Halsampler tools

I've been working on tuning a new CNC mill and learning Linuxcnc while I go. I like using halscope but I'm too disorganized - I don't keep good notes and can't remember what a given change did.

So I wrote some tools that let me use halsampler rather than halscope. The tools let you set up some hal changes, call halcmd to make the changes, call halcmd to log interesting parameters and put it in a database. The automatically created halsampler log file is logged in the db too. A couple of other tools let you plot the data and retrieve database entries.

There's a github at github.com/rgbond/sampler_tools

Bob Bond

I just updated the files on github. I had done some command renaming and grabbed an old set of files. Sorry if anyone wasted time on those.

Hi rgb,

Just a tip. If you add some application picture's here and at github, there is more interest for your work !

rgb.
looks really interesting.
I'm trying to tune a DC servo system and need to 'sample' several of the pins.
How does one install and run your code?
and as Grotius states, a couple of images, with explanations would really help.
thanks.

Thanks for the comments.

I added some more information to the github README.md and added a screenshot of the plot of some data that I captured. The tools are command line tools so just same them in a directory somewhere. They depend on Python3 and the Python3 versions of sqlite3 and matplotlib. These can be installed via:
sudo apt-get install python3-matplotlib libsqlite3-0

This is fantastic, works wonderfully! Thank you rgb for sharing. I have 2 suggestions for improvements.

1. Make plot_hs so if no fields are specified, then all signals are plotted.

2. Add function to plot 2d (x/y instead of time). This could be used to view a plot of x axis position and y axis position so one can see the desired tool path vs the actual.

Hi Turbostew,

Thanks for the suggestions. Both look like good additions to the code. I'll give it a try. I'll post back here when I have updated the code on github.

Bob Bond

I added the changes you suggested. Let me know if they work for you.

Thanks,
Bob

Hey rgb,

I did mess with your plot file. I added some features to plot x-y and to add sample delay to fields. Sample delay is needed to delay the command one sample so it aligns with feedback. This is how pid error is calculated. PM me and I will send you my file to do with it as you wish.

It looks like direct messages have been turned off. Maybe send the changes as a pull request on a github branch?