Trevor Rymell
Member
Dear All
Can anyone suggest a circuit for this small stepper motor controller I want to build. I'm sorry for not knowing the correct nomenclature so I hope this description will suffice. I'm sure this type of system crops up in industrial machine control very frequently. It's possible someone might know of a kit out there.
I want to build a small stepper motor controller which will consist of a small hand held enclosure with a knob. Inside will be I suppose some kind of encoder. The encoder and associated circuit will send signals via a cable to a small stepper motor so that the rotational direction and arc of movement of the motor exactly matches that of the control knob. The whole thing will need to run from a small DC battery pack maybe 6v possibly built into the controller enclosure.
The application I have in mind is a focus control for a video-camera. The stepper motor will turn the focus ring of the camera lens via a gear or small drive belt exactly matching the movements of the control knob. Such systems are just becoming commercially available but are horrendously expensive. It seems to me this shouts DIY quite loudly.
Thanks in advance.
Trevor
Can anyone suggest a circuit for this small stepper motor controller I want to build. I'm sorry for not knowing the correct nomenclature so I hope this description will suffice. I'm sure this type of system crops up in industrial machine control very frequently. It's possible someone might know of a kit out there.
I want to build a small stepper motor controller which will consist of a small hand held enclosure with a knob. Inside will be I suppose some kind of encoder. The encoder and associated circuit will send signals via a cable to a small stepper motor so that the rotational direction and arc of movement of the motor exactly matches that of the control knob. The whole thing will need to run from a small DC battery pack maybe 6v possibly built into the controller enclosure.
The application I have in mind is a focus control for a video-camera. The stepper motor will turn the focus ring of the camera lens via a gear or small drive belt exactly matching the movements of the control knob. Such systems are just becoming commercially available but are horrendously expensive. It seems to me this shouts DIY quite loudly.
Thanks in advance.
Trevor