I saw this idea for mounting a piezo for the PrecisionPiezo Z probe and reworked it a bit to become a somewhat universal adapter for the HyperCube Evo printer. In theory this would allow any existing extruder mount that mounts to the standard X carriage (you know - the one with the pins and central screw) to become piezo enabled. Can use 27mm (preferable) or 20mm piezo
- base v1.2 - moved piezo upwatds so it is in a better contact with the pin.
- Added v1.1 with reworked (and supposedly better) pairing between the two halves ,
- Added pictures how the things come together (the extruder mnt on them is a piece I had laying around - used as an example only)
- Added base that takes 20mm piezo disk.
Needed parts (most you should have as leftovers from the original BOM):
- a 27mm piezo, undrilled :) .
- 1x M3x8 brass insert
- 4x 3x12 dowel pins
- 3x M3x12, 2x M3x25, 4x M3x10 screws
- 2x M3 nuts
- I printed mine in PETG with 15% Infill (lines), 0.8 walls. Support (touching) on the base only.
- Finish the parts after printing
- the two nuts and the heads of the screws at the sides of the piezo and in the center of the actuator need to lay flat to the surface - use heat if needed to ensure that.
- The holes for the optical sensors and on the bottom/horizontal part of the base need to become threads, so don't hurry to drill them but do them with the M3 tap instead.
- Make the pins go into the holes
- The two adjustment screws must fit tight but be able to move freely in their holes
- Use file to make the two parts fit together. It must be a snug fit but not super tight.
- Move/mount the X optical endstops to the base plate of the adapter.
- Attach the actuator (the smaller, round part with the bump) to the actual extruder mount you intend to use, using the standard way - pins and central screw from behind.
- Place a 27mm piezo into the nest on the base, positioned with ceramics upwards. Ensure it goes inside - file a bit if needed. If the piezo does not fit snug in place, you can try a small piece of double sided foam tape to stick it there.
- Using the horisontal screws and the adjustment screws on the two sides of the piezo, bolt the actuaor+extruder stack with the base, ensuring the piezo remains in it's spot and is depressed by the convex pin of the upper part. Don't over-tighten the adjustment screws, but don't leave it loose as well - there should not be any wobbling! It is critical to tight things well here but still have it sensitive enough. If it is not tighten enough, you may start seeing inconsistent results - if you experience varying first layer results, that may be the reason - try tightening a little bit more.
- screw the pp20 pcb and connect it with the piezo (pin coming from ceramics go to the lower pin of the pp20 two pin header).
- Mount the entire assembly (base-actuator-extruder) to the the x-carriage with the original 4 pins and the screw from behind, tune the pp20 PCB if needed (consult the manual) and test - should trigger with a bare finger touch on the hotent
The design may have flows - I am a lame designer :). Sharing the project here for you to edit/fix: https://www.tinkercad.com/things/j58bZaWPPw4
(PS All credits for the idea should go to coredump777 - thing:2616720)