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Grizzly Jointer G0609X motor slowing noises and vibration

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Forum topic by Newbie17 posted 11-17-2019 02:58 AM 818 views 0 times favorited 7 replies Add to Favorites Watch
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Newbie17

29 posts in 1027 days


11-17-2019 02:58 AM

Another machine question(s).

https://youtu.be/s8VvLOT0X7U

The jointer seems to vibrate a little more than I would expect during operation, so I went to the manual and check everything it suggested including the pulley set screws, one of which was loose. After all adjustments were made, it still vibrates during operation and shudders when the motor is slowing along with what I would think are not normal sounds. If you listen carefully when it has slowed down a lot, the unevenness can be heard.

I plan to call Grizzly on Tuesday, but wondered what you all thought. Is all of this normal? Are there bearing issues? Did I miss something?

Other info:
1) The jointer top is level in all directions.
2) All screws, bolts and nuts are tightened
3) The belt doesn’t seem loose
4) I can’t be sure it the pulleys are perfectly in line with each other because of the location of the machine in the shop and accessibility to view them while holding a straight edge and feeler gauge. There does not appear to be abnormal nor increased wear on the belt.
5) There are two set screws on the motor pulley. One was sitting on the panel/door ledge, not in use, so I screwed it in, but that didn’t change anything.


7 replies so far

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Aj2

2573 posts in 2364 days


#1 posted 11-17-2019 04:31 AM

Sure sounds like a loose pulley. Sometimes they double stack them so make sure you tighten the one at the bottom of the hole.

Good
Luck

-- Aj

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splintergroup

3071 posts in 1788 days


#2 posted 11-17-2019 03:51 PM

In my experience, a vibration while slowing down (occurs during a narrow RPM range) is usually tracked to a fluttering belt. Aj knows what evil lies in set screws, sometimes there is the inner set screw to lock the pulley to the shaft and the outer screw (in the same hole) to lock down the inner screw.

Be sure the set screw is centered on the motor shaft flat, often when they are loose, the pulley will rotate on the shaft slightly so tightening the set screw won’t work until the flat is properly re-aligned.

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Aj2

2573 posts in 2364 days


#3 posted 11-17-2019 05:24 PM

Yep splinters is correct.
I had forgot about that the set screw might not be on the flat spot anymore.

Good Luck

Good one splinter :)

-- Aj

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Newbie17

29 posts in 1027 days


#4 posted 11-18-2019 04:33 PM

There wasn’t piggybacked set screws. I can’t see a flat spot under the set screw, so I guess I’ll have to take the pulley off to find it.

Added: I noticed a large washer is offset on the cutterhead bolt, which would make it unbalanced, but I don’t know if it would cause any problems. If Grizzly doesn’t figure it out, I’ll disassemble the entire thing and reassemble to specs to learn more about the machine.

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CaptainKlutz

2062 posts in 2060 days


#5 posted 11-19-2019 10:11 AM

+1 look for a fluttering belt when power is turned off.
Check belt tension (deflection) per manual.

Another remote possibility is worn bearings (check for play with belt off), or the single attachment bolt for the cutter head bearing block is loose. The bearing blocks are shim-able to align the cutter head to table(s). If the hold down bolts are loose, look for displaced shims, and be sure to check the bed to cutter parallelism before use.
YMMV

-- I'm an engineer not a woodworker, but I can randomly find useful tools and furniture inside a pile of lumber!

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Newbie17

29 posts in 1027 days


#6 posted 11-24-2019 01:12 AM

https://youtu.be/K5T58BpUNLk

Seems as though most of the shaking came from the hinge which has a lot of play, even with all bolts and nuts tightened. The pin in the hinge shakes around inside the ‘housing’ due to very loose tolerances. I can shake the motor manually with all fasteners snugged up. I shimmed the hinge with soda can pieces and the shaking is negligible. There is still an uneven sound, but I don’t think it’s anything I can adjust.

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Aj2

2573 posts in 2364 days


#7 posted 11-24-2019 02:36 AM

Good job hunting that one down. I’ve found having a woodshop with all the different machines we have to wear many different hats.
The user the fixer the installer.
Good Luck

-- Aj

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