Revering and Ressetting Motor

[red300zx99x]

Need help with a project in which at the touch of a button have a motor turn forward until a certain point then reverse back to the original position then stopping and ressetting to start again at the command of the button. Have been informed that this is possible witht the use of PLCs, true? And if so can some one lead me in the right direction.

 

[red300zx99x]

Pardon my spelling

 

[xyzz]

Yes, it's a relatively simple task for PLC.
You will need an inexpensive PLC with a high-speed output.
It will generate pulse train for stepmotor or servomotor controller.
If you post more details about the application, I could suggest you system configuration.
The necessary details are at least:
- Estimated motor speed and power.
Also, how far a motor load will vary?
- Does the unit require settings?
If yes, you will need some human-to-machine interface (HMI).
- Is it a standalone unit or you want it on a network?
- Is it a budget project?
- Do you have any brand/model preferences for PLC/HMI and servo or stepper?

 

[buzzp]

You would not even need a PLC. Most likely, it would be easier to do with standard controls (limit switches and reversing contactor) especially if you have not messed with PLC's. Just a suggestion.

 

[red300zx99x]

It's a doorbell that has a guy move forward for say a foot then back to the start

 

[buzzp]

Seems like overkill even for a PLC then. Not to mention buying the software to program the PLC. But if your going to be doing other things like this it might be worth buying.
The doorbell will energize a little relay (assume the motor is just a real little fella). At the end of the stroke, the limit switch will close (or open depending on what relay or contactor you use) initiating the reversing action (reversing contactor coil energizing). What kind of motor do you have to turn on?

 

[jraef]

How far does it need to move and how heavy is it? It may be easier to do it with a solenoid actuator if it is small and moves no more than a couple of inches.

"Venditori de oleum-vipera non vigere excordis populi"

 

[red300zx99x]

Movement about a foot, hmmm an actuator, that seems much more simple.