I have a turntable, which rotates cw and ccw, this turntable is rotated by AC synchronous motor of 230V. I want to be able to rotate the turntable with Arduino for this reason I need to control the switch (toggle switch) of the turntable. This switch is connected with motor with three wires one of the wires is for cw rotation the other ccw and the middle one is common or no rotation. Problem is that I need to make sure that only one direction of the rotation will work on the same time otherwise motor may be damaged. So I need to have some restriction not only in program but also in electrical components. I am thinking if there is any relay that can be connected with both rotations and also with common so it will not be possible that motor will get electricity for both directions. Or any other idea would be appreciated.
3 pole relay with volts to contacts and common to motor.
Use a second relay in series for on off.
You might need a software delay for the botor to stop before reversing direction.
I have never found a relay with 3p3t but you can use use a set of 2 relays to do this. but i am worried about your motor pin-out as there really is no use for a common power lead are you sure its not the neutral lead??? Unless there is a break of some sort or a multi speed for one direction or the other. Could you post a link to the motor or at least a pic of it so we can help you better.
Sounds like a On/Off/On toggle switch with center off. What you refer to common may be the hot lead that is switched between two windings? In that case, yes, two relays will do it. A on/off relay controlling or connecting to a Forward/Reverse relay.
You need to use two relays. First a DPST where the common goes to the motor and the NC to CW and NO to CCW. The second SPST relay just switches the motor common. In your arduino you would use two digital output pins each using a switching transistor to control each relay coil. In your software one output is motor on/off and the other output is rotation direction. It would not be possible to switch on CW and CCW at the same time in error as it's a single digital output.
Thank you all for your replays,
and yes @drksam i think u are right is neutral, and here is a diagram of my turntable.
And can anyone tell me how should I do this connection between two relays, I am really sorry but I am new in electronics if you have any links or something when it is explained
Hope this helps sorry fore the poor quality drawing. Then just wire in the cap and suppressors like the relays were 1 switch. BTW its not a triple poll triple throw you need a 3pos switch with off in the middle i would probably do this with triacs tho.
