![]() I found few advantages of transistors over stepper drivers: Another assumption in this project was to use transistors instead of stepper motor driver. But I still wanted to make it so I designed a frame for it in Fusion360 (you can find image of it above). But while testing it I noticed that those motors are overheating a lot, and they are soooooo slow. Quite big part of code for this project was ready. I already developed reading and interpreting Gcode from SD card, rotating the motors according to Gcode and Bresenham's line algorithm. Most of the people use some open source firmwares for 3D printers but as you may know if you saw my Arduino based Ludwik drone project I like doing things from scratch and learning by that so I wanted to make my own code for this printer. So printer with those motors already exist but what I wanted to make different and more like my own way was code. There is also ToyRep, Cherry and probably much more that I don't know about. The first one is well known that's Micro by M3D, small and really beautiful 3D printer (I just love this simple design). And at that point you may say wait there is already 3D printer that uses those motors, yes I know there are even few of them actually. Of course I knew that it will be weaker and less accurate than standard stepper motors (when it comes to the accuracy it is not that simple, because most of the motors in 3D printers has 200 steps per revolution, and 28BYJ48 has about 2048 steps per revolution or even more depends on how you use them, but those motors are more likely to lose steps and gears inside them are not the best, so it's hard to say if they are more or less accurate). The biggest difference between 3D printer that I wanted to make and almost any other 3D printer was that instead of standard nema17 stepper motors it will use a cheap 28BYJ-48 motors that you can buy for about $1 (yes one dollar for a stepper motor). I wanted to make maybe a little bit similar thing but much more sophisticated - a 3D printer. You might ask why the story of fail if my project is working? Because at the beginning there wasn't a Dotter. ![]()
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