Motor Start Circuits

[everettdavis]

There have definitely been a thousand words or more trying to explain the various motor manufacturers and start circuits different Shopsmith models through the years.

Here is a graphic that may help visualize them in a manner that is helpful for most who have a basic understanding, and need just a bit more to visualize it.

Everett

Circuit to Motor.png (54.26 KiB) Viewed 9220 times

[ERLover]

Thanks, you pic and explanations made understanding the start/run process very easy.

[UncleSnick]

Everett,

This is Perfect!! I just completed a reverse job with much help from posts from Joshh (https://www.shopsmith.com/ss_forum/main ... ml#p144285) and Bill Mayo. Thanks Josh and Bill!

Without the vision of what was going on internally in the motor, it was a leap of faith when I cut the wire where the power wire attaches to the run windings(2) and start winding in the motor. This is a great addition!

[JPG]

A couple of pesky details:

There are TWO run windings.

The order of the start winding/start switch/capacitor is not important, but they must be in series.

The graphic is excellent for gaining understanding.

[jsburger]

A couple of pesky details:

There are TWO run windings.

The order of the start winding/start switch/capacitor is not important, but they must be in series.

The graphic is excellent for gaining understanding.

Schematics/wiring diagrams are essential to understanding any piece of equipment. It is almost impossible to trouble shoot something if you don't know how it is put together (wired).

Thanks Everett. I am sure your diagram will help many here.

[everettdavis]

Here is a graphic representation that includes two run windings. It is not a formal schematic, it is a graphic representation to aid in visualization.


Everett

Circuit to Motor with 2 Run Windings.png (54.81 KiB) Viewed 8891 times

Here is a typical Shopsmith motor start relay into which I inserted a schematic representation for connections.

Motor Start Relay with imbedded Schematic.png (1.14 MiB) Viewed 8889 times

[everettdavis]

John,

Here is something I put together last year for a more traditional schematic representation of the motor circuit(s) that has both sets of windings.

Everett

General Schematic for Capacitor Start Motor with Start Relay or Centrifugal Switch.png (60.26 KiB) Viewed 8819 times

[jsburger]

John,

Here is something I put together last year for a more traditional schematic representation of the motor circuit(s) that has both sets of windings.

Everett
General Schematic for Capacitor Start Motor with Start Relay or Centrifugal Switch.png

Yes, perfect!!!

[JPG]

John,

Here is something I put together last year for a more traditional schematic representation of the motor circuit(s) that has both sets of windings.

Everett
General Schematic for Capacitor Start Motor with Start Relay or Centrifugal Switch.png

Yes, perfect!!!

Almost. Usually only one start winding or they are in series.(i.e. only two wire ends) Meaning quite clear as is.

[everettdavis]

Good catch JPG. One of my mentors corrects me!

Here you go.

Everett

General Schematic for Capacitor Start Motor with Start Relay or Centrifugal Switch - corrected.png (59.52 KiB) Viewed 8759 times