User manual

F1 LV Evaluation Platform Motor Control Add-Ons
DS41629A-page 42  2012 Microchip Technology Inc.
5.1.4 Reference Documents
This section points you to application technical support.
AN907, ”Stepping Motors Fundamentals”
AN906, ”Stepper Motor Control Using the PIC16F684”
AN822, ”Stepper Motor Microstepping with PIC18C452”
AN1307, ”Stepper Motor Control with dsPIC
®
DSCs”
You can obtain these reference documents from your nearest Microchip sales office
(listed in the last page of this document) or by downloading them from the Microchip
web site.
5.2 GETTING STARTED
A step-by-step connecting procedure is available in Section 1.4.3 “Connecting the
F1 LV Evaluation Platform to the Add-on Board”. Please make sure that POT R4
on the F1 Evaluation Platform is turned fully CCW.
If using a different motor, connected through J3, please keep in mind to attach each
motor phase firmly to the connector. Bad contacts can damage the add-on and, in time,
will wear out the motor. There is no rule for attaching a specific motor lead to a phase
line on the add-on. Keep in mind the correspondences on the software side when
testing or measuring directly on that motor phase.
On the F1 LV Evaluation Platform use push button RD2 to step through the application
menu on the LCD display. To have more control over the motor using a real-time
communication tool, please refer to the next section.
5.3 HARDWARE
5.3.1 General Architecture
The unipolar stepper add-on uses a simple unipolar stepper drive formed by four
independent N-type MOSFETs suitable for two-phase unipolar stepper motors.
Open-loop control, closed-loop control, full step, half step, microstepping commutation
can be done in the software.
Figure 5-1 provides a simplified block diagram of the development board hardware,
coupled to the F1 LV Evaluation Platform:
WARNING
The Unipolar Motor Control Add-on Board is intended to drive 3-phased unipolar step-
per motors. Before connecting the motor, make sure the power rating of the motor is
equal to or less than the power rating of the board, as shown in Appendix
B. “Conversion Factors”. Also, make sure the configuration parameters inside the soft-
ware or the GUI are correct for the motor you are using. Failure to comply with this
warning could lead to malfunction of the board and the motor, and could result in phys-
ical harm.
Before beginning the start-up procedure, complete a visual check of the board and the
motor for connectivity and mechanical damage. If damage is found, DO NOT power-up
the board. Otherwise, you may further damage the equipment. Contact Microchip’s
local office or distributor immediately.