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Grizzly 24" Drum Sander Issues

by LaneLaser
posted 01-26-2017 05:09 PM


10 replies so far

View ClammyBallz's profile

ClammyBallz

449 posts in 1523 days


#1 posted 01-26-2017 07:03 PM

I’ve never had a board shoot out on my drum sander, that’s some scary stuff. If the conveyor belt is worn, I’d start with a new one. I know Industrial Abrasive can custom make on for you. After you get a new belt on there, I’d run two 1” strips of wood through the sander, one on the left, one on the right, and measure the thickness of each. If they don’t match up, align the drums.

It’s possible you were taking too much off at one time in conjunction with a worn belt. I like to feed the piece through on the conveyor while the drum is off, then lower the drum until it just about touches the surface. Each pass I lower it .005”. This varies based on grit, wood type and board width, but it’s a good starting point.

View dbray45's profile

dbray45

3320 posts in 3163 days


#2 posted 01-26-2017 08:05 PM

Are the drum and belt going in the correct directions. If the belt and drum are both going in the same direction, it could easily come out like a rocket. If the belt is loose or the the drive belt for the belt is loose, same thing.

Taking too deep of a cut or not deep enough can have to same effect.

May want to give Grizzly a call and see if you can get the owner’s manual. I would start there.

-- David in Damascus, MD

View AZWoody's profile

AZWoody

1449 posts in 1610 days


#3 posted 01-26-2017 08:37 PM

I have an General which is effectively the same sander. After putting the hook and loop kit on, you’re effectively making the drum wider. Mine was originally designed to use standard sandpaper rolls so I needed to adjust the pressure rollers farther down to press the material down to the feed belt a little more.

As for the feed belt, even with the rollers being adjusted right, you still might have a bad belt but as long as the rubber feels “rubbery” and not hard and cracked I would think you’re still fine.

View AZWoody's profile

AZWoody

1449 posts in 1610 days


#4 posted 01-26-2017 08:39 PM

double post

View Bill White's profile

Bill White

5205 posts in 4347 days


#5 posted 01-26-2017 08:41 PM

I guess that you have not contacted Grizz tech services…..........................
Bill

-- [email protected]

View LaneLaser's profile

LaneLaser

7 posts in 1756 days


#6 posted 01-26-2017 09:30 PM



I guess that you have not contacted Grizz tech services…..........................
Bill

- Bill White

I have not contacted Grizzly yet. I will definitely do that next.


I ve never had a board shoot out on my drum sander, that s some scary stuff. If the conveyor belt is worn, I d start with a new one. I know Industrial Abrasive can custom make on for you. After you get a new belt on there, I d run two 1” strips of wood through the sander, one on the left, one on the right, and measure the thickness of each. If they don t match up, align the drums.

It s possible you were taking too much off at one time in conjunction with a worn belt. I like to feed the piece through on the conveyor while the drum is off, then lower the drum until it just about touches the surface. Each pass I lower it .005”. This varies based on grit, wood type and board width, but it s a good starting point.

- ClammyBallz

I did look into belts at Grizzly and they are like $375 which is almost as much as I paid for the machine so I was thinking that wasn’t going to happen. I will contact Industrial abrasives and see what they would charge.


I have an General which is effectively the same sander. After putting the hook and loop kit on, you re effectively making the drum wider. Mine was originally designed to use standard sandpaper rolls so I needed to adjust the pressure rollers farther down to press the material down to the feed belt a little more.

As for the feed belt, even with the rollers being adjusted right, you still might have a bad belt but as long as the rubber feels “rubbery” and not hard and cracked I would think you re still fine.

- AZWoody

Ok I never really thought that would make enough difference but you may be right. I will adjust the rollers. As for the conveyor belt it’s sorta rubbery but has some tears and it’s pretty slick, not really rubbery anymore. I venture to say this machine is about 20 years old.


Are the drum and belt going in the correct directions. If the belt and drum are both going in the same direction, it could easily come out like a rocket. If the belt is loose or the the drive belt for the belt is loose, same thing.

Taking too deep of a cut or not deep enough can have to same effect.

May want to give Grizzly a call and see if you can get the owner s manual. I would start there.

- dbray45

The belt and the drum are going in the same direction however I don’t believe there’s a way to reverse the direction of the drum… maybe when I call Grizzly they can tell me that as well.

Thanks everyone for the responses so far.

View LaneLaser's profile

LaneLaser

7 posts in 1756 days


#7 posted 01-27-2017 04:10 PM

Update:
I called Grizzly and after several times calling (their phone system is wacked) they were sorta helpful. Bob from Tech support didn’t seem to know much about the machine he was referring only to the manual. But, he did suggest that I raise the drums or lower the feed rollers first. Too much drum and not enough feed roller can cause a pitching machine effect… He also said that I should replace at some point the conveyor but more than likely it’s the feed rollers not being below the drum enough. Thank you everyone for your responses and suggestions. I love this site and everyone’s willingness to help out fellow woodworkers.

View dbray45's profile

dbray45

3320 posts in 3163 days


#8 posted 01-27-2017 06:54 PM

I didn’t know it had feed rollers – that makes sense

-- David in Damascus, MD

View runswithscissors's profile

runswithscissors

3039 posts in 2411 days


#9 posted 01-28-2017 04:41 AM

Shouldn’t the drum and feed belt be going in opposite directions?

-- I admit to being an adrenaline junky; fortunately, I'm very easily frightened

View LaneLaser's profile

LaneLaser

7 posts in 1756 days


#10 posted 01-30-2017 04:29 PM

runwithscissors there are rollers to hold the material down and that’s why they are ok to go in the same direction.

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