The Story

I Couldn't Stand At My Machine Anymore.
Turns Out I Didn't Need To.

Joshua Harezlak · Founder · Loves Park, Illinois · May 2026
49 Years Old
14+ Years Machining
$100 Total Build Cost
16 Post Processors

Machines Have Always Been My Language.

I am 49 years old. I have no coding background. I built a live, revenue-ready AI-powered software product for under $100.

It saves CNC operators hours they used to spend fighting software just to cut a simple part.

I have been into computers since 1996. My first PC was a Gateway 2000 — if you know, you know. Computers were never the intimidating part for me. Code was. I never learned to write it. I never needed to.

I have always had a way with machines. Cars, tools, anything mechanical. AMF pinsetter mechanic. Tattoo artist. Fabricator. Screen printer. Web developer. Builder. If it had moving parts and a purpose I wanted to understand it.

I got into CNC machining by accident. I was between jobs when a friend called. "Hey — you're good with computers. I think you'd be a good fit at a friend's CNC shop." I walked in with zero mill machine knowledge. What I had was curiosity and the ability to figure things out.

There was a Hurco VMC 10i in the corner. I was running my ProtoTrak, watching that Hurco from the corner of my eye. The screen saver kicked on — a Windows logo. I thought: I can learn that.

I told the boss. He said: "You can't read a blueprint. Learn that and we'll talk."

I went home that night and found a US Navy technical drawing manual online. Printed the whole thing out. Brought it to work the next day. While my parts ran I read. By the end of the shift I walked over to the boss and showed him what I'd figured out in a single day.

Three weeks later I was programming the Hurco. Self-teaching and learning from the boss simultaneously.

Modern CNC machining, to me, is like playing a video game with real life consequences. Stupid in gives stupid out. You give two different guys the same print and the same machine and you will get two different programs to accomplish the same goal — both different and both of them right. I like that.

I Built A Business With A MASLOW.

Over the years I went deep. Hurco conversational programming certification. BobCAD. Fusion 360. RS-232 drip feeding set up from scratch in a live shop environment.

I built a MASLOW CNC from scratch — not just as a hobby but as a business. Used it to cut stencils for pavement painters. Made enough from that machine to buy a MillRight Mega V.

Then life came along the way it does. Had to sell the MillRight and go back to work in a shop. That's when I found out my back wasn't going to cooperate anymore. No more standing at the machine for hours. No more leaning over a table dialing in cut settings.

I had to find a different way to use what I know.

The Machine Sitting In My Friend's Shop.

A friend had bought a Langmuir CrossFire Pro. I was out of work at the time and saw an opportunity — "Hey, what are you going to do with that? You know I can run it." We figured it out together from there.

I already had Fusion 360 experience from the shop. I've always looked for the path of least resistance — learned the basics of BobCAD on the job, and the moment Fusion hit the scene I switched. Better tool, better workflow, done. So when my friend's CrossFire needed a CAM pipeline I already had the pieces. I just had to put them together on a new machine.

I taught them Fusion 360. And that's what made me see it clearly for the first time. CAD drawing. Coordinates. Scale. Speeds and feeds. Even with all of it in one place Fusion is overwhelming for the average person. It's not that people can't learn it — they can. But the learning curve is brutal and unforgiving. You're asking someone who just wants to cut a part to become fluent in an entirely new language before they ever strike an arc.

And I walked away thinking the same thing I'd thought a hundred times before — this process is harder than it needs to be. A lot harder. And the people it's hardest on are exactly the people who need it most.

I've Always Found The Next Tool First.

Throughout my entire career I've looked for the next tool before anyone else knew it existed. I'm not naturally strong at math — so the moment I found software that handled it for me I never looked back.

Design has always been part of who I am — both physical and software based. Before CNC I was using Adobe Creative Suite. I dabbled in web development, logo design, screen printing. I have always been into making things look right, whether that was on a screen or on a piece of metal.

DeltaCAD was my first introduction to CAD software specifically. Found a video about BobCAD, showed the boss, we tried it. When Fusion 360 came along I moved again. Better tool, better workflow, done.

Same with tooling. When I started we were running HSS drills and standard end mills. By the time I left we were running indexable Gold Rush tooling. The guys who resisted it didn't cut better parts — they just cut slower than everyone else.

I see AI the same way. It is simply the next tool. The tool doesn't care who made it or how. Neither does the metal.

Tattoo artist. Pinsetter mechanic. Machinist. Screen printer. Web developer. Fabricator. I have been around long enough to know that the tool that wins is the one that gets out of your way and lets you make the thing.

I Wonder.

I was home. Back problems keeping me off the floor. Learning about AI on YouTube because my brain still worked even if my back didn't. Something about automation caught my attention.

I wonder.

That was it. Just a quiet thought from a 49 year old machinist with time on his hands and a problem he understood better than almost anyone.

The problem — getting a design file turned into clean reliable GCode for a plasma cutter without expensive software, steep learning curves, or hours of frustration. I had lived that problem from the operator side for fourteen years. I knew exactly where it hurt.

You Can't Eat An Elephant All At Once.

My initial idea was everything at once. Universal CAM platform. All machines. All file formats. All controllers. I actually got a basic geometry engine working. Then kept adding. And adding. The whole thing collapsed under its own weight. I hit a wall.

I sat down and thought it through. Start small. Start with what you know best. One machine type. One focused problem. One bite.

Plasma cutting was the deliberate choice — not just familiarity. Two specific reasons. First, plasma cutting is fundamentally a 2D toolpath problem. No complex 3D surface modeling. No multi-axis kinematics. A focused, solvable problem with a clean technical boundary. Second, the hobbyist plasma market is enormous and deeply underserved. Hundreds of thousands of machines in garages and small shops, owned by people who know metal but don't know CAM software.

Large frustrated user base. Technically contained problem. That's where you start. Same instinct that sent me home with a Navy blueprint manual. Find the boundary of the problem. Start there.

One AI assistant. One conversation. Under $100 total — domain, subscriptions, API costs, everything. No coding background. No computer science degree. No team. No funding. Just a machinist who understood the problem from the inside and an AI that could translate that understanding into working software.

The result is SentienPath.

May 25, 2026.

Live payments. Live emails. Live GCode engine. Indexed on Google. Built by a 49 year old machinist with a bad back, a Gateway 2000 origin story, and the same instinct he's always had — find the manual, figure it out, show up the next day with proof.

The CAM software market charges $140 to $545 for tools that still punish beginners. SentienPath does it in seconds for $12 a month. And in CNC work time is everything — every minute you're fighting software is a minute you're not cutting parts. SentienPath doesn't just make the process easier. It gives you back hours.

What I need now is people who are actually cutting metal to put it through its paces and tell me where it breaks. That's the whole ask.

I am not a coder. That's the point.

// See It In Action

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