Reversing switch wiring how to question.

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OLDBEAR
Posts: 45
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Location: DFW, Texas

Reversing switch wiring how to question.

Post by OLDBEAR » Thu Feb 02, 2012 10:48 am

Greetings, OLDBEAR here. I have purchased an Atlas 618 and am attempting to assemble this unit. The lathe package I purchased came with a motor, some tooling and no stand, so I have built a stand and am ready to bolt things together. The motor that came with the lathe is a Sears Craftsman "60", model number 115.19661. I have a reversing switch (bought seperately) and would like to know if this motor is capable of being wired to this switch. The switch is a Furnas Electric style A-14.
I should have researched this before I got to this point (having built the stand and motor mount to accept this motor). I am now reading after googling some, that is not the best choice for motors to be used on machinery, anyway here I am, Don't scold me to bad. I will gladly accept any and all recomendations. Thanks.
Last edited by OLDBEAR on Thu Feb 02, 2012 3:06 pm, edited 2 times in total.
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wlw-19958
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Re: Reversing switch wiring how to question.

Post by wlw-19958 » Thu Feb 02, 2012 12:13 pm

Hi There,

I'm pretty sure it probably can be connected to your drum switch.
I don't have a diagram for you switch and a quick Google search
didn't turn one up for me. I take it your motor is a 1/3 HP split
phase motor.

I will need a picture of the wiring diagrams from the switch (usually
under the cover) and the motor and/or a list of the motor leads or
a picture of the terminal board and the instruction for reversing listed
on the motor's ID plate.

Good Luck!
-Blue Chips-
Webb

OLDBEAR
Posts: 45
Joined: Mon Feb 01, 2010 7:26 am
Location: DFW, Texas

Re: Reversing switch wiring how to question.

Post by OLDBEAR » Thu Feb 02, 2012 12:17 pm

Photos of the lathe bench and motor mount.
Attachments
MY LATHE 2.jpg
MY LATHE 5.jpg
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OLDBEAR
Posts: 45
Joined: Mon Feb 01, 2010 7:26 am
Location: DFW, Texas

Re: Reversing switch wiring how to question.

Post by OLDBEAR » Thu Feb 02, 2012 12:26 pm

The motor is badged Sears Craftsman. 1/3 horse power. Split phase. There are no wiring diagrams on the motor and none to be found on google, as of yet anyway.
Attachments
MY LATHE MOTOR 1.jpg
MY LATHE 6.jpg
MY LATHE MOTOR.jpg
Last edited by OLDBEAR on Thu Feb 02, 2012 3:03 pm, edited 1 time in total.
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wlw-19958
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Re: Reversing switch wiring how to question.

Post by wlw-19958 » Thu Feb 02, 2012 1:05 pm

Hi There,

Well that 'bench' is plenty beefy for your lathe!

The picture for the motor tag is a bit blurry but I think
I see 'for reversing, interchange yellow leads on terminal
board' or something to this effect (have a couple Sears
Craftsman motors on hand). Those two leads will have
to be disconnected from the terminal board and connected
to the drum switch, along with the L1 and L2 power leads.

I still need the diagram from the drum switch to give a
comprehensive wiring diagram for your application.

Good Luck!
-Blue Chips-
Webb

OLDBEAR
Posts: 45
Joined: Mon Feb 01, 2010 7:26 am
Location: DFW, Texas

Re: Reversing switch wiring how to question.

Post by OLDBEAR » Thu Feb 02, 2012 1:25 pm

I do not see a wiring diagram on or in the switch yet and nothing at google. :? The switch is a Furnas Electric style A-14. Thanks for your help, sorry for the blurry picture it does say "for reversing interchange the two yellow leads in the terminal box".
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MY LATHE MOTOR 3.jpg
MY LATHE MOTOR SWITCH.jpg
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wlw-19958
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Re: Reversing switch wiring how to question.

Post by wlw-19958 » Thu Feb 02, 2012 3:59 pm

Hi There,

I have a diagram for your rotary drum switch.

This should be for your Furnas A-14:

Image

You may want to check your switch for yourself
to make sure your switch is working correctly.

I'll make you a wiring diagram in a little bit but your
motor will work using the diagram listed under split
phase
(the start winding are the yellow leads).

Good Luck!
-Blue Chips-
Webb

OLDBEAR
Posts: 45
Joined: Mon Feb 01, 2010 7:26 am
Location: DFW, Texas

Re: Reversing switch wiring how to question.

Post by OLDBEAR » Thu Feb 02, 2012 4:12 pm

Greetings Webb, thanks. It is very much appreciated.
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wlw-19958
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Re: Reversing switch wiring how to question.

Post by wlw-19958 » Thu Feb 02, 2012 5:21 pm

Hi There,

The following diagram should work for you. I checked a Craftsman motor
I have that is of similar age and type but isn't identical. Therefore you
should check your motor to see if it is suitable to your application.

Image

Please Note: This diagram is based on the centrifugal starting switch
being connected directly to the yellow wires. If the motor makes
any funny noises or excessive vibrations or burning smells, STOP!


All that being said, I'm pretty sure this will work just fine.

Good Luck!
-Blue Chips-
Webb

OLDBEAR
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Location: DFW, Texas

Re: Reversing switch wiring how to question.

Post by OLDBEAR » Thu Feb 02, 2012 5:42 pm

Well you don't know how much I appreciate the information. I bought this lathe a long time ago and have never ran it. I am unemployed at the moment (broke) and have the time to work on it. I should have done this research before I built this stand. I would have purchased a single phase motor probably. Webb are these split phase motors intended to be used with a reostat? When you start a split phase motor it draws a large ammount of amperage. Am I correct? I will use this motor as long as it lasts. Thanks. Bill.
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wlw-19958
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Re: Reversing switch wiring how to question.

Post by wlw-19958 » Thu Feb 02, 2012 6:22 pm

Hi There,
OLDBEAR wrote:Webb are these split phase motors intended to be used with a reostat? When you start a split phase motor it draws a large ammount of amperage. Am I correct? I will use this motor as long as it lasts. Thanks. Bill.
Split Phase motors are not intended to run on a rheostat.

The amount of amperage draw for most AC motors is always
greater when starting. It can be anywhere from three to
five times the running amperage of the motor. A capacitor
start motor is just a split phase motor with a capacitor added
to the starting circuit to throw the phase of the starting windings
off a little to increase the starting torque of the motor.

This increase in current draw is dependent on the 'load' the
motor has to start moving. The more mass it has to start
moving, the more current draw it will have. Of course, the
rotor inside has to start turning so, there will always be some
'load.' It just depends on how much more 'load' (mass) it has
to start.

But this increase draw is for a fraction of a second. If you are
worried about your breakers, they are usually designed to have
a slight delay before 'kicking-out' to let this momentary increased
in draw to pass. There are 'slow-blow' fuses too, just for this
situation.

If you are thinking of a 'soft-start' option for your motor, don't
use a rheostat! They just control voltage. Split phase motor's
speed is determined by the number of poles inside the motor and
the frequency of the AC power (60Hz in the USA) If you want to
control speed, you would have to change the frequency of the
AC power going to the motor. This isn't very popular with single
phase but is very popular with 3-phase power. If you want variable
speed motor, check out a 3-phase motor in combination with a
Variable Frequency Drive (or VFD for short) Used 3-phase motors
can be found quite cheap and VFD's are getting cheaper all the time
(they can be found for around $100 or less for fractional HP motors).
Yes, I know you are counting pennies right now but you can file it
away for future reference.

Good Luck!
-Blue Chips-
Webb

OLDBEAR
Posts: 45
Joined: Mon Feb 01, 2010 7:26 am
Location: DFW, Texas

Re: Reversing switch wiring how to question.

Post by OLDBEAR » Thu Feb 02, 2012 7:31 pm

Greetings, oh I will absolutely record this information for the future, this maybe my first upgrade. :D Thanks again.
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