Urgent Need Help!

Discussion in 'Homework Help' started by Digit0001, Apr 30, 2010.

  1. Digit0001

    Thread Starter Member

    Mar 28, 2010
    89
    0
    Hi
    I don't understand how i can find the states from the timing diagram. I need to draw up a state diagram for a stepper motor. The lecturer explained how to read it, however i still don't understand.
    Here is the following image:

    [​IMG]

    Also this is the table i am suppose to fill in.
    [​IMG][​IMG]

    Hope someone can help me

    P.S
     
  2. bertus

    Administrator

    Apr 5, 2008
    15,638
    2,344
  3. PRS

    Well-Known Member

    Aug 24, 2008
    989
    35
    Complete a table using the timer relationships. There are four outputs 00, 01, 02, and 03 and these are stepped in one of two directions. The direction dictates the motor direction and can be read from the table. Start by filling in the table. Make the table correspond to the timing diagram. For example, in state S0 only line 00 is active. In state S1 only line 02 is on and so forth. This gives you a truth table.

    Also, take note of the enabling lines en, and cw. Unless en is high the outputs don't change. It appears two jk flip flops are being driven by each clock pulse and the logic you are to design in order to make them drive a stepper motor either forward or in reverse.
     
  4. Digit0001

    Thread Starter Member

    Mar 28, 2010
    89
    0
    So for the outputs column would it be like this:

    1000
    1000
    0001
    0001
    0010
    0010
    0010
    0010
    0100
    0100
    0010
    0010
    0001
    0001
    1000
    1000

    Would the state diagram look something like this?
    [​IMG]

    P.S
     
  5. PRS

    Well-Known Member

    Aug 24, 2008
    989
    35
    Hi, digit0001. I wish I could help you, but I've forgotten too much to be of any use. Perhaps someone else will jump in here and help?
     
    phaneendra27 likes this.
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