MadModder
The Shop => Tools => Topic started by: colin563 on August 30, 2009, 10:46:44 AM
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not sure if this is the correct place to post
i found this on ebay
http://cgi.ebay.co.uk/DIGITAL-RED-LED-PANEL-FREQUENCY-SPEED-METER-TACHOMETER_W0QQitemZ250488181400QQcmdZViewItemQQptZUK_BOI_Electrical_Test_Measurement_Equipment_ET?hash=item3a52425298&_trksid=p3286.c0.m14
it must be of use in a lathe or mill just need a sensor the selers have sent me a pdf file on this
they have not got a sensor for it ive searched ebay and im not sure what type of sensor i would need
my electronics info is about as good as my model engineering not a lot
it might be a cheap and easy way of adding a tacho to our machines
hope someone can come up with a cheap sensor to work with this
if anybody wants the pdf file on this please pm your email addy for me to send it
thanks colin
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Colin, it says one of the inputs is square wave and you get a form of square wave just by switching a switch off and on so I expect all that would be needed for a sensor would be a magnetic switch (as sold for house security systems) and a magnet stuck to the back of the chuck.