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Type: Posts; User: joeavaerage

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  1. Replies
    2,065
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    130,294

    Re: Milli a new composite mill kit

    Hi peteeng,



    The specs say the rated torque of my new spindle is 3.4Nm. I would guess that I could run a 12mm four flute tool in steel at 2500rpm or 94m/min surface speed.
    This is a guess...
  2. Replies
    2,065
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    130,294

    Re: Milli a new composite mill kit

    Hi peteeng,



    I strongly agree. For a mill such as you envisage being able to cut steel is the goal, and in which case high torque at low(ish) speeds are required from your spindle.
    An AC...
  3. Replies
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    27

    Don't BS NZ Customs

    Hi,
    a while back, a few days before Christmas, I bought a spindle off a chappy in Vietnam. He gave me a great price and Fedex'ed it to me in NZ. I forwarded an email
    to Fedex from the seller...
  4. Replies
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    827

    Re: BST automation vs dy-global eBay

    Hi,



    BS. Why do you suppose all the major machine manufacturers pay big dollars for top quality fixed mounts....because they like paying big dollars when cheap would do?
    Its your money, and...
  5. Re: Mach3 Mill - X axis suddenly 1/5th scale

    Hi,
    I'm guessing from your name that you are in NZ? I am in Christchurch.

    Craig
  6. Replies
    138
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    827

    Re: BST automation vs dy-global eBay

    Hi,
    these are a matched pair but universal ground, good but not great:

    https://www.globalindustrial.com/p/super-precision-bearing-7205cydup4-universal-ground-duplex-25mm-bore-52mm-od

    These...
  7. Replies
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    827

    Re: BST automation vs dy-global eBay

    Hi,

    This looks to be the genuine article:

    https://www.uberbearings.com/BK25-THK?setCurrencyId=2&sku=BK25-THK

    Note particularly that the bearings are listed as '7205 in a DF' set. That is...
  8. Replies
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    827

    Re: BST automation vs dy-global eBay

    Hi,
    this listing looks to be better, but I'm still dubious that they can sell them at $250USD with matched bearings:

    https://us.misumi-ec.com/vona2/detail/221000095199/?HissuCode=BK25

    Craig
  9. Replies
    138
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    827

    Re: BST automation vs dy-global eBay

    Hi,
    do yourself a favor and ring up your favorite bearing supplier and price a matched pair of 7005 P4 bearings.

    I needed a set for my FK25 fixed mount. I got lucky and my local NSK stockist had...
  10. Replies
    138
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    827

    Re: BST automation vs dy-global eBay

    Hi,



    BS. A pair of matched P4 or P5 bearings can easily be hundreds of dollars. The bearings with a broader contact angle are more expensive again.
    Either way they are critical to a machine....
  11. Replies
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    827

    Re: BST automation vs dy-global eBay

    Hi,



    Commonly a ballscrew has two mounts, on at each end. One, the motor mount end, is called the 'fixed mount' in that it has two opposing angular contact bearings and those
    bearings restrain...
  12. Replies
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    827

    Re: BST automation vs dy-global eBay

    Hi Lars,
    your model is unrealistic. In particular you have constrained the base at six places to an 'infinitely stiff universe', and that is not realistic. The infinitely stiff mounting points...
  13. Replies
    14
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    176

    Re: WTB: Wireless Centroid MPG Pendant

    Hi,
    I am sort of surprised that you would consider ditching the Acorn on the basis of cost. You say $900 for a solution at includes a pendant, and I think to myself ......yes that sounds about...
  14. Replies
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    176

    Re: WTB: Wireless Centroid MPG Pendant

    Hi,



    When I say I've 'breadboarded' my design, I bloody well mean it!! I have bought half a dozen of them on which are mounted servo drives, power components,the breakout board such as you've...
  15. Replies
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    Re: WTB: Wireless Centroid MPG Pendant

    Hi,
    yes, it has been a good discussion. It seems I have found someone whom agrees with me that a pendant can actually be very simple, it does not need all the bells and whistles. It seems many a...
  16. Replies
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    Re: WTB: Wireless Centroid MPG Pendant

    Hi,



    Have Centroid 'excluded' other pendants?. Mach is a commercial software product and they might have chosen to limit the access to their code so that manufacturers could
    not make products...
  17. Re: Mach3 Board only has 4 input pins how to connect Limit and homing when 3 used?

    Hi,
    OR buy an Ethernet Smoothstepper. Has 51 Inputs and outputs. Compatible with Mach3 and Mach4.

    Craig
  18. Replies
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    Re: Help with compatible servomotor

    Hi,
    the pictures did not show up.

    Yaskawa servos are very good but also very expensive. The servo needs to be matched to the drive, one without the other is just a joke.

    I use Delta B2 series...
  19. Replies
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    Re: WTB: Wireless Centroid MPG Pendant

    Hi,
    either buy a Centroid pendant and be done with it.........or make a manual one.

    I use Mach and have done for years. I used a VistaCNC P1A pendant for many years, and it too was USB connected....
  20. Re: servo drive for motor YASKAWA SGMS-30ACA-TV11

    Hi,
    good luck. You may have noted that there seems to be plenty of second hand servos to choose from......but very few matching drives. Drives blow up and if they are too
    expensive of difficult to...
  21. Re: Problems with synchronising spindle for screwcutting

    Hi,
    is the servo drive direct off-line? That is to say is it powered by 230VAC direct from the mains supply? Such servo drives are very VERY common but they have an issue
    in that they 'pollute'...
  22. Re: Mach3 Mill - X axis suddenly 1/5th scale

    Hi,
    another possibility is that one of the microstepping switches has changed or failed, so the stepper now requires 1000 steps rather than the 200 you had originally programmed it.

    Craig
  23. Re: servo drive for motor YASKAWA SGMS-30ACA-TV11

    Hi,
    the servo I linked to is rated to 1500rpm and produces 19.1Nm torque continuous....but its maximum speed is 3000rpm.
    At 3000 rpm it would have 19.1 x 1500/3000 =9.55Nm torque.

    So this servo...
  24. Re: servo drive for motor YASKAWA SGMS-30ACA-TV11

    Hi,
    I cannot find any information on it either. It does not look to be anything out of the ordinary so there must be drives for it somewhere.
    Yaskawa is expensive, so no matter what you will pay...
  25. Re: Mach3 Mill - X axis suddenly 1/5th scale

    Hi,

    that sounds like you have a G51 active. Read up on G51. G51 scales one or more axes while a G50 cancels all scaling.



    No, I disagree. Aside from anything else why does it just happen on...
  26. Re: Mach3 Mill - X axis suddenly 1/5th scale

    Hi,
    have you got a G51 Gcode scale active?.

    Craig
  27. Replies
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    Re: Single or Double Start Ball Screws?

    Hi,
    No.

    Craig
  28. Replies
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    Re: BST automation vs dy-global eBay

    Hi,



    I think they are. 100mm thick with a 20mm gutter should be any amount stiff enough. I think you may be thinking that it has to be nnn N/um, but your estimate is too high.
    It would be nice...
  29. Replies
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    Re: Single or Double Start Ball Screws?

    Hi,
    a double start 5mm screw is the same as a single start 10mm screw. No need to change anything.

    Craig
  30. Replies
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    Re: Toroidal Transformer hookup

    Hi Al,
    I dont know what manual you are looking at but you are not correct.

    The DM860H HAS a rectifier built in so you can use AC or DC. According to this pic up to 80VAC or up to 110VDC.

    Craig
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