Touch Probe

thingiverse

This thing is heavily inspired (and partly copied) from http://www.brusselsprout.org/CNC/1P-Probe/ further inspired from http://hydraraptor.blogspot.dk/search?updated-max=2007-06-03T18:25:00%2B01:00&max-results=3&reverse-paginate=true and this http://www.machsupport.com/forum/index.php/topic,5004.0.html. So basically we (Jakob and I) remixed it - to fit our printer. 6/6-2018 updated with a 3 wire configuration and ATTINY85 - PCB and arduino code now added. This is a two-part housing with internal wires and a small PCB. Print the two parts and assembly: 1) Remove blobs and kinks from the prints (nicefy your print). 2) Push a four-wire flat-cable into the housing. 3) Split into four strands and knot one of the edge wires. 4) Fiddel the three wires up the internal channels and out the top. 5) Take the last (with the knot) through a spring 6) Screw the spring onto the rest of the wires. So the wires stick out of the spring close to the top (not to close as the spring will squeeze the wires). 7) Adjust length on the three wires and strip them for soldering 8) Solder on three pins from a pinheads (I used straight pins and bend them after soldering) 9) Mount a disk (a Danish one Krone - fits perfect) with a hole on a MTSB M3X15 bolt and tighten it. Do not modify the one krone - the rim it has makes it perfect. 10) Strip and wrap the forth wire (with the knot) around the treads of the HTSB bolt and secure with a second nut. 11) Add lid with 3 times M3x12 hex bolts and the disk on the HTSB bolt and keep the lid open. 12) Align the pins (see images - this is impossible to write) so they sit between the disk and the lid held by the tension of the spring. 13) Tighten the lid. 14) Fit a plug to the end of the four-wire flat-cable. 14,5) Pyhhhh take a brake all that fiddling is hard. 15) Mill a PCB (or get it in another way) solder on components and pinheads. 16) Make a stylus (Min is from a M3X25 bolt filed while rotating in my drill press. Mount finger tight. 17) Connect some power (5V’ish) and test if the sensor works. (LED light up when in contact with something). Mount and enjoy.