From: Spehro Pefhany
Subject: Re: Switching Stepper Motor On/Off
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Date: Fri, 10 Jan 2003 18:46:48 GMT
NNTP-Posting-Date: Fri, 10 Jan 2003 13:46:48 EST
On Fri, 10 Jan 2003 18:45:00 GMT, Spehro Pefhany
>On Fri, 10 Jan 2003 14:36:16 GMT, the renowned Stan F.
>>I have some small-volume digital liquid pumps that I'd like to turn on/off.
>>The pump itself is a stepper motor controlled by the circuit board. I've
>>tried interrupting some transistors to turn off the motor, but no luck. Is
>>there an area of the board or some individual component that would control
>>the on/off state of the motor, or is it more likely built into the "brain" of
>>the circuit board.
>>I'm trying to set up a remote float switch to turn the pump on/off.
>>Any help would be appreciated.
>It's going to be difficult with your rudimentary knowledge and no
>schematic. If you break one or two of the wires to the stepping motor
>with a relay, that will probably work fine. There are likely 4 or 6
>wires going to the motor.
P.S. If this is something like a peristaltic metering pump, the
controller will still think the pump is turning, so the display will
probably not do what you want!
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