Homing signal processing

hello

I apologize for not being able to reply to db1981, andypugh's post.

I've read the manual many times over the last few days for a solution to this problem. So I found a way to add a phthon program to do what I want in the HAL.
And for the time being, I made Homing possible, so I decided to report it.

The python program is a simple content, just referring to the sample in the manual.

python========================================
#!/usr/bin/env python
import hal
h=hal.component("toggle2index")

h.newpin("in",hal.HAL_BIT,hal.HAL_IN)
h.newpin("index",hal.HAL_BIT,hal.HAL_IO)

h.ready()
ib=0

while 1 :

    if ib != h :
        ib = h
        if h.index == 1:
            h.index = 0
python========================================

Make this available in HAL

HAL============================================

net ys4-home-sw joint.3.home-sw-in lcec.0.1.din-2-not
net findEdge1 <= lcec.0.3.TouchProbeStatus-7
net findEdge1 => toggle2index.in
net findEdge2  toggle2index.index <=> joint.3.index-enable

HAL============================================

It is confirmed that HomeSwitch is added and Homing is performed.
I would like to investigate how accurate it is.

I'm not a programmer who can maintain LinuxCNC. Also, I'm not particularly knowledgeable about building systems. Therefore, it would be very helpful to get the opinions and advice of those who have a lot of knowledge.

Thank you very much.


 

andypugh, thanks for the great advice.
I plan to try it as my next attempt.

However, I also found a problem. index-enable is usually connected to the Encoder module, and the Encoder's Position is also reset. Since the Ethercat servo drive side is not reset, the coordinates are not updated correctly even if the origin return is performed. I would like to support this as well.

You probably should look at how Dominc manages homing for ci402 devices in his component via read and write functions
github.com/dbraun1981/hal-cia402

But I could not get it to work so its crying out for a custom homemod component.

rodw, thanks for the new info. ,

For people who are not good at English, it may be a bit difficult to jump from this forum to other sites. I would like to try to understand. I'm not a LIinuxCNC programmer, so I don't know how to use github. Even with the README.md explanation, I'm not sure if it really does what I want.

For the time being, I would like to scrutinize the information you have given me and think about it.

Thanks.

You don't need to do much.
Linuxcnc's instructions are also helpful (Heading 1.1)
linuxcnc.org/docs/devel/html/code/building-linuxcnc.html
You will need to install the linuxcnc-uspace-dev.deb to install halcompile if you have not built linuxcnc from source for a run in place install.
So I would then do something like
So over time you may build several pieces of software so we will keep all of our source for these in the ~/dev folder...

Then you will have the component installed and you can use Dominic's samples.

So if dominc changes his code, to update the software, you just need to enter the ~/dev/hal-cia402 folder and type:

Finally, if you do decide to clone linuxcnc, that will default to master branch (V 2.10)
If you decide you want to use the 2.9 branch instead you just need to enter the linuxcnc-dev/src folder and type
That changes ths source code in the src folder to be the 2.9 branch then you proceed to make te software.

SO basically thats all you need to know.