Is this right?

[rattus]

Sorry I only followed the one line. My bad.

That's OK. I made a mistake once--thought I was wrong!

 

[rattus]

For the Record:

For the Record:

Here is the diagram for a simpler speed control.

 

[cadpoint]

Here is the diagram for a simpler speed control.

Rattus, I appropriate what your showing in this thread, I do have a few questions though:

This last diagram (#22) is a simpler one line diagram, I had to get real close to see a little gray line extend across the two "contacts", four total on the main windings. I checked back to #1 thread and yes they are there, I had missed this earlier.

Until I saw the gray what I was going to ask is how a complete path was accessed /gained across what looked liked isolated terminal points! (?)

I don't understand how the reverse terminal points work, is it a N/O contact, or is the reverse switch physically rotating to the contact point?
Or does a reverse switch work as to were it touchs the Main coil and the coil is still harded wired across the terminals, based on this or the first question?

Does a speed switch work by having internal arms, locked in position, (like arms of a clock) that sweep into the position to the desired application?

Thanks in advance, Great thread BTW !

PS: I have a Great motor book, I'm not to lazy to open it. I just wanted to get those at home playing along to also THINK! :roll:

 

[rattus]

Rattus, I appropriate what your showing in this thread, I do have a few questions though:

This last diagram (#22) is a simpler one line diagram, I had to get real close to see a little gray line extend across the two "contacts", four total on the main windings. I checked back to #1 thread and yes they are there, I had missed this earlier.

Until I saw the gray what I was going to ask is how a complete path was accessed /gained across what looked liked isolated terminal points! (?)

I don't understand how the reverse terminal points work, is it a N/O contact, or is the reverse switch physically rotating to the contact point?
Or does a reverse switch work as to were it touchs the Main coil and the coil is still harded wired across the terminals, based on this or the first question?

Does a speed switch work by having internal arms, locked in position, (like arms of a clock) that sweep into the position to the desired application?

Thanks in advance, Great thread BTW !

PS: I have a Great motor book, I'm not to lazy to open it. I just wanted to get those at home playing along to also THINK! :roll:

The reverse switch is not shown in detail. It is a simple DPDT slide switch wired to swap ends so to speak on the RUN winding. It could be inserted into the AUX winding instead.

This switch is the first thing one should check on a non-working fan because the slide may be accidentally left between FWD and REV in which case RUN is not energized.

 

[LarryFine]

I don't understand how the reverse terminal points work, is it a N/O contact, or is the reverse switch physically rotating to the contact point?

It actually works like a 4-way switch, which is a reversing switch. In the schematic, it's effectively turning the left-hand coil over, reversing the direction of the current through it.

Does a speed switch work by having internal arms, locked in position, (like arms of a clock) that sweep into the position to the desired application?

Basically, yes. There's an insulated piece that rotates with the knob and carries a conductive strip as it spins. Open one up some time.