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  1. #1
    Join Date
    Dec 2013
    Posts
    11

    Heidenhain linear encoder as input

    Hi,


    I trying to retrofit a old Maho 600 with Kflop / Kanalog and Mach3. The old controller uses a linear encoder (sin /cos) as input. Can I use the 8 ADC on the Kanalog as input for the axis.

    How do I select the ADC of the Kanalog as input channels 0 and 1 in the configuration screen.

    thanks in advance for your support.

  2. #2
    Join Date
    Dec 2003
    Posts
    24221
    Heidenhain used two signal levels for the sin/cos models, you can get a sin/cos to TTL differential convertor, often avail on ebay.
    Al.
    CNC, Mechatronics Integration and Custom Machine Design

    “Logic will get you from A to B. Imagination will take you everywhere.”
    Albert E.

  3. #3
    Join Date
    May 2006
    Posts
    4045
    Hi markder13,

    As AL points out it would be much simpler to get a converter and just connect digital TTL Quadrature.

    But KFLOP does have an Input Type = Resolver that will accept sine/cosine ADC signals. But they will have to have significant voltage amplitude to get a nice sine wave measurement on the +/-10V 12-bit inputs. The Input Gains and offset parameters will need to be adjusted to have matched Sine/Cosine amplitudes with average values of zero. If these are the 11uA current type then a current to voltage amplifier would be needed.

    The ADC are sampled every 90us so the speed should not exceed one sine wave cycle every 4 x 90us.

    HTH
    Regards
    TK
    TK
    http://dynomotion.com

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