Electronics Projects, Pic16f628 Bipolar Stepper Motor Driver Circuit LMD18245 article
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One bipolar stepper motor drive circuit PIC16F628 2 lmd18245 (3 amps 55volt) hyperlinked integrated motor drive is used. The author is talking about is using CNC milling project. The project’s source code (micropascal) and PCBs have drawings.
LMD18245 Motor Driver Circuit
Back in the early days of construction CNC milling machine I originally thought of as a unipolar motor performance elements for feed drives . But over time I realized that a unipolar motor options are very limited and their only advantage is that their control is easier .
Taxes for simplicity Drivers are , but worse dynamic parameters ai options výkonnové when u bipolar motor can usually choose whether to sort winding serially or in parallel . Bipolar motor contrast, requires 2p H bridge and is therefore more difficult to design and control .
Fortunately, it is possible to buy LMD18245 circuit from National Semiconductor, which is already complete control of single phase bip . motor. Includes 4 inputs for the DA converter, which determine the current flow , input for the direction and the ability to set PWM control . Maximum continuous current is 3A at a voltage of 55V . The price is not exactly folk , but on the other hand 470Kč for this IO saves a lot of problems.
Since I am by nature lenivej first person I was looking for something usable on the Internet and I came across PICstep project , which was exactly what I needed. I added a schema of jumpers, which I naswitchovat required current, which is an advantage if you do not have the same engines feeds .
Source: j.mp/b46KLH Pic16f628 Bipolar Stepper Motor Driver Alternative link: bipolar-step-motor-surucu-pic16f628-lmd18245.rar