How many passes for accurate cut?


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Thread: How many passes for accurate cut?

  1. #1
    Registered chronomill's Avatar
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    Default How many passes for accurate cut?

    Hello,

    I think I'm missing something. I've been cutting MDF and abs with success but I have difficulty getting accurate cuts in only one pass. If I run my code three times I get somewhere close to the correct distance.

    For example, a 9mm hole will come out at 8.6mm at the first pass and end up at 8.95mm after the third or fourth pass. I need to mention that what I call a pass actually is three times going around the hole circumference.

    Could that be an end mill issue, I'm using some Chinese end mill? Machine is functioning properly and calibrated properly.

    Sent from my Nexus 5X using Tapatalk

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  2. #2
    Member ger21's Avatar
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    Default Re: How many passes for accurate cut?

    Sounds like a machine rigidity issue.What kind of machine is this?

    Gerry

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  3. #3
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    Default Re: How many passes for accurate cut?

    Quote Originally Posted by ger21 View Post
    What kind of machine is this?
    Chinese CNC 3040 with 800W spindle.



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    Default Re: How many passes for accurate cut?

    yep thats it. Add finish passes in your CAM. The larger end mill will also help, hopefully. Reduce your bore stepdown as well

    Luthier/Woodworker/Machinist in NS, Canada.


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How many passes for accurate cut?

How many passes for accurate cut?