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Complicated Diversions (Rotating Monitor, Yes or No)
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Cornchip:
   Simply the best info yet posted on this topic thus far. This DPDT design is almost exactly what I did for my machine. One thing  (perhaps small) that I did not do is install the diodes. I understand the reason a diode is used (current only flows one direction) but not in this application unless it has something to do with the switch design itself (more contact points than a standard DPDT) making diodes unnecessary. Are diodes still a possibility here? I used an Allen Bradley surplus part from a panel at work #800T J631 that has a spring return to center and reversed contacts either side of center. It hides nicely under the front of the CP with the use of a custom bezel.

 http://www.westburnedirect.ca/alberta/Assets/prodtec/Elec/381.pdf

 Cornchip.

 

DaOld Man:
Nice looking setup there cornchip! Cool video too. :applaud:
I used the diodes in my drawing to allow reverse current to pass around the opened limit switches.
The diodes have nothing to do with the DPDT switch.
Its just that with my drawing, you flip the switch to one position, it stays in that position.
The monitor turns until it opens a limit switch. The limit switch opening stops the motor.
Now when you flip the switch to rotate in the opposite direction, the motor wont start because the first limit switch is still open.
Here is where the diodes come into play.
Since the current is flowing in the opposite direction, the motor starts because the diode allows the current to flow around the open limit switch.
The limit switch closes as soon as the monitor rotates off the stop, but the diode is necessary to allow the motor to start turning.
In your spring return to center switch, limits are not needed, so diodes are not needed, however if someone held the switch after the monitor has reached its mechanical stops,
(I'm assuming you have some sort of mechanical stop), damage could be done to the motor by trying to run it when it cant turn anymore.
In this case you may still want to use limit switches, and the easiest way to handle those are using the diodes IMHO.
BTW, the DPDT switch is doing the same thing as the two relays CWR and CCWR do in my first drawing.
Cornchip:
 Ok...it is the difference in the switch (I have limits also making this a crash free design). When I reach either limit switch my power is cut to the motor if the key is held. Release the key to center and all power is removed. Flip the key the opposite way and the other closed limit will allow travel back to that limit. If I stop the rotation half way through I can always go back as both limits will be closed. The switch design is 'interlocked' preventing a ground out.

 Cornchip.
DaOld Man:
Looks good.
Do you have a schematic, or wiring diagram?
Cornchip:
  I might need your help cleaning up my diagram. The switch I have has 8 connects. I think it is really just two identical double contactors that move at the same time (reversing only the + and - and both limits). I have no idea how to draw the switch but I'll give it a try. When I have it I will scan it to JPG.

 Cornchip.
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