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BS2 connected to Driver BLEW — Parallax Forums

BS2 connected to Driver BLEW

blacksheep45blacksheep45 Posts: 41
edited 2009-06-15 14:26 in BASIC Stamp
a Basic Stamp 2 connected to a ST10-Q driver chip which is connected to a stepper motor, as is shown in the diagram attached.
The Stamp is being used on a Proffesional Development Board, this is where the button is from. Also the Driver has a different power supply from the stamp as it needs 48V, 4.5A to drive the motor.
X3 and X4 are the Inputs for the Driver and Y2 is the Output From the Driver.
Can anyone help me in finding out why this circuit blew my BS2.

Kind Regards

Shaun
bmp
bmp
BS2_Driver_Motor.bmp
353K

Comments

  • blacksheep45blacksheep45 Posts: 41
    edited 2009-06-12 15:30
    Hello Again,



    Just made a small correction to the diagram, as I noticed that I had the Vin Pin connected up instead of the Vdd Pin. Also I numbered the Pins used so they are easier to see.



    Kind Regards



    Shaun
  • Mike GreenMike Green Posts: 23,101
    edited 2009-06-12 15:59
    You would need to provide a datasheet for the driver chip.

    Your diagram is still hard to read. Perhaps you could separate some of the wires so it's easier to see where each one goes.
  • blacksheep45blacksheep45 Posts: 41
    edited 2009-06-12 16:49
    The info for the driver chip can be found at:

    http://www.applied-motion.com/ST/

    Sorry I cannot be of more use at the moment but I am just getting ready to leave work at the moment so I do not have time to make the diagram clearer but i will do this later on.



    Kind Regards



    Shaun
  • Beau SchwabeBeau Schwabe Posts: 6,559
    edited 2009-06-12 18:07
    blacksheep45,

    Someone else will probably point this out, but it looks like X2 is the only 5V input... X3 and X4 appear to be 12V inputs.

    Without the Stamp connected to X3 and X4, can you take a voltage measurement on those two inputs with respect to GND and/or Xcom and Ycom and report those readings back to us?

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    Beau Schwabe

    IC Layout Engineer
    Parallax, Inc.
  • FranklinFranklin Posts: 4,747
    edited 2009-06-12 21:24
    Looks like you should be using x1 and x2 instead. also you have xcom to v+ on the stamp?

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    - Stephen
  • blacksheep45blacksheep45 Posts: 41
    edited 2009-06-15 10:52
    Hi Guys,



    Sorry, I never noticed that I didn't attach the diagram on my second post so here it is now.

    Also the readings on X3 and X4 without being connected to the stamp are:

    Gnd to X3 & X4 = 0.012V

    Xcom to X3 & X4 = 0.044V
    bmp
    bmp
    BS2_Driver_Motor.bmp
    353K
  • Beau SchwabeBeau Schwabe Posts: 6,559
    edited 2009-06-15 14:26
    blacksheep45,

    Those values almost seem like a short... I would expect values of 0.6V to 0.4V for the LOW end on an input and as HIGH as Vsupply minus 0.6V to 0.4V

    Can you take another measurement with a pull-up resistor of say 1K or so, and include X1 and X2?

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    Beau Schwabe

    IC Layout Engineer
    Parallax, Inc.
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