Shopsmith Forums

dyenf wrote: Presently, I have just been removing the entire headstock assembly and reversing the unit to drive alternators, generators, and/or magnetos in the opposite direction.
Fred

Why not run the alternators in reverse ? They are three phase alternators and I don't think it matters to the diodes which phase is first, second , or third.

The motor is a model Number C55DDR-2015C.

I contacted the motor manufacture - Emerson and they indicated that the motor was non-reversible, however I took the motor to a local shop and the owner indicated that it would not be a problem to reverse the motor. He qouted me $80.00 and will be setting up the motor with a reversing switch for that price.

I will provide a schematic as soon as the work is finished.

Fred

fred; please ask this gentleman for a diagram of what he does.

If you would share that information I know that you would solve similar problems for several of us. I'm not inclined to attempt this sort of work on my own but it would help to know what one is asking for when approaching a motor technician.

I'm pleased for you that you have found someone to do what you need.

dyenf wrote: ....................I will provide a schematic as soon as the work is finished.

Fred

Hi Fred,
Any more info on this yet?

I have had the motor successfully reversed for the $80.00 I was quoted. That included the reversing switch and wiring.

Any competent AC electrical shop should be able to do the job. I'm still awaiting a wiring schematic, although I'm not sure the shop will be forthcoming.

Fred

Does the data plate on the motors you had rewired identify the motor as being "non-reversible".

I am just checking. My motor is the same part number and the data plate contains this statement.

Dusty:

The motor notes that it is non-reversable, however that is not true.
I've attached a drawing with the switch to reverse the motor. I had our motors reversed by:
Ashby Electric
157 Lee Highway
P.O. Box 857
Verona, VA 24482
(540) 248-2885

Fred

Most AC motors are wired for only one direction rotation. If the motor has a field winding switch/relay (all shopsmith motors I have seen has one), you will need access to the centrifugal field winding switch or the field winding relay to add the reversing capability. The diagram in one of the posts does not show the capacitor and how it is connected. It should only cost the price of a 3pdt switch ($10 or less) and wires to connect it. On some motors you will need a bracket to mount the switch or drill a hole in the motor pan for the switch. I will take some pictures of the various actual motor end pieces with the field winding switch or relay and the wires connected to the reversing switch. Shopsmith has used a few different start winding configurations with each one needing a little different hookup. Since this is not an authorized Shopsmith modification, I must state that I do not recommend it. It should only be done at an authorized electric motor shop. With liability issues covered and understood, Email me for information if interested.

Bill Mayo http://www.billstoolz.com
annbill.mayo@comcast.net

dusty wrote:Does the data plate on the motors you had rewired identify the motor as being "non-reversible".

I am just checking. My motor is the same part number and the data plate contains this statement.

In your case why not just make the mount that you fabricated reversible to change the direction the alternator, etc. faces? That will change rotation of the driven part without the motor reversing. Easier I would think and without potential for electrical glitches - $$$$$

dyenf,

Thank you for the info that you provided, regarding how you have managed to make your Shopsmith motor(s) reversible.

However, the diagrams provided are somewhat confusing. They are not Shopsmith specific and there are two different (solutions); at least it seems that way to me.

Your experience clearly shows that if you want to reverse the Shopsmith motors it can be done.

However,I hope you realize that having done this, Shopsmith warranties have been voided.