502,814 active members
4,664 visitors online
Register for free
Login

Search:

Type: Posts; User: CarbideBob

Page 1 of 9 1 2 3 4

Search: Search took 0.00 seconds.

  1. Replies
    18
    Views
    7

    Re: CNC Boring Bar vs. Interpolation?

    Interpolation will always make a lobed or not round hole as compared to a rotating tool like a boring bar.
    T'is the nature of the beast. As stated many variables so each machine tool is different....
  2. Re: Anyone using a probe to perform on machine inspection?

    No one here using a probe to measure parts?
    Come on people.... Speak up............Someone must be using their machine to do this,

    What are you working with on the software side?
    Bob
  3. Replies
    10
    Views
    1,181

    Re: Blacklash with glass scale Heidenhain

    bbutcher,
    No matter how close your screws fit there will be backlash and the real problem is a response lag time which makes the loop unstable.
    (lag time plus fast controller = oscillation, the...
  4. Replies
    2
    Views
    385

    Re: Confusion regarding Servo drive

    Ok, this gets a little messy.

    You try to control two things in your servo loop.
    First is speed, the velocity side. You want to maintain a certain speed so that your cutting rate per tooth remains...
  5. Re: Anyone using a probe to perform on machine inspection?

    Sorry, did not mean to tick you off.
    We have been doing it since the early 80's so maybe it just seems easy here.
    We write all of our probing and size control software using the touch probes or...
  6. Re: Anyone using a probe to perform on machine inspection?

    Am I getting this right?
    You want to use the same machine that made the parts to do the final inspection report?
    Never been bitten in the ass by this, or at least understand why it is not a good...
  7. Re: Backlash Compensation, your opinions please!

    At the best you can get a close number.
    Lash comp changes with tooling pressure and load,
    The "free state" number will be too large for normal usage but it gets you an idea of the range to use....
  8. OMG, .035-.060 wide diamond cutoff wheel, lots...

    OMG,
    .035-.060 wide diamond cutoff wheel, lots of coolant, and 15 seconds on a surface grinder. It doesn't get much easier than this.

    All of the above methods make me shudder and wonder if the...
  9. Thread: help?

    by CarbideBob
    Replies
    10
    Views
    1,256

    A great idea and some good staring points. It...

    A great idea and some good staring points.
    It seems the inventor(s) over-promised some features and severely underestimated the world of motion control.

    While I was an early "I'm not believing...
  10. Replies
    24
    Views
    1,111

    Excellent comment, and all items adding a...

    Excellent comment, and all items adding a different type of error to the system.

    Since we don't know what the OP is building it's impossible to give a good answer.
    There is a world of design...
  11. Replies
    20
    Views
    9

    And why do you think this is? My preference by...

    And why do you think this is?

    My preference by far is Mitutoyo. They last a long time. I have one that is older than some of my machinists.
    Some of my guys like the Tesa/B&S but I don't like the...
  12. Replies
    77
    Views
    4,824

    While you have identified a few of the simple...

    While you have identified a few of the simple things involved in machine tool accuracy (balls screw quality, minimum command resolution, minimum step response, bearing quality) there is a whole lot...
  13. Its a hollow shaft unit. Hole is for wires or...

    Its a hollow shaft unit. Hole is for wires or piping to go through.

    How much weight will it handle?
    None, its a component set not a mounted unit. You need to build your own housing, mounts, and...
  14. Ok , given your posted numbers and the average 50...

    Ok , given your posted numbers and the average 50 hour week for a good cnc machinist/programmer your income after expenses for this year is about $140,000?
    I'm impressed, but that's a bit above what...
  15. Thread: DTI advice

    by CarbideBob
    Replies
    9
    Views
    1,198

    Buy an Interapid and never look back. Nothing...

    Buy an Interapid and never look back. Nothing will last longer. (They are non-magnetic too which helps on SGs with magnetic chucks.)
    Brown & Sharpes are my second choice but they only live about 6-8...
  16. Replies
    5
    Views
    275

    In my shop, almost all (90%) are 4140, 36-48 Rc...

    In my shop, almost all (90%) are 4140, 36-48 Rc depending on who I'm making them for.
    8620 is very rare to see nowadays in lathe tools, usually only milling tools and not used all that often. It is...
  17. Replies
    202
    Views
    12,560

    Hello, anyone running this yet? A very...

    Hello, anyone running this yet?
    A very interesting concept with a few basics flaws in the logic, still seems like basic stepper motor stuff should be working by now.
    Is this gonna fall under "take...
  18. [QUOTE=Andre' B;612083]The way it was explained...

    [QUOTE=Andre' B;612083]The way it was explained to me with ALTIN coatings was they need to get hot so the Al oxidises as it is exposed and the chip is then rubbing on an aluminum oxide surface. At...
  19. Replies
    202
    Views
    12,560

    Well I see I've revved up a few people. Good...

    Well I see I've revved up a few people.
    Good that was my intention.

    I have a very large problem with anyone who announces that their product is ready and suck money from people's pockets and then...
  20. Replies
    202
    Views
    12,560

    Ok, I've held off long enough. The entire...

    Ok,
    I've held off long enough.

    The entire concept of this is system is not based on reality.
    I understand the seduction of the concept but I've got 30 years experience in machine vision parallel...
  21. Replies
    202
    Views
    12,560

    So where is this thing standing? As I posted...

    So where is this thing standing?
    As I posted long ago this is a very ambitious project.

    I'm guessing Bruce and his associates are getting a hard lesson in machine dynamics. (Ouch, been there,...
  22. Replies
    1,018
    Views
    57,167

    Just a couple of basic engineering things to...

    Just a couple of basic engineering things to think about.

    Solid worm gears need some clearance to operate or they lock. Worm gears are not very efficient which is why they don't backdrive easily....
  23. Replies
    13
    Views
    1,190

    Unfortunately I can't disclose some of the...

    Unfortunately I can't disclose some of the details in our dual loop system as we hold them as "trade secrets" and our competitors are still trying to figure out what we have done.

    Most importantly...
  24. Replies
    13
    Views
    1,161

    Inserts and their holders are matched sets. ...

    Inserts and their holders are matched sets.

    The letters call out a specific shape to the insert. This insert needs to be used in a holder designed for this shape. You would not use a TNMG in...
  25. Replies
    13
    Views
    1,190

    Ignore this post if you wish, seems that most...

    Ignore this post if you wish, seems that most here think I'm nuts anyway. (chair)
    My first question would be ---- Why?
    Feedback from linear scales seems logical. In reality it is full of problems...
Results 1 to 25 of 210
Page 1 of 9 1 2 3 4