pyVCP m5i20 HOSTMOT-4 test panel

For testing the servo-drives and all the electronics I found this test-panel for the HOSTMOT-4 conifiguration of the m5i20 quite useful.

It uses an XML file (iotest.xml) to define the pyVCP panel layout, and then a HAL file (pyiotest.hal) to hook up the IO pins of the m5i20 to the panel. I'm also using a shell script ( to start the realtime environment and run pyvcp followed by the HAL file automatically.

Compare this to my earler effort with the old VCP. Now with many more widgets in pyVCP I have better control of the DACs etc.

8 thoughts on “pyVCP m5i20 HOSTMOT-4 test panel”

  1. Hi Tom P,

    Yes, these scripts and the image are hereby released under the GPL, and you may add them to the EMC wiki if you want.


  2. Hi Anders,
    Nice web page!
    I am trying to expand my Axis interface and came to a problem which you can solve maybe:
    Is there a possibility to set the maximum value of a pyVCP scale from outside via a signal from HAL or a parameter?
    Another question: when I open your tarball I find another tar file inside that my Archive manager cannot process (on LinuxMint 19).

    I would be glad if you could help,

    1. Hello JC,
      I don't think there was a maximum-value input for a pyVCP scale originally - but things may have changed.
      The best place to ask is the linuxcnc forum I think
      If you need to write a custom pyVCP widget it should not be that hard..

      I don't think you need the tar.gz file (it may be broken on the linuxcnc wiki). The hal-file, xml-file, and optionally the sh-file to run it all is what is needed.

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