hello
I am currently making a device using H-Bot.
(Only the xy axis was used. not z and e axis!)
What i want is to stop at a specific coordinate.
I'm trying to make the xy axis move, Which part of the marlin firmware should I change?
Or, Is it better to make a completely new code?
Change lines 40 to 50 in the code You didn't post.
Marlin is CNC control firmware for, usually, 3D printers. It receives G code to control stepper motors, servo motors, heaters and fans.
If you only want to move the x and y axes, only send G code to control those axes.
Then you need to send Marlin the right Gcode to do what you want. I am not familiar with any software to send Gcode to Marlin except the slicer for my 3D printer. You can send individual commands from a serial port, but a protocol must be followed to stream Gcode commands from the serial port.
If you are using only 2 steppers, the CNC shield V3 (Uno) or CNC shield V4 (Nano) running Grbl may be a better fit. Still uses G code but simpler to setup and use. Plus there are free G code senders that you can use to control the setup. Universal Gcode sender is one and my favorite is bCNC.
thx for your answer.
i'll try.
but do i have to use CNC Shield?
(is it possible without CNC shield?)
i want to connect a4988(x2) to raspberrypi pico or Arduino uno(v3) directly.
You do not have to use the CNC shield to run Grbl. I like them because they make it convenient.
If you use Grbl without the CNC shield, Grbl expects the use of certain pins for functions. For example X axis step pin is pin 2, dir pin is pin 5. Below shows the Grbl pin mapping.
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