Arduino and G-Code

Hello all,
I am a student in mechanical engineering (mechanical design and production engineering),
I can not understand how the Arduino board understands the G-Code when we use it for a RepRap, how it can be able to output (HIGH) and (LOW) to a specific pin that we need to send the command (HIGH\LOW) to ,,
note: I am a beginner in RepRap and 3D printing and I don't know much things about this technology, also I am just in 1st year in my college.
Thanks, and sorry for my not very good English language

You should take a look at some arduino stepper motor control examples before diving into Gcode and 3d printers. Basicaly it is a combination of processing /interpreting a stream of textual information, doing some pretty complex calculations based on the information and then using the result of that computation to control motors and other outputs.
You shoul really start with some basic Arduino examples.

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[www.bonkers.de]
[merlin-hotend.de]
[www.hackerspace-ffm.de]

Download arduino IDE
Download marlin.

Read the marlin code.
Its all about code. If you speak code, it will be all easy to understand.

As i dont speak code. I dont understand.

I know objects are sliced into layers. These layers are given a X.Y.Z coordinate.
The arduino tell the ramps to move the stepper motor until they reach these coordinates.
Then the electronics comands plastic to extrude.

This happens layer by layer until you have an object.

It uses the processor of the arduino.
The shoots commands out of the many pins from the processor.

All these electronics amd pinouts are open-source.
Google them and look at the specs.

I've used an online viewer a few times and I quite like it, should work regardless of platform:
[gcode.ws]

/Andreas

thank you all,
I have a question, in all of a G-Code lines, I can not found any command that tells the Arduino that the x axis is for the pin (...), y for pin (..), z for (...),
so .... how the arduino know that it must move the stepper motor (or send a specific pulse) to a specific pin to move the extruder to the specific (x,y,z) location ....
this is the point that I can not understand it, and I can not know about any searching word I have to google it to get information about my question ...
and for a second time, I am sorry for my not good English language !

so what is the link between a G-Code and an Arduino ?

The firmware handles the translation. Download Marlin, look in configuration.h, you can tell it which set of electronics you have. If you have custom electronics, you can alter pins.h to define the pins for those electronics.

G-code is higher level, it deals with moving the machine in milimeters rather than flipping pins and counting steps.

Hello all,
I am a student in mechanical engineering (mechanical design and production engineering),
I can not understand how the Arduino board understands the G-Code when we use it for a RepRap, how it can be able to output (HIGH) and (LOW) to a specific pin that we need to send the command (HIGH\LOW) to ,,
note: I am a beginner in RepRap and 3D printing and I don't know much things about this technology, also I am just in 1st year in my college.
Thanks, and sorry for my not very good English language

Edited 1 time(s). Last edit at 10/19/2014 12:02PM by waseem salem el-mofty.

... the G-code is 'parsed' (or interpreted) by the software, so the specific code-parts are separated, identified and executed by separate routines for each code-type.

This HIGH/LOW-functionality is the core function of any controller - it's simply setting an output pin (selected by numbers) to the specified voltage level ... for higher currents, than the controller pins can drive, transistors or MOSFET's are used as subsequent current drivers ...

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Viktor
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Aufruf zum Projekt "Müll-freie Meere" - [reprap.org] -- Deutsche Facebook-Gruppe - [www.facebook.com]

Call for the project "garbage-free seas" - [reprap.org]

For a very simple example of switching a pin, see the "Blink" example coming with Arduino IDE. RepRap firmwares are quite a bit more sophisticated, though, usually the result of at least a full man-year of coding.

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Generation 7 Electronics	Teacup Firmware	RepRap DIY

... and please post only one thread for a specific question ... I've merged the two threads here in electronics ...

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Viktor
--------
Aufruf zum Projekt "Müll-freie Meere" - [reprap.org] -- Deutsche Facebook-Gruppe - [www.facebook.com]

Call for the project "garbage-free seas" - [reprap.org]

Disregard my reply above, it`s for a completely different thread. (weird, I'm positive I didn't post it to this one...)