Table Saw Upgrade #6: VFD Soft Start in Action

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Blog entry by MikeGCNY posted 03-07-2011 06:37 AM 5360 reads 1 time favorited 4 comments Add to Favorites Watch
« Part 5: Putting it Back Together Part 6 of Table Saw Upgrade series Part 7: Alignment and New Blade »

I finished wiring the Variable Frequency Drive this weekend. I made a video of the VFD in action.


Here is the VFD and Disconnect

The Saw
Here is a picture of the saw with the re-surfaced Beisemeyer Fence. I used a sheet of 3/16 UHMW Polyethylene laminate.

I cannot believe the cost of the wiring. For this and my band saw I spent close to 400 dollars on wire and breakers.

4 comments so far

View tsangell's profile


211 posts in 1388 days

#1 posted 03-07-2011 07:52 AM

Mike, that saw is a beast!

View ken_c's profile


263 posts in 1857 days

#2 posted 03-07-2011 02:20 PM

will that saw motor stand up the the VFD? Are you just using for a soft start/ soft stop application but running at full speed? I hope so because the motor in your saw is fan cooled. The fan will not be able to properly cool the motor if you are running at reduced speeds. They make special motors for VFD use and not all motors are designed to operate, very long, at reduced speeds and reduced frequencies.

View MikeGCNY's profile


43 posts in 2190 days

#3 posted 03-07-2011 03:13 PM

Ken, it runs at reduced speed for about 3 seconds, then it comes up to the full 60 Hz. In the video you can see the control panel displaying the frequency. I ran it for a few hours yesterday through a few dozen start and stoa and there was almost no heat at the VFD or the motor.

View kshipp's profile


179 posts in 2473 days

#4 posted 03-08-2011 06:01 AM

I really like that 3 second brake. I just got a VFD to put on my dust collector but only really for phase conversion. I can really see the benefit to one on a table saw now.

-- Kyle Shipp,

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