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Radius compensation fails.

Question asked by Ingolf Tippner on Feb 5, 2020
Latest reply on Feb 6, 2020 by Ingolf Tippner

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Hello.

I created a simple part with a rectangulat inner pocket with corner radius of 5mm.

I configured the machine (Kitamura) and the tool changer and tools.
I have 2 tools, one 2mm drill and a 6mm endmill.

The roughing process works fine (dont use the G41).
The countour finish process uses G41 with leadin/leadout. This fails.

I will explain.

N0535 Z25.
N0536 X39.27 Y10.382
N0537 Z1.
N0538 G01 Z-5. F685.8
N0539 G41 X41.476 Y8.176 F2057.4 (My machine controller no needs the D-Parameter!)
N0540 G03 X41.9 Y8. I41.9 J8.6 (absolute center coords!)
N0541 G01 X75. F2743.2

The contour is on Y=5mm. So, the leadin goes wrong and all corrdinates after G41 are not contour coordinates.
They are compensated coordinates.

How must I change this setting? I will use G41/G42.

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6 Replies

Michael Buchli Feb 5, 2020 9:35 AM
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Ingolf,

for your machine, you will need to have the post-processor changed or created to output the correct syntax for your version of controller. You can reach out to our reseller, or look for posts from other vars like HawkRidge who have them posted for free to download. You can also create your own post-processor using the UPG which is a free download from the CAMWorks website. YouTube has some videos showing you how to use the UPG. Please search for Universal Post Processor in Youtube for instructions.

Mike
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Ingolf Tippner Feb 5, 2020 10:12 AM
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Hello Mike,
I´ve downloaded the UPG and adapted the PP. This works fine. My controller is Beamicon2, it´s a new industrial controller (our own concept).

The code from the first post is the output of the PP.
The problem is, that Solidworks Cam gives "compensated" coordinates to the PP.

If I take out the G41 in the PP it works, but this is not the goal :-)
After a LeadIn Move the Solidworks Cam should produce non compensated coordinates. That means, the coordinates should be the coordinates from the contour, not precompensated by the CAM Module.

I think, its a misstake/wrong setting in the strategy or whatever :-), but no problem with the PP.
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- Craig Serkanic @ Ingolf Tippner on Feb 5, 2020 11:28 AM
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  Ingolf, try this. CWCAM and CAMWorks default is tool path center "With compensation"
  
  Also make try checking this. Depends on how you like to see your toolpath
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  - Ingolf Tippner @ Craig Serkanic on Feb 5, 2020 12:54 PM
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    Dear Craig,
    Many thanks! This works. The option "Add Tool Dias to Leadin" ,must be also set.
    Now the leadIn works as expected and the toolpath comes correct.
    
    But now I have a new problem: I have a collision in the compensation, that means, the tool path cuts itself.
    This happens, if the inner corner radius igual to the tool radius.
    I.e. a rectangular pocket with corner radius 5mm and a tool 10mm. This runs in a problem generating the compensation.
    No error-messages during creating the nc file or path, only in the machine control was detected.
    
    Changing to a tool with a smaller diameter works fine.
    This should not happens :-)
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    - Craig Serkanic @ Ingolf Tippner on Feb 5, 2020 2:12 PM
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      In the same pic above check Sharp Corner.
      
      I would encourage you to also hit the help button on that page. It has a wealth of information about that page and any page you might be on.
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      - Ingolf Tippner @ Craig Serkanic on Feb 6, 2020 5:40 AM
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        Hello Craig,
        >>In the same pic above check Sharp Corner.
        Many thanks - now it´s working.
        I will open a new thread for some other things: The G-Code is very stupid. I marked "use subroutines" but its all straight code, no loops, no subcalls... very long codelist for the same path (pocket i.e.). The old Solidworks Cam (2006) has build better code.
        
        >>I would encourage you to also hit the help button on that page
        This is the next problem. During the install I´ve choosen "german" and he installed the language package. But now the system is spanish (I live in Spain, but the OS is german). I can switch mostly to english (I´ve done so), but this mixture of spanglish don´t really help me.
        I will have the system in my motherlanguage, german :-)
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Radius compensation fails.

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