Acorn FAQs

Centroid offers a comprehensive Quick Start Guide that includes written instructions, component lists, and video tutorials for setting up your Acorn CNC system.

Yes. A full collection of manuals and support documents is available through the Centroid Community CNC Support Forum.

Download the guide Configuring Centroid Acorn for Sherline Lathes and Mills for step-by-step setup, including homing, axis travel, and input settings.

Yes. Manuals are board-specific.

• T-Series Lathe Operators Manual
• M-Series Mill Operators Manual

Yes. The Parameters screen allows access to over 500 adjustable values across five configuration tables.

• Acorn Parameter Instructions
• Parameter Settings Guide

A free version of CNC12 is included with every Acorn kit, but the “Pro” version is strongly recommended.

• Installation Instructions (PDF)
• Video Tutorial

Refer to this guide:
• Setting Axis Travel Limits Instructions (PDF)

Yes. Refer to this document outlining hardware and software requirements for a Windows 10/11 setup.

• What You Need to Supply (PDF)

The Signal Isolator Board enables Acorn to send voltage commands to the Sherline speed control based on programmed spindle RPM. It’s required when using Sherline’s Speed Control and delivers up to 10VDC.

• Wiring Instructions (PDF)

Acorn controls spindle RPM by converting G-code output into voltage, which is then sent to the Sherline speed control.

• Speed Control Integration Guide (PDF)

Refer to this document for installation instructions.

• Installing the Encoder on a Sherline Headstock (PDF)

The optional plug-and-play relay module supports external devices such as VFDs, solenoids, fans, lights, and pumps.

• Relay Module Information (PDF)

Wiring schematics for third-party integration can be found on the 9400 Acorn product page under the Specifications tab.

Acorn supports conversational programming and DXF import via Intercon.

• Full User Training Video
• Lathe Video Primer
• Mill Intercon Example

Follow the instructions in this guide:

• Live PLC I/O Display Instructions (PDF)

This is likely due to an encoder issue. Follow the instructions in the troubleshooting guide to confirm and resolve the problem.

• External Encoder Troubleshooting (PDF)

Begin diagnostics by accessing the Input Page in CNC12. This will help you identify and resolve signal or switch issues.

• Troubleshooting Guide (PDF)

Start with our Quick Start Reference, which covers all connection and setup steps specific to Sherline systems.