New Jointer and Table Saw- Both Start Rough...??!?!

[Matt Sollars]

Just got my table saw (1023sl) and jointer (G0593) wired up to 220v today.

When starting the jointer, i get a loud bang, then very smooth running. almost like a jerk/knock sound....then it runs great.

When i start the saw, i get a similar, but not as bad knock sound....but then i have some vibration while running....enough to rattle the handle of a screwdriver off the left wing.

Both are on 'temporary' bases...though i only think that would justify the vib. of the saw...not the initial knock on startup.

any ideas?

matt

[Jason White]

Welcome to 220 volts!

Feel the power!!

Originally Posted by Matt Sollars

Just got my table saw (1023sl) and jointer (G0593) wired up to 220v today.

When starting the jointer, i get a loud bang, then very smooth running. almost like a jerk/knock sound....then it runs great.

When i start the saw, i get a similar, but not as bad knock sound....but then i have some vibration while running....enough to rattle the handle of a screwdriver off the left wing.

Both are on 'temporary' bases...though i only think that would justify the vib. of the saw...not the initial knock on startup.

any ideas?

matt

[Gerry Grzadzinski]

Originally Posted by Matt Sollars

When starting the jointer, i get a loud bang, then very smooth running. almost like a jerk/knock sound....then it runs great.
....................
any ideas?

matt

Make sure the belts are tight.

[Richard Wolf]

Sounds like your belts may be loose. Check them first.

Richard

[glenn bradley]

Originally Posted by Jason White

Welcome to 220 volts!

Feel the power!!

All joking aside; watts is watts and your voltage does not effect your motor performance. The bang you describe on the jointer is probably belt slap. I don't know that this is a big problem on multi-belt machines. Can't speak to the tablesaw but, causes for that bang on my single belt 3HP machine were:

1 - Raw power distorting the belt on startup no matter how tight I got it. I cured this with a link belt. BTW, now is a good time to mention that too much tension is not great for your bearings, so don't over do it.
2 - The belt guard where the belt exits the lower cabinet had inadequate clearance to avoid being struck on startup and wind down. I cured this by elevating the guard to provide more clearance. You can see it at the tippy top of this pic. I just used a couple nets and washers to get it higher up.

[Brian Hughner]

Along the same lines, I have a Grizzly 593 jointer but I get the bang after I turn the jointer off and it is slowing down. Right before it stops, bang! Could this also be caused by a loose belt?

[Bruce Page]

Ditto checking the belts first.
Loose belts are the most common reason for the loud bang/knock you describe.

Congrats on the new machines!

[M Toupin]

As others have said, check the belts. Also, a loose pulley will cause the same symptoms. check that the set screws are tight on both pulleys.

Mike

[John Harden]

Motor design is also a big factor, if not the primary one. About 8-10 years ago there was a lot of fuss when Delta changed the motors on their 220V Unisaw's. They began exhibiting a terrible bang on start up, which wasn't just belt slap, though that was also a factor.

A link belt may help or even eliminate the sound due to its ability to absorb vibration. My PM, 15S planer did the same thing with it's cheap, Chinese/Taiwanese motor. A link belt got rid of most of the bang, but not all.

My PM-66 with Baldor motor started up smooth as silk for 13 years before I sold it. It still had the original, old fashioned belts on it that were there the day I bought it. Leeson's also do not exhibit this behavior.

Perhaps this is why these two brands are some of the most popular replacement motors when it comes time.

EDIT: Regarding the vibraton, I agree with the advice to check the pulley's. My 66 would do this every once in awhile when one of the set screws on a pulley had worked loose. I'd have to reset the pulley position and tighten both set screws. This is the most likely cause.

Regards,

John

[John Coloccia]

Originally Posted by Brian Hughner

Along the same lines, I have a Grizzly 593 jointer but I get the bang after I turn the jointer off and it is slowing down. Right before it stops, bang! Could this also be caused by a loose belt?

Sure it's not just a loud click? You might be hearing the starter caps re-engaging. Your drill press motor probably makes the same sound though most people assume it's the belts. I say that only because visitors to my shop always ask, "Gee, is that just the belts 'releasing'? ", to which I answer, "I sure hope not!".

[Frederick Rowe]

My 4 year old Unisaw started with a bang when new. Belts were fine, switched to a link belt and the bang was gone. I believe the link belts eliminated the bang by stretching more than factory belts, thereby attenuating the motor start up.

[Cliff Holmes]

Definitely check the setscrews on the jointer's motor pulley. Note the plural, there are two of them on that one pulley. Mine had the same symptoms and tightening the setscrews took care of it.

[Brian Hughner]

Well, its pretty loud. Loud enough for me to hear through my ear protection. And it seems to have a pretty good shake to it as well. It happens just as the motor is coming to a stop.

[Pete Bradley]

New machines == new belts. I'd run them for a while to break them in before doing much.

On the machine that bangs on start, see if there's a spring, loose bolts, or something else that's supposed to be holding down the motor mount better than it is. I bet if you watch the motor on startup you'll see it jump a couple inches.

[Rod Sheridan]

Belts vary in quality, you get what you pay for.

As others indicated check the pulleys for loose set screws, keys etc.

If that doesn't cure the problem purchase a good quality industrial belt from a power transmission supplier.

Regards, Rod.