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Forum topic by Finley31 posted 12-21-2017 12:52 PM 530 views 1 time favorited 27 replies Add to Favorites Watch
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Finley31

9 posts in 59 days


12-21-2017 12:52 PM

When I purchased my table saw it was wired in the 120v configuration. I attempted to switch it over o 240v this evening, using the diagram glued to the back of the starter panel. Apparently I swapped the connections on the coil in the wrong configuration because when I hit the start button all I got was a pop from the starter and my breaker kicked in my electrical panel in the garage. Knowing that I made a mistake I switched the wires back to the original 120v configuration and tried to start the saw, but now the contractor will not pull in. When I manually close the contractor the saw runs fine but the contractor just will not pull in. The reset switch isn’t tripped so I’m really at a loss for how how to approach it from here. Any input would be appreciated.


27 replies so far

View TheFridge's profile

TheFridge

8838 posts in 1388 days


#1 posted 12-21-2017 01:17 PM

Mightve blown the coil on the starter. A close up pic would help.

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

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Tennessee

2738 posts in 2416 days


#2 posted 12-21-2017 01:24 PM

I’d say you fried the starter coil. That would be the coil of wire that sets up a magnetic field around the contacts and pulls in the iron mount in the middle of the contacts.

You might be lucky and just fried the overload.

-- Tsunami Guitars and Custom Woodworking, Cleveland, TN

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Finley31

9 posts in 59 days


#3 posted 12-21-2017 02:11 PM

Thanks for the quick responses. I found some replacement coils on eBay. I think I might try to get one and see if that fixes the problem.

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TheFridge

8838 posts in 1388 days


#4 posted 12-21-2017 02:17 PM

It’s fairly easy to check. Check continuity on the coil. As a general rule, If it has continuity it’s good. If it doesn’t it’s bad. Just make sure you disconnect either one of the leads to the coil when you do it.

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

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Finley31

9 posts in 59 days


#5 posted 12-23-2017 02:29 PM



It’s fairly easy to check. Check continuity on the coil. As a general rule, If it has continuity it’s good. If it doesn’t it’s bad. Just make sure you disconnect either one of the leads to the coil when you do it.

- TheFridge

I checked the continuity on the coil this morning and it appears to be good. I already ordered a replacement coil. Could it be possible there is something else that would keep it from pulling in?

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CharlesNeil

2210 posts in 3772 days


#6 posted 12-23-2017 02:40 PM

Try lightly filing or sanding the contacts.. had a PM and had to to do that on occasion… of course disconnect the power

View MrUnix's profile (online now)

MrUnix

6325 posts in 2101 days


#7 posted 12-23-2017 04:22 PM

Post a closeup of your starter so we can see what you got. Sounds like you toasted the low voltage control transformer.

Cheers,
Brad

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

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Finley31

9 posts in 59 days


#8 posted 12-23-2017 06:25 PM

Close ups of the starter. By the way I appreciate all the helpful responses.

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MrUnix

6325 posts in 2101 days


#9 posted 12-23-2017 06:32 PM

Still can’t really tell, but across the top there are some jumpers to set the control transformer supply voltage… did you change that when you switched to 240v? If you didn’t, then you most likely fried the transformer running it on 240v when it was still wired for 120v. Should be easy check though, just plug it in and see what voltage is coming out of the transformer with a meter. The voltage should be marked on the transformer label (circled).

Cheers,
Brad

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

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Finley31

9 posts in 59 days


#10 posted 12-30-2017 02:10 AM

I received my new coil and installed it this evening with no luck. I got my meter out and started tracing the power. I found I have 120v coming in on the white wire in the photo below. From there it goes into the overload relay on the bottom but stops there. The relay is not tripped so is it possible that it’s the problem? At this point I’m considering buying a new starter. Could I just get one of the grizzly starters and swap it out?

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MrUnix

6325 posts in 2101 days


#11 posted 12-30-2017 04:28 AM

Just to make sure – did you push in the manual reset (red button at bottom) to make sure it wasn’t tripped? Also, is there a control voltage transformer (not the coil)? Symptoms sounds like you lost control voltage, since it will work when manually engaged.

Cheers,
Brad

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

View Alex Lane's profile

Alex Lane

457 posts in 3792 days


#12 posted 12-30-2017 03:55 PM



Just to make sure – did you push in the manual reset (red button at bottom) to make sure it wasn t tripped? Also, is there a control voltage transformer (not the coil)? Symptoms sounds like you lost control voltage, since it will work when manually engaged.

Cheers,
Brad

- MrUnix

I think Brad has a good suggestion. I feel your pain! Had an old 3 phase bandsaw with the same problem on a similar control. I could manually push up the contactor to make it start. I never actually addressed the issue though, since I was converting to single phase. I merely bought a single phase motor and new switch, and put the old motor and control in a box on the shelf. Probably needs the control transformer replaced but I was sick of messing with it. Laziness prevailed lol. Since yours is already single phase it’s probably worth the effort to get the control fixed or replaced. That’s a really nice saw!

-- Lane Custom Guitars and Basses

View Fresch's profile

Fresch

121 posts in 1822 days


#13 posted 12-30-2017 06:07 PM

How about a pic. of the wiring diagram on the cover.
That starter is $250

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Finley31

9 posts in 59 days


#14 posted 01-01-2018 01:52 AM



How about a pic. of the wiring diagram on the cover.
That starter is $250

- Fresch

Thanks for all the responses. After much frustration I ordered a new starter from amazon. Definitely not the quality I had, and I’m not giving up on my old one but I need to get the saw back up and running.

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MrUnix

6325 posts in 2101 days


#15 posted 01-01-2018 02:21 AM

You really got to learn how to take better pictures ;)

Cheers,
Brad

PS: Here is a used one for $20

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

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