Delta Unisaw - Woodworking Talk - Woodworkers Forum
Thread Tools Display Modes
post #1 of 5 Old 01-03-2009, 07:41 PM Thread Starter
Join Date: Jan 2009
Posts: 1
View woods of williams's Photo Album My Photos
Delta Unisaw

I just got a Delta Unisaw that was built in the 50's. Wired for 440 and 3 phase. So that I can use it in my home shop I changed the wiring so that the motor could run at 220 and added a phase converter to go from 3 phase to single phase. It works ok but, bogs down when ripping anything thicker then 2 inches. If there is anyone out there with any tips that can help get this jem to run at maxium power. Pleae help !!!!

Woods of Williams
woods of williams is offline  
Sponsored Links
post #2 of 5 Old 01-03-2009, 09:00 PM
Join Date: Dec 2008
Posts: 33
View Kudzupatch's Photo Album My Photos
Assuming your using a static phase converter you lost 1/3 of your horsepower. There is three legs/wires on 3 phase. The statics only provide 2 legs of power. I am not sure of the details but I think it provides 3 legs to get it to start? But if that is what you have odds are there is nothing you can do. Assuming everything is working correctly.

The best way to go is with a rotary converter. It actually provides all 3 legs and with a properly sized converter there is no power loss. And the best part is that you can run other 3 phase machines which are typically cheaper than single phase machines. Used machines that is.

Other option is replacing the motor with a single phase motor. But that is almost the same price as you can build a RPC for.

Last edited by Kudzupatch; 01-04-2009 at 08:54 AM.
Kudzupatch is offline  
post #3 of 5 Old 01-03-2009, 10:49 PM
Senior Member KE4TQP
John in Tennessee's Avatar
Join Date: Jun 2008
Location: Nashville
Posts: 570
View John in Tennessee's Photo Album My Photos
Couldn't you just replace the motor with one wired for 220?
John in Tennessee is offline  
Sponsored Links
post #4 of 5 Old 01-04-2009, 07:34 AM
Senior Member
Join Date: Sep 2007
Location: West Chester Pa.
Posts: 569
View bigredc's Photo Album My Photos
Unless you plan on getting more 3 phase equipment the easiest thing to do is change the motor. There are used ones for sale pretty regular. There are some very cool old machines that have the motors built in that are 3 phase and you can't change the motor. If you ever thought you might be getting something like that then the RPC would be nice to have. If not it's just one more thing to have to maintain. There is a web site exclusively devoted to Old Wood Working Machines. It's called OWWM. They can be a big help with these kind of questions. You can get directions on how to build an RPC there if your into that. There is also a classified section that you might find the motor at.
bigredc is offline  
post #5 of 5 Old 01-04-2009, 09:28 AM
Papa Red
red's Avatar
Join Date: Sep 2008
Location: Denver NC
Posts: 1,165
View red's Photo Album My Photos
Good luck with the saw and welcome to the forum. Red

red is offline  

Quick Reply

Register Now

In order to be able to post messages on the Woodworking Talk - Woodworkers Forum forums, you must first register.
Please enter your desired user name, your email address and other required details in the form below.

User Name:
Please enter a password for your user account. Note that passwords are case-sensitive.


Confirm Password:
Email Address
Please enter a valid email address for yourself.

Email Address:


Thread Tools
Show Printable Version Show Printable Version
Email this Page Email this Page
Display Modes
Linear Mode Linear Mode

Similar Threads
Thread Thread Starter Forum Replies Last Post
Delta Unisaw Blade Arbor Nut landyl Power Tools & Machinery 21 03-02-2013 09:05 AM
Unisaw motor sjmartin7441 Power Tools & Machinery 3 06-25-2008 02:05 PM
Delta Unisaw needs repair - $250 (Julian, NC) djonesax Power Tools & Machinery 4 05-07-2008 03:33 PM
Delta woodman42 Power Tools & Machinery 10 12-26-2007 04:28 PM
Delta 36-600 mikew13 Power Tools & Machinery 6 11-27-2007 08:14 PM

Posting Rules  
You may post new threads
You may post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off

For the best viewing experience please update your browser to Google Chrome