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Modifying a Mark V Green to have reverse.
Posted: Wed Feb 12, 2014 10:59 pm
by jeffo
I've heard that a reverse modification can be done, but haven't been able to find the plans. I've read that you can achieve a better finish by using reverse along with forward when fine sanding and polishing.
I just inherited a Mark V Green Serial Number 314673. The unit has not been used in probably 25+ years, so I am preparing my work bench to completely disassemble the headstock and replace bearings, stripped set screws, belts and other aged parts, as well as grease, oil and wax needed parts.
Question is while I have the headstock on the bench and disassembled I would like to do this modification,
Where can I find the steps for this??
Has anyone ever done this?
Are there any cons to doing this??
Any help would be appreciated!!
Thank you
Jeff
Posted: Wed Feb 12, 2014 11:17 pm
by beeg
You WON'T need any grease. What's the brand on the motor?
JoshH
Posted: Wed Feb 12, 2014 11:37 pm
by 2centsworth
Contact JoshH here on the forum. He is your guy !
Posted: Thu Feb 13, 2014 2:04 am
by jeffo
I just needed to go back to my motor notes from 1985, dah!
Now that I figured out how to reverse the direction, is it safe to do with this my Greenie?
Thank you
Posted: Thu Feb 13, 2014 2:09 am
by JPG
jeffo wrote:I just needed to go back to my motor notes from 1985, dah!
Now that I figured out how to reverse the direction, is it safe to do with this my Greenie?
Thank you
No sweat!;)
Reverse the start circuit polarity.
Posted: Thu Feb 13, 2014 10:02 am
by beeg
[quote="JPG40504"]No sweat!]
JPG HOW wood ya do that with an Emerson motor?
Posted: Thu Feb 13, 2014 11:36 am
by joshh
jeffo wrote:Where can I find the steps for this??
Has anyone ever done this?
Are there any cons to doing this??
See here:
https://forum.shopsmith.com/viewtopic.php?t=12664
The guide is accurate and complete, but I am working it to make it prettier and less wordy. The steps will not change.
The only "con" anyone has mentioned is with regards to the Gilmer headstocks (which you have). Sometimes the belt does not want to track correctly in reverse and may have some edge fraying if not corrected. It will take some tweaking and needs to be run under observation.
beeg wrote:JPG HOW wood ya do that with an Emerson motor?
The Emerson motor has a shared connection between one side of the start winding and one side of a run winding. This shared connection is hidden somewhere in the motor and nobody knows exactly where yet. There is an old thread in which someone stated they had a motor shop reverse their Emerson, so I know it's possible.
I have an Emerson motor in my Mini waiting to be explored but that's at the bottom of my long to-do list.
Posted: Fri Feb 14, 2014 12:54 am
by JPG
beeg wrote:JPG HOW wood ya do that with an Emerson motor?
Gotta get to both ends! Where one end is, nobody knows.
