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34-466 Unisaw starter question

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Forum topic by CVN72 posted 11-09-2018 04:37 PM 223 views 0 times favorited 9 replies Add to Favorites Watch
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CVN72

11 posts in 187 days


11-09-2018 04:37 PM

Hi,

I just purchased a 34-466 Unisaw and would like to replace the existing starter switch with a magnetic paddle switch.

It looks like the saw originally came with a 2 HP 3 phase motor but was replaced with a 3HP single phase motor and rewired. Can I wire direclty from the motor to the paddle switch and discard the existing srtarter assembly?

How do I upload a picture from my computer to this thread?

I would also like to replace the arbor bearings and belts on the saw. Any suggestions on quality bearing for a good price? I was going to try Accurate Bearings. What specs do I give them?

Thanks.


9 replies so far

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CVN72

11 posts in 187 days


#1 posted 11-09-2018 04:40 PM

OK, I figured out how to upload images.

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Kazooman

1214 posts in 2125 days


#2 posted 11-09-2018 04:42 PM

For the picture. When entering the text of your comment, click on the IMG button above the top left corner of the text field. Click on “choose file”. navigate to the picture file on your computer and then click “insert file”. You can check how it comes out with the preview button before posting.

Edit: I see I was two minutes too slow to help out. Good that you figured it out.

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CVN72

11 posts in 187 days


#3 posted 11-09-2018 04:46 PM

And some pictures of the saw. It’s in pretty good condition considering the age. It just had quite a bit of sawdust in it and some rust.

After brushing off the sawdust and vacuuming.

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TheFridge

10499 posts in 1659 days


#4 posted 11-09-2018 07:02 PM

Don’t replace the starter. Replace the switch. The starter has the overloads for the motor.

-- Shooting down the walls of heartache. Bang bang. I am. The warrior.

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MrUnix

7004 posts in 2372 days


#5 posted 11-09-2018 07:15 PM

That is obviously not the OEM wiring :)

The switch appears to be a maintained contact motor rated (2hp) thing, controlling the low voltage coil wiring for the starter relay. While that will work, it does remove the power-off safety feature of the starter. If it were me, I’d yank that switch and re-do the wiring with a standard control station switch (NO start/NC stop).

Is there a wiring diagram on the inside of the starter cover? If so, it should show you how it was originally wired. Post a picture or two so the rest of us can see it as well.

Cheers,
Brad

-- Brad in FL - In Dog I trust... everything else is questionable

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CVN72

11 posts in 187 days


#6 posted 11-10-2018 02:44 PM

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CVN72

11 posts in 187 days


#7 posted 11-10-2018 02:50 PM

It looks like the box is to prevent a current overload. Is this necessary?

I want to do away with the overload protection box and replace it with a magnetic paddle switch that fits in a standard sized outlet box.

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shampeon

1858 posts in 2356 days


#8 posted 11-10-2018 05:24 PM

Read this, because you don’t seem to grasp how the starter and switches work in these machines.
http://wiki.vintagemachinery.org/Motor%20Starter%20Wiring%20Diagrams.ashx

For large motors, a starter is 100% necessary. Your panel breaker box is to prevent the wires in the walls from starting a fire, not to protect your motor.

You can use a paddle switch with your starter. It will be a low voltage momentary switch that connects to the magnetic starter. You can relocate the starter box to somewhere more out of the way, and add the paddle switch wherever you want.

-- ian | "You can't stop what's coming. It ain't all waiting on you. That's vanity."

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CVN72

11 posts in 187 days


#9 posted 11-11-2018 06:30 PM

OK, thanks for the information.

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