Paid VS Free
CNC Software
What is best for me?
Who wouldn’t appreciate access to free software…but is free always the best option?
It may seem unusual to begin with this question, but it is an important one to consider seriously. As the saying goes, “There’s no such thing as a free lunch.”
In practice, you will likely spend more time working within your CAD and CAM software than operating your CNC machine itself. For that reason, selecting the right software is a critical decision.
In some cases, free software provides exceptional value with few or no compromises. In others, however, choosing a free solution can lead to significant limitations, reduced productivity, and unnecessary frustration. The time spent working around missing features or inefficient workflows may ultimately outweigh the cost savings. In many situations, investing in a reasonably priced commercial package can deliver a far better long-term experience.
It is also important to consider the learning curve. CAD and CAM platforms require a substantial investment of time to master. If you later discover that the software does not meet your needs and decide to switch platforms, much of that learning investment may be lost.
What Makes CNC Router Software Different?
Most CNC software can technically be used with a CNC router, but that does not necessarily mean it is the best fit.
Effective CNC router software is designed specifically around the strengths, capabilities, and typical applications of CNC routers and their users. Compared with traditional CNC milling machines, CNC routers are generally optimized for different types of work:
- CNC routers are designed to process large, flat work areas with relatively limited vertical travel.
- They are commonly used with softer materials such as wood, plastics, and softer metals like aluminum or brass.
- Routers typically prioritize speed, flexibility, and creative or artistic applications over the ultra-high precision commonly associated with CNC milling machines used for metal parts.
CabBuilder is particularly well suited for CNC router applications and represents some of the best CNC software available for router users.
CNC Control Software
Your CNC router operates using G-code, a specialized programming language used to control CNC routers, milling machines, and other CNC equipment.
CNC control software is responsible for transferring G-code programs to the machine and instructing the CNC router when to execute those programs.
In addition to program execution, control software also provides manual machine operation features. For example, most platforms support jogging functions, allowing the operator to move the machine incrementally using keyboard controls or an external controller.
Because it serves as the primary interface between the operator and the machine, becoming highly familiar with your CNC control software is essential.
Many entry-level CNC routers are based on the GRBL control system, which uses a GRBL-compatible dialect of G-code.
A well-known example of GRBL-based control software is Carbide Motion, the free control platform commonly used with the Shapeoko CNC Router product line.
The following video provides a useful overview of how Carbide Motion operates.
CNC Utility Software
Feeds and Speeds Calculators
One of the most important aspects of CNC machining is selecting the proper feeds and speeds for your cutting operations.
- Feed rate refers to how quickly the cutting tool moves through the material, typically measured in inches per minute (IPM).
- Spindle speed refers to how fast the cutter rotates, measured in revolutions per minute (RPM).
Incorrect feeds and speeds can significantly reduce tool life, negatively impact surface finish, and lower machining efficiency. Interestingly, operating too slowly can be just as damaging as running too aggressively.
Because feeds and speeds are among the most challenging concepts for many CNC users to master, a dedicated calculator can be extremely valuable. Tools such as G-Wizard help simplify this process by recommending optimized cutting parameters.
While several feeds and speeds calculators are available, G-Wizard includes a number of features specifically designed for CNC router applications, including:
- A material database containing hundreds of wood species
- Support for specialized CNC router bits such as downcut, compression, and straight flute cutters
- Router-specific utilities, including a vacuum table part pop-off calculator
A free 30-day trial is also available for users who wish to evaluate the software.
G-Code Sender Software
In some CNC control systems, G-code sender functionality is integrated directly into the control software itself. For example, Carbide Motion includes built-in G-code transfer capabilities.
In other setups, however, a separate G-code sender utility may be required to transmit files to the CNC machine through a USB connection. In many cases, this utility is included with the CNC router or controller hardware.
For DIY CNC systems, GRBL-based controllers and other standalone hardware controllers typically include compatible G-code sender software as part of the package.
Creativity is fueled by precision. The relationship between art and engineering is undeniable... CNC machines bridge this gap and allow for endless design possibilities.
— Woodworking Bloggers —