bCNC.. Am I missing something very basic?

Hi,
tl;dr:
Where is all the documentation for bCNC? (I know about this one: https://github.com/vlachoudis/bCNC/wiki)

Long version:
Hi, I’m two days into my first cnc experience after rebuilding an old 3D-printer to something that is going to become a pcb-mill. My current setup is grbl on a makerbase board and I’ve installed bCNC on my Mac. I’ve semi-successfully drawn a circle with a pen, so the setup is pretty much working. My big problem so far has been the intense lack of documentation. So much so that I really think that I have been searching for the wrong things or just plainly suck at googling. I cannot find any documentation for the majority of buttons and functions, and it’s giving me a diagnosis. One example is the probe tab which is attached below. WHAT DOES IT ALL MEAN? (read dramatically). I have studied this page (https://github.com/vlachoudis/bCNC/wiki) like an overly conscientious munk, but to no avail. My last hope is therefore seeking the knowledge that lies deep within the forums of the legendary Makers.

Your help will be rewarded with Internet points of your chosen currency.

Doubt you are going to find about magic documentation that hasn’t been added to the official wiki… :stuck_out_tongue:

If you ask specific questions here about what things mean, though, you might get answers to your specific questions and be in a position to help improve the bCNC wiki!

Ok, so at least I’ve not missed anything very obvious… Here are a number of questions from the tab I mentioned. I’m both interested in the answers themselves as well as where to find the information. If I find a good source, I will definitely do some suggestions to the wiki!

1: Whats the difference between “fast probe feed” and “probe feed” and when are they used?
2: What is TLO?
3: What does the different alternatives in the “probe command” drop down do?
4: What does everything in the “record” section do/mean?
5:How does the “probe” section work? What is a probe cycle?
6: How does “center” work? I’m guessing it’s about finding the center of a hole, but what happens when you press the center button? I don’t want to risk breaking anything by blindly experimenting…
7:What does everything in the “orient” section mean/do?

I could probably ask the same questions for the other tabs as well, but this is what I am working on at the moment. Again, I am serious about contributing to the wiki, and being a total noob, I think I can help make it more accessible for beginners.

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Just to be clear, as far as I know no bCNC maintainer is here on MakerForums. So we can talk about it here, but it’s not necessarily truth… I’ve never used bCNC myself, and doing a search for bCNC on MakerForums doesn’t show a lot of posts since early 2019 when we imported history from Google+; all the older history is from Google+.

TLO is “tool length offset” and this is at https://github.com/vlachoudis/bCNC/wiki/AutoLevel on the wiki you linked to.

Typically fast probe is a first pass to get an approximate measurement quickly, then pull back and probe again more slowly for greater accuracy.

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I’ve used bCNC quiet a lot, but I cant answer all of your questions.

I can tell you this though. I use the probe function, and all I do is connect the probe to the spindle, and put a value in the third “pos” box in the probe group. If you hover the mouse over, it will tell you that is the Z axis.

The value you enter is the max you want z to try before giving up.

I usually drop my Z so its about 10mm from the probe and put a value of -10.

Click probe, and it should gently work its way down.

If its the first time you are doing it, touch your probe base plate to the bit , and see if you stop.

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Thank you:) Could you have a look at the other answers as well? I will implement everything in the wiki!

The reason I cant answer all of your questions is because the probe functionality I described is all I know about it.