Alpha Piezo Hotend Z-Probe Mini Groovemount/Titan 20mm piezo by DjDemonD

Last crawled date: 3 years ago

Update 14-05-2017 This unit is now in release candidate and is available here:http://www.thingiverse.com/thing:2319993
Also available to buy ready made at http://www.precisionpiezo.co.uk/shop
Update 16-7-17 latest thinking in terms of firmware setup can be read here http://forums.reprap.org/read.php?1,767998,page=9
Update 07-03-2017 Made a version for titan (or generic groovemount) where the top piece is two parts (instead of 3). Should be quite tight in the groovemount. Print it 100% infilled with moderate-high nozzle temperature for good layer adhesion. I have kept the 3 part top available in case you need it.
Update 05-03-17 - changed the length of the groove mount piece for titan so it should be snug against the base of the titan when fitted. Don't file/adjust the groove mount flange after printing its better if its a tight fit.
Update 05-03-17 - changed titan mount system (again), now the top plate of the sensor assembly is printed in two parts and then bonded back together at assembly, this enable the sensor surface and the surface for the groove mount adaptor to be smooth and free from support material.
Description
So not going to put a lot of detail here you can get the majority of the info on these devices from
http://reprap.org/wiki/Piezo-electric_sensorshttp://www.thingiverse.com/thing:2069480
This is a miniature version piezo z-probe module using 20mm piezo. I have not enough time or a suitable machine to fully test it, but I have done some work on basic feasibility and it will trigger when connected to a piezo sensor signal conditioning board which you can make as per the circuit diagram in the wiki page above or by contacting Moriquendi on reprap forum who can sell one to you for a very modest amount, please be patient as he makes them in batches at home.
Assembly: important - drill out the 4x screw holes in the clamp/lower part to 3.2mm approx so that the screws do NOT bind or stick, the lower part needs to be able to "slide" on these screws (it's only 0.1mm). I used countersunk screws which can be screwed into (threaded) the top part to keep them fixed and steady, then m3 nuts or locknuts below the clamp/lower part. Do them up just beyond hand tight and evenly.
This unit could be integrated into a carriage, the titan version print it as orientated and then bond (acetone/superglue) the e3d groove mount piece into the top plate. This is necessary as the recess for the piezo needs to print well and should be upwards. Youll need a little support for the groove mount, this has to have a square collar to work so no easy support free orientation is possible.
If you make and test one please feedback to me via thingiverse any issues.
New drafts/revisions will appear here as/when.