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Delta electric motor not running up to speed

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Forum topic by DouginVa posted 592 days ago 1153 views 0 times favorited 22 replies Add to Favorites Watch
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DouginVa

486 posts in 897 days


592 days ago

Topic tags/keywords: jointer question

I just bought a Delta 37-190 6” jointer off of Craigslist. The previous owner didn’t use it much at all and it had been in storage for a very long time when he decided to sell it. There is a lot of surface rust, etc., but nothing a little elbow grease won’t take care of. The problem is with the motor. While it does turn on it runs very slow and eventually trips the circuit and shuts down.

I’m not an electrician and have very little knowledge and/or experience in trouble shooting electric motors. So…..anybody with experience out there that may be able to identify my problem here and ideas on how to fix it?

-- Just a man with his chisel.........


22 replies so far

View BurtC's profile

BurtC

89 posts in 1754 days


#1 posted 592 days ago

Sounds like the centrifugal switch is not working right. It is a switch that allows current to the starting windings until up to speed, then only the running windings are active. I think in you case the switch is stuck open. Suggest opening motor and cleaning the switch mechanics and the contacts. Hopefully the windings aren’t burnt. Do you smell a kinda smoke/toxic near motor?

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DouginVa

486 posts in 897 days


#2 posted 592 days ago

No burning odors or unusual noises coming from the motor. The motor hasn’t run long enough yet to overheat anything.

-- Just a man with his chisel.........

View bbc557ci's profile

bbc557ci

541 posts in 699 days


#3 posted 592 days ago

I had a similar problem with an older Atlas TS I was bringing back up to snuff. A very informative and helpful gent from another site tried to walk me through the process to figure out the problem. But I too am electrically challanged. So, after pricing new 1 hp motors and realizing how much a good / new motor costs, I put a “I’m looking for” add up on Craigslist, and was fortunate enough to get a 1 hp motor for $40.00. Looked almost new and the old Atlas is ripping wood once again :o)

-- Bill, central NY...no where near the "big apple"

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Grandpa

3071 posts in 1300 days


#4 posted 592 days ago

This centrifical swith Burt is referring to is often just inside the motor cap opposite the shaft end of the motor. Unplug the motor, take the bolts out and see if you can gently get the end off. There should be some weights and contacts there. If the motor is not totally enclosed it might have wood chips or sawdust in a contact. Clean everything out and reassemble. Sometimes the grease hardens in the bearings. Try turning the bearings while you are there. I have had motors sit for years and not just jump into action when I turned them on. If I can get them started I let them run for awhile. 30 minutes or so. This helps soften things up.

I don’t think that will be a 220V motor but you might look at it and see what the data plate says. Never know what some other guy might have done. Checking the end on the cord won’t help because you don’t what some other guy might have done.

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DouginVa

486 posts in 897 days


#5 posted 592 days ago

I just got the machine from my car and in to my shop. And…..the motor purrs like a kitten. The guy selling it must not have a good flow of electricity to the outlet he used or something…...oh well, his loss my gain. I’ve got an upgraded jointer now for only $50 and some elbow grease work ahead of me.

I’ll have to create a blog on the restoration/refurbishing of this when I get started.

Thanks for the responses guys!

-- Just a man with his chisel.........

View Dusty56's profile

Dusty56

11643 posts in 2312 days


#6 posted 592 days ago

Does it spin easily by hand ?
I’ve had them chuck full of sawdust as well as the grease turned to stone from sitting around for years.
If the motor does turn easily , then I would trouble shoot the electrical side of it as suggested above : )

-- I'm absolutely positive that I couldn't be more uncertain!

View Grandpa's profile

Grandpa

3071 posts in 1300 days


#7 posted 592 days ago

moving it might have dislodged some dust or other debris inside the motor. Check it out like Dusty suggested. Congratulations!!

View TopamaxSurvivor's profile

TopamaxSurvivor

14721 posts in 2300 days


#8 posted 592 days ago

Moving it probably fixed the stuck switch. Whack the end of the motor with a mallet if it happens again.

-- "some old things are lovely, warm still with life ... of the forgotten men who made them." - D.H. Lawrence

View Tennessee's profile

Tennessee

1447 posts in 1139 days


#9 posted 592 days ago

I’d guess that in the trip, you might have broken loose some debris that was keeping the switch from operating correctly. Burt is right, the start switch was staying open. If it was a capacitor, it would not have turned at all.
You broke loose the switch on the trip.

-- Paul, Tennessee, http://www.tsunamiguitars.com

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DouginVa

486 posts in 897 days


#10 posted 592 days ago

@ Dusty; yes it did move freely by hand which is why I suspected electrical/motor problems. I’ll be sure to open the motor case up and at a minimum blow some air through there and look for issues.

I’m still grinnin’ as I got a steal on this baby.

-- Just a man with his chisel.........

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Dusty56

11643 posts in 2312 days


#11 posted 592 days ago

What kind of a steal ? Did they pay you to take it ? LOL

-- I'm absolutely positive that I couldn't be more uncertain!

View DIYaholic's profile (online now)

DIYaholic

13251 posts in 1299 days


#12 posted 592 days ago

Congrats on the score and motor problem resolution.

You know what they say about pictures….....

-- Randy-- I may not be good...but I am slow! If good things come to those who wait.... Why is procratination a bad thing?

View DouginVa's profile

DouginVa

486 posts in 897 days


#13 posted 592 days ago

He was asking $100, I got it for $50. I suspect he was someone who wanted to get in to woodworking, bought a few tools, then lost interest. The knives didn’t even look like they have dulled at all. But at the same time he didn’t protect it from moisture while it was in storage.

-- Just a man with his chisel.........

View Dusty56's profile

Dusty56

11643 posts in 2312 days


#14 posted 591 days ago

Ya done good , Doug : ) Rust is an easy fix and a great way to talk down the seller !

-- I'm absolutely positive that I couldn't be more uncertain!

View toolie's profile

toolie

1737 posts in 1253 days


#15 posted 591 days ago

congrats on a gloatable buy. $50 for a 6” jointer is a gloatable deal in my neck of the woods. but no pics, didn’t happen. so where’s a pic or two of this really good deal?

-- there's a solution to every problem.......you just have to be willing to find it.

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