dsPICDEM MCSM Development Board
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The document introduces the dsPICDEM MCSM Development Board, which is used to develop stepper motor control applications using Microchip's dsPIC33FJ32MC204 digital signal controller. The board includes interfaces for controlling two motors, inputs/outputs, communication ports, and power supplies. It also includes a Leadshine stepping motor and provides various motor control modes like full step, half step, and microstepping down to 1/64 steps. The board setup involves connecting the motor, power supply, and programming the dsPIC microcontroller to run motor control algorithms.
dsPICDEM MCSM Development Board
- 1. dsPICDEM MCSM Development Board Source: Microchip Technology
- 2. Introduction Purpose To Introduce Stepper Motor Development Board using dsPICDEM: DV330021 Outline Microchip Motor control solution, DV3300221 Board Details Kit Content and features Board Block Diagram of Board, Features of dsPIC33FJ32MC204 Switching Topology , Microstep Generation, User Interface Hardware Leadshine Stepping Motor (P/N 42HS03) , Board Setup and Run Content 15 pages
- 3. Microchip’s Motor Control Solutions ■ 8 and 16-bit microcontrollers and digital signal controllers ■ MOSFET gate drivers ■ Analog and Interface products ■ Motor control development tools and reference design hardware ■ Motor control algorithms and software
- 4. dsPICDEM MCSM Development Board
- 5. dsPICDEM MCSM Kit Contents dsPICDEM MCSM Development Board dsPIC33FJ32MC204 Plug-In-Module (PIM) USB-to-mini-USB cable Screwdriver 24V Power Supply Leadshine Stepping Motor (P/N 42HS03)
- 6. Features of dsPICDEM Board • Motor control interfaces: Two full-bridge inverters Two phase current sense resistors DC bus voltage sense resistor Overcurrent protection • Input/output control switches: One push button (S1) Reset push button (RESET) 10 kΩ potentiometer (POT) LED indicators for PWM outputs arranged in a full-bridge format LED indicator for overcurrent • Communication Ports: UART communication via USB (J4) • Built-in power supplies 15V power supply, maximum power available 11 W 3.3V power supply, maximum power available 2 W • Programming Connectors: ICSP™ connector for programming a dsPIC DSC device (J2) RJ11 connector for programming a dsPIC DSC device (J1) ICSP connector for programming the PIC18LF2450 USB-to-UART Bridge (J3)
- 7. dsPICDEM MCSM Development Board Block Diagram
- 8. Features of dsPIC33FJ32MC204
- 9. Switching Topology Driving the high PWM pins active will run the current through a motor winding in one direction Driving the low PWM pins active will run the current through the winding in the opposite direction By using this topology all decay modes for the winding current can be achieved
- 10. Microstep Generation The ideal waveform for driving a stepper motor winding is a sine wave The motor inductance and drive voltage play a key role Lowering the motor inductance value or increasing the drive voltage will give a better resolution to smaller microsteps. Full Step Mode (1/1 Step), Half Step Mode (1/2 Step), Microstepping- 1/4 Step - 1/8 Step - 1/16 Step - 1/32 Step - 1/64 Step
- 11. User Interface Hardware The dsPICDEM MCSM Development Board consists of the following push buttons, LEDs and potentiometers: • One push button • One potentiometer • Eight PWM LEDs • One power-on status LED • Two USB LEDs • One Fault LED • Device Reset push button
- 12. Leadshine Stepping Motor (P/N 42HS03) Step Angle 1.8° Step Angle Accuracy +5%(full step, no load) Temperature Rise 80°CMax Ambient Temperature -10°C -- +50°C Insulation Resistance 100MΩmin.500VDC Dielectric Strength 500VAC for one minute Shaft Radial Play 0.06 Max.(450g-load) Shaft Axial Play 0.08 max.(450g-load) Number of Leads 8 except 42HS04 (4 leads)
- 14. Board Setup and Run Place the dsPICDEM MCSM Development Board on a study insulated platform. Make sure that the dsPIC33FJ32MC204 device or an appropriate PIM is mounted in the respective socket. Connect the stepper motor (42HS03) to J8. Connect the motor phases in a bipolar series connection. Connect the 24V power supply to J6. Press S1 to run the motor. Vary the motor’s speed with the potentiometer. Press S1 to switch to full-step wave mode, full-step, half-step and various microstepping modes. Pushing S1 after the 256th microstep step setting stops the motor. Press S1 again to repeat the cycle.
- 15. Additional Resource For ordering DV330021, please click the part list or Call our sales hotline For more product information go to Click Visit element14 to post your question www.element-14.com For additional inquires contact our technical service hotline or even use our “Live Technical Chat” online facility
Editor's Notes
- #2: Welcome to the training module on dsPICDEM MCSM Development Board
- #3: This training module will be an introduction to a Stepper Motor Development Board using dsPICDEM .
- #4: Microchip provides everything a motor control design engineer needs: low-risk product development, lower total system cost, faster time to market, outstanding technical support and dependable delivery and quality.
- #5: This kit includes the dsPICDEM MCSM Development Board, Stepper Motor, Power Supply, and Plug-in Module (PIM). The hardware topology is very simple; consisting of just the dsPIC® DSC, the drivers and two H bridges. Each MOSFET in the dual H-bridge is controlled by one PWM signal. The powerful PWM module of the dsPIC DSC features independent or complementary control over each of the four PWM pairs, plus an additional override function on each pin, which gives even more control over the power MOSFETs.
- #6: The Microchip dsPICDEM MCSM Development Board is a cost-effective tool for creating unipolar and bipolar stepper motor applications. The board enables the rapid development of both open-loop and current-closed-loop micro-stepping routines using Microchip’s dsPIC33 Motor Control families. This development tool also provides engineers with a control GUI, which allows them to focus on integrating the other application features and fine-tuning the motor’s operation.
- #7: The dsPICDEM board comes with a motor control interface; which has 2-full bridge inverter, 2-phase current sense resistorx, over-current protection, input-output control switches and UART communication port through USB. The device also has built in power supplies, ICSP connector for programming DS pics and RJ-11 connector for programming other devices.
- #8: The dsPIC® DSC devices feature an 8-channel, high-speed PWM with Complementary mode output, a programmable ADC trigger on the PWM reload cycle, digital dead time control, internal shoot-through protection and hardware fault shutdown. These features make the dsPIC DSC an ideal solution for high-performance stepper motor control applications where full control of the full-bridge inverter is required.
- #9: 16-bit Motor Control family dsPIC33F Digital Signal Controller in low-pin count packages featuring 2 PWM generators with independent time bases and the new Peripheral Pin Select capability. Seamless migration options from and to the PIC24F, PIC24H, dsPIC30F & dsPIC33F product families for this device. The dsPIC33FJ32MC202/204 and dsPIC33FJ16MC304 CPU module has a 16-bit (data) modified Harvard architecture with an enhanced instruction set, including significant support for DSP. The CPU has a 24-bit instruction word with a variable length opcode field. The Program Counter (PC) is 23 bits wide and addresses up to 4M x 24 bits of user program memory space.
- #10: Driving a stepper motor in a full-bridge topology requires switching the opposite diagonal MOSFETs on and off at the same time in order to reverse the drive current and to accommodate all possible decay modes. Since all PWMxHx pins are on at the same time (for example, PWM1H1 and PWM1H2), it is not possible to drive all of the high-side MOSFETs with the PWMxHx signals
- #11: All stepping modes are derived from the sinusoidal mode by adjusting the granularity of the driving sine wave. A full step is the largest step and it consists of 90 degrees of one sine wave period. A half step represents half of that and so on. Microstepping is used to increase the rotor position resolution and to reduce vibration and noise in motor operation
- #12: This page gives information for user interface hardware which includes one push button, one potentiometer, 8 PWM led’s, one power on led, 2 usb led, one fault led, device reset push button
- #13: The board comes along with Leadshine 2 phase step motor with 1.8 deg step angle. It can be connected in series , parallel and unipolar. Its max phase current is 1.4A
- #14: The stepper motor used for the demonstration is the Leadshine Stepping Motor (P/N 42HS03). Again, it can be connected in different configuration like Bipolar parallel, Bipolar half-winding, unipolar
- #15: This page gives step wise procedure for Board Setup and to demonstrate stepper motor working in Bipolar mode. Operating the dsPICDEM MCSM Development Board using the on-board POT and switch button cannot offer the flexibility required in most applications
- #16: Thank you for taking the time to view this presentation on “ [ dsPICDEM MCSM Development Board ]” . If you would like to learn more or go on to purchase some of these devices, you may either click on the part list link right beside the play button on the TechCast portal, or simply call our sales hotline. For more technical information you may either visit the [Microchip Technology] site, or if you would prefer to speak to someone live, please call our hotline number, or even use our ‘live chat’ online facility. You may visit element14 e-community to post your questions.