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I've had my G1023 up and running now for a couple of months and have
run a couple hundred board feet through it. In general I'm happy with
the purchase and consider any problems I have making absolutely square
cuts to be the problem of the operator and not the tool.

Today as I was changing out a blade when I lowered it all the way down
I noticed that the blade slowly rotated about an inch or two as it reached
the bottom of the travel. I had never seen it do that before. I then
turned on the saw and the motor made noise, but the blade didn't turn.

I raised the blade, it rotated back as it came off the bottom of travel,
and turned on the saw and the blade spun as normal.

Given that I was watching closely, I also think I saw a position along
the vertical travel where the blade would deflect slightly to the left
and then come back to 90 degrees as it travels vertically through a
certain position. I presume this might be distinct and separate from
the first problem described.

Anybody have any idea what might wrong.
 

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Discussion Starter · #3 ·
Went out and vacuumed out all the dust from the cabinet and the poked
around at the belt with the saw unplugged.

If I lower the blade while rotating the belt at about 1 inch above
the table, the belt encounters a blockage. Gently pulling at it,
rocking it back and forth makes a distinct knocking sound and
it will go no further. I haven't been doing any cutoffs lately that
would be small enough to fall down through the insert and the
sound seems more metallic than wood, and there's no give at
all when it makes contact.

Unfortunately there's really no way that I can see to get any
visibility into what might be down there without taking the motor
off.

Sigh. Project on hold until I get this fixed. This is my first real
table saw (always owned bench models in the past), and it's
somewhat disappointing to see something break/come apart with
only 3 or 4 sheets of plywood plus miscellaneous stuff through
the saw. I am very careful with it and am certain that I did not
drop anything down there.

Guess I'll have to wait for Grizzly customer support to reopen.
 

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Discussion Starter · #5 ·
gfadvm, I'm learning that woodworkers spend more time making tools to make stuff than actually making said stuff. That's an excellent idea which I'll be implementing tomorrow. In the meantime in order to make one cabinet I've made a router circle cutting jig, a thein separator, a jig for constructing a wood storage shelf, the wood storage shelf, an assembly/outfeed table, a biscuit joiner jig, the list goes on… And the wife wonders why it's taken two months for the cabinet.
 

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Discussion Starter · #7 ·
Last weekend the problem mysteriously disappeared.

It returned to haunt the machine this afternoon. I made a video
that demonstrates what's going on.


You can hear in the video something knocking and yet I can't
see anything but haven't yet taken the motor off.
 

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Does it happen without the blade installed? Does it happen without the belt installed? Can you get someone else to spin the blade while you look and listen from inside?
 

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It does happen without the blade installed. Haven't taken
off the belt yet. I was able to get a pretty good view with
the cell phone camera and can't see any obstructions.

I'd assume it's in the bearings or motor except for the fact
that it's position dependent. Raising the blade removes
the obstruction. Lowering it eventually completely binds
the blade so it won't move at all. And when it's obstructed
turning on the motor results in no movement of the blade,
so whatever it is, it's quite strong.

But it doesn't feel like a piece of wood when it hits
the obstruction and in the video you can hear the sound.
Does that sound like wood or metal? I would lean towards
metal.
 

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Hi Skate, I noticed in your vid, you still had the cover plate in place. Remove that and you'll be surprised at what's visible from the top. You might find your problem there. ........... Jerry (in Tucson)
 

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Whatever is causing the stoppage, it seems very solid. I'd be worried you have a bearing going bad on either the spindle or in the motor. If the cage separating the balls inside of a bearing falls apart, the balls can hit each other and sometimes cause a shaft locking effect. This usually doesn't go by without a significant noise that no one would confuse as being normal. A screw backing out of one of the sheaves and hitting something could be a possibility too.
 

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Hey Jerry, I should have mentioned that 10 days ago when I first posted about the
problem I did remove the insert and had a look around and there was nothing
that could have caused this problem visible. I should have remembered to remove
the insert prior to making the video though just to preempt this line of reasoning.

I'll let you all know what Grizzly says tomorrow. I'm hoping they don't say
corporate policy blocks youtube in the tech support department. :)

Thanks for all the suggestions.
 

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Discussion Starter · #17 ·
Well that's disappointing. They said corporate policy blocks youtube
in the tech support department. Well they didn't say that exactly
but they said they had no way of looking at any online videos, either
youtube or google drive stored videos.

In this day and age, you'd think that would be a pretty basic and
effective way to diagnose problems and Grizzly would find real value
in making their customers satisfied by being able to use common
tools to help diagnose problems.

I tried to explain what was happening but that only went so far
before I was repeating myself, stopping, backing up, clarifying, etc…
Maybe it's me and I just have poor verbal skills.

So now we send the video off to Grizzly via email. The video itself.
No URL's to online storage of the video are allowed. And wait 24
to 48 hours for a response.
 

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It could be something that's fan related inside the fan cover. That cover will come off easily by removing a few screws. Check if the fan blades are hitting something when it spins. That'll at least eliminate one of the simple causes (or cure it).
 

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Discussion Starter · #19 ·
After reviewing the video Grizzly thinks the bottom
pulley is out of position, which leads them to believe
a set screw might be loose and binding on the casting
as the assembly is lowered.

This explanation really does make sense. Apparently
requires taking the table top off for repair (ouch).
 
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