Choosing the Ideal CNC Machine: A Practical Guide

There are a wide-range of types and manufacturers of CNC machines.  When shopping for a new or used CNC there are a number of key characteristics to pay attention to.  Here are some of the most important:

Number of Axes

This is the most fundamental quality of any CNC machine.  In most basic designs, the cutting head moves in three directions – X, Y, and Z – and the tool itself always points down, aligned with the Z axis. This design presents some limitations compared to multi-directional machines containing a fourth axis.

Mechanical Movement Ranges

Greater tool movement ranges allow for the ability to create a larger part in a single pass.  To determine the size of the machine you’ll need, consider the maximum size of the largest individual part of what you’re trying to create.

Use of a Specialized Spindle

The spindle that connects the motor and the rotating tool has a large impact on the accuracy of the CNC machine.  Its primary roll is to ensure that the rotation of the tool is highly concentric with minimal vibration and that it stays this way under load.  A higher quality spindle will increase precision by decreasing the total amount of back and forth wobble, the difference between the intended and the actual diameter of the tool.

Movement Speeds

There are a lot of factors that contribute the amount of time needed to complete a job, but the final factor in the equation is always the performance of the CNC machine itself.  While it might seem like you would want to go with the highest maximum speed, there are downsides to this option.  Do your research carefully and choose a machine that will fit your needs.

Tramar Industries is the leading supplier of new and used CNC machines.  With their huge selection of CNC machines you’re sure to find the one that fits your needs.  For more information about CNC machines, or to find a specific machine, contact Tramar Industries today!