From: Spehro Pefhany
Subject: Re: Switching Stepper Motor On/Off
X-Newsreader: Forte Agent 1.92/32.572
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!
"it's the network..." "The Journey is the reward"
firstname.lastname@example.org Info for manufacturers: http://www.trexon.com
Embedded software/hardware/analog Info for designers: http://www.speff.com