![]() ![]() the maximum current that the driver can send to the motor These two motor drivers are protected against overheating (within a certain limit obviously) but they have 2 big important differences: (Again I know that there is more reference of motor driver, more efficient with more advanced features etc. There are 2 references of motor driver which are very famous : The motor driver will receive the orders of speed, direction of rotation and position from the control electronics, in our case the Arduino then transform these orders into a series of electrical pulses which it will send to the motor. ![]() ![]() There is an electronic component that will manage for us the pulses to send to the motor. Now you think it's more complicated than expected to drive a stepper motor, but in fact not. By controlling the fréquency of pulses, we control their vitesse By controlling the number of pulses sent, we control their position So, to rotate them, you need to send them a series of pulses: To make them take a step, we must sent them an electrical impulse. This means that we can control their position to 360/200 = 1.8 ° close! In our case the Nema17 take 200 steps to make a complete turn. They perform a series of steps, to turn, which allows precise control of their speed, their direction of rotation and especially their position. The stepper motors are not conventional motors which are plugged into a power supply and which start to rotate as if by magic. These motors are used in 99% of 3D printer and desktop CNC that can be found almost everywhere on Amazon or other. Here is the type of assembly that the CNC Shield avoids:įor the motorization we will use Nema17 motors, which are stepper motors, 200 steps per revolution. it's very complicated to integrate neatly in a box because it takes up space and because of point 2) it must be well protected. it's not resistant neither to dust nor to vibrations, it's a blow to have short circuits everywhere. ![]() We could have done without CNC Shield, but already: But there, I will show you the main lines with simple material and without going into the detail of all the deep settings.įor the electronics that I am going to present to you, we will use an Arduino Uno card (on the left) which is simple to handle, equipped with a CNC Shield V3 from Protoneer (on the right): I know that there is more recent, more powerful material which allows more functionality etc. Small precision before starting, we will only see here the bases to make the electronics of its CNC. I invite you to watch it but you don't have to watch it to follow this article, I repeat all the steps. This article completes / resumes a YouTube video I made on this subject. Many of you have asked me how to make the electronics for your homemade CNC so this is what we will see in this article. ![]()
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