python hal interface

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29 Mar 2024 22:18 #297153 by MarkoPolo
I have this problem.
In the python script I want to set the signal value like this
"hal.set_s("lenght_tool", value)" but it doesn't work.

The pin value setting works in the same file
"hal.set_p("ini.z.min_limit", val)" , but hal.set_s doesn't work.

I dealt with this problem this way:
cmd = ("halcmd sets length_tool " + tool)
subprocess.check_output(cmd, shell = True)
, but if possible I would prefer to avoid subprocess.

2. The second question is how to set the z-axis offset from the python script.
I need to make a macro that, after measuring the tool, will position g53 z0 in the A-axis rotation axis, as in the screenshot. ?

Marek
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30 Mar 2024 07:30 #297198 by cmorley
Replied by cmorley on topic python hal interface
There is no set_s command. It was never added.
If you remove the signal, can you just set the bare pin?

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30 Mar 2024 18:37 #297225 by MarkoPolo
Replied by MarkoPolo on topic python hal interface
I used signal because I can't create a new pin to be able to read and change its value. How is it done? , but I'm more concerned about problem number 2.
How to set the Z axis offset from the script.
Where are the offset values stored? In halcmd show no pin displays these values.

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31 Mar 2024 00:24 #297251 by cmorley
Replied by cmorley on topic python hal interface
I meant just set the pin directly with no signal or other pin connected.
If you mean set the origin for Z then you must use the linuxcnc python module to call an MDI command.

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31 Mar 2024 12:02 #297273 by MarkoPolo
Replied by MarkoPolo on topic python hal interface
I have no problem calling the MDI command from a python script.
I need to do exactly as in the screenshot, only from the script.
I don't know if I need to change the value of some pin or signal, or something else.
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31 Mar 2024 12:59 #297278 by Aciera
Replied by Aciera on topic python hal interface
To set the G54 offset values from MDI try:

G10 L2 P1 Z-23

To set the currently active offset value from MDI try:

G10 L2 P0 Z-23
The following user(s) said Thank You: MarkoPolo

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31 Mar 2024 13:16 #297280 by MarkoPolo
Replied by MarkoPolo on topic python hal interface
Just what I needed, it works. Thanks
I still don't know the gcodes very well.
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