Touch Probe

Touch Probe Information

You can choose any input-mode parallel port pin--10, 11, 12, 13, or 15. connect it in your hal file with a line like

net probe parport.0.pin-10-in => motion.probe-input

If the signal is inverted (starts at 5V when probe is not in contact, goes to 0V when the probe makes contact), then use the inverted version of the pin:

net probe parport.0.pin-10-in-not => motion.probe-input

Links to home built touch probes

http://www.indoor.flyer.co.uk/probe.htm

http://www.brusselsprout.org/CNC/1P-Probe/

http://www.cnczone.com/forums/digitizing_laser_digitizing/28308-who_want_make_touch_probe.html

http://www.cnczone.com/forums/digitizing_laser_digitizing/22837-cheap_home_made_touch_probe.html

The original Renishaw probe patent (now expired):

http://www.google.com/patents/ Then enter patent number 5146691

This is a simple alternative for the balls/rod arrangement of the Renishaw touch probe.: