I have just put up a page on the RepRap Wiki and am looking for review, correction, or addition as normal for a Wiki. The page is at. [reprap.org] This is similar to other pages in the Wiki and may need to be amalgamated, but there has been quite a lot of change since those were written

This is not complete as I am still trying to come up with a concise and accurate description of several types of probes. Particular areas where my knowledge is somewhat lacking are the following:

How does sensorless probing work? Are steps missed when the probe meets the bed or just microsteps? If neither steps nor microsteps, what physical effect is being measured?

Is there anything useful that can be said about solenoid probes (BLTouch etc.) other than that they work but need X, Y, and Z offsets?

How does the differential part of differential IR probes work?

Are there any descriptions or drawings that convey concisely and correctly how a Voron Tap nozzle contact probe works? (Not just Oh! it just lifts and works a switch or maybe a Hall Effect sensor depending)

Besides sensorless probing and the Voron Tap, are there any other major omissions? I know of some minor ones such as transducer touch probes (piezo, LVDT, and digital vernier)

Also in need of inclusion are references and pointers to Github pages etc..

Mike

... good work!

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Viktor
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Aufruf zum Projekt "Müll-freie Meere" - [reprap.org] -- Deutsche Facebook-Gruppe - [www.facebook.com]

Call for the project "garbage-free seas" - [reprap.org]

Thank you, VDX, but I am surprised that nobody has any contributions, suggestions, criticisms, style critiques, or unrelated advertising. Not even the mandatory terminology Nazi with disparaging comments about the use of "Bed Leveling" instead of "tramming" has twitched a curtain.

You could almost think the forum was moribund.

Mike

Edited 1 time(s). Last edit at 08/17/2024 12:52PM by leadinglights.

... yes, the forum isn't so active anymore -- but there are some activities around searching (old) information or random hits at google, when some new people find here.

I have to permit some ten new accounts per day and there are some more admins and mods around ...

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Viktor
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Aufruf zum Projekt "Müll-freie Meere" - [reprap.org] -- Deutsche Facebook-Gruppe - [www.facebook.com]

Call for the project "garbage-free seas" - [reprap.org]

A bit of editing on Sensorless probes and Voron Tap (Neither of which I know as I haven't tried them) and some links added to the Wiki page [reprap.org].

Mike

... maybe some sort of "air-pressure-probes" could be interesting too?

It's essentially a tube emitting a weak air-stream and a pressure sensor inside the tube, where the pressure will rise, when the tip is near a surface, which is hindering/blocking the stream.

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Viktor
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Aufruf zum Projekt "Müll-freie Meere" - [reprap.org] -- Deutsche Facebook-Gruppe - [www.facebook.com]

Call for the project "garbage-free seas" - [reprap.org]

Hi Viktor,
I might put a section on the wiki page about methods that have been mentioned in this and other forums. I did some quick trials on a pneumatic back pressure Z sensor back in 2016 but had fallen under the spell of piezoelectric disks so I didn't pursue it.

Another method is similar to the scanning probes, such as eddy current and LiDAR, but using a physical contact probe - much like using the output from a digital dial indicator. I saw this on another forum and immediately thought that an LVDT (linear variable differential transformer) or a capacitor sensor could also be used.

So many good ideas [www.youtube.com]

Mike