RLC2IC Incremental Magnetic Encoder sensor system

Discussion in 'The Projects Forum' started by ramana.madishetty, Aug 26, 2015.

  1. ramana.madishetty

    Thread Starter New Member

    Jun 11, 2014
    12
    0
    Hello,


    I was stuck at some counter part on Hardware.

    Am using LS7804 counter interface chip to drive up/down counters for RLC2IC Incremental Magnetic Encoder sensor system
    As my circuit works fine for counter increment when motor rotates in clockwise.
    But when the motor rotates in Anti-clock wise the decrement of counter not happens.

    Please view the schematic for the reference.

    Thanks.
     
  2. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,548
    2,373
    Are you using quadrature encoder pulses, i.e. one for count the other for direction?
    Max.
     
  3. AnalogKid

    Distinguished Member

    Aug 1, 2013
    4,539
    1,251
    Your schematic is almost impossible to read. There are industry standard symbols for the chips and transistors, with pinouts, that are necessary for any kind of analysis.

    ak
     
  4. ramana.madishetty

    Thread Starter New Member

    Jun 11, 2014
    12
    0
    Hi MaxHeadRoom,
    Thanks for reply.

    As am using
    quadrature encoder pulses only for count, the direction will be done from sensor side.
     
  5. ramana.madishetty

    Thread Starter New Member

    Jun 11, 2014
    12
    0
    thanks for the reply AK,

    I will get back with good schematic work.
    Atleast am expecting any schematic suggestions to how to read the sensor.

    Thanks
     
  6. MaxHeadRoom

    Expert

    Jul 18, 2013
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    Not only is the schematic not really legible, the methods you are using are not that obvious?
    Max.
     
  7. ramana.madishetty

    Thread Starter New Member

    Jun 11, 2014
    12
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    suggest me how can i read the RLC2IC sensor pulse output?
     
  8. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,548
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    The output shows RS422, so you would need an RS422 reciever IC, and then use the two quadrature pulses one for count, the other direction, this can be done in a μp, or the appropriate TTL logic to read the leading edge of each direction pulse, each opposite side will be a leading edge, depending on direction, and then simultaneously read the state of the direction pulse for either 0 or 1 to indicate direction.
    [​IMG]
    Max.
     
    ramana.madishetty likes this.
  9. ramana.madishetty

    Thread Starter New Member

    Jun 11, 2014
    12
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    Thanks for the idea Max.

    the above idea can be done with microcontrolller for sensing the direction of the rotary shaft.
    But how i need to acheive a higher resolution with quadrature encoders using MicroController?
     
  10. MaxHeadRoom

    Expert

    Jul 18, 2013
    10,548
    2,373
    The higher resolution is done by x2 or x4 and this is done by reading either two leading edges, one of each pulse (x2) or reading all four leading and trailing edges for x4.
    Max.
     
  11. ramana.madishetty

    Thread Starter New Member

    Jun 11, 2014
    12
    0
    Hi ,
    Wishes.


    Am unable to upload an image for reference in this forum?
     
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