# Post Processors

### What a post processor does

A post processor is the final step between CAM and the machine.

CAM software calculates toolpaths in an abstract, machine-independent way.\
The post processor translates those toolpaths into **machine-specific G-code** that matches:

* the controller
* the kinematics
* the supported commands

In this documentation, CAM work is done in Autodesk Fusion, but the post processor defines how that work is turned into something the machine can actually execute.

***

### A note on 3-axis vs 5-axis post processors

There are different post processors used in this documentation, depending on the machine configuration.

The **3-axis post processor** is based on the standard Snapmaker-provided post processor, with only minor adjustments. 

The **5-axis post processor**, on the other hand, was developed largely from scratch and contains most of the exploratory and educational value.\
It reflects many iterations, tests, and design decisions made while working through indexed multi-axis workflows on the machine.

***

### Educational value of the post processor (5axis)

The post processor is intentionally **well commented**.

Wherever possible, logic and decisions are explained directly in the code so it can be read and understood — not just used. This makes the post processor itself a learning resource, especially for anyone interested in the internal structure and logic of post processors.

{% hint style="info" %}
You do not need to understand or modify the post processor to use it, but for those interested, it can serve as a valuable reference.\
You can read the **.cps file** with **common text editors**. Right-Click open with "YOUR TEXT EDITOR".\
I recommend using **Visual Studio Code** for this.
{% endhint %}


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