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Type: Posts; User: Zig

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  1. Thread: Brisbane group

    by Zig
    Replies
    58
    Views
    1,946

    Re: Brisbane group

    Hello Metalfab ( Damen),

    still around... still CNCing
  2. Re: AMC Advanced Motion Controls servo drive encoder to tacho converter

    just as stated..external gain block in the feedback path...

    Do you have a similar issue with Your equipment?
  3. Re: AMC Advanced Motion Controls servo drive encoder to tacho converter

    Good news ...

    I have implemented an external modification which has provided the requisite gain.

    Machine operates quietly and precisely.

    Following error is an order of magnitude lower.
    ...
  4. Re: AMC Advanced Motion Controls servo drive encoder to tacho converter

    Two issues...

    My apologies for the spelling mistake..it was not meant to read goos people..it was meant to say good people..which was then misinterpreted as goofs.. sincere apologies.

    As for...
  5. AMC Advanced Motion Controls servo drive encoder to tacho converter

    I am using a coupleof AMC be25A20 brushless servo amps.

    They have a nice feature... apply the quadrature pulse trian and it will generate tacho signal internally to close the velocity loop.
    ...
  6. Replies
    4
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    729

    Re: price of laser cutter only

    I am in the process of building a laser machine based on a Raycus 30W fiber laser.

    Yes its only 30W but it is sufficient to do what i need done.

    Price wise... 30W unit can be had for under...
  7. Replies
    2
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    302

    I have stocks of FR4 in single sided and double...

    I have stocks of FR4 in single sided and double side half ounce copper and 1.6mm thick laminate.
    What do You need?
  8. Thread: Brisbane group

    by Zig
    Replies
    58
    Views
    1,946

    Solar, I am on north side of Brissy and can...

    Solar,


    I am on north side of Brissy and can offer some help with LinuxCNC.
  9. Hey Wookiee, I have some end mills in stock on...

    Hey Wookiee,

    I have some end mills in stock on 3.175mm shanks ( or 1/8" ). I am just north of Brissie. You can find me on iconicpcb.com
  10. Replies
    1
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    1,079

    Check out Jaeger spindles and drives Thats...

    Check out Jaeger spindles and drives
    Thats Alfred Jaeger in Germany
  11. Replies
    2
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    1,129

    No it wont do anything. There is no spindle. ...

    No it wont do anything. There is no spindle.

    Decide on the make and specifications of the most important part of the machine the spindle and precision of the collet.

    While it is important to...
  12. Replies
    11
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    1,257

    paul , I have tried shimming the gantry with...

    paul ,

    I have tried shimming the gantry with some successand noticed that 0.005" thick shim contributed significantly, disproportionately in fact to the shim thickness and shift in misalignment...
  13. Replies
    11
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    1,257

    Paul, Test holes were located nominally on a...

    Paul,

    Test holes were located nominally on a rectangle x=516mm y=413mm

    Regards
  14. Replies
    11
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    1,257

    After initial efforts to minimise errors due to...

    After initial efforts to minimise errors due to orthogonality issues and bearing in mind the that the errors are exhibit translation and dilation effects the errors within +/-100 from center of...
  15. Replies
    11
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    1,257

    The co-location of data file origin and machine...

    The co-location of data file origin and machine frame origin is always guaranteed by the virtue of the fact that the tooling pins are part of soft tooling approach.

    This is to say I use two ...
  16. Replies
    11
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    1,257

    How does the skewing algorithm work? About...

    How does the skewing algorithm work?

    About which ( x,y) point does the data get rotated?

    Does it take into consideration the effects of spindle offset from the gantry face?

    Do You have a...
  17. Replies
    11
    Views
    1,257

    Gantry XY orthogonality

    I have built a gantry machine which does my PCB routing.

    I have opted for tooling posts mid way along X axis at full Y axis span.( two pins as far apart as possible).

    I will then drill tooling...
  18. Replies
    23
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    2,826

    Mike, Thanks for Your comments. I had...

    Mike,
    Thanks for Your comments.

    I had noticed a kind of bunching of pulses which wass caused by frequency multiplication based on edge detection in the initial approach I had considered.

    I...
  19. Replies
    23
    Views
    2,826

    Ok.. Here it is.. motrona interface:...

    Ok..

    Here it is..

    motrona interface: Frequency and Impulse Dividers, Frequency and Impulse Multipliers
  20. Replies
    23
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    2,826

    Mike, The " box of trix " is german made to...

    Mike,

    The " box of trix " is german made to the best of my understanding. I shall try to locate the URL.

    As for the linear motor having non linear thrust .. that is standard fare for any iron...
  21. Replies
    23
    Views
    2,826

    Al, Quite correct. I am trying to press ...

    Al,

    Quite correct.

    I am trying to press AMC BE15A8s into service.
    Sadly they do not have analogue tacho input.

    I have had great joy with BE12A6 in a similar situation using linear scale as...
  22. Replies
    23
    Views
    2,826

    Al, I had tried current drive ( torque ) and...

    Al,

    I had tried current drive ( torque ) and voltage configurations.
    My requirement is complicated by the fact that I am using linear motors with iron core and subsequent nonlinear thrust (...
  23. Replies
    23
    Views
    2,826

    Mike, Normally I would agree with You however...

    Mike,

    Normally I would agree with You however in this instance the velocity loop is not going to protest if a single pulse from the encoder is "lost" due to some signal processing to obtain a...
  24. Replies
    23
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    2,826

    Encoder output is logic level ( 5 V TTL)...

    Encoder output is logic level ( 5 V TTL) quadrature signal.
  25. Replies
    23
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    2,826

    If this were a rotary shaft encoder then there...

    If this were a rotary shaft encoder then there would be no problem; it would be readily replaceable.

    This is a linear encoder.
    The output from the encoder is used in side two loops: a velocity...
  26. Replies
    23
    Views
    2,826

    Encoder pulse rate too low

    I have a requirement for a higher pulse rate from existing and immatable encoder.

    I have seen some gear on the web where the vendor offers a rate multiplier box which accepts quadrature signals...
  27. Replies
    12
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    1,839

    Depends on which PCB design program You use.... ...

    Depends on which PCB design program You use....


    PDF files are really useless in most instances iwhen considering millling.

    There are probably two main approaches ...


    EAGLE PCB ( windows...
  28. Replies
    1
    Views
    1,407

    Typically recirculating ball nut screws have a...

    Typically recirculating ball nut screws have a cyclic nature usually associated with positional error along the length of the screw.


    The cross axis coupling You are experiencing may be due to a...
  29. Replies
    2
    Views
    701

    Bluc, just confirming the largest panel...

    Bluc,

    just confirming the largest panel dimensions are 700mm x683mm?
  30. Replies
    3
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    2,007

    Hey Loz, Send me the DXFs Zig

    Hey Loz,

    Send me the DXFs

    Zig
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