I have a wild kind of question.
I have an old Delta Uni-saw. it was given to me by by a customer. This year I took it out of a place I was storing it at and did a cleanup on it. It runs, but kinda funny. It’s a ’48 so I expect a little differance. Only a 1700 rpm motor. Anyways,on the motor is 4 wires,(110-220 hook-ups?). Any one know the correct wiring hook-up for 110 ? If you do I would appreciate it greatly. I have already cleaned the motor and it looks in good shape inside,but when it runs it alters speed and it seems like sometimes drops power when being used. Thanks
Replies
Old woodworking machines . org is a great source of info
http://www.owwm.org/
Thanks alot for your responses folks, I really appreciate it !
I went through a search to get diagram on my china made dust collector, the cust rep at the company that sold it to BIL went to great lengths to get me a pdf of the manual from their vendor. Got ready to rewire from 120 to 240 and there it was on the motor. Look for a cover near the wires and it may be inside. Even if it is that old it might have something.
If the motor is acting up it might be a great time to take it off and go to a motor shop, sure they can sort out the possibilites for you. I have a Ridgid saw and converted it and DC to 240. Well worth the effort. Both spin up much quicker.
Edited 2/23/2009 10:38 pm ET by rasconc
The motor data plate should have the wiring details.
old woodworking machines website will probably have the manual if the motor is stock.
Also, try posting over on Knots, the FineWoodworking forum. There is a link at the top of the page.
I just wanted to second what rasconc said. Take it to a electric motor shop.
The way it is losing power is wrong. That is a good saw.
If it's the original bullet motor, it will be a Repulsion start - Induction run (R/I) motor. There are 4 wires, red, yellow, green, black. Red and yellow are often difficult to distinguish as they age to a similar color, but the "redder" of the two is the red one.
For 110, you hook red and green to one line and yellow and black to the other.
For 220, you hook black to one line, green to the other, and connect red and yellow to each other.
Don't forget to add a ground wire solidly connected to the motor and/or machine.
The most common cause of poor power is running it on 110 when it's wired for 220. Also check that the arbor and motor turn freely when powered off. I'd also question the connections in the starter or switch. Be careful as the insulation on the old wires gets very crispy. You should replace any old cords with new.
Pete
Edited 2/24/2009 12:56 pm ET by PeteBradley
Mine's a '42 and it is very unhappy at 110V, but that's all I have in
my cr$ppy garage now.
A '42 Uni should run fine on 110 if properly wired. The motors were designed for a time when electrical service couldn't be counted on to deliver the kind of starting amps that a modern motor needs. If it starts but lacks power, see my previous note, or perhaps you're running it on a long/thin extension. If it has trouble starting, there are some issues specific to R/I motors that may be the problemPete
I just sold my old Unisaw this past week and the wiring is on the motor data plate. Brushes also would be a good thing to check, when mine had quit a couple years ago one brush was gone and there was just enough of the other one to go digging at an Old motor shop and we found a couple that would work.
koi