CNC Workshop
Practical CNC guides built from real support questions and hands-on experience. Explore spindle selection, controller compatibility, troubleshooting, upgrades, maintenance, and more from the PwnCNC team.
ER11 vs. ER20 CNC Spindles: Tool Sizes, Collets, and Real-World Limits
ER11 handles the 1/8- and 1/4-inch tools used by many CNC owners, while ER20 expands your options to common 3/8-...
65mm vs. 80mm CNC Spindles: Mounting, Clearance, and Power Differences
A smaller spindle does not always provide better clearance. Learn how 65mm and 80mm CNC spindles differ in mounting, tool...
1.5 kW vs. 2.2 kW CNC Spindles: Which One Is Right for Your Machine?
A 2.2 kW spindle is not automatically the better choice. Compare voltage, machine rigidity, mount size, Z-axis capacity, tooling, and...
Can You Add an ATC to Any CNC Router? Compatibility Requirements Explained
Many CNC routers can be converted to automatic tool changing, but the spindle is only one part of the system....
How Much Air Does an ATC Spindle Need? Compressor Size, PSI, and Airflow Explained
Does an ATC spindle require a large compressor? Learn how pressure, airflow, tank size, filtration, and pneumatic accessories affect a...
What Do You Need for a Complete CNC ATC Spindle Installation?
A CNC ATC spindle cannot change tools by itself. A complete installation also needs the right VFD, controller workflow, pneumatics,...
PWM vs. Modbus: Which CNC Spindle Control Method Should You Use?
PWM and Modbus can both provide automatic CNC spindle control, but they work very differently. Learn which method fits your...
Why Does My CNC Spindle Work in Manual Mode but Not Automatically?
A spindle that runs from the VFD keypad but not from the CNC controller is usually pointing to a problem...
