User manual

F1 LV Evaluation Platform Motor Control Add-Ons
DS41629A-page 34  2012 Microchip Technology Inc.
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.
4.3 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 terminal firmly to the connector. Bad contacts can damage the add-on and will
wear out the motor in time. 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 com-
munication tool, please refer to the next section.
4.4 HARDWARE
4.4.1 General Architecture
The bipolar stepper add-on uses a simple bipolar stepper drive formed by four indepen-
dent N-type MOSFETs suitable for two-phase bipolar stepper motors. Open-loop con-
trol, closed-loop control, full step, half step, microstepping commutation can be done in
the software.
Figure 4-1 provides a simplified block diagram of the development board hardware,
coupled to the F1 LV Evaluation Platform:
WARNING
The Bipolar Motor Control Add-on Board is intended to drive two-phase bipolar stepper
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 software 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 physical 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.