Why do not the 28byj-48 stepper motor drivers rotate on the plotter?

Question

Arduino

cnc plotter project on arduino. Components: 2 stepper motors 28byj-48 and servo motor sg-90. I do according to this scheme https://www.youtube.com/watch?v=k1vzT-T8LJA&t=342s . Arduino version 18.57.0. Grbl version: 0.9v as in the video. gcode created on inscape version 48.5. I send gcode to arduino using UGS of the latest versions.

The problem is the following: grbl is being flashed. And when sending a gcode image to Ugs, the stepper motor drivers don't work. Stepper motors are not broken drivers either. Perhaps the problem is due to the versions of grbl. But I tried to change grbl versions to others but it doesn't work either.

Answer 1

Only debugging will save you here. In front of you lies your board, in front of you is the code.
1. Maybe you mixed up the pins, in the code the signals are sent to some pins, but in fact the driver is connected to others. (check in the code, compare visually with what is on the board)
2. There may be a bad contact somewhere, stupidly something is not soldered. (check with a multimeter)
3. The pin on the arduino itself may have burned out. (check for example by connecting an LED)

Answer 2

If you repeat exactly this project, to which you indicated the link, then from the links there I see that the author uses his own grbl assembly (MIGRBL), designed to work with a specific CNC shield. Do you really have the same equipment? Why then do you write about using some different versions of grbl, and not the author's assembly?
If you are doing something your own, then why was there a link to that video at all? In this case, in addition to the hardware reasons listed by Sergey Vodakov , possibly incorrectly configured software is also added. Did you set up something in this very grbl - what kind of drivers are used, where are they connected, etc.? Does the original grbl have a servo on the z axis at all?

Answer 3

configure the GRBL outputs correctly so that they match where you connected the drivers. you can look at the config and connect the drivers where you need in a specific firmware

Answer 4

All the above respondents did not write the main thing: initially 28byj-48 are UNIPOLAR!!! , and on your video they are BIPOLAR !!!! . Have you redone them ? You also need to use a primitive sketch to check the operation of engines and drivers and only then move on towards GRBL