DC motor speed control

[Ian Colman]

Hi Amit,

Well I can't really recommend a definite method that you could use to control the motor speed untill you have settled on a drive to be used. This is because the signals to be passed to a motor drive vary from drive to drive so once you have some sort of definite interface we can discuss this further. Although I am more than willing to give all the advice i can on the issue, I do need to know what 3rd party hardware you have and what signals it expects for control.

What is it exactly that you wish to do with LabVIEW ultimatly? Is it just a matter of controlling motor speed or is it something more involved?

Best Regards,

Ian 

[Kaunteya]

Hi Ian,

As you can see from the datasheet which I attached previously, this motor is used specially for generating vibrations.

So increasing speed of motor we will increase the vibrations. That is what we intend to do with motor speed.

At the moment there is no hardware involved apart from motor, its drive and SCB 68 board.

I shall post my query further, once I disuss this interfacing issue with my advisor.

Thanks and regards.

Amit

[Ian Colman]

Hi Amit,

Okay thanks for letting me know. I look forward to hearing from you once you have discussed this further.

Best Regards,

Ian

[AnalogKid2DigitalMan]

Amit:

On the pdf for the motor drive, it shows:

Optional extras,

Additional overloads to run multiple vibs Door interlocked isolator ( IP 55) Digital display of motor frequency Remote control Line chokes, when total length of cables

to vibrators exceeds 10 meters

Digital inverter

Contact the manufacturer and ask about the remote control option- what it does, and what input is needed for control.

-AK2DM

[Kaunteya]

Hi AK2DM,

Thanks for advise, I shall find out about remote control.

Thanks and regards.

Amt

[Kaunteya]

Hi Ian,

I discussed the interface issue with my adviser and the power supply driving the motor is going to remain.

So this makes things easier as power supply has an arrangement, where I can connect 10Volt analog signal (coming from) PC/DAQ. 

So I suppose, no more I need PWM, as I will be using analog voltage to control the motor speed, so varying the voltage I should be able to control motor speed.

If this is OK then, how can I go for it.

I suppose I need to generate analog output (0 to 10 volt), which can be controlled by a knob control from the front panel.

Please advise me on the same.

Thanks and regards.

Amit

[Ian Colman]

Hi Amit,

Okay that sounds good. This is very easy to do in LabVIEW so please take a look at the attached VI.

Best of Luck,

Ian

[Kaunteya]

Hi Ian,

Sorry for late reply, thank you very much for the VI, I was on the correct lines only I used the round knob instead of flat control, you have used. Many thanks.

If I have any further query, I shall post again.

Thanks for your advise.

Thanks and regards.

Amit

[Kaunteya]

Hi Ian,

Last time, the VI you posted for motor speed control (by varying analog ouput).

In that VI, on front panel, how do you decorate the things? Specially that blue line, I am not getting that in function's pallet?

Where can I find it or how can I go about it.

Please let me know.

Regards.

Amit

[Ian Colman]

Hi Amit,

The pallette you need on your front panel is the 'Modern>>Decorations' palette. In here you will find an item called 'Flat Box'. You can then go to 'View>>Tools Palette' and change the colour of the box's border to whatever you want as shown in the attached screenshot.

Best Regards,

Ian