The following MATLAB code is specifically used for DT9828 boards.

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The P201 series are single channel encoder interfaces suitable for use with a wide variety of 5V rotary and linear encoders. The USB versions allow encoders to be easily interfaced to and powered from a PC using only a USB cable. The new RS485 encoder interface (P201-9B-RS485) enables long distance, multidrop capability for SSI or BiSS C encoders.

Supported by PC based GUI Demonstration software and supplied with USB drivers that emulate a COM Port. Virtual COM Port access enables simple interfacing from LabVIEW, C#.Net, VB.Net, MATLAB.

More details can be referred to the data sheet of P201 interface.

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Table for stepper motor and lead screw

Item	Formula	Example Values	Calculation/Notes
Pitch of the Lead Screw	N/A	2 mm	The distance the nut moves per one screw revolution.
Steps Per Revolution (SPR)	N/A	200	Full steps required for the motor to turn one revolution.
Full Step Advance	Pitch / SPR	2 mm / 200	0.01 mm per full step.
Microstepping Factor (MfeS)	Set on the motor driver	64	64 microsteps per full step.
Advance Per Microstep	Full Step Advance / MfeS	0.01 mm / 64	Approximately 0.00015625 mm per microstep.
Pulses Per Revolution (PPR)	SPR * MfeS	200 * 64	12800 pulses for 64x microstepping.

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General Programming Tips

1. Compute the running time of a function all

   1	tic; fft(rand(500)); disp( [’it takes ’ num2str(toc) ’s.’] );

2. Locate the indice of minimum value in a matrice

   1 2	[M,I] = min(objMatrice(:)); % 'objMatrice' is the objective matrix [Irow,Icol] = ind2sub(size(objMatrice),I);

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I developed a stepper motor controller using a Pololu board and Arduino, designed to manage a stepper motor up to 4 A and read a single-end encoder. The system uses serial communction for interaction between the motor, encoder, and PC. That means you can even use MATLAB (with the example code shown below) to operate the motor and capture encoder counts.

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Stepper Motor and Encoder Wiring

Kalman Filter

有限元机翼动力学分析

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This is a MATLAB GUI code for an advanced calculator with multiple functions.

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