Continuous auto reverse DC motor2

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kusmanf

Joined Jul 25, 2011
1
New to all this. My first post.
I have a 120VAC to 24V Transformer that I want to power a 24VDC motor.
I want this motor to have a main power on/off switch, but once it is turned on I want it to run in one direction until it hits a limit, then reverse automatically and return to the other limit, and then automatically reverse again continuously until I turn off the power. What switches and relays do I need and how do I connect them?
I have developed a relay circuit to work with 24V DC which works well practically. I have introduced delay relays to overcome relay chatter. You can ask me any question regarding this circuit.
 

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MaxHeadRoom

Joined Jul 18, 2013
20,405
To avoid undue stress on a motor and also the supply, especially if running at full voltage at the time of reversal, it would be prudent to include a time delay to allow/detect zero rpm before reversal occurs.
In some cases, depending on mechanism used, a mechanical reversal takes place and allows one continuous direction of the motor.
Have you looked at wiper motor mechanism methods?
Max.
 

djsfantasi

Joined Apr 11, 2010
6,334
To avoid undue stress on a motor and also the supply, especially if running at full voltage at the time of reversal, it would be prudent to include a time delay to allow/detect zero rpm before reversal occurs.
In some cases, depending on mechanism used, a mechanical reversal takes place and allows one continuous direction of the motor.
Have you looked at wiper motor mechanism methods?
Max.
Wiper motors don’t reverse, right? The reversing action of the wiper is purely mechanical. The cam has a cut-out where a limit switch allows the blades to park in a down position.

At least the wiper motors I know of. Used them all the time in mechanisms for Haunted House props.
 
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