... maybe a bit extreme, but this too is "paste-dinspensing": [attachment 92242 3D-Paste6.jpg] https://reprap.org/forum/read.php?180,757498,757498#msg-757498 Tue, 14 Jul 2026 05:29:29 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?180,757498,817315#msg-817315 https://reprap.org/forum/read.php?180,757498,817315#msg-817315
Do you know what is used in your piezo dispenser? What piezo and what mechanical amplifier?
No chance a light, more crude version could be somewhat affordable?

What solenoid valve does your pneumatic piston use?]]> heinz Paste Extrusion Working Group Wed, 04 Apr 2018 15:47:00 -0400 https://reprap.org/forum/read.php?180,757498,817302#msg-817302 https://reprap.org/forum/read.php?180,757498,817302#msg-817302
The "clamped" bimorph stacks are known as "torque-drive"-actuators - I have a tweezer with this type of PZT-actuator, which can open/close the tweezer with 300µm moving range and frequenzies of some Kilohertz ... but not cheap enough for DIY neither :(

Actually I have another "pulsing" paste-dispenser for testing, where the piston is moved per pneumatic -- some hundred Hertz, end customer price maybe around 1000 €uros ...]]> VDX Paste Extrusion Working Group Wed, 04 Apr 2018 14:11:25 -0400 https://reprap.org/forum/read.php?180,757498,817286#msg-817286 https://reprap.org/forum/read.php?180,757498,817286#msg-817286 I was reading your other posts about your piezo dispenser.

Do you think some form of DIY version is feasible?

This simple bimorph piezo actuator costs 20$:
[www.steminc.com]
Here in action:
[www.youtube.com]

Here is another one with an amplified motion mechanism:
[www.youtube.com]]]> heinz Paste Extrusion Working Group Wed, 04 Apr 2018 12:04:59 -0400 https://reprap.org/forum/read.php?180,757498,773757#msg-773757 https://reprap.org/forum/read.php?180,757498,773757#msg-773757
"CNC-Simply Paste-jetting +UV-curing"

[vimeo.com]

[vimeo.com]

[vimeo.com]


[attachment 95366 Tri_1.jpg]

[attachment 95367 Tri_2.jpg]]]> VDX Paste Extrusion Working Group Sat, 17 Jun 2017 18:34:57 -0400 https://reprap.org/forum/read.php?180,757498,762410#msg-762410 https://reprap.org/forum/read.php?180,757498,762410#msg-762410
Here a video or first testing, showing the complete setup - [vimeo.com]

... another test, a bit of the software too - [vimeo.com]

... and trying the speed limits -[vimeo.com]]]> VDX Paste Extrusion Working Group Fri, 14 Apr 2017 18:48:33 -0400 https://reprap.org/forum/read.php?180,757498,762400#msg-762400 https://reprap.org/forum/read.php?180,757498,762400#msg-762400 The3rdIcon Paste Extrusion Working Group Fri, 14 Apr 2017 18:01:41 -0400 https://reprap.org/forum/read.php?180,757498,757498#msg-757498 https://reprap.org/forum/read.php?180,757498,757498#msg-757498
[attachment 92242 3D-Paste6.jpg]]]> VDX Paste Extrusion Working Group Tue, 21 Mar 2017 19:21:24 -0400