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Type: Posts; User: z05

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  1. Re: Spindle motor upgrade choice? AC Servo/BLDC, Induction?

    Hey, thanks a lot for taking so much of your time to reply to me in such great detail. Really appreciate that!

    Being in the industry and working with China for many years, I can definitely add my...
  2. Re: Spindle motor upgrade choice? AC Servo/BLDC, Induction?

    Found these options online, can get 3.8kW actually, not sure if its needed tho. What do you guys think? Thinking of eitehr getting 2.6kW or 3.8kW model.

    ...
  3. Re: Spindle motor upgrade choice? AC Servo/BLDC, Induction?

    Hi Craig, I am really not looking for an overkill premium solution at higher price, I just need speed control for it and faster RPM, and if motor will be more silent, its a plus. I could throw...
  4. Re: Spindle motor upgrade choice? AC Servo/BLDC, Induction?

    I am already doing a CNC conversion actually. Since you are in China, are you selling such motors by any chance? haha. I would be interested. Also the real question, if I get an AC servo with...
  5. Spindle motor upgrade choice? AC Servo/BLDC, Induction?

    Hi guys, I have just received my Harbor Freight knee mill, entry level obviously. I like the machine, but I am looking to sell its monstrous AC motor in the back and do an upgrade. I am leaning...
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    Re: Close Loop Stepper vs BLDC servo vs AC Servo

    Jim, well I guess it is hard to beat a knee mill that cost me $1850 total delivered with a coupon. At least for the price. I do have realistic expectations for that. And I only need it for rough...
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    Re: Close Loop Stepper vs BLDC servo vs AC Servo

    I wansnt commenting on communation at all, I am not that familiar with that. I was strictly discussing hardware design actually. And I actually have plenty in my garage and unlike DC models all my AC...
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    Re: Close Loop Stepper vs BLDC servo vs AC Servo

    So one human is identical to another one that is turned inside out? lol. You just called the opposite identical. But hey, you answered your own question. I think your judgement of "identical" is way...
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    Re: Close Loop Stepper vs BLDC servo vs AC Servo

    Well, even my 3D printer has no limit switches with stall detection, same thing is even easier with close loop stepper, as encoder can sense that with higher accuracy beyond one whole step.
    And I...
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    Re: Close Loop Stepper vs BLDC servo vs AC Servo

    Yes, BLDC is what I meant. The reason I am asking, first of all, by design AC servo would have less inertia due to lighter rotor, it would not require and additional DC power supply for it, it would...
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    Close Loop Stepper vs BLDC servo vs AC Servo

    Hi Guys, I am relatively new to servo area. I have purchased close loop stepper system for my mill cnc conversion project, and it looks like, while being twice cheaper, I will be missing out on a lot...
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    Re: CNC converstion, which motor for a knee mill?

    Hey, have you done that conversion in the end 14 years ago? lol. I am looking for some docs about this model conversion, but cant find any at all...
  13. Re: My Harbor Freight Vertical Knee Mill (40939) Review

    Thanks for sharing this. Very little info online. I am waiting for mine and it got shipped to me in 2 days, way sooner than I was preparing for :) Super excited!

    As a side question, I will...
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    Re: Precision Matthews Alternative vendor?

    Thanks, I am in Florida tho :) Already purchased the one from Harbor Freight, the red knee mill. I think that will do all I need and then some more :) The real question now is how much time it will...
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    Re: Precision Matthews Alternative vendor?

    27x7 mill is more than enough for me actually. I only need it for rapid prototyping as I have a professional supplier for production. But prototyping with them is very slow and every time I waste 2-3...
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    Re: Precision Matthews Alternative vendor?

    Thanks for a response, I know that all already. I don't need a kit for something I can easily do myself, especially if that can save me 70% of kit cost. I designed and 3D Printed "conversion kit" in...
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    Precision Matthews Alternative vendor?

    Hi Guys, I have an urgent need of a CNC mill and I have purchased a basic one from eBay for $1900 and it turned out to be unusable and it is going back. I wanted to buy Precision Matthews mill...
  18. NEED HELP with connecting my VFD/Spindle to Pokeys57CNC board.

    Hi everyone, call me a noob, but I am struggling to figure out how to connect my crappy chinese VFD board to my new control board. I already connected limits and steppers, but afraid to mess up...
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