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belt sander sanding problem

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Forum topic by 12bar posted 01-19-2018 07:06 PM 746 views 0 times favorited 27 replies Add to Favorites Watch
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12bar

21 posts in 672 days


01-19-2018 07:06 PM

Topic tags/keywords: sanding belt belt sanding problem

I have a Grizzly 6×48 belt and disk sander that I acquired a while ago. I put Abranet 120 grit paper on the belt and am having a problem when I put the piece of wood up to the sanding paper. The sander is vertical if that makes a difference. When I start to bring the wood in contact the wood bounces up or back . So it is not running smoothly. I am not pushing with any force into the belt.

I went to Abranet Mesh because while taking a luthier course on building an acoustic guitar there was very little dust and the finish on things like braces were ready to be cemented to the backs and top.

In reviewing the manual the only thing I can see that might have anything to do with the problem is one section talked about there being no more than 1/16 of between the belt and the table which the wood is resting on. It said if there was more than the 1/16 of an inch there was “a risk of in-running NIP (pinch) points .

What does this mean? Further, can folks suggest what my problem might be and what I might do about it as I really like the Abranet Mesh sanding belts that I have used on another luthiers 6×48 belt sander.

Thank you for any suggestions you may have.
12 Bar


27 replies so far

View Andybb's profile

Andybb

1274 posts in 747 days


#1 posted 01-19-2018 07:11 PM



the wood bounces up or back

Not sure what that means. Pictures??

-- Andy - Seattle USA

View 12bar's profile

12bar

21 posts in 672 days


#2 posted 01-19-2018 10:08 PM

I can not take a picture of the wood bouncing as I’m holding it at the time. Maybe if I had said it is like it is kicking back that might have helped.
It doesn’t just do it once but if I continue to hold the wood to the Abranet Mesh it continues to keep kicking back at me. It doesn’t kick back hard enough that I can’t hold it but it makes sanding quite difficult.
Where the Manual said there should not be more than 1/16 inch between the sanding table and the rotating Abtranet Mesh I have about 5/32 space. This space being from the end of the table with the miter slot in it to where the Abranet Mesh belt is rotating.
Hope that helps.
I’m also wondering if the kick back could be from the tape on the back of the Abranet Mesh but that seems to be the only thing that is holding the belt together.
U like most sanding belts there are no arrows on the inside of the belt to show which direction the belt should be put on for correct rotation.

View Jim Finn's profile

Jim Finn

2679 posts in 3065 days


#3 posted 01-19-2018 10:25 PM

Sounds to me that your fence is not 90 degrees to the belt. Check it. Try applying the wood to the sander , holding it above the fence.

-- No PHD just a DD214 Website> craftingcouple.com

View 12bar's profile

12bar

21 posts in 672 days


#4 posted 01-19-2018 11:02 PM

Edit (for another 60 minutes) I can not take a picture of the wood bouncing as I’m holding it at the time. Maybe if I had said it is like it is kicking back that might have helped.
It doesn’t just do it once but if I continue to hold the wood to the Abranet Mesh it continues to keep kicking back at me. It doesn’t kick back hard enough that I can’t hold it but it makes sanding quite difficult.
Where the Manual said there should not be more than 1/16 inch between the sanding table and the rotating Abtranet Mesh I have about 5/32 space. This space being from the end of the table with the miter slot in it to where the Abranet Mesh belt is rotating.
Hope that helps.
I’m also wondering if the kick back could be from the tape on the back of the Abranet Mesh but that seems to be the only thing that is holding the belt together.
U like most sanding belts there are no arrows on the inside of the belt to show which direction the belt should be put on for correct rotation.

View bigblockyeti's profile

bigblockyeti

5224 posts in 1864 days


#5 posted 01-19-2018 11:03 PM

^ +1, Take the belt off and make sure the table is 90° to the platen.

-- "Lack of effort will result in failure with amazing predictability" - Me

View 12bar's profile

12bar

21 posts in 672 days


#6 posted 01-19-2018 11:31 PM

Checked trying to hold the wood off the table and it still kicked back and there is like a slapping sound. Also checked the table to square with the sanding base plate which the Abranet Mesh rides on . Using a square against my Incra miter Fence and table with the square to the the plate over which the Abranet rides and it is square. I have 5/32 space on each end between the ends of the table and the belt.
So maybe the problem is the space between the table and the belt since it said it shouldn’t be more than 1/16 of an inch. However that doesn’t explain why I get a pushing back and forth and a slapping sound when I try holding the wood to the belt above the table.
Just has me stumped completely.
Maybe I should try a regular type of 6×48 sanding belt. When I got the belt sander the belt on it was shot so I changed it to an Abranet Mesh belt and immediately starting having this problem.

View bandit571's profile

bandit571

21272 posts in 2827 days


#7 posted 01-19-2018 11:47 PM

The “slapping” sound is the joint in the paper…..

-- A Planer? I'M the planer, this is what I use

View MrUnix's profile

MrUnix

6926 posts in 2342 days


#8 posted 01-19-2018 11:49 PM

Sounds like a bad belt. The distance from the fence/table to the belt should not make any difference. Hold a gauge off the table to the belt and see what kind of measurements you get as you turn it by hand. It should be fairly uniform without much deviation. If you get a large deviation at any one point – that will do it.

Cheers,
Brad

-- Brad in FL - In Dog I trust... everything else is questionable

View LesB's profile

LesB

1816 posts in 3587 days


#9 posted 01-20-2018 12:03 AM

I think I know the “bounce” or chatter you are talking about. I get it occasionally on my sander and it occurs mostly when I’m sanding end grain or a combination of end and long grain. I can over come it by bringing the piece slowly but firmly into contact with the belt. I do not use a fence which can also contribute to the chatter by creating a bit of a pinching affect, especially if the piece is not resting evenly and firmly on the belt.

-- Les B, Oregon

View Richard Lee's profile

Richard Lee

167 posts in 919 days


#10 posted 01-20-2018 12:06 AM

Belt running the right direction ?

View Jim Finn's profile

Jim Finn

2679 posts in 3065 days


#11 posted 01-20-2018 01:22 AM

Belt tension enough?

-- No PHD just a DD214 Website> craftingcouple.com

View alittleoff's profile

alittleoff

541 posts in 1420 days


#12 posted 01-20-2018 01:46 AM

However that doesn’t explain why I get a pushing back and forth and a slapping sound when I try holding the wood to the belt above the table.

Sounds like your not laying it flat on a table. If your holding it off the table in your hands and it’s not striaght and level it will kick back at you, up, or sideways depending on how your holding it.
Gerald

View DMiller's profile

DMiller

409 posts in 616 days


#13 posted 01-20-2018 02:14 AM



I have a Grizzly 6×48 belt and disk sander that I acquired a while ago. I put Abranet 120 grit paper on the belt and am having a problem when I put the piece of wood up to the sanding paper. The sander is vertical if that makes a difference. When I start to bring the wood in contact the wood bounces up or back . So it is not running smoothly. I am not pushing with any force into the belt.

I went to Abranet Mesh because while taking a luthier course on building an acoustic guitar there was very little dust and the finish on things like braces were ready to be cemented to the backs and top.

In reviewing the manual the only thing I can see that might have anything to do with the problem is one section talked about there being no more than 1/16 of between the belt and the table which the wood is resting on. It said if there was more than the 1/16 of an inch there was “a risk of in-running NIP (pinch) points .

What does this mean? Further, can folks suggest what my problem might be and what I might do about it as I really like the Abranet Mesh sanding belts that I have used on another luthiers 6×48 belt sander.

Thank you for any suggestions you may have.
12 Bar

- 12bar

I do a decent amount of sanding with my 4×24 clamped to a table; every so often I have the wood “bounce back” because I wasn’t applying enough force, and/or the sander has begun rocking on the table (if I am understanding your problem correctly). DO you happen to have a new belt, that is not abranet to try and see if it is user mistake, bad sandpaper, or a problem with the machine? Whenever I have had this problem, I have found I just wasn’t pushing hard enough against the sander with the wood. This is the best explanation I have, hope I am understanding the problem correctly. Hope this helps, Dale.

-- Dale Miller Modesto, CA "I can do all things through Christ, which strengtheneth me." Philippians 4:13. "Woodworking minus patience equals firewood."

View 12bar's profile

12bar

21 posts in 672 days


#14 posted 01-20-2018 03:02 AM



Checked trying to hold the wood off the table and it still kicked back and there is like a slapping sound. Also checked the table to square with the sanding base plate which the Abranet Mesh rides on . Using a square against my Incra miter Fence and table with the square to the the plate over which the Abranet rides and it is square. I have 5/32 space on each end between the ends of the table and the belt.
So maybe the problem is the space between the table and the belt since it said it shouldn’t be more than 1/16 of an inch. However that doesn’t explain why I get a pushing back and forth and a slapping sound when I try holding the wood to the belt above the table.
Just has me stumped completely.
Maybe I should try a regular type of 6×48 sanding belt. When I got the belt sander the belt on it was shot so I changed it to an Abranet Mesh belt and immediately starting having this problem.

- 12bar


View 12bar's profile

12bar

21 posts in 672 days


#15 posted 01-20-2018 03:07 AM

There are no arrows as to how the Mesh should turn. I did try reversing it and it is still doing the same thing.
Also makes no difference is how softly I put the wood up to the belt. Once it touches the belt the slapping, pushing back from the belt, whatever we call it is still the same.
Tomorrow I will try a regular belt and I will also measure the belt by turning it by hand and see if it could be the tape that holds the belt together.
Thanks for all the suggestions but nothing so far seems to be the problem that I have tried.

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