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Type: Posts; User: CosmosK

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  1. Thread: CNC Drag Knife

    by CosmosK
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    0
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    646

    CNC Drag Knife

    Got a new one out:


    Adjustable Offset Drag Knife


    https://cosmos-industrial.com/images/3005-300.JPG


    Adjustable Offset: 2-12mm (~1/16 - 1/2”)
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    CNC Pen Marking Tool - ER16 - ER16 MINI

    New variant of this tool. Threads directly onto ER16 threads (also a ER16 mini version).

    https://www.cnczone.com/forums/attachment.php?attachmentid=438330&stc=1

    ...
  3. Thread: CNC Drag Knife

    by CosmosK
    Replies
    0
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    657

    CNC Drag Knife

    I had been making this for some time, then it was offline. It is now back in 7075 and Gray anodized.

    https://www.cnczone.com/forums/attachment.php?attachmentid=438328&stc=1

    3 offsets to choose...
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    Re: 10% Off CNC Accessories through July 4

    sale still on for a couple more days.
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    5,959

    10% Off CNC Accessories through July 4

    10% off CNC accessories now through July 4. Use coupon code CNC0704

    Get more out of your machine with Pen Marking Tools and a CNC Drag Knife

    CNC MACHINE ACCESORIES
    ...
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    New Pen Marking Tools - 2016 models

    I made a promo video for my pen marking tools (complete with cheesy techno music), check it out:

    https://youtu.be/WddzboHHkGw

    The new models (2016) feature significant improvements:
    -5 writing...
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    Re: Eliminating Burr on CNC Router

    On wood, I preemptively chamfer the outline. This lets me use an upcut end mill. There's also downcut, compression, whicj might help, although, I don't think they make compression for 1/4"...
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    Re: What Am I Doing Wrong?

    My first mill was a Sherline. It was good for softer stuff, but AL was always difficult. Mostly the deflection of the machine would be my issue. You need to take light cuts. However, .010" with a...
  9. Can Geomagic do design tables and configurations

    Coming from Solidworks. Looking at this program. Can you do configurations? Can you do design tables? Thanks
  10. Re: CNC Routing Aluminum Face Plates - I Keep Breaking Bits

    2800 IPM? Do you mean SFM? I think I've sen that number for carbide.

    I'd defer the the manufacturer's numbers to be on the safe side, at least to start.

    A router is not a mill, true. So, you...
  11. Re: CNC Routing Aluminum Face Plates - I Keep Breaking Bits

    If 10k RPM is fixed, 20 IPM will give you .001" chip, 40 IPM .002" chip.

    I'd find a carbide bit for getting through the anodize.

    I would not go 250 IPM. Maybe it can be done, but seems way...
  12. Re: CNC Routing Aluminum Face Plates - I Keep Breaking Bits

    There are several calculators out there: Here's one, look at equation #2 Milling Formula Calculator

    1/8" will be a better fit to run on the router. I see 13K RPM

    What RPMs do have have as...
  13. Re: CNC Routing Aluminum Face Plates - I Keep Breaking Bits

    I usually go by the end mill specs too. Here's an example: maritool.com/images/speeds-and-feeds-1004.pdf
    This shows .0015 chipload for 1/4 end mill in Al. If you do the calculations, the SFM...
  14. Re: CNC Routing Aluminum Face Plates - I Keep Breaking Bits

    That'd be my guess why the cutter only makes it through 3 parts.
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    Pen Marking Tools

    I've been making these and they've been fairly popular.

    I make a mini sharpie pen marking tool and now I have a full size sharpie version available. The combo has the pencil tool as well. This...
  16. Thread: I'm desperate

    by CosmosK
    Replies
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    3,673

    Re: I'm desperate

    Ha! This is your quest and your decision. The more research you do, the happier you will be with your decision.
  17. Thread: I'm desperate

    by CosmosK
    Replies
    79
    Views
    3,673

    Re: I'm desperate

    You guys are correct. There is a third case not pictured. One bearing support at motor end and NO bearing support at the free end. This is the acceptable case for some applications. Sorry for the...
  18. Thread: I'm desperate

    by CosmosK
    Replies
    79
    Views
    3,673

    Re: I'm desperate

    Spindle runout is basically wobble. As far as where it is measured, if you chuck up a perfectly straight 12" rod and spin it, there will be more wobble at 12" than at the collet. Just something to...
  19. Thread: I'm desperate

    by CosmosK
    Replies
    79
    Views
    3,673

    Re: I'm desperate

    Also, spindle runout is important. Also, how far it is measured from the collet is important. I got a mini mill from little machine shop and while fine for what I do, if I put a long drill in, I...
  20. Thread: I'm desperate

    by CosmosK
    Replies
    79
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    3,673

    Re: I'm desperate

    You don't need a CNC machine to make use of all the steel you bought. An old mill fitted with a DRO and you can make most if not all the parts you need for your DIY machine. Just a thought,...
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    Re: Router Bit or Endmill

    My 2 cents. My estimation is end mills are cheaper because there are tons of machine shops out there. They are highly used, so prices come down. I have a hard time rationalizing buying a more...
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    Re: Looking for a benchtop CNC for 12"x12"+

    I did see your post in my inbox and you ask some good questions. I have not explained fully what I want to be able to do. True: I don't know exactly what all I will do, I only know some. What I'd...
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    Re: Looking for a benchtop CNC for 12"x12"+

    Thanks all for the help! I ended up getting a router, so you were correct Carl. I learned I don't have enough money to mill the size parts I want to make, but I can route them. I got a Camaster...
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    Re: Looking for a benchtop CNC for 12"x12"+

    Currently, I'm eyeing this one:
    Stinger I CNC Router
    Upside seemingly that it comes with computer, big work area, seems fairly stout and it’s NOT huge.
    I have some advising me to just get a...
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    Re: Looking for a benchtop CNC for 12"x12"+

    Ok, let me rephrase. If I up my budget to 10k, what is the best CNC machine I can get? Most likely needs to be 120V and can't be too tall (Bridgeport mill too large). I'm seeing Tormach and Syil. ...
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    Re: Looking for a benchtop CNC for 12"x12"+

    very nice :)
  27. Replies
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    Re: Looking for a benchtop CNC for 12"x12"+

    Tormach PCNC 770 looks about right, granted a 12x12 part would have to be spun around and done in two halves. 600 pounds would be interesting trying to get in the basement
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    Re: Looking for a benchtop CNC for 12"x12"+

    Also, do you know who makes good CNC kits for the motors and scales?
    Thanks
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    Re: Looking for a benchtop CNC for 12"x12"+

    Thanks! Both those look good. I wonder what makes a a machine a router and not a mill. Can they only be programmed to run 2D shapes?

    I've thought about refitting the mill I have, but probably...
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    Re: Looking for a benchtop CNC for 12"x12"+

    I see on the spam, thanks

    Well, I have some parts I want to make and some of the parts are circular disks about 10" diameter made from 12x12x~1 plastic. There are a hundred things I'd like to do...
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