Piezoelectric disks for Z contact detect and bed levelling March 04, 2016 05:34AM |
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Re: Piezoelectric disks for Z contact detect and bed levelling March 04, 2016 06:59AM |
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Re: Piezoelectric disks for Z contact detect and bed levelling March 04, 2016 07:31AM |
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Re: Piezoelectric disks for Z contact detect and bed levelling March 04, 2016 08:35AM |
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Re: Piezoelectric disks for Z contact detect and bed levelling March 04, 2016 09:22AM |
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Re: Piezoelectric disks for Z contact detect and bed levelling March 08, 2016 07:56AM |
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Re: Piezoelectric disks for Z contact detect and bed levelling March 08, 2016 08:14AM |
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Re: Piezoelectric disks for Z contact detect and bed levelling March 08, 2016 08:29AM |
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Re: Piezoelectric disks for Z contact detect and bed levelling March 09, 2016 04:19AM |
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Re: Piezoelectric disks for Z contact detect and bed levelling March 09, 2016 06:39AM |
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Re: Piezoelectric disks for Z contact detect and bed levelling March 09, 2016 07:14AM |
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Re: Piezoelectric disks for Z contact detect and bed levelling March 09, 2016 07:50AM |
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Re: Piezoelectric disks for Z contact detect and bed levelling March 09, 2016 08:31AM |
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Re: Piezoelectric disks for Z contact detect and bed levelling March 10, 2016 07:54AM |
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Re: Piezoelectric disks for Z contact detect and bed levelling March 10, 2016 08:05AM |
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Re: Piezoelectric disks for Z contact detect and bed levelling March 10, 2016 08:28AM |
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Re: Piezoelectric disks for Z contact detect and bed levelling March 10, 2016 08:56AM |
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Re: Piezoelectric disks for Z contact detect and bed levelling March 10, 2016 09:15AM |
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Re: Piezoelectric disks for Z contact detect and bed levelling March 11, 2016 12:03PM |
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Re: Piezoelectric disks for Z contact detect and bed levelling March 11, 2016 12:42PM |
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Re: Piezoelectric disks for Z contact detect and bed levelling March 11, 2016 12:56PM |
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Quote
Moriquendi
I've been following this thread with interest, finding an accurate z-probe has been bothering me for as long as I've had my printer.
I've been playing with some 20mm piezo transducers and I think you might get a cleaner response by flexing the disk rather than squeezing it. I tried mounting my transducers over a hole so they were only supported by the edge and pressing on the centre and got a much sharper response than by putting them directly on a flat plane and squeezing. Unfortunately I don't have a DSO so I can't quantify my readings.
I need to gather some parts to build a sensor conditioning circuit then I'll be integrating these into my kossel mini.
Moriquendi
Re: Piezoelectric disks for Z contact detect and bed levelling March 11, 2016 01:54PM |
Registered: 9 years ago Posts: 487 |
Quote
JamesK
Interesting - that's certainly worth experimenting wtih. How did you observe the response without a scope?
Re: Piezoelectric disks for Z contact detect and bed levelling March 11, 2016 02:02PM |
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Re: Piezoelectric disks for Z contact detect and bed levelling March 11, 2016 02:21PM |
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Re: Piezoelectric disks for Z contact detect and bed levelling March 11, 2016 02:54PM |
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Quote
leadinglights
@Moriquendi. Higher frequency noise from the motors is damped by the amplifier filter cutoff and problems are almost purely with movement noise from the X and Y carriages. There are a bunch of false triggers at the end of each X or Y travel and even more if both X and Y are active. I am fairly sure that just reducing the sensitivity a bit (a mosquito cough will trigger it at the moment) and by introducing a delay between the end of X or Y travel and the downward Z movement all should be well.
Mike
Re: Piezoelectric disks for Z contact detect and bed levelling March 18, 2016 11:07AM |
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Quote
Moriquendi
....
This is what bothers me, any (ok, any sensible movement) movement on a delta requires moving three axis, tuning that out has been a headache in the past. I'm assuming that the false triggers are a mechanical (vibration) issue rather than an electrical interference one?
.....
Moriquendi
Re: Piezoelectric disks for Z contact detect and bed levelling March 18, 2016 11:46AM |
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Re: Piezoelectric disks for Z contact detect and bed levelling March 18, 2016 12:03PM |
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Re: Piezoelectric disks for Z contact detect and bed levelling March 18, 2016 12:06PM |
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Re: Piezoelectric disks for Z contact detect and bed levelling March 18, 2016 02:04PM |
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