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Type: Posts; User: hanermo

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  1. Re: Hobbyist in south bay area / San Jose, seeking rental time on mills

    A:
    Go with your original post to the actual machine shops in the area.
    Offer 200$, to learn to set up their basic jobs off-shift.
    Making flats, cubes, dimensioned stock.

    1 of 4 might take you...
  2. Re: $30,000 budget -- help me build my new machine!

    The goal is perfectly doable.

    There are no actual hurdles to getting such a machine, technically.
    Contact in pm if you want.
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    Re: Slightly sizing down a carbide drill

    I suspect what you want is a carbide reamer.

    Since you seem happy with interpolated holes, I also suspect you don´t achieve 0.01 mm +/- in size cylindricity and straightness.
    Do you have go / no...
  4. Re: Mach3 Function wizards Lathe threading REV 1.17 Problem . Help me please.

    I don´t think the issue has anything to do with slowing down as rcaffin suggested.

    The thread looks fine, consistent, and thus the pitch is wrong.

    Does g1 move x and z accurately.
    E.
    Move 30...
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    Re: Query with Ball Screws and Lead Screws

    OP - Max...
    define it better.
    If 8 stepper motors costs are a critical path, you will struggle to get anything remotely useful for less.

    Precision and high resolution is the basis for steppers...
  6. Re: Student organization looking to build CNC milling machine for school donation

    Please point to a twin gantry machine picture so we know what you mean ... ??

    The most rigid machine possible is a twin-column milling machine using a moving table, usually y moves.

    The two...
  7. Re: Spindle Regrinding Service for Benchtop Machines

    It´s perfectly possible to self ghetto-grind the spindle taper using any of various methods.
    Multiple anecdotes and examples from real professionals on the web attest to this.

    Any grinding...
  8. Re: A bunch of random questions about new CNC mill build

    I will Try to help as much as possible.

    Screw thrust or yield is actually right.
    Every decent 5x machine has similar 2-30 kn thrust rigidity on the linears.

    But the rotationals must have 100...
  9. Thread: Concrete VMC

    by hanermo
    Replies
    163
    Views
    7,406

    Re: Concrete VMC

    Agree completely.
    Epoxy is more than hard enough - industrial epoxy.
  10. Re: Why most (non-router) milling machines don't use self-contained spindle?

    Lots o confusion.

    Self-contained direct drive spindles, are things like the integral drives made by Mori Seiki at 25.000$ a pop.
    The are balanced not just statically, but dynamically, and very...
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    Re: Tips for straighter bores

    This time I disagree with most posts.

    We did not get original posters d/l tolerances .. which are what it is all about.
    And size, depth, speed, qty goals.

    A reamer will deliver a hole about...
  12. Re: Need to generate a trigger signal after each move- Anilam 1100

    Can you trigger any io via sw ?

    If not, might it be feasible to trigger action via a programmable relay, driven by the pc ?
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    Re: THK Linear Guides - Rigidity For Lathe

    My saddle plate is 200 mm (or 180 mm) wide, 520 mm deep iirc.
    F1 acero-calibrado tool steel, 20 mm thick.

    12x lathe, spindle originally 1.5 kW industrial 220V EU, now 2.5 kW ac brushless servo.
    ...
  14. Re: Need help brainstorming a solution for this mill turn spindle

    Quinn .. lemme add my observations ..
    as I have actually done this, and am using this, on my Mach3 lathe.

    30 mm wide, HTD8 belt.
    Extremely stiff mount, 20 mm thick tool steel plates, 30x30 mm...
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    Re: What Part To Start ?

    Em..
    You are extremely talented and at the top-end of industrial designers if you are participating in the design of carbon-fiber yacht hulls.
    These tend to be pre-preg today for manufacturing and...
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    Re: How much rigidity do I need

    I used Nm incorrectly, when I meant N as in force.
    10 N == 1 kgf, or 1 kg of push or pull.
    The f indicates force.

    My examples are meant to illustrate, qualify, add credence, and act as facts...
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    Re: How much rigidity do I need

    If you push the spindle nose with 25 Nm, it should deflect 1um, for 25 Nm/um rigidity.
    25 N force is 2.5 kgf, or 2.5 kg of push force.

    Force at the tool end no, at the spindle.
    The toolholder...
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    Re: Designing new Router called Maximus

    My counterpoint was/is that cutting plywood efficiently, needs a great deal of rigidity.

    You are building a tool to cut 2.4 m sheets, of presumably some thickness like 12-15 mm++.
    There is no...
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    Re: How much rigidity do I need

    The pdf posted is excellent - read it some years ago.

    One takeaway - for milling steel.
    Milling machines need 20-30 Nm/um deflection // rigidity iirc.
    And better machines have 70 Nm/um and up.
    ...
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    Re: What Part To Start ?

    I mostly disagree with the thread of your arguments.
    There are zero light, good, industrial machines being made and sold.
    Zero.

    1.
    Big is one thing.
    Relatively heavy is another.

    2.
    Yes.
  21. Replies
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    Re: Wanted small gang tool cnc lathe

    Price ?
    Size ?
    Use ?
    Omniturn for real use ..
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    Re: Designing new Router called Maximus

    Fwiw..
    sorry to be so negative.

    For cutting alu efficiently you need about 10x more stiffness.
    Look at the haas router for inspiration, it is the same size, grx series iirc, now discontinued.
    ...
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    Re: THK Linear Guides - Rigidity For Lathe

    Yes.
    No.
    Depends.

    A fast look did not show good details on the linear guides.

    You want rigidity, that comes from size.
    Definitely the lathe will work, but sf quality will depend on cut...
  24. Thread: Concrete VMC

    by hanermo
    Replies
    163
    Views
    7,406

    Re: Concrete VMC

    I disagree.
    So do all major industrial manufacturers of specialist epoxies.
    Hysol (locktite) 3478 is one example.

    Rated strength in crush is 1000 kg / cm2.
    So my 2200 mm long rails, 2 of, 35 mm...
  25. Re: CNC Toolpath Strategies for Smaller Machines

    I suggest you are chasing a unicorn.

    You are already getting excellent results, much better than most, and a lot of it is probably due to the servos.
    Not at all due to power, or speed in rpm, but...
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