJoe's Advertising Consortium.

View Loren's profile

Loren

7230 posts in 2245 days


#4 posted 473 days ago

You need a crepe rubber block. Black streaks are caused by
wood pitch glazing onto and then heating up on the drum
and spreading on the work.

-- http://lawoodworking.com

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Loren

7230 posts in 2245 days


#5 posted 473 days ago

Glazed wraps can be soaked in hot, soapy water and scrubbed
with a soft bristle brush to get the glaze off. If you let it go too
long on the drum, the rubber won’t get it off.

-- http://lawoodworking.com

View AandCstyle's profile

AandCstyle

1244 posts in 854 days


#6 posted 472 days ago

This is a common problem with drum sanders. In addition to taking lighter cuts, you can also let the wood and the drum cool between passes. HTH

-- Art

View gfadvm's profile

gfadvm

10539 posts in 1287 days


#7 posted 472 days ago

1/4 turn is a pretty heavy cut and probably caused this. I soak strips with glazed stripes like your overnite in Simple Green, then spray em off with hot water and they usually come clean.

-- " I'll try to be nicer, if you'll try to be smarter" gfadvm

View JL7's profile

JL7

6985 posts in 1562 days


#8 posted 472 days ago

My guess is your paper got overlapped…...keep the paper tight and really shallow cuts…...and keep it clean….that’s the ticket…

-- Jeff - I have not failed. I've just found 10,002 ways that won't work.

View Thalweg's profile

Thalweg

69 posts in 2003 days


#9 posted 472 days ago

I’ve found that sappy woods seam to burn/clog worse. Particularly pine and fir. I never thought about soaking the belts. I’ll give that a shot.

View bannerpond1's profile

bannerpond1

220 posts in 496 days


#10 posted 471 days ago

I have a Jet 16-32 which will burn the wood if I try to take off too much. I only take off one eighth of a turn and then I run it through at least two more times, moving it across the belt if it’s a narrow enough board. The multiple passes seem to remove scratches from the first pass and it will take out the burn marks, too. When I started, I had LOTS of trouble with this tool. My problems were either trying to take off too much wood on a pass or not having the paper tight on the drum. If it’s not tight, it can overlap and give you a burn there. JL7 said the same, only he didn’t take so long.

Hope this helps.

-- --Dale Page

View Glen's profile

Glen

98 posts in 1674 days


#11 posted 471 days ago

I think the problem may have been from taking too much off at a time. The sandpaper was not overlapped anywhere on the drum so I don’t think that was the problem. Another cause may have been from too much dust built up on the inside of the machine (even though I was using my dust collector). I may have to vacuum out the inside of it often and raise the feed table up 1/8 of a turn at a time instead of 1/4. Thanks to all of you for the advice!

-- Glen

View runswithscissors's profile

runswithscissors

894 posts in 622 days


#12 posted 471 days ago

I too have had this problem with my Performax 16-32. Apparently there is a lot of heat build up with a drum sander. I surmise that this is one of the main advantages of a wide belt sander—the belt has time to dissipate heat as it makes its way around the drums.

View Arron's profile

Arron

12 posts in 621 days


#13 posted 471 days ago

I find the best way to clean off these marks is to use oven cleaner , let it work, then blast off with a water blaster (pressure washer). Will get the belt clean like new.

-- Sydney, Australia, www.bespokeboxes.com.au

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