got cheap on ebay a box with forward reverse stop buttons, but that's all it
is, the box and contactors under the buttons.  The start buttons have
push-to-make switches and the stop one has push-to-break.

So... can I make it drive the single-phase motor on the lathe, forward and
reverse, and if so what else does it need.  I already have
stop-start-overload switch thing, but that only goes one way.  It's also not
no-volt release, which is not ideal.

currently, reversing is done with a pair of SPDT switches, which is far from
ideal, especially as they're only just big enough current rating.
-- 
Austin Shackles.  www.ddol-las.net  my opinions are just that
Travel The Galaxy!  Meet Fascinating Life Forms...
------------------------------------------------\   
   >>  http://www.schlockmercenary.com/  <<      \  ...and Kill them.
a webcartoon by Howard Tayler; I like it, maybe you will too!

Austin Shackles wrote:
> got cheap on ebay a box with forward reverse stop buttons, but that's all it
> is, the box and contactors under the buttons.  The start buttons have
> push-to-make switches and the stop one has push-to-break.
> 
> So... can I make it drive the single-phase motor on the lathe, forward and
> reverse, and if so what else does it need.  I already have
> stop-start-overload switch thing, but that only goes one way.  It's also not
> no-volt release, which is not ideal.
> 
> currently, reversing is done with a pair of SPDT switches, which is far from
> ideal, especially as they're only just big enough current rating.
Use your existing stop start overload as the NVR and starter and wire 
the new box as a latching forward/reverse switch.
Bob

On 16 Aug, 19:14, Austin Shackles
 wrote:
> got cheap on ebay a box with forward reverse stop buttons, but that's all it
> is, the box and contactors under the buttons.  The start buttons have
> push-to-make switches and the stop one has push-to-break.
> ........
Strangely enough I was asked to produce a reversing controller for a
type of tumbling machine very recently.

It has on and off push buttons and a three position switch for
forward, off, and on. In the off position the start button does
nothing but when set to forward or reverse then the on button starts
the motor in the relevant direction and latches a NVR.
If you reverse the direction switch while the motor is running the NVR
drops out as the switch passes through the off position, stopping the
motor,  which you can start again by pressing the on button.

The NVR and fwd/off/rev switch only carry control currents.

Circuit diagram can be seen at: www.chainganger.co.uk/Reverser.pdf
(File name is case sensitive)

Bob

On or around Fri, 22 Aug 2008 16:51:38 -0700 (PDT), BobKellock
 enlightened us thusly:

>On 16 Aug, 19:14, Austin Shackles
> wrote:
>> got cheap on ebay a box with forward reverse stop buttons, but that's all it
>> is, the box and contactors under the buttons.  The start buttons have
>> push-to-make switches and the stop one has push-to-break.
>> ........
>Strangely enough I was asked to produce a reversing controller for a
>type of tumbling machine very recently.
>
>It has on and off push buttons and a three position switch for
>forward, off, and on. In the off position the start button does
>nothing but when set to forward or reverse then the on button starts
>the motor in the relevant direction and latches a NVR.
>If you reverse the direction switch while the motor is running the NVR
>drops out as the switch passes through the off position, stopping the
>motor,  which you can start again by pressing the on button.
>
>The NVR and fwd/off/rev switch only carry control currents.
>
>Circuit diagram can be seen at: www.chainganger.co.uk/Reverser.pdf
>(File name is case sensitive)

The circuit I've just done would do that too, except that I happen to have
the set of 3 buttons.
-- 
Austin Shackles.  www.ddol-las.net  my opinions are just that
Travel The Galaxy!  Meet Fascinating Life Forms...
------------------------------------------------\   
   >>  http://www.schlockmercenary.com/  <<      \  ...and Kill them.
a webcartoon by Howard Tayler; I like it, maybe you will too!

On Aug 23, 9:18 am, Austin Shackles
 wrote:
> On or around Fri, 22 Aug 2008 16:51:38 -0700 (PDT), BobKellock
>  enlightened us thusly:
>
>
>
>
>
> >On 16 Aug, 19:14, Austin Shackles
> > wrote:
> >> got cheap on ebay a box with forward reverse stop buttons, but that's all it
> >> is, the box and contactors under the buttons.  The start buttons have
> >> push-to-make switches and the stop one has push-to-break.
> >> ........
> >Strangely enough I was asked to produce a reversing controller for a
> >type of tumbling machine very recently.
>
> >It has on and off push buttons and a three position switch for
> >forward, off, and on. In the off position the start button does
> >nothing but when set to forward or reverse then the on button starts
> >the motor in the relevant direction and latches a NVR.
> >If you reverse the direction switch while the motor is running the NVR
> >drops out as the switch passes through the off position, stopping the
> >motor,  which you can start again by pressing the on button.
>
> >The NVR and fwd/off/rev switch only carry control currents.
>
> >Circuit diagram can be seen at:www.chainganger.co.uk/Reverser.pdf
> >(File name is case sensitive)
>
> The circuit I've just done would do that too, except that I happen to have
> the set of 3 buttons.
> --
> Austin Shackles.  www.ddol-las.net my opinions are just that
> Travel The Galaxy!  Meet Fascinating Life Forms...
> ------------------------------------------------\  
>    >>  http://www.schlockmercenary.com/ <<      \  ...and Kill them.
> a webcartoon by Howard Tayler; I like it, maybe you will too!- Hide quoted text -
>
> - Show quoted text -

Austin

I've tried to send you two diagrams for using your 3-button set-up.  I
hope I goy your e-mail address right.

Any questions, e-mail me direct.  I can also supply a third diagram
using relays instead of Contactor Aux contacts.

Regards
Andy

On or around Sat, 23 Aug 2008 08:29:15 -0700 (PDT), houstonceng
 enlightened us thusly:

>
>I've tried to send you two diagrams for using your 3-button set-up.  I
>hope I goy your e-mail address right.

yep, got 'em. 
-- 
Austin Shackles.  www.ddol-las.net  my opinions are just that
Travel The Galaxy!  Meet Fascinating Life Forms...
------------------------------------------------\   
   >>  http://www.schlockmercenary.com/  <<      \  ...and Kill them.
a webcartoon by Howard Tayler; I like it, maybe you will too!

On 23 Aug, 00:51, BobKellock  wrote:
> On 16 Aug, 19:14, Austin Shackles wrote:
> > got cheap on ebay a box with forward reverse stop buttons, but that's all it
> > is, the box and contactors under the buttons.  The start buttons have
> > push-to-make switches and the stop one has push-to-break.
> > ........
>
> Strangely enough I was asked to produce a reversing controller for a
> type of tumbling machine very recently.
>
> It has on and off push buttons and a three position switch for
> forward, off, and on. In the off position the start button does
> nothing but when set to forward or reverse then the on button starts
> the motor in the relevant direction and latches a NVR.
> If you reverse the direction switch while the motor is running the NVR
> drops out as the switch passes through the off position, stopping the
> motor,  which you can start again by pressing the on button.
>
> The NVR and fwd/off/rev switch only carry control currents.
>
> Circuit diagram can be seen at:www.chainganger.co.uk/Reverser.pdf
> (File name is case sensitive)
>
> Bob

Thats what Ive just done, exactly how you say

NVR will take 16 amps .

when the reversing switch is knocked between forward and reverse it
goes through a middle region that knocks the main power off to the nvr
through the bottom drum

why Austin is making it so complex i don't know.

All the best.markj

On or around Sat, 23 Aug 2008 12:50:18 -0700 (PDT), mark
 enlightened us thusly:

>
>Thats what Ive just done, exactly how you say
>
>NVR will take 16 amps .
>
>when the reversing switch is knocked between forward and reverse it
>goes through a middle region that knocks the main power off to the nvr
>through the bottom drum
>
>why Austin is making it so complex i don't know.


well, it's no fun otherwise.  And I don't happen to have 2 4-pole
contactors.

The circuit I'm messing with could very easily use an on-off-on changeover
switch, but I happen to have a nice box with 2 green and one red buttons on
it...  The existing switch has overload but not NVR, and the existing
reversing is done by 2 off SPDT switches which are not really up to the
starting current, but were to hand at the time.

-- 
Austin Shackles.  www.ddol-las.net  my opinions are just that
Travel The Galaxy!  Meet Fascinating Life Forms...
------------------------------------------------\   
   >>  http://www.schlockmercenary.com/  <<      \  ...and Kill them.
a webcartoon by Howard Tayler; I like it, maybe you will too!