bonzoronnie
|
| posted on 10/8/11 at 12:33 PM |
|
|
Lathe motor wiring help
Hi all
Any industrial electricians in the house ?
Having decided to move my old Harrison L5 lathe to a more suitable location in my workshop, I have taken the opportunity to give the lathe a full
re-paint & light re-furb ( God knows it needs it )
As part of the re-furb I thought that I would replace the Heath Robbinson 1/4 hp single phase motor that was on the machine when I bought it.
Now it just happens that I have a large good quality 1.5 hp single phase motor going spare, part of my late fathers kit & was a spare for his
milling machine.
A huge bonus is that it is a direct fit to the lathes existing motor mount.
I am no stranger to a little domestic wiring & have wired up the odd motor or Two over the years but I am in the dark on this one, hampered
further by the lack of manfacturers wiring diagram.
Heres what I would like to achieve, Wire up the motor, DOL starter & lathe reverse switch ( Dewhurst type A )
No idea if my goals are even achiveable with this particular motor !!??
Here is a picture of the motors terminal connections
The information on the motors data plate is as follows:
Stayrite single phase ac motor
HP: 1.5
RPM: 1430
Volts: 2**/240 ( * Dink in plate & can't read the numbers )
C/S: 50
Rating: Cont
Amps: 9.5
Class E
Single capacitor motor ( Cap is wired to A2 & Z1 )
Here is what I can make out from the faded diagram on the back of the connector cover.
Single phase capacitor motor
Motor to be operated from a potential relay starter
T1 & T2 are the ****at leads ( * Can't read the letters )
Hopefully the photo shows the terminal markings clearly, if not they are marked T1 & T2, A1 & A2, Z1 & Z2
I was told that a Potential relay starter is also know as a DOL ( Direct online starter )
This was purchaced from an online retailer
Alas, no wiring diagram for this either
No idea where the loose ends of the wires go ??
One is wired to terminal 5 ( L3 ) of the relay & the other is wired to terminal 14 ( NO ) of the relay
No idea where the short link wire wire should go.
Would I be right in assuming that terminals 1( L1 ) & 3(L2 ) of the relay are the incoming mains live & neutral and that terminals 2(T1) &
4(T2) of the thermal overload unit are the outgoing live & neutral to the motor ??
I am sure that it is not going to be so simple that terminals T1 & T2 of the DOL just go the terminals T1 & T2 of the motor, that would be
just too ironic wouldn't it
It goes without saying that I will make sure that all of the earth connections are properly made to provide continuity
Any help would be most appreciated.
Got a sneaky felling that if I have to call a suitably qualified industrial electrcian in to wire it all up it is likely to be more cost effective to
just go out & buy a new Cap start/Cap run motor .
Thanks for taking the time to read this folks
|
|
|
|
|
bonzoronnie
|
| posted on 10/8/11 at 12:53 PM |
|
|
I thought I best post a wiring diagram of my reverse switch 
As said, I would be most obliged for any assistance
|
|
|
Myke 2463
|
| posted on 10/8/11 at 02:07 PM |
|
|
DOL Starter
You have email.
Be Lucky Mike.
|
|
|
907
|
| posted on 10/8/11 at 02:53 PM |
|
|
I'm not an electrician but I did wire a motor to reverse on my rolls.
Search for thread "Large 240v electric motors" by 907.
Cheers,
Paul G
A pic from the thread.
 
motor reverse direction
|
|
|
bonzoronnie
|
| posted on 11/8/11 at 03:41 PM |
|
|
Thanks chaps
Mike
Thank you for that info on the DOL starter, I spent ages searching the internet for such information that I could understand.
Paul
Thank you for the link to that thread.
I must say, you have done a smashing job of that set of slip rolls 
Those safety guards are a work of art.
A stretcher/shrinker is on my to buy list, swiftly followed by an English wheel .... well once I get my workshop a little more organised 
I do have a couple of motor rewinders within a 20 mile radius, I may take the whole shooting match for a ride to see if they will tag all of the
terminals for me.
Don't hold out a lot of hope though, what with all of the health & safety malarkey that exists nowadays 
Once again, thanks for the input chaps
|
|
|
907
|
| posted on 12/8/11 at 06:27 AM |
|
|
Thanks for the complements on the rolls.
I will soon have another project on the go. This time converting 3ph to a 1ph motor.
(I pick up a two post lift on Saturday)
I think another email to electricmotorman will be needed.
The confusing bit for me is the tags they give the contacts in the motors.
Some marked A's, T's & Z's while others marked U's, V's & Z's
Why isn't there a universal marking system? or would that be too easy?
Cheers,
Paul G
|
|
|
rusty nuts
|
| posted on 12/8/11 at 07:12 AM |
|
|
I was lucky when I converted my old to , I worked a couple of doors away from a motor rewinding company . Just took the motor and switch in and they
wired it up for me , best bit they didn't charge me
|
|
|
.jpg)
