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Mark Cooper
 
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Default Brand new Grizzly G1023SL table saw, terrible vibration...Help!!

I just purchased my first table saw, a Grizzly G1023SL (220v 1-phase 3HP).

Like most Grizzly owners it seems, mine arrived in a box that looked like it
had been run over by a dump truck. In reality, the guy who delivered it had
an otherwise empty truck, and put the saw in the middle of the damn thing
with NO OTHER SUPPORT!! Bottom line, just a mile from my house he had to
lock up the brakes, and the saw fell over on its side. I believe it hit on
the side with the tilt handwheel, so I THINK the motor didn't absorb the
blow. Aside from this, however, the box had obviously taken numerous other
blows, because it was just about shredded, as was the box the fence was in.

I've got the top off the saw as we speak, and there does not appear to be
any damage to the saw whatsoever...not even a scratch. However, it has an
absolutely TERRIBLE vibration. I put a blade on it and it whistled like a
freight train. I put a Starrett straightedge against the motor pulleys, and
found that the arbor pulleys are about a full quarter inch offset. When I
rotate the arbor, as the belts rotate around the pulleys, it isn't smooth at
ALL. I can feel a continual hesitation, then release, then hesitation, then
release... In addition, the motor comes to a stop almost immediately after
being switched off. Most other saws I've seen rotate for quite some time
before coming to a stop.

So bottom line, what should I do? The obvious thing to do would be to move
the pulleys back into alignment, but I would have to move the arbor the
wrong way, and it looks like the blade would hit the saw. Am I right about
this? Do the two sets of pulleys have to be directly over each other to
quell the vibration?

Any other suggestions would be helpful...I'm not a machinist!!


  #2   Report Post  
James \Cubby\ Culbertson
 
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Default

Contact Grizzly.

Others have described a similar problem and I believe the fix was to adjust
the
pulley's to be in line. Another source of noise/vibration on these saws
has been
a loose belt. In any case, you should be calling Grizzly as this thing is
brand new
and still well within the warranty period. They will give good service.
Cheers,
cc

"Mark Cooper" wrote in message
news:1113355444.e81a10c36261fc05e31f5e61fff8c263@t eranews...
I just purchased my first table saw, a Grizzly G1023SL (220v 1-phase 3HP).

Like most Grizzly owners it seems, mine arrived in a box that looked like
it had been run over by a dump truck. In reality, the guy who delivered
it had an otherwise empty truck, and put the saw in the middle of the damn
thing with NO OTHER SUPPORT!! Bottom line, just a mile from my house he
had to lock up the brakes, and the saw fell over on its side. I believe
it hit on the side with the tilt handwheel, so I THINK the motor didn't
absorb the blow. Aside from this, however, the box had obviously taken
numerous other blows, because it was just about shredded, as was the box
the fence was in.

I've got the top off the saw as we speak, and there does not appear to be
any damage to the saw whatsoever...not even a scratch. However, it has an
absolutely TERRIBLE vibration. I put a blade on it and it whistled like a
freight train. I put a Starrett straightedge against the motor pulleys,
and found that the arbor pulleys are about a full quarter inch offset.
When I rotate the arbor, as the belts rotate around the pulleys, it isn't
smooth at ALL. I can feel a continual hesitation, then release, then
hesitation, then release... In addition, the motor comes to a stop almost
immediately after being switched off. Most other saws I've seen rotate
for quite some time before coming to a stop.

So bottom line, what should I do? The obvious thing to do would be to
move the pulleys back into alignment, but I would have to move the arbor
the wrong way, and it looks like the blade would hit the saw. Am I right
about this? Do the two sets of pulleys have to be directly over each
other to quell the vibration?

Any other suggestions would be helpful...I'm not a machinist!!



  #3   Report Post  
Dave Anderson
 
Posts: n/a
Default

Learn a lesson from this and NEVER accecpt freight damaged shipments!
"Mark Cooper" wrote in message
news:1113355444.e81a10c36261fc05e31f5e61fff8c263@t eranews...
I just purchased my first table saw, a Grizzly G1023SL (220v 1-phase 3HP).

Like most Grizzly owners it seems, mine arrived in a box that looked like
it had been run over by a dump truck. In reality, the guy who delivered
it had an otherwise empty truck, and put the saw in the middle of the damn
thing with NO OTHER SUPPORT!! Bottom line, just a mile from my house he
had to lock up the brakes, and the saw fell over on its side. I believe
it hit on the side with the tilt handwheel, so I THINK the motor didn't
absorb the blow. Aside from this, however, the box had obviously taken
numerous other blows, because it was just about shredded, as was the box
the fence was in.

I've got the top off the saw as we speak, and there does not appear to be
any damage to the saw whatsoever...not even a scratch. However, it has an
absolutely TERRIBLE vibration. I put a blade on it and it whistled like a
freight train. I put a Starrett straightedge against the motor pulleys,
and found that the arbor pulleys are about a full quarter inch offset.
When I rotate the arbor, as the belts rotate around the pulleys, it isn't
smooth at ALL. I can feel a continual hesitation, then release, then
hesitation, then release... In addition, the motor comes to a stop almost
immediately after being switched off. Most other saws I've seen rotate
for quite some time before coming to a stop.

So bottom line, what should I do? The obvious thing to do would be to
move the pulleys back into alignment, but I would have to move the arbor
the wrong way, and it looks like the blade would hit the saw. Am I right
about this? Do the two sets of pulleys have to be directly over each
other to quell the vibration?

Any other suggestions would be helpful...I'm not a machinist!!



  #4   Report Post  
Larry Jaques
 
Posts: n/a
Default

On Tue, 12 Apr 2005 21:25:05 -0400, the inscrutable "Mark Cooper"
spake:

I just purchased my first table saw, a Grizzly G1023SL (220v 1-phase 3HP).

Like most Grizzly owners it seems, mine arrived in a box that looked like it
had been run over by a dump truck. In reality, the guy who delivered it had
an otherwise empty truck, and put the saw in the middle of the damn thing
with NO OTHER SUPPORT!! Bottom line, just a mile from my house he had to
lock up the brakes, and the saw fell over on its side. I believe it hit on
the side with the tilt handwheel, so I THINK the motor didn't absorb the
blow. Aside from this, however, the box had obviously taken numerous other
blows, because it was just about shredded, as was the box the fence was in.

I've got the top off the saw as we speak, and there does not appear to be
any damage to the saw whatsoever...not even a scratch. However, it has an
absolutely TERRIBLE vibration. I put a blade on it and it whistled like a
freight train. I put a Starrett straightedge against the motor pulleys, and
found that the arbor pulleys are about a full quarter inch offset. When I
rotate the arbor, as the belts rotate around the pulleys, it isn't smooth at
ALL. I can feel a continual hesitation, then release, then hesitation, then


That sounds like the belt is trying to jump the groove.


release... In addition, the motor comes to a stop almost immediately after
being switched off. Most other saws I've seen rotate for quite some time
before coming to a stop.


So are the pulleys out of alignment on the same plane (easily
corrected) or are they tracking in two different planes?

---------- __________ easy fix: realign pulleys.


---------- \ not so easy fix. g Motor bracket bent?
\ (OK, so it's a slight exaggeration.)
\
\
\
\
So bottom line, what should I do? The obvious thing to do would be to move
the pulleys back into alignment, but I would have to move the arbor the
wrong way, and it looks like the blade would hit the saw. Am I right about
this? Do the two sets of pulleys have to be directly over each other to
quell the vibration?


I had a vibration developing in my Griz bandsaur. I hadn't gone back
to retighten the bolts after a few hours of use and the motor pulley
had come loose. Tightening the motor pulley set screw took the vibes
away, the easy fix. I also installed a link belt on it and it smoothed
right out.

If moving the arbor causes an interference fit with the blade, _don't_
do it. Instead, I would see about adjusting the motor brackets and/or
motor pulley to line it up. Try that first. Unless the pulleys are
absolutely identical, you'll probably need to align them with the
straight edge against the side of a groove. That's where it counts.


Any other suggestions would be helpful...I'm not a machinist!!


What has the Grizzly technical support guy said?


----------------------------------
VIRTUE...is its own punishment
http://www.diversify.com Website Applications
==================================================
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SonomaProducts.com
 
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Default

Call Grizzly immediately and negotiate a replacement for the entire
saw.

1. If they are sure thet their is no problem with the saw, then there
should be no problem swapping it out.
2. I, personnaly, would be willing to pay the shipping to have it
replaced.
3. Do this now, waiting will only make it harder to do as more problems
creep up and you always wonder if it was the shipping damage.

I honestly believe you could get Grizzly to replace it. Not sure about
the shipping. If they hesitate mention you participation in this forum
and how we are all waiting to hear what they do.

P.S. I am normally not so militant but I like Griz and I'll bet they
will do the right thing.



  #6   Report Post  
 
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Default

Link Belt. Worked amazing for me.

  #7   Report Post  
Mark Cooper
 
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Default

Okay...so here's the latest:

I called Grizzly, and their tech agreed with me that part of the problem was
likely that the pulleys were not in alignment. I'll try to describe a 3-D
situation with a 1-D mind at best, but essentially the pulley shafts were
parallel to each other, but the arbor pulleys were slightly to the side of
(not directly over) the motor pulleys. Graphically, I had this situation:

|
| |
| |
|

instead of this:

| |
| |
| |

By loosening the motor mounts and sliding the motor, I got that fixed.
However, the tech also warned me to check for a bad belt, and sure enough
one of them was. That right there basically cured most of the problem. I
cut that one off, and now I'll either get a new one from Grizz or cut the
other two off and go with links.

I'm pretty much convinced the saw wasn't damaged in the spill, and I think
the saw is now within reasonable tolerances. The tech agreed that, since
the motor didn't take the hit, the spill probably didn't do any damage. He
said I could probably see it if it did, and I've been over it pretty well
and not found anything.

Thanks to everyone for their great suggestions.








  #8   Report Post  
Vic Baron
 
Posts: n/a
Default

Glad to see that Griz was able to help. I had a problem when I initially got
my G0555 bandsaw and they were quick to help. Nice to have a company that
will stand behind their products.

Happy sawdust making!

Vic

"Mark Cooper" wrote in message
news:1113447118.aef798bd13e72033c5da2444bd7078a3@t eranews...
Okay...so here's the latest:

I called Grizzly, and their tech agreed with me that part of the problem

was
likely that the pulleys were not in alignment. I'll try to describe a 3-D
situation with a 1-D mind at best, but essentially the pulley shafts were
parallel to each other, but the arbor pulleys were slightly to the side of
(not directly over) the motor pulleys. Graphically, I had this situation:

|
| |
| |
|

instead of this:

| |
| |
| |

By loosening the motor mounts and sliding the motor, I got that fixed.
However, the tech also warned me to check for a bad belt, and sure enough
one of them was. That right there basically cured most of the problem. I
cut that one off, and now I'll either get a new one from Grizz or cut the
other two off and go with links.

I'm pretty much convinced the saw wasn't damaged in the spill, and I think
the saw is now within reasonable tolerances. The tech agreed that, since
the motor didn't take the hit, the spill probably didn't do any damage.

He
said I could probably see it if it did, and I've been over it pretty well
and not found anything.

Thanks to everyone for their great suggestions.










  #9   Report Post  
SonomaProducts.com
 
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Default

Glad to see all is well. I think the tech was right in having you
check the belts. He likely knows they ship very low quality belts with
their machines.

I was doing maintenance on a new Griz 20"planer that never seemed to
work right. We determined that the outfeed roller was way bent and Griz
sent a new one immediately. As part of the replacement process I found
that one of the three "new" belts that came on the machine was already
broken and another one was shredding. The machine had less than two
hours of op time. In addition to replacing the outfeed we went to an
auto shop and got three new high quality belts. I also aligned the
pullys which were out of alignment (not enough to damage a good belt).
The shop owner though I was a genius when the planer now worked
properly AND no longer had such loud belt slap and hum as it did with
the cheapo belts that came with the unit.

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