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Sizing Stock the CNC Way

I've learned why CNC machinists start with material thicker than they need and then remove the "hat." It's precise, and a lot faster than milling each side.

Пікірлер: 16

  • @AlmostMachining
    @AlmostMachining3 жыл бұрын

    Awesome approach! Have you considered using the chips for casting, or bulk recycling at the least? I enjoy seeing you take the out of the box approach to productivity. Thank you!

  • @bigbird2100
    @bigbird21003 жыл бұрын

    Great video 👍 John no one likes wasting material but it should be factored into the price of the job,is what you learn.

  • @JohnSL

    @JohnSL

    3 жыл бұрын

    Very true, even when I'm just doing it for me, as a hobby. Not having to mill all the sides makes it more enjoyable.

  • @bigbird2100

    @bigbird2100

    3 жыл бұрын

    @@JohnSL nothing like making chips and ending up with a nice shiny block.

  • @billmccarson5312
    @billmccarson53123 жыл бұрын

    This is called “False bottom”. You could also mill a dovetail on the bottom and hold the workpiece in special dovetail jaws. I do this for multi axis jobs or when the piece has a lot of material removal.

  • @JohnSL

    @JohnSL

    3 жыл бұрын

    Interesting, I never heard that term before. Thanks. Regarding holding, I haven't found the need to go the dovetail route, as my machine is a relatively "small" machine. The maximum recommended end mill is 3/8". But I also have Piranha Jaws that serve the same purpose and don't require any material prep. I have a vise for my 4th axis that also has toothed jaws (I need to design a mount for the vise).

  • @gerardomarquez2565
    @gerardomarquez25653 жыл бұрын

    Hello John! Awesome, I have a doubt.. ¿Which stock size you input in F360? ...the raw material or the one already sized? Thanks!

  • @nc.92
    @nc.923 жыл бұрын

    Hi. Thanks for the video. It is very useful. What kind of aluminum do you use for molds?

  • @JohnSL

    @JohnSL

    3 жыл бұрын

    6061-T6. These are small-run molds, so cheap and easy to machine.

  • @nc.92

    @nc.92

    3 жыл бұрын

    @@JohnSL Thanks.

  • @squiresuzuki
    @squiresuzuki Жыл бұрын

    So what's the minimum height that you have to waste? 3mm in the jaws and another 2mm above the jaws for clearance = 5mm? I'm new to machining and don't want to waste material, but also don't want to cut it too close, hah

  • @JohnSL

    @JohnSL

    Жыл бұрын

    I generally try to take off the minimal amount of material to clean up each face. That's usually about 0.01" (0.254 mm) in my case. So the total reduction in thickness would be twice that.

  • @BlueFinCNC
    @BlueFinCNC3 жыл бұрын

    The method you have just discovered is the only way to go. Time is the most valuable and important commodity, it is finite and irreplaceable. Aluminum is cheap and endless in supply, don't work for money, work for the production, completion, and standard of quality of the things you make and do. Money will follow. Edge precision has a whole video dedicated to the subject.

  • @JohnSL

    @JohnSL

    3 жыл бұрын

    I'm going to have to search for the Edge Precision video on this. I'm totally sold on this approach now, even though this is just a hobby for me.

  • @BlueFinCNC

    @BlueFinCNC

    3 жыл бұрын

    @@JohnSL kzread.info/dash/bejne/X4OqvKVwiLaxoNY.html

  • @hartmetall515

    @hartmetall515

    3 жыл бұрын

    If you remove a lot of material from a thin plate,the plate will warp,sometimes a lot.