Motor control Boards

[fido]

If you are handy with a soldering iron you could make up a continuously variable speed control using one of the existing boards for the triac and heat sink. I made one for my father as a speed controller for his old '50s electric drill when I was a teenager.

This circuit may not be suitable but is an example of how simple they can be:

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streampowers.blogspot.hu

 

[tolivac]

Not only fans and motors-but I have seen that same circuit used in incandescent light dimmers.It could be used for flourescents-but the lamp has to have a dimming ballast to work.

 

[meadowbank]

Variable speed motors

Hello Dave, the issues of MEW you want are numbers 86 & 88 and the author is Vasilii Zakharov. Be very careful with these motors as there are exposed live wires and the motors will jump when switched to full speed. I clamp the motor to the bench if I am working on it out of the washing machine.

 

[davetranter]

Meadowbank

Thanks, Meadowbank for the info.... I'll try to find copies online.

My intened use is powering a small lathe/miller, so closed-loop control would be best. Does anyone have any 'detailed' experience of working with the TDA1085C controller I.C.?? I can't work out from the 'example circuit' given on the chip data sheet whether it is controlled by the servogenerator voltage or frequency...

Any and all input would be appreciated, including on older 'non-chip' controllers.

Many thanks

Dave T

 

[davetranter]

Come on, folks.....

Surely SOMEONE has had a 'play' with motors and controllers before!!! I have thought of several more potential 'projects', including a motor-generator set, for which close speed regulation will be a 'must'....

Can anyone help???

All best

Dave T

 

[fido]

The information that crouzet provided should be enough to get something working. If you look at one of the boards you should see that there is a series of resistors for switching in different speeds. To get a simple switched speed control you could get a multi position wafer switch such as would be used in a radio for wavechange selection. Alternatively you could look at the lowest and highest resistors and select a potentiometer to suit that range. If you connect that between the connections for the highest fixed speed selection you will have continuously variable speed. If your application needs it you could also wire up a direction change switch as per the wiring diagram.