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  1. #1
    Join Date
    Jan 2009
    Posts
    6

    LC 4896 Accuracy Problem

    Hi,
    was wondering if any one can help. when cutting dadoes in plywood, program Has router cut each dado half way in length then cut from other side to meet in the middle. Problem is where they meet in the middle is off.( see exagerated blue line in picture). Any idea of what prob could be..Thanks Ian
    Attached Thumbnails Attached Thumbnails Vent test.jpg  

  2. #2
    Join Date
    Nov 2007
    Posts
    2466
    because it is so perfectly duplicated i would ask how and in what program the file was written?

    a small jog in the vectors - say if you made one and then used array to duplicate would do this.

    jim
    James McGrew CAMaster 508 ATC
    www.mcgrewwoodwork.com http://dropc.am/p/EJaKyl

  3. #3
    Join Date
    Jan 2009
    Posts
    6
    Jim, it was created in v-carve pro. I created a 3/8 by 12 inch vector and then copied it with 3/8 space between. It was cut with a 3/8 2 flute mortise bit at 400 ipm and .210 deep. I'm also having a similar problem in Planit solid when cutting dadoes and thru cutting panels. I'm wondering if it could be problem with machine. Thanks Ian

  4. #4
    Join Date
    Jan 2009
    Posts
    6
    Jim, Thanks for spending the time with me, and resolving this issue. Thanks Ian

  5. #5
    Join Date
    Mar 2003
    Posts
    35494
    What was the resolution?
    Gerry

    UCCNC 2017 Screenset
    http://www.thecncwoodworker.com/2017.html

    Mach3 2010 Screenset
    http://www.thecncwoodworker.com/2010.html

    JointCAM - CNC Dovetails & Box Joints
    http://www.g-forcecnc.com/jointcam.html

    (Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)

  6. #6
    Join Date
    Nov 2007
    Posts
    2466
    he had created a rectangle the width of his bit and when you run a profile inside then it starts the toolpath from both ends and meets in the center.

    i showed him how to create a single vector, array then run toolpath on center

    jim
    James McGrew CAMaster 508 ATC
    www.mcgrewwoodwork.com http://dropc.am/p/EJaKyl

  7. #7
    Join Date
    Mar 2003
    Posts
    35494
    But that doesn't actually fix the original issue, it just avoids it.

    My guess would be machine or tool deflection. By not starting in the center, you don't see it.
    Gerry

    UCCNC 2017 Screenset
    http://www.thecncwoodworker.com/2017.html

    Mach3 2010 Screenset
    http://www.thecncwoodworker.com/2010.html

    JointCAM - CNC Dovetails & Box Joints
    http://www.g-forcecnc.com/jointcam.html

    (Note: The opinions expressed in this post are my own and are not necessarily those of CNCzone and its management)

  8. #8
    Join Date
    Nov 2007
    Posts
    2466
    i was surprised this is how it toolpathed, here is the original and the fix

    jim
    Attached Thumbnails Attached Thumbnails Fullscreen capture 1162010 91252 AM.jpg   Fullscreen capture 1162010 93544 AM.jpg  
    James McGrew CAMaster 508 ATC
    www.mcgrewwoodwork.com http://dropc.am/p/EJaKyl

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