How Many of You Have Done This? Common CNC Machining Mistakes Every Machinist Can Relate To

# How Many of You Have Done This? A CNC Machining Moment We Can All Relate To

If you’ve spent any amount of time in a machine shop, you know the feeling. That moment when you realize you’ve made a mistake that practically every CNC machinist has made at some point in their career. Donnie Hinske recently posted a video that has machinists everywhere nodding their heads in recognition, and it’s sparked a conversation that resonates across the entire CNC machining community.

## The Universal CNC Machining Experience

There’s something uniquely humbling about working with CNC machines. No matter how experienced you are — whether you’re a seasoned veteran with decades of shop time or a fresh operator just getting started — certain mistakes and mishaps are practically rites of passage. They’re the shared experiences that bond machinists together and create the kind of shop-floor stories that get retold for years.

Donnie’s video, simply titled *”How many of you have done this?”*, taps into that universal experience. It’s the kind of question that immediately makes you think back to your own moments in front of the machine — the crashes, the miscalculations, the “oh no” seconds that feel like an eternity.

## Why These Moments Matter

While it might seem like these shared blunders are just fodder for laughs and commiseration, they actually serve an important purpose in the machining community:

### 1. Learning Opportunities
Every mistake is a lesson. When machinists share their mishaps openly, it creates a learning environment where others can avoid making the same errors. The CNC machining community thrives on this kind of knowledge sharing.

### 2. Building Community
There’s comfort in knowing you’re not alone. When a fellow machinist raises their hand and says, “Yeah, I’ve done that too,” it breaks down the isolation that can come with working in a shop. It reminds us that even the best machinists in the world have had their share of rough days.

### 3. Promoting Humility
CNC machining demands precision, focus, and respect for the process. Acknowledging our mistakes keeps us humble and reminds us to never get complacent — no matter how many parts we’ve run or how many programs we’ve written.

## Common CNC Mistakes Every Machinist Has Made

While we won’t spoil exactly what Donnie’s video highlights, here are some of the most common “been there, done that” moments in CNC machining that practically everyone can relate to:

– **Forgetting to set the work offset** — Running a program only to realize the machine has no idea where the part actually is.
– **Crashing the tool into the workpiece or fixture** — That sickening sound of metal meeting metal in a way it definitely shouldn’t.
– **Running the wrong program** — Loading up the file for a completely different part and hitting cycle start with full confidence.
– **Leaving the chuck key in the chuck** — A classic manual machining mistake that can have dramatic consequences.
– **Not double-checking the tool length offset** — Leading to a tool that plunges way too deep or barely scratches the surface.
– **Forgetting to turn on the coolant** — Watching your tool heat up and your finish go from mirror to sandpaper in seconds.

Every single one of these mistakes has been made by thousands of machinists around the world. It’s part of the journey.

## The Importance of Sharing in the CNC Community

Creators like Donnie Hinske play a vital role in the machining community by keeping things real. In a world where social media often showcases only the perfect cuts, flawless finishes, and immaculate setups, it’s refreshing to see content that acknowledges the human side of machining.

These kinds of posts and videos remind us that behind every perfect part, there were probably a dozen learning moments, a few scrapped pieces, and at least one story that starts with, “You’re not going to believe what I did today…”

## Tips to Minimize Those “Oops” Moments

While mistakes are inevitable, here are some best practices to help reduce their frequency:

– **Always dry run your program first** — Step through the code or run it in graphics mode before cutting metal.
– **Double-check your offsets** — Work offsets and tool length offsets should be verified before every job.
– **Use a setup sheet** — Document everything so you have a reference to check against.
– **Slow down on the first part** — Use feed rate and rapid overrides to maintain control during the first run.
– **Stay focused** — Distractions are the enemy of precision. Give the machine your full attention during critical operations.

## Watch the Video

If you haven’t already, check out Donnie Hinske’s video and see if you recognize yourself in it. Chances are, you’ll be raising your hand along with thousands of other machinists.

👉 [Watch “How many of you have done this?” on YouTube](https://www.youtube.com/watch?v=NdY8zWruT1o)

Drop a comment and let the community know — have you done this? You’re definitely not alone.

## Final Thoughts

CNC machining is a craft that demands continuous learning, attention to detail, and a healthy dose of humility. The mistakes we make along the way aren’t just embarrassing anecdotes — they’re the building blocks of expertise. So the next time you have one of those moments, remember: every machinist who came before you has been there too.

Keep making chips, keep learning, and keep sharing those stories. That’s what makes this community great.