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Student CNC learning project: balancing scrap and speed

A project log from a student team learning toolpaths while meeting a tight deadline for aluminum brackets.

The Backyard Shop Team · 2024-07-22 · 1 min read

A local ag startup needed 30 aluminum brackets. The dimensions were straightforward, but it was the first multi-op job for two of our students. We treated it as a learning project with a clear timeline.

The initial plan

We scheduled two supervised sessions: one for CAM programming and one for machining. The supervisor insisted on a dry run with a 3D-printed mockup to confirm clearances.

Where we lost time

Tool changes took longer than expected because students were still learning our tool library. We adjusted the program to reduce tool swaps by combining operations, which saved 30 minutes per batch.

Inspection and delivery

First-article inspection found a chamfer mismatch on three parts. Instead of scrapping the batch, we reworked with a manual deburring fixture and logged the mistake in our internal training notes.

The takeaway

Students finished the job on time, and the client got accurate parts. The lesson: a small upfront investment in tooling templates saves hours later.

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