On 03/06/2020 05:38 PM, Gene Heskett wrote:
I have now put 2 ATD667LSG's on this block and have failed to get a
working index pulse into linuxcnc thru the encoder index pin of a 7i76D.
Note these sensors are open-collector, so need a pull-up
resistor.
I've mounted it branded face against a block of alu, with a green 3 pin
socket to allow unplugging it quickly, and I jbwelded a piece of a nail
to the side of the drawbar cap/bolt retainer at the top of the spindle,
but I can't get a false out of it at any orientation of the nail or a
tool waved past it.
The sensor is on the end where the leads come out of the
package, but at right angles to the
leads. That's the "branded face". So, it sounds like you
have them mounted backwards.
The gear tooth needs to wipe sideways across the sensor to
be registered. So, a gear
tooth that is parallel to the leads will be sensed as it
wipes across the face of the sensor.
Motion of the tooth will be at right angles to the leads.
Check if the sensor +5 V is drawing any current (should be
about 7 mA). Are you sure you have not
connected to the "test" output (pin 3)? They don't say what
this pin does, just tell you "tie to ground or
leave open".
Jon
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