CNC Mill
Summary
The CNC Mill is a single-phase CNC milling machine that Sean Hodgins acquires in the episode "Step 1: Buy a CNC Machine" as a practical solution to manufacturing limitations in his current shop. The machine represents a significant shift in Sean Hodgins's equipment strategy, chosen specifically because it can run on single-phase power—a critical requirement after moving to a space where his three-phase machines sit idle in what he describes as "a bit of a graveyard in the shop." The mill features an automated tool changer, a tool height setter for automated setup, and way oil lubrication, though its arrival comes with multiple technical challenges that require systematic troubleshooting and extensive cleaning before it can produce the M.O.R.E. Tokens that justify its purchase.
Details
The acquisition process for the CNC mill involves careful consideration of practical constraints. As Sean Hodgins explains, there are essential questions when buying such equipment: "One, do you need it? This one's easy. The answer is always yes, but it doesn't hurt to ask. Two, can I power it?" The power requirement becomes the decisive factor—the machine's single-phase electrical needs make it viable where his existing three-phase equipment cannot function.
Physical logistics also play a role in the decision. The machine must fit through a 7-foot garage door, and Sean Hodgins works with James (Hacksmith) to arrange delivery. The Hacksmith's involvement extends beyond simple transport; the episode includes promotion of the Smith Blade product available through the Hacksmith store.
Upon arrival, the mill presents multiple issues requiring resolution:
- E-stop malfunction: The primary emergency stop button is faulty, necessitating connection of an alternate pendant to operate the machine safely
- Pneumatic system failure: A broken pneumatic line in the tool changer system requires repair
- Contamination: Extensive metal chips accumulated throughout the enclosure from previous use
- Coolant problems: Low coolant levels and multiple leaks from loose bolts around the enclosure panels
Sean Hodgins's approach to these problems is methodical and exhaustive. His commitment to cleaning is captured in his declaration: "I will get every last chip out of here." After systematically addressing each issue—repairing the pneumatic line, tightening loose bolts to stop coolant leaks, refilling the coolant reservoir, and thoroughly cleaning the enclosure—the machine becomes operational. His excitement at this achievement is evident when he simply states: "It's alive."
The mill's first production run validates the investment. Using custom soft jaws Sean Hodgins created to hold hex bar stock, the machine successfully produces precise hex-shaped M.O.R.E. Tokens in approximately 30 minutes of machine time, demonstrating both the mill's capabilities and Sean Hodgins's ability to integrate it into his production workflow.
History
Step 1: Buy a CNC Machine
The CNC mill is the central focus of this episode, documenting its acquisition, troubleshooting, setup, and first successful production run. Sean Hodgins receives delivery of the machine with assistance from James (Hacksmith), chosen specifically because it operates on single-phase power—a critical requirement given that his move to the current shop has left his three-phase machines unusable.
The machine arrives with several significant problems. The E-stop button is faulty, requiring Sean Hodgins to connect an alternate pendant for safe operation. A pneumatic line in the tool changer system is broken and needs repair. The enclosure is filled with metal chips from previous use, prompting an extensive cleaning effort. The coolant system has multiple issues: low fluid levels and leaks from loose bolts around the panels.
Sean Hodgins systematically addresses each problem, tightening bolts, refilling coolant, repairing the pneumatic system, and methodically cleaning every chip from the enclosure. After completing these repairs and setup procedures, the mill successfully completes its first production run, creating hex-shaped M.O.R.E. Tokens in approximately 30 minutes using custom soft jaws designed to hold hex bar stock. The successful operation demonstrates that the single-phase mill can effectively replace the functionality Sean Hodgins lost when his three-phase equipment became unusable in the current shop.