CNC Router

Our woodshop is home to a CAMaster Stinger I CNC router that is able to cut wood, plastics, and certain metals.

Certification
The CNC Basic Use & Safey class is a required certification to use this machine.

Reference Material
CAMaster Site

Feeds & Speeds Calculator

VCarve Pro CAD/CAM Software

CAMaster WinCNC Machine Controller Software

FCFL References
FCFL Bit Inventory

Getting Started
The CNC is one of our more dangerous pieces of equipment. It can be a VERY energetic machine and cause flying metal if improperly configured.

Safety
Standard Disclaimers:
 * Don't be inebriated
 * No loose items
 * Standard safety gear (safety glasses)
 * Tie back hair
 * Don't be stupid

You should sign up for a reservation on CiviCRM before using the tool

Operating the CNC


Before doing anything, know exactly where the Emergency Stop button is. It is the large red button on the front left side of the machine.

If you press it, you can confirm it worked by reading the code on the spindle rpm controller on the bottom right of the front of the machine which should be displaying 'ER'

You must fully power cycle the CNC and reset the switch (twist) to use the CNC

Creating The Cut Files
CAM jobs must use mm's.

Using VCarve Pro
We have a Vcarve Pro Makerspace license and you can use it to prepare VCarve files on your computer.

Pre-Check


Turn on the air compressor (push red toggle switch backward).

Warm Up Procedure


Note: Spindle RPM DRO in thousands of RPM

1. Remove collet from spindle and set aside.

2. Warm up spindle bearing using the speed control dial on front right of CNC router. This is required for the longevity of the spindle bearings.
 * Step 1: 5k RPM for 5 mins
 * Step 2: 10k RPM for 5 mins
 * Step 3: 18k RPM for 5 mins

Calibration
In CAMaster:

Securing the Piece
Spoilboard has 1/4”-20 threaded sockets for clamping and otherwise securing your piece.

The Cut


Spindle speeds typically 7k-18k rpm. Typical feedrate ~200ipm.

Calculate feedrate with this formula: Feedrate = (Chipload) x (Cutter Diameter) x (Number of Flutes) x (Spindle Speed)

Better to begin at lowest end of recommended feedrate and increase feed up to:
 * the finish deteriorates because of vibration of the cutting tool
 * tight radii causes the machine to adjust to a slower speed
 * the part moves

Upcut vs Downcut vs Compression Bits: To be written...

Turn on dust collector before cutting.

Spindle wont start
Hit reset button on spindle controller console. Check that speed control knob is fully clockwise

WinCNC Wont Start
Restart PC. Pray to whatever deity(ies) you may believe in