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IndustryArena Forum > CAM Software > Uncategorised CAM Discussion > GrblGru: Free CAM and 3D-Simulation for mills and lathes
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  1. #241
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    Join Date
    Jun 2007
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    14

    Re: GrblGru: Free CAM and 3D-Simulation for mills and lathes

    Hi GrblGru,

    Another bug appears in current version 3.43.10
    You have to check other machine styles and tool position has bugs.
    See attached capture.

    Armando

  2. #242
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    May 2016
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    132

    Re: GrblGru: Free CAM and 3D-Simulation for mills and lathes

    @Lester444
    This is a very interesting machine !
    To get the model running in GrblGru, I would have to find a solution for the two 'tools' ( probes ).
    At the moment there is only one tool and the whole calculation refers to it.
    What exactly do you want to do with the machine ? Do you want to measure PCBs ? Which coordinates should the probes move to?
    Is there a DXF file ?

    @Armando
    Hey Armando, this is not a bug, it's a feature.

    The rotary axis can now be positioned arbitrarily in the XY plane by the user.
    Try to change the values in the MachineManager once and then press the 'Accept data' button. (see pic)

    But of course you are right. I will check the values for the next release version again.
    Thank's for your feedback.


  3. #243
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    May 2016
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    132

    Re: GrblGru: Free CAM and 3D-Simulation for mills and lathes

    Release notes V3.44.0

    The possibility to control a rotation axis with the Mega-5X software caused me to rework the necessary functions for the projection of DXF or SVG drawings.
    For example, it is now possible to position and orient the rotation axis in the XY plane without having to change the 3D model.
    In addition to normal cylinders, any shaped rotation-symmetrical workpieces can now be engraved.

    I am of the opinion that a rotary axis is a real enrichment for a 3-axis control, which extends the production spectrum enormously.
    For this reason I can only recommend this extension. Especially if you have the possibility to build your own axis.

    The video shows the necessary process from the scanning of the workpiece, over the creation of the job, up to the milling.
    But there are also examples how to mount a rotary axis on machines like LowRider or the MpCNC.

    The new version now also contains screen texts in Italian.

    Have fun with GrblGru


  4. #244
    Registered
    Join Date
    Feb 2004
    Posts
    21

    Re: GrblGru: Free CAM and 3D-Simulation for mills and lathes

    Hi GrblGRU:

    I have been playing with the software, and I like it very much. Thanks for creating it, and for making it available.

    I'm using it as a CAM program for my lathe.

    I am having one problem that I can't seem to solve.

    When I import a dxf profile, and tell GrblGRU that the stock diameter is 22mm, the Z axis moves forward in X to 11mm forward of the actual spindle axis of the part/machine.

    Click image for larger version. 

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    Then when I post G-code, it starts at X-0 at the outside diameter of the 22mm stock, and cuts into the stock using negative X values.

    This means I need to zero the X axis at the OD of the stock, but I think it is more usual to have X-0 be at the actual rotation axis of the spindle. But I'm darned if I can figure out how to make that happen...

    Am I missing something? Is there a way to have the stock diameter specified, and NOT have the X-0 point move to the OD of the stock?
    Andy

  5. #245
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    May 2016
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    132

    Re: GrblGru: Free CAM and 3D-Simulation for mills and lathes

    No, you did everything right. In the current version, X=0 is always set to the outer diameter. You can't change that.
    To be honest, I haven't thought about it yet, that it would work also the other way.
    The reason for this is that I mostly work with wood. I clamp the workpiece and turn it a few tenths cylindrically.
    Then I am sure that the runout is ok. Then I measure the part with the caliper and enter the radius in the input 'Stock Radius' and start the program.

    I don't see any disadvantage in this procedure at the moment. But I am also open for other ideas.
    If you can tell me the advantages of your method, I will think about it again and change it if necessary.

  6. #246

    Join Date
    Sep 2019
    Posts
    6

    Re: GrblGru: Free CAM and 3D-Simulation for mills and lathes

    Hallo GrblGru,

    Ran into a weird bug, both with the v3.42 and v3.44, on two diffent pc's (windows 7 and 10).
    Basically I can't get the NC creator button to work.
    On older video's on your channel it gives you a popup windows where you can adjust the parameters for roughing and finishing.
    However, when I click the button nothing happens.

    It's still possible to create code, but I have to go into the 2D workspace, right-click Drawings>zeichnung>Toolpath1 and then select Create Job>[...]
    Then a job get's added to the job list, which I can then open and adjust the parameters.


    ....

    The 4th axis functionality looks awesome! I wanted a way to control the 3 axis of the lathe (carriage and tailstock), and a way to turn the chuck.
    Seems like you could mindread and made it possible :P

  7. #247
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    May 2016
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    132

    Re: GrblGru: Free CAM and 3D-Simulation for mills and lathes

    Sorry, I changed that a while ago.
    The operation of the lathe is now the same as that of the milling machine. This makes it easier for me to maintain the program.
    This also makes it a little more convenient for the user.
    Once you have created a job on the 2D side, this job will be created automatically whenever you load a DXF file by drag&drop together with the SHIFT key.

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