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Type: Posts; User: NIC 77

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  1. Replies
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    Re: DIY CNC for milling steel - or close enough

    I don't think that you're going to be able to get a custom cast iron casting, mold made, poured, stress relieved, and machined for cheap. Plus then you need some lifting tools, like a forklift, to...
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    Re: 150x100cm Steel frame router build

    https://www.wonststore.com/Linear%20Motion
    Professional Linear Motion Solution Provider in Taiwan. - ??????????
    PMI-GROUP// PMI PRECISION MOTION INDUSTRIES, INC.

    WON is from Korea
    STAF is...
  3. Replies
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    Re: 150x100cm Steel frame router build

    Peter,

    I've heard you say before that you should go with heavily preloaded cars. And that has me wondering.

    Are you talking about the inexpensive cars that you can get from China or is there...
  4. Re: Fusion 360 Reduces Functionality for hobby users

    I'm getting too invested in something I don't use, will never use, and don't care about. I was almost thinking of trying it out though, against all my own good advice.

    But one last point from me,...
  5. Re: Fusion 360 Reduces Functionality for hobby users

    https://www.youtube.com/watch?v=WpE_xMRiCLE
  6. Re: Fusion 360 Reduces Functionality for hobby users

    Good idea. I'm gonna cancel my internet service and then I can afford F360!

    Oh...wait...

    Yeah, you need to be online to use it, going to have to think of something else. Car insurance?
    ...
  7. Re: Fusion 360 Reduces Functionality for hobby users

    Coincidentally, I just spent a few minutes trying to find a post I remember writing some years ago where I compared Fusion360 to photobucket. Couldn't find it.
  8. Re: Fusion 360 Reduces Functionality for hobby users

    That's a good point.



    It seems to me that this is exactly what they did. They've created a monopoly. And now they've raised their prices. Oh, and they now have all your design files held...
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    Re: DIY CNC for milling steel - or close enough

    So your budget of up to $6000 is reasonable if you know what you're doing and do most of the work yourself. But are you thinking that you will get someone else to manufacture this for you, a custom...
  10. Re: Fusion 360 Reduces Functionality for hobby users

    $300 every year for a hobbyist is excessive. I hate this recurring yearly revenue model as opposed to simply being able to buy it and use it. Over the past few years there were periods where I was...
  11. Re: Ballscrews into New Zealand. Im buying, anyone want to get onto this boat?

    2552 mm bearing to bearing with an end fixity of "C" and a root diameter of 21mm (25mm diameter ballscrew) gives a critical speed of 573 RPM according to the Nook calculator
    ...
  12. Re: Ballscrews into New Zealand. Im buying, anyone want to get onto this boat?

    For the 2700 mm ballscrew, what is the bearing to bearing distance between free and fixed ends?
    For the 2300mm ballscrew, same question?

    Do you have a link to a datasheet for these motors? I...
  13. Re: Ballscrews into New Zealand. Im buying, anyone want to get onto this boat?

    Do you have a torque vs speed graph for these motors?

    Yes, you need to go smaller than 40.

    Are you thinking of upgrading to servos? The ballscrew and the motor need to be paired for best...
  14. Re: Ballscrews into New Zealand. Im buying, anyone want to get onto this boat?

    I meant if it was something like a 3240 or 2540 you might be able to make it work with gear reduction from the motor, depending on the motor used and what you wanted to accomplish.

    Pitch and lead...
  15. Re: Ballscrews into New Zealand. Im buying, anyone want to get onto this boat?

    I randomly stumbled across this post when I looked at "today's posts".

    Is this an upgrade for the router you mentioned in other posts? Are you committed to this deal?

    4005 @ 2700mm long is a...
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    Re: Looking for some input to my design.

    Lots to read through, and I probably missed half of it.

    At first, I misunderstood what was being said about the "double belts" and I thought Peter was telling you to drive it with one belt...
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    Re: Importance of stand alone computer for Mach 4

    I can't speak to Mach 4 as I've never used it, but in Mach 3, an SSD drive wouldn't make a rat's butt worth of difference IMO. And Mach 3 has never skipped a beat for me, running on XP.

    Why...
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    Re: ball screw questions

    Sounds like you're happy?

    If so, that's great! I hope it works out for you. Please let us know how it goes. C5 ground ballscrews sound very decent, and I'm sure you told the salesperson that...
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    Re: Gantry mill with moving gantry for Z-axis

    Yeah, that's the way to do it. Looks like that machine is well thought out. I wonder how much they will sell for?

    It only has travels of 13" x 13" on X and Y. 12" x 24" would be so much better...
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    Re: ball screw questions

    These are just my opinions.

    I just didn't see the need for the 32mm diameter ballscrews. I have only really said to avoid the 3205 (even though it would work, it just won't perform as well as the...
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    Re: Importance of stand alone computer for Mach 4

    I think the important thing is that you are not connected to the internet.

    For example, when everything is working fine on your machine you don't want some random windows update to mess you over. ...
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    Re: ball screw questions

    Easiest thing is to get them to do the end machining for you.

    "TBI Motion" is the name of the ballscrew manufacturer. Alibaba.com and Aliexpress.com are the names of websites.

    I'd start with...
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    Re: New build questions!

    The "Dual column rising gantry with moving table" design might work for you. This would allow you to mechanically counterbalance your entire gantry.

    The disadvantage to this design is that you...
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    Re: ball screw questions

    So did you get a quote? What did they recommend? Keep us posted, curious to know.
  25. Thread: Concrete VMC

    by NIC 77
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    Re: Concrete VMC

    Fantastic workmanship as always!
  26. Replies
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    Re: Gantry mill with moving gantry for Z-axis

    One nice thing about the "dual column rising gantry moving table design" vs a "dual column rising gantry without moving table design" is that it's easier to mechanically counterbalance the gantry.
    ...
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    Re: ball screw questions

    If you look at the nook critical speed calculator:

    https://www.nookindustries.com/resources/engineering-calculators/metric-critical-speed-calculator/

    I believe the end fixity is "C" for one end...
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    Re: ball screw questions

    I wrote you a very long reply but the forum crapped out on me when I went to "preview post" and I lost it all. I hate when that happens.

    If it were me, I'd go with 2510 ballscrews using either...
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    Re: ball screw questions

    Yes and No. If you're talking about something that is providing a force while not moving, that's true.

    When a machine is accelerating into a cut, it's different. The available torque from the...
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    Re: Help Me Drive Some Servos Please!

    Some further emails with sales at JMC have clarified this a bit.

    It's a 1000 line incremental encoder with quadrature encoding for 4000 CPR. Same as is on most of the Leadshine closed loop...
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