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  1. #11
    I'm not sure in what way is a plastic likely to be "off spec" that would cause a surface finish like that, it looks more like a tooling/machine issue.
    You think that's too expensive? You're not a Model Engineer are you? :D

  2. #12
    Well same as anything that needs multiple materials to make a product, add to much of this and not enough of that even down to shelf life.

    Been sent that Plastic from the same place 5 times and 3 of which was crap, the first time used it was like the pic then the next 3 times crap and now decent again.

    Same machine same same tool, same speeds and feeds.

  3. #13
    It's plastic causing the poor finish then, no doubt about it! ;-)
    You think that's too expensive? You're not a Model Engineer are you? :D

  4. #14
    Yeah I've convinced myself the plastics the issue, but the customer is not willing to use another supplier because it's cheap.

  5. #15
    The cause of the finish defect has to be a mechanical one, if it's the plastic then it is somehow deflecting the cutter or machine from the programmed path.
    You think that's too expensive? You're not a Model Engineer are you? :D

  6. #16
    Few weeks ago I made this from 6063 DOC was .5 1.5mm 3 cutter all I had


  7. #17
    6063 makes nice chips which clear easily, you're comparing apples to oranges and that won't help you to work out the source of the problem with soft plastics.
    You think that's too expensive? You're not a Model Engineer are you? :D

  8. #18
    Point here was if machines out or tool deflection, then alloy is harder than the plastic I was cutting

  9. #19
    Quote Originally Posted by Dean jeffery View Post
    Point here was if machines out or tool deflection, then alloy is harder than the plastic I was cutting
    Quote Originally Posted by magicniner View Post
    6063 makes nice chips which clear easily.
    If you don't understand that, your only option is to refuse the job unless he buys materials you like. :D
    You think that's too expensive? You're not a Model Engineer are you? :D

  10. #20
    2mm thick black nylon seems to be hard to find, unless from direct plastics.

    Customers are happy with a shit finish I'm not, and wanted to improve the quality of product.

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