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  1. #1
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    We had a contract to make a gantry scanner table for 4k$ 1mx1m. and this was result

    A good design question lists your overall requirements™ The best question deserves a better answer. ™
    ... Tony Stewart EE since 1975

    •   Alt13th August 2017, 16:24

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    Re: We had a contract to make a gantry scanner table for 4k$ 1mx1m. and this was resu

    What the contract said? Did you provide a detailed specification?

    (Perhaps the contract went to a lawyer!)- no offence meant.

    •   Alt13th August 2017, 18:05

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  3. #3
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    Re: We had a contract to make a gantry scanner table for 4k$ 1mx1m. and this was resu

    We spoke with client, wrote up specs, provide 3D CAD model of conceptual design , then got PO.

    1mm accuracy over 1000 mm square table for magnetometer scanning. With 1/4 step I get 0.25mm resolution and about 600mm/s speed and 1/16 step is of course smoother and lower.

    I can print out a laser ruler on client's plywood base and adjustable Z axis legs will be included.
    Click image for larger version. 

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    For fun I printed a 350pix JPG image onto a wood box, which with only 1W laser toy takes a couple hrs.
    Last edited by SunnySkyguy; 14th August 2017 at 16:20.
    A good design question lists your overall requirements™ The best question deserves a better answer. ™
    ... Tony Stewart EE since 1975

    •   Alt14th August 2017, 16:11

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    gantry scanner table on UNO from PC control

    Update with https://www.youtube.com/attribution_...m-upload_owner.
    Added Arduino card with CNC 4axis Shield
    Upgraded software with GRBL Panel
    Created XY spiral test pattern in Excel with Gcode and read by GRBL Panel
    It works perfect as expected.

    Final Assy is incomplete needing Arduino case, legs corner braces and cable straps ready for laser, magnetometer or plotter use.
    A good design question lists your overall requirements™ The best question deserves a better answer. ™
    ... Tony Stewart EE since 1975

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    Re: We had a contract to make a gantry scanner table for 4k$ 1mx1m. and this was resu

    Quote Originally Posted by SunnySkyguy View Post
    The noise is crying out for attention.

    •   Alt29th August 2017, 03:31

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  6. #6
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    Re: We had a contract to make a gantry scanner table for 4k$ 1mx1m. and this was resu

    Yes that was intentional. With interpolated smooth 0.1mm resolution in continuous motion it is almost silent , but this was a series of big jogs and the 1.2m X axis has a natural resonance that can be tightened from bearing tension and disappears by eliminating macro steps into small smooth velocity control which are only sub sonic spectrum. In laser print mode all you hear is the quiet step rate of the motor.

    Back when Maxtor made the first high speed disk drive I had SN 7 and all production units had an R2D2 calibration sound to measure servo gain. By comparison it was much louder. During cal. This is SN 1 and it's 1st test, so yes now I can optimize it.

    - - - Updated - - -

    https://m.youtube.com/watch?feature=...&v=I7DCYEM3dW8

    Square corner test. Rubber edges making annoying sound. Gear centred but dome nylon guides must be tilted
    Last edited by SunnySkyguy; 29th August 2017 at 15:56.
    A good design question lists your overall requirements™ The best question deserves a better answer. ™
    ... Tony Stewart EE since 1975

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