Sawstop Problem

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Forum topic by nicencutt posted 04-16-2017 06:46 PM 1917 views 0 times favorited 7 replies Add to Favorites Watch
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8 posts in 1853 days

04-16-2017 06:46 PM

Topic tags/keywords: sawstop stawstop problem sawstop belt

I have a 3 year old contractors Sawstop that has given me no problems until recently. The start capacitor had to be replaced—no big deal. Then it started to make a “grunting” noise when I turned off when it was almost done spinning. It would throw the belt at that point almost every time? Their service department thought it was probably the centrifugal switch?? They sent me a new switch and I ordered a new belt at the same time. I took the motor and new switch to an electric motor shop. They replaced it but said there was absolutely nothing wrong with the old one. Re-installed motor and it was still throwing the belt on shut-down. I put the new belt on it and thought that had solved the problem. But about a week later it started doing the exact same thing again. It’s Easter Sunday so I can’t call them until tomorrow but does anyone have any suggestions? The pulleys appear to be in alignment. Not sure what else to check. The motor shop said a lot of motors on table saws will have a magnetic brake which is an internal part of the motor and they will make a grunting noise, but should not be throwing the belt.

-- Experience is a wonderful thing. It enables you to recognize a mistake when you make it again.

7 replies so far

View JayCee123's profile


200 posts in 1366 days

#1 posted 04-16-2017 07:01 PM

I don’t have a Saw Stop, just some experience with stationary sander issues ….
Have you checked the belt tension?
How did you check pulley alignment with a straight edge across the pulleys?
Are the motor mount bolts tightened to spec?
The pulley on the arbor and on the motor shaft … are they secure?

View pintodeluxe's profile


6032 posts in 3415 days

#2 posted 04-16-2017 08:24 PM

1+ with previous comment, I would be taking a detailed look at the pulley alignment and belt tension. Not sure about sawstop specific issues, my PCS has never thrown a belt.

Let us know what they say after the holiday.

-- Willie, Washington "If You Choose Not To Decide, You Still Have Made a Choice" - Rush

View nicencutt's profile


8 posts in 1853 days

#3 posted 04-17-2017 01:59 AM

I have checked all. Pulley alignment is perfect. Tension comtrolled by weight of motor and a spring.

-- Experience is a wonderful thing. It enables you to recognize a mistake when you make it again.

View patcollins's profile


1687 posts in 3467 days

#4 posted 04-17-2017 02:01 AM

Bad bearing maybe, either on the arbor or in the motor.

View MerylL's profile


73 posts in 1972 days

#5 posted 04-17-2017 03:18 AM


View yvrdennis's profile


50 posts in 1679 days

#6 posted 04-17-2017 02:26 PM

Try taking the belt off and turning the motor and arbor by hand. They should turn smoothly. Also, jiggle both shafts side to side and in and out to check for play. If there is a bad bearing you should be able to feel it.

View BikerDad's profile


347 posts in 4203 days

#7 posted 04-17-2017 08:11 PM

Tension controlled by weight of motor and spring.

Check to make sure that the spring is seating properly and is under tension at the bottom, and that the motor and mounting and all that is tight. What it sounds like is happening is the blade and motor are slowing down at different rates. This is resulting in the motor climbing and “unloading”, leaving no tension on the belt, which allows the belt to escape. The grunting is likely the motor bouncing as it slows down. Something else that might cause this is some substance on the pulleys at ONE end, which causes the belt to either hook up or slip on that end, again, resulting in the motor unloading. Last possibility is the safety cartridge and blade are not in alignment with one another, which may be causing a bit of rubbing on the blade, resulting in different rates of slowing..

-- I'm happier than a tornado in a trailer park! Grace & Peace.

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