Re: Precision Piezo Z-probe Now available. February 22, 2018 03:20PM |
Registered: 8 years ago Posts: 3,525 |
Re: Precision Piezo Z-probe Now available. February 22, 2018 03:31PM |
Registered: 9 years ago Posts: 465 |
Re: Precision Piezo Z-probe Now available. February 23, 2018 04:40PM |
Registered: 9 years ago Posts: 465 |
Re: Precision Piezo Z-probe Now available. February 23, 2018 04:51PM |
Registered: 8 years ago Posts: 3,525 |
Re: Precision Piezo Z-probe Now available. February 23, 2018 05:03PM |
Registered: 6 years ago Posts: 4 |
Quote
Moriquendi
Hi Phil,
It would appear that you've found an issue with the PP20 and the MKSbase, 3.1v should register as a logic high but perhaps there's more hysteresis on that pin or some form of protection that's interfering. I haven't used an MKSbase but I have been using a Smoothieboard for a couple of years and it doesn't have this issue.
Idris
Re: Precision Piezo Z-probe Now available. February 23, 2018 11:49PM |
Registered: 9 years ago Posts: 7 |
Re: Precision Piezo Z-probe Now available. February 24, 2018 02:37AM |
Registered: 8 years ago Posts: 3,525 |
Re: Precision Piezo Z-probe Now available. February 24, 2018 04:12AM |
Registered: 6 years ago Posts: 5 |
Re: Precision Piezo Z-probe Now available. February 24, 2018 04:43AM |
Registered: 9 years ago Posts: 487 |
Re: Precision Piezo Z-probe Now available. February 24, 2018 07:19AM |
Registered: 8 years ago Posts: 3,525 |
Quote
diego.trinciarelli
Hello DjDemon,
so your test actually works (as the board), by just unplugging the green connection i get the proper behavior.
I found out it was bad wiring, one diagram i had of the board indicated the wrong orientation of the pins, so i was inverting +5v and TRG. Using the multimeter i was able to figure out the right polarity.
Now i will try to configure Marlin and see what happens
Re: Precision Piezo Z-probe Now available. February 24, 2018 07:33AM |
Registered: 9 years ago Posts: 487 |
Re: Precision Piezo Z-probe Now available. February 24, 2018 03:13PM |
Registered: 9 years ago Posts: 7 |
Quote
DjDemonD
Thanks for doing the video. Can you try one thing out, can you video pushing (not tapping) upwards, then holding a little pressure on then releasing it?
If it triggers as you push up its okay, if it triggers as you release then the piezo disc is reverse polarity. Flip the plug over on the piezo disc. Sometimes you have to retune vr2 then try again.
If it's correct polarity then it's a case of getting the sensitivity right, and ensuring you are using pause before probing of at least 400ms but you can use more delay.
It looks like a corexy so upwards movement of the z axis should NOT usually cause too much mechanical noise and false triggers.
Re: Precision Piezo Z-probe Now available. February 24, 2018 03:19PM |
Registered: 6 years ago Posts: 5 |
Re: Precision Piezo Z-probe Now available. February 24, 2018 03:30PM |
Registered: 6 years ago Posts: 5 |
Re: Precision Piezo Z-probe Now available. February 24, 2018 03:59PM |
Registered: 8 years ago Posts: 3,525 |
Re: Precision Piezo Z-probe Now available. February 24, 2018 04:03PM |
Registered: 6 years ago Posts: 54 |
Re: Precision Piezo Z-probe Now available. February 24, 2018 04:22PM |
Registered: 6 years ago Posts: 35 |
Re: Precision Piezo Z-probe Now available. February 24, 2018 04:31PM |
Registered: 8 years ago Posts: 3,525 |
Re: Precision Piezo Z-probe Now available. February 24, 2018 04:32PM |
Registered: 9 years ago Posts: 487 |
Re: Precision Piezo Z-probe Now available. February 25, 2018 02:58AM |
Registered: 8 years ago Posts: 5,232 |
Re: Precision Piezo Z-probe Now available. February 25, 2018 03:17AM |
Registered: 10 years ago Posts: 14,672 |
Re: Precision Piezo Z-probe Now available. February 25, 2018 04:37AM |
Registered: 8 years ago Posts: 3,525 |
Re: Precision Piezo Z-probe Now available. February 25, 2018 07:08AM |
Registered: 8 years ago Posts: 5,232 |
Re: Precision Piezo Z-probe Now available. February 25, 2018 07:46AM |
Registered: 8 years ago Posts: 3,525 |
Re: Precision Piezo Z-probe Now available. February 25, 2018 09:08AM |
Registered: 6 years ago Posts: 54 |
Re: Precision Piezo Z-probe Now available. February 25, 2018 11:42AM |
Registered: 6 years ago Posts: 1,007 |
Quote
Moriquendi
[attachment 102878 V2.11schem.jpg]Schematic for the v2 boards is here, I could have sworn I posted it on our website somewhere but obviously not.
Re: Precision Piezo Z-probe Now available. February 25, 2018 11:53AM |
Registered: 6 years ago Posts: 1,007 |
Quote
o_lampe
Quote
DJ
I wonder if we can design a polarity independent circuit.
I think, that's called "precision rectifier", an op-amp circuit that rectifies the signal without diode voltage losses.
Wikipedia
Re: Precision Piezo Z-probe Now available. February 25, 2018 12:33PM |
Registered: 8 years ago Posts: 3,525 |
Re: Precision Piezo Z-probe Now available. February 25, 2018 01:08PM |
Registered: 6 years ago Posts: 1,007 |
Quote
DjDemonD
Good idea definitely worth considering. Depends if we go to a microprocessor or stick with analogue. It's worth thinking about as most issues are reverse polarity rather than anything more complicated.
Re: Precision Piezo Z-probe Now available. February 25, 2018 01:32PM |
Registered: 9 years ago Posts: 487 |