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Texas Instruments DRV8811EVM manual

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Table of contents for the manual

  • Page 1

    DRV8811EVM User's Guide Literature Number: SLVA344A July 2009 – Revised September 2009[...]

  • Page 2

    2 SLVA344A – July 2009 – Revised September 2009 Submit Documentation Feedback[...]

  • Page 3

    Contents 1 Introduction ......................................................................................................................... 6 1.1 Block Diagram ............................................................................................................. 6 1.2 Power Connectors ...................................................[...]

  • Page 4

    www.ti.com List of Figures 1 VREF SELECT Jumper ..................................................................................................... 7 2 DECAY SELECT Jumper ................................................................................................... 7 3 DRV8811_RD_EVM_R1p0.exe Main Screen ....................................[...]

  • Page 5

    User's Guide SLVA344A – July 2009 – Revised September 2009 Laser and Motor Drives This document is provided as a supplement to the DRV8811 datasheet. It details the hardware implementation of the DRV8811 customer evaluation module (EVM). SLVA344A – July 2009 – Revised September 2009 Laser and Motor Drives 5 Submit Documentation Feedbac[...]

  • Page 6

    1 Introduction 1.1 Block Diagram V M P ow er T est S ta ke s D R V 88 1 1 M ot o r Ou tp ut s M S P 4 3 0 F 1 61 2 U S B 1.2 Power Connectors Introduction www.ti.com The DRV8811_RD customer EVM is the complete solution to evaluating the DRV8811 microstepping bipolar stepper driver. It houses a USB link to provide easy control from a PC computer, an[...]

  • Page 7

    1.3 Test Stakes 1.4 Jumpers 1.4.1 VREF SELECT (JP1) Jumper (a) (b) PO T INT PO T INT 1.4.2 DECAY SELECT (JP6) Jumper (a) (b) PO T INT PO T INT 1.5 Motor Outputs 2 Installing Drivers And Software 2.1 Installing the FTDI USB Driver www.ti.com Installing Drivers And Software Every pin on the device has been brought out to a test stake. A label on the [...]

  • Page 8

    2.2 Installing the DRV8811 Evaluation Board Windows Application Software 2.3 Running the Windows Application Software 3 Windows Application Windows Application www.ti.com The included CD contains a folder titled “Windows Application”. It is recommended for the contents of this folder to be copied to any desired folder on the computer. The reaso[...]

  • Page 9

    3.1 Menu 3.2 DRV8811 GPIO Control Signals www.ti.com Windows Application The menu at the top of the application offers a series of quick options for how the COM port is to behave. 1. File → Exit - Terminates the application 2. Settings → Port - Selects from COM1 to COM4. Default is COM4. The serial port's actual port number defaults to wha[...]

  • Page 10

    3.3 Updating DAC Output for Current Control (VREF/DECAY) VREF=DAC_V ALUE · 2.5 V ¾ 4095 (1) 3.4 Updating DAC Output for Decay Control (DECAY) DECA Y=DAC_V ALUE · 2.5 V ¾ 4095 (2) 3.5 Operating the Stepper Motor 3.5.1 Turning the Stepper Motor Windows Application www.ti.com A checked checkbox translates to a HI level on the respectiv[...]

  • Page 11

    T i m e B a s e Acc el Ra t e P u l s e s P er S e c o n d www.ti.com Windows Application The DRV8811_RD customer EVM allows for the possibility of coordinating step rates such that accelerating and decelerating profiles are achieved. Both acceleration and deceleration are controlled by the same parameters, acceleration rate and time base. When the[...]

  • Page 12

    3.5.2 Step by Step control 4 Schematic Schematic www.ti.com Pressing the Start Steps button, will start the timer and pulses will be generated at the rate specified by the decimal number at the PPS text box. Once the Start Steps button is pressed it becomes the Stepping button. Press the Stepping button to stop the stepper motion. When the motor is[...]

  • Page 13

    IMPORTANT NOTICE Texas Instruments Incorporated and its subsidiaries (TI) reserve the right to make corrections, modifications, enhancements, improvements, and other changes to its products and services at any time and to discontinue any product or service without notice. Customers should obtain the latest relevant information before placing orders[...]