Move on extents

FiliP
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03 Jul 2015 02:39 #60355 by FiliP

Move on extents was created by FiliP

Hi.
I have 3axis home made mill. I want to do something like this, first 5 seconds:

Auto move around work area, "drawing" rectangle on fixed Z level.

I have no idea how to get this moves on demand (form glade button/subroutine).
Can anyone show me the way? :dry:

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kornphlake79
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03 Jul 2015 10:16 #60362 by kornphlake79

Replied by kornphlake79 on topic Move on extents

We have several Han's laser etching lasers that will show a "frame preview." The marking software is based on an open source windows based marking software to the best of my knowledge it is only modified for some Han's laser logos. Sintec Optronics and Orotig both use the same software. I know it interfaces with a usb motion controller but after a short search I am not able to find source code for an open source download. I'm not sure how well marking software would work for milling, and it certainly isn't linuxcnc based so it may not fit your needs at all, but it may get you searching in the right direction.

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FiliP
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03 Jul 2015 14:59 #60367 by FiliP

Replied by FiliP on topic Move on extents

Thx.
I was searching answers on this page but get nothing.
linuxcnc.org/docs/html/gcode/overview.html

Becouse not all CAM programs have this functionality i'd like to do this using LinuxCNC.
Maybe some one else got any idea?

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ArcEye
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03 Jul 2015 14:59 #60368 by ArcEye

Replied by ArcEye on topic Move on extents

The answer would be to write a program that parses the gcode file, finds the largest positive and negative X and Y values and makes a rectangle from them.

The question is what is the point of it?

I can only assume you do everything in CAD and CAM and have no idea what the gcode files contain?

regards

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FiliP
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03 Jul 2015 15:19 #60369 by FiliP

Replied by FiliP on topic Move on extents

That's right.I do not always have access to the files CAM / CAD.

What is this for? Mainly to quickly verify the correct alignment of the material to be treated, and i don't always use a material with a symmetrical shape.
I was expecting the maximum dimensions that appear in the graphics window LinuxCNC are somewhere stored in a variable ...

It remains for me to always manually rewriting maximum and run code in MIDI or subroutine.

Thank you for trying to help.

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ArcEye
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03 Jul 2015 17:30 #60374 by ArcEye

Replied by ArcEye on topic Move on extents

You can access the max extents from the File > Properties dialog.

I will look later to see where Axis gets them from, but whether they are available as an externally accessible variable is dubious.

regards

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andypugh
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03 Jul 2015 17:55 #60376 by andypugh

Replied by andypugh on topic Move on extents

One solution might be to set up a filter file which simply looks through the G-code for max and min X and Y values and stores them in global G-code paramters. Then a button-press can call a simple G-code sub to use these values.

LinuxCNC has the option to run the filter process whenever a G-code file is opened:
www.linuxcnc.org/docs/html/config/ini_co...l#sub:FILTER-Section

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ArcEye
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03 Jul 2015 19:06 - 03 Jul 2015 22:54 #60378 by ArcEye

Replied by ArcEye on topic Move on extents

Axis gets the extents from canon.

If you created axisui pins, say axisui.x-max-extent, axisui.x-min-extent etc, you cou copy these values to those pins and make them accessible, both though hal and directly in gcode through the #<_hal[xxxx]> mechanism

Line 1791 onwards (master)

            min_extents = from_internal_units(o.canon.min_extents, conv)
            max_extents = from_internal_units(o.canon.max_extents, conv)
            for (i, c) in enumerate("xyz"):
                a = min_extents[i]
                b = max_extents[i]
                if a != b:
                    props[c] = _("%(a)f to %(b)f = %(diff)f %(units)s").replace("%f", fmt) % {'a': a, 'b': b, 'diff': b-a, 'units': units}
        properties(root_window, _("G-Code Properties"), property_names, props)

Last edit: 03 Jul 2015 22:54 by ArcEye.

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ArcEye
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03 Jul 2015 20:13 - 03 Jul 2015 23:21 #60381 by ArcEye

Replied by ArcEye on topic Move on extents

comme ca

Last edit: 03 Jul 2015 23:21 by ArcEye.

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ArcEye
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03 Jul 2015 22:52 #60385 by ArcEye

Replied by ArcEye on topic Move on extents

and how to access the values in gcode

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Move on extents

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