G-Code Sprint Back to site
Writer

Lawrence Arya

Lawrence Arya is the founder of G-Code Sprint. He writes about building products with AI, design, and shipping software that respects people's time.

Posts by Lawrence Arya

Code reference

Coduri G și M pentru strung CNC: lista esențială

Codurile G comandă mișcarea, codurile M comandă funcțiile mașinii. Iată codurile esențiale pentru strungul CNC și particularitatea diametrului pe axa X.

Lawrence Arya··10 min
Guides

怎么学 CNC 编程:零基础到上机的完整路线

学 CNC 编程的正确顺序是:先看懂图纸和坐标系,再背熟高频 G 代码和 M 代码,然后读懂别人的程序,最后在指导下上机。这份路线把每个阶段该练什么讲清楚。

Lawrence Arya··1 min
Code reference

Alapvető CNC G-kódok listája kezdőknek

A legfontosabb CNC G-kódok egy rövid, fix lista, amit papírról és aktív felidézéssel is megtanulhatsz. Itt vannak a kezdő kódok és a mögöttük lévő logika.

Lawrence Arya··10 min
Guides

Cara program CNC milling Fanuc untuk pemula

Memprogram CNC milling Fanuc jadi mudah jika Anda paham struktur program dan beberapa kode inti. Berikut strukturnya, kode utamanya, dan contoh sederhananya.

Lawrence Arya··10 min
Code reference

Common M-codes for the XYZ ProtoTRAK Control

The ProtoTRAK is mainly conversational, but it uses standard M-codes for the spindle, tool change, coolant, and program stops. Here are the common ones and what they do.

Lawrence Arya··10 min
Guides

Como ler um programa CNC linha por linha

Ler um programa CNC fica simples quando você lê em blocos, não palavra por palavra. Veja a estrutura, o que cada código significa e como ganhar fluência.

Lawrence Arya··10 min
Guides

Do CAM Programmers Need to Know Manual G-code?

Yes. CAM writes most of the code, but programmers still read it daily and hand-edit at the machine. Manual G-code is what separates a setter from a button pusher.

Lawrence Arya··10 min
Guides

Do I Need to Know G-code If I Use Mastercam?

You do not need to hand-write G-code to run Mastercam, but you do need to read it well enough to verify and fix what the post processor outputs.

Lawrence Arya··11 min
Guides

How to Learn CNC Programming in Prison

G-code is a small, fixed vocabulary you can master with printed references and active recall, even with limited internet. Here is a realistic path.

Lawrence Arya··10 min
Guides

How to Manually Edit Mastercam G-code Safely

You can hand-edit posted Mastercam code in Code Expert or a text editor, but the durable fix is the post or toolpath. Edit only the value, keep the block, re-verify.

Lawrence Arya··10 min
Guides

How to Read a G-code File in Notepad++

Open the .nc file in Notepad++, turn on line numbers and a monospace font, then add a User Defined Language so G, M, and coordinate words get color.

Lawrence Arya··10 min
Guides

How to Read Fusion 360 Post Processor G-code

Read Fusion 360 output in blocks: header and safety line, tool change, spindle and coolant, rapid to start, cutting moves, retract, end. The comments are your map.

Lawrence Arya··10 min
Code reference

Printable G-code Poster for the Shop Wall

A wall poster of the common G and M codes is a great quick reference. Here is what to put on it, how to format it to read from a few feet, and its one real limit.

Lawrence Arya··10 min
Guides

Understanding SolidCAM G-code Output

SolidCAM builds the toolpath, then a post processor turns it into machine-ready G-code. Read the output in blocks and verify offsets, tools, and retracts first.

Lawrence Arya··10 min
Guides

Why Does My CNC Router Cut Air? Causes and Fixes

A CNC router cutting air almost always means the Z zero, the work origin, or the units are wrong. Here is how to diagnose each cause and fix it before you waste stock.

Lawrence Arya··10 min
Guides

FSAE CNC Machining Resources for Student Teams

FSAE teams machine real parts on deadlines with rotating membership, so the resource that matters most is fast, transferable G-code fluency the team can pass on.

Lawrence Arya··4 min
Code reference

G76 Threading Cycle on Fanuc, Explained Simply

G76 is two lines that delegate a whole threading job: the first line sets the campaign rules, the second describes the thread. Each word, plainly explained.

Lawrence Arya··4 min
Code reference

HAL vs G-Code Pins in LinuxCNC: Two Layers, Not One

HAL wires the machine's hardware; G-code commands its motion. They meet at named signals, and confusing the two layers is the classic LinuxCNC beginner trap.

Lawrence Arya··4 min
Guides

How Does a CNC Machine Read Code Step by Step?

A CNC control reads one block at a time: parse the words, update modal state, plan the motion ahead, then drive the servos. The full pipeline, demystified.

Lawrence Arya··5 min
Guides

How to Manually Enter a Tool Offset in G-Code

Most tool offsets are entered on the offset page, not in the program: G43 H calls a length, the table holds the value. Where each lives, and the G10 exception.

Lawrence Arya··4 min
Guides

How to Read G-Code to Find the Next Tool Change

Finding the next tool change is a search skill: look for the T word and M06, read the preamble that re-establishes the tool, and use it as a safe restart point.

Lawrence Arya··4 min
Code reference

How to Set Work Zero on a CNC vs a 3D Printer

Printers find their zero by homing to switches; CNC machines are told theirs by touch-off into offsets. Why the philosophies differ, and what transfers.

Lawrence Arya··4 min
Guides

How to Teach G-Code to High School Shop Students

Teaching teens G-code works when it is concrete and fast: start with motion they can see, drill the core, write a square, and run it. The sequence and the traps.

Lawrence Arya··4 min
Practice

How to Write Raw G-Code for a Masso Controller

Masso's standalone controllers run a documented standard G-code subset: write against the published list, load by USB, and prove on the pendant. The method.

Lawrence Arya··4 min
Guides

What Does the G in G-Code Stand For, Actually?

Officially the G is the address for preparatory functions; informally everyone says geometric. The real story is the word-address format both answers sit in.

Lawrence Arya··5 min
Practice

Ano ang G-Code sa CNC Machine? Simpleng Paliwanag

Ang G-code ang lenggwahe ng CNC machine: bawat line ay utos kung saan gagalaw ang tool, gaano kabilis, at ano ang bubuksan. Heto ang basics na may halimbawa.

Lawrence Arya··5 min
Practice

แอพฝึกเขียนโปรแกรม CNC ฟรี: แบบไหนช่วยได้จริง

แอพฝึกเขียนโปรแกรม CNC ฟรีมีหลายแบบ แต่แบบที่ได้ผลคือควิซถาม-ตอบที่ตรวจทันทีและวนข้อผิดซ้ำ ไม่ใช่แอพตารางโค้ดหรือเกมตกแต่งธีมโรงงาน

Lawrence Arya··1 min
Practice

G-Code lernen per App: So funktioniert es wirklich

G-Code lernen mit einer App funktioniert, wenn die App Abruf trainiert statt Inhalte anzuzeigen: kurze Quiz-Runden, sofortige Korrektur, Wiederholung der Fehler.

Lawrence Arya··4 min
Practice

G-code สำหรับผู้เริ่มต้น: เริ่มจากศูนย์ให้ถูกทาง

G-code สำหรับผู้เริ่มต้นไม่ใช่การท่องตารางยาว แต่คือแกนโค้ดราว 20 ตัวที่ฝึกด้วยควิซสั้น ๆ ทุกวัน อ่านโปรแกรมจริงทีละบรรทัด แล้วค่อยไปที่เครื่องจักร

Lawrence Arya··2 min
Practice

ข้อสอบพนักงานควบคุมเครื่อง CNC: ออกอะไรและเตรียมอย่างไร

ข้อสอบพนักงานควบคุมเครื่อง CNC วนอยู่กับสี่เรื่อง อ่านโปรแกรม โค้ดแกน ตรรกะความปลอดภัย และการวัด พร้อมข้อสอบลอง 10 ข้อให้วัดตัวเองพร้อมเฉลย

Lawrence Arya··1 min
Practice

คู่มือ G-code เครื่องกัด CNC: หนึ่งหน้าที่ใช้งานได้จริง

คู่มือ G-code เครื่องกัดที่ดีไม่ใช่เล่มหนา แต่คือหน้าเดียวที่มีโค้ดใช้ประจำ จุดเน้นเรื่อง G43 ชดเชยความยาวเครื่องมือ และที่ว่างให้จดโค้ดเฉพาะเครื่อง

Lawrence Arya··2 min
Practice

ความแตกต่าง G02 G03 ใน CNC: ทิศของส่วนโค้งที่ไม่สับสนอีก

G02 เดินส่วนโค้งตามเข็มนาฬิกา G03 ทวนเข็ม โดยมองสวนแกนบวกของระนาบที่ใช้งาน บทความนี้มีกฎ ตัวอย่างโปรแกรม เทคนิคจำ และจุดที่เครื่องกลึงหลอกตา

Lawrence Arya··2 min
Code reference

Lista de códigos M para fresadora Haas, en español

Los códigos M que usarás a diario en una fresadora Haas, explicados en español: husillo, refrigerante, cambio de herramienta y paros, con sus avisos de seguridad.

Lawrence Arya··5 min
Practice

โปรแกรมจำลอง CNC บนมือถือ: อะไรทำได้จริง อะไรแค่ฝัน

โปรแกรมจำลอง CNC เต็มรูปแบบบนมือถือไม่มีจริง งานจำลองหนัก ๆ เป็นของคอมพิวเตอร์ แต่มือถือทำสองอย่างได้ดีกว่าคือดูเส้นทางเครื่องมือและฝึกจำโค้ด

Lawrence Arya··1 min
Code reference

Разница между G02 и G03 в ЧПУ: дуги без путаницы

G02 ведет дугу по часовой стрелке, G03 против часовой, если смотреть против положительной оси активной плоскости. Правило, пример и способ запомнить навсегда.

Lawrence Arya··4 min
Practice

เรียน CNC Fanuc ด้วยตัวเอง: ทำได้แค่ไหนและทำอย่างไร

เรียน CNC Fanuc ด้วยตัวเองได้ครึ่งทางคือชั้นความรู้ทั้งหมด โค้ดแกน นิสัยของ Fanuc อย่าง M98/M99 และกับดักระบบโค้ด A ส่วนหน้าจอจริงต้องพึ่งเครื่องและครู

Lawrence Arya··1 min
Practice

Стойка Siemens Sinumerik: G-коды и отличия от Fanuc

G-коды стойки Siemens Sinumerik: какое ядро совпадает со стандартом, где Sinumerik идет своим путем (G70/G71, фреймы, циклы CYCLE) и как не путать его с Fanuc.

Lawrence Arya··4 min
Practice

สอนเขียนโปรแกรม CNC เครื่องกลึง: เส้นทางที่ฝึกตามได้จริง

เรียนเขียนโปรแกรม CNC เครื่องกลึงทีละขั้น ตั้งแต่กฎ X เป็นเส้นผ่านศูนย์กลาง คู่ G96/G50 ไซเคิล G71/G70/G76 ไปจนถึงตัวอย่างโปรแกรมกลึงปอกอ่านทีละบรรทัด

Lawrence Arya··2 min
Practice

วิธีจำโค้ด CNC ให้แม่น: เลิกท่องตารางแล้วใช้สามเทคนิคนี้

จำโค้ด CNC ให้แม่นไม่ได้มาจากการท่องตารางซ้ำ ๆ แต่มาจากสามเทคนิค จัดกลุ่มตามหน้าที่ ผูกภาพช่วยจำกับคู่โค้ดที่ชอบสลับ และควิซถาม-ตอบสั้น ๆ ทุกวัน

Lawrence Arya··1 min
Practice

3D Printer to CNC Router: A Transition Guide

Your printing skills transfer further than you think: G-code, motion, firmware. The new part is force: workholding, feeds, and dust. Here is the honest map.

Lawrence Arya··4 min
Practice

CNC Basics for an Apprentice Mechanical Fitter

Moving from fitting into CNC? You already have the measurement and drawing skills. The new part is G-code. Here are the basics a mechanical fitter needs first.

Lawrence Arya··4 min
Practice

Apprenticeship Readiness Program G-Code Basics

An apprenticeship readiness program should teach a small G-code core: the starter codes, program structure, and offsets, drilled to recall before day one.

Lawrence Arya··4 min
Practice

Is There an Audiobook for Learning CNC G-Code?

Audio teaches CNC concepts well and symbol tables badly. Here is what listening can and cannot do for G-code, and the commute strategy that actually works.

Lawrence Arya··4 min
Practice

AutoCAD to G-Code: The Workflow and Manual Editing

AutoCAD never outputs G-code; the route is DXF into a CAM tool, post, then targeted hand edits. Here is the pipeline, drawing hygiene, and what is safe to edit.

Lawrence Arya··4 min
Practice

Best App to Learn CNC Router Programming

CNC routers run on G-code, even when CAM writes it for you. The best app to learn router programming is one that teaches the codes so you can verify and debug.

Lawrence Arya··5 min
Practice

The Best Fonts for Reading G-Code Without Errors

The best G-code fonts are monospaced with a slashed or dotted zero, distinct 1, l, and I, and a visible decimal point. Here is the checklist and why it matters.

Lawrence Arya··4 min
Practice

Centroid Acorn G-Code Practice for Beginners

The Centroid Acorn runs standard G and M codes, so learning the common codes is the fastest way to get comfortable. Here is what to practice and how.

Lawrence Arya··4 min
Practice

CNC Turning Macro Programming Examples (Macro B)

Macro programming adds variables, loops, and logic to turning G-code. Two worked examples: a parametric grooving loop and a parts counter, plus the syntax map.

Lawrence Arya··4 min
Code reference

CNC Wood Router M-Codes List (GRBL and Beyond)

A wood router's working M-codes are a short list: M3/M5 spindle, M0 pause, M2/M30 end, and the coolant pair M8/M9, usually rewired to dust collection or air.

Lawrence Arya··4 min
Code reference

I, J, K vs R in G02: Arc Center Words Explained

I, J, and K give the arc center as an offset from the start point, while R gives the radius. Here is when each works, and why full circles need I and J.

Lawrence Arya··5 min
Practice

Does Learning G-Code Increase Machinist Salary?

G-code skill alone does not raise pay; the roles it unlocks do. Operators who read and edit programs move up to setup and programming work, which pays more.

Lawrence Arya··4 min
Practice

Dyslexia and CNC Programming: What Actually Helps

CNC code is short, structured tokens rather than dense prose, which suits many dyslexic learners. Here are the real friction points and the fixes that work.

Lawrence Arya··4 min
Guides

Fanuc Alarm 010 Improper G-Code: Causes and Fixes

Fanuc alarm 010 means an improper G-code: a code that does not exist or is not enabled on your machine was commanded. Here are the common causes and how to find it.

Lawrence Arya··4 min
Guides

Fanuc Illegal Use of Decimal Point Alarm (007)

Fanuc alarm 007 means a decimal point on an address that does not allow one, or two decimals in a word. Here is which addresses take a decimal and which do not.

Lawrence Arya··4 min
Practice

Free CNC Study App and Resources for Veterans

Veterans moving into machining can build CNC code skills without spending anything: a free recall app, free study guides, and transition programs that stack.

Lawrence Arya··4 min
Practice

G-Code Flashcards for Special Education Students

Flashcard-style G-code practice suits special education well: bite-sized, self-paced, predictable, with immediate feedback. Here is why it works and how to use it.

Lawrence Arya··4 min
Practice

G-Code for Automatic Tool Changers on Wood Routers

On an ATC router the file just says T2 M6; a macro does the choreography. Here is the sequence, the rack vs carousel difference, and the per-tool Z that matters.

Lawrence Arya··4 min
Practice

G-Code Mnemonics and Memory Tricks That Stick

A working collection of G-code memory hooks: zero-cutting G00, the off-follows-on M-code families, Z follows the spindle, and the -30- end mark behind M30.

Lawrence Arya··4 min
Code reference

G-Code Variables: #100 vs #500 Series Differences

Macro variables differ by lifespan: #100-series commons clear at power-off, #500-series survive it, and locals #1-#33 live only inside a call. Here is the map.

Lawrence Arya··4 min
Code reference

G-Code vs M-Code: What Is the Difference?

G-codes control how the machine moves and M-codes control machine actions like the spindle and coolant. Here is the real difference and how they work together.

Lawrence Arya··4 min
Code reference

G20 vs G21: Inch vs Metric in G-Code, Explained

G20 tells the control to read the program in inches and G21 in millimeters. Here is the difference, why the wrong one is dangerous, and how to keep them straight.

Lawrence Arya··4 min
Code reference

G28 Return to Home Position in G-Code, Explained

G28 sends the machine back to its reference (home) position, through an intermediate point you specify. Here is how it works and how to use it safely.

Lawrence Arya··4 min
Code reference

G41 vs G42: Cutter Compensation Left vs Right

G41 offsets the cutter to the left of the path and G42 to the right. Here is how cutter compensation works, the D register, and how to engage it without a crash.

Lawrence Arya··4 min
Code reference

G43 Tool Length Offset in G-Code, Explained

G43 applies a tool's stored length so its tip reaches the programmed Z, no matter how long the tool is. Here is how G43, the H register, and G49 work.

Lawrence Arya··5 min
Guides

G50 Max Spindle Speed on a Lathe (and the Crash)

On a lathe, G50 S sets the maximum spindle RPM. Leave it out with constant surface speed and the spindle can run away near the center. Here is why and the fix.

Lawrence Arya··4 min
Code reference

G54 Work Offsets Explained for CNC Beginners

G54 tells the machine where your part zero is. Here is what a work offset stores, how G54 to G59 differ, and how to set one without cutting in the wrong place.

Lawrence Arya··4 min
Code reference

G81 vs G83: Drilling Canned Cycles Explained

G81 is a simple drill cycle and G83 is a peck drill cycle for deep holes. Here is how canned cycles work, their R, Z, and Q words, and when to use each.

Lawrence Arya··5 min
Guides

How to Calculate Feed Rate for G01 (Beginner Guide)

The F value on a G01 line is feed rate, and you calculate it from spindle speed, feed per tooth, and the number of flutes. Here is the formula with a worked example.

Lawrence Arya··5 min
Practice

How to Go From CNC Operator to CNC Programmer

The operator-to-programmer path runs through four stages: code literacy, setup work, supervised program edits, then writing and CAM. Here is the roadmap.

Lawrence Arya··4 min
Guides

How to Read a CNC Program for Beginners

A CNC program is read one block at a time, top to bottom. Here is how to decode each line of a real program, the letters that matter, and how to get fluent.

Lawrence Arya··5 min
Code reference

How to Remember Lathe M-Codes vs Mill M-Codes

The core M-codes are identical on lathes and mills, so learn them once. The real difference to remember is the tool change: M06 on a mill, the T word on a lathe.

Lawrence Arya··5 min
Practice

How to Stop Skipping Lines When Reading G-Code

Line-skipping happens because programs look visually uniform and eyes lose anchor. Physical tracking, narration, and instant code recall end it reliably.

Lawrence Arya··4 min
Practice

Conversational or G-Code First? What to Learn When

Learn G-code first in most cases: it transfers everywhere and makes every conversational system easier. Learn conversational first only for this week's machine.

Lawrence Arya··4 min
Guides

Why a Boring Bar Crashes Into the Back of the Part

A boring bar hits the back of the part when the Z depth runs too far: wrong depth, wrong Z zero, an absolute mix-up, or a bad retract. Here are the causes and fixes.

Lawrence Arya··5 min
Code reference

G71 vs G72: Lathe Roughing Cycles Explained

G71 roughs with passes along Z for shafts and long profiles, G72 roughs with passes along X for faces. Here is how each cycle works and which to pick.

Lawrence Arya··5 min
Code reference

Lathe vs Mill G-Code Differences: A Cheat Sheet

The motion core is identical; six differences do the damage: default plane, diameter programming, feed modes, CSS, cycle families, and comp mechanics.

Lawrence Arya··4 min
Code reference

Left-Hand Threading M-Code: M04 vs M03 Explained

A left-hand tap runs on M04, the reverse spindle code, with the G74 cycle on mills. For single-point threading, the spindle and feed direction together set the hand.

Lawrence Arya··5 min
Code reference

LightBurn G-Code Console Commands, Explained Simply

LightBurn's console is a direct line to your GRBL controller: $$ lists settings, $H homes, $X unlocks, $G shows active modes. Here is the working command set.

Lawrence Arya··4 min
Code reference

M3 vs M4 on a CNC Laser Cutter: Which Mode to Use

In GRBL laser mode, M3 holds constant power while M4 scales power with speed, killing corner burn. Here is when each wins and why laser mode must be on.

Lawrence Arya··4 min
Code reference

Mazatrol vs G-Code: The Differences That Matter

Mazatrol is Mazak's menu-guided programming language; G-code is the universal word-address standard. Here is how they differ and when each one wins.

Lawrence Arya··4 min
Guides

Missing Decimal Point in G-Code: Why It Crashes

A missing decimal point can make a G-code move 1000 times too big or too small, depending on the control's setting. Here is why it happens and how to avoid it.

Lawrence Arya··4 min
Code reference

Siemens ShopMill vs ISO G-Code: Which to Use When

ShopMill programs Sinumerik machines through graphical work steps; ISO G-code programs them through classic blocks. Here is how they differ and when each wins.

Lawrence Arya··4 min
Practice

Spaced Repetition Software for CNC Codes: A Guide

CNC codes are ideal spaced-repetition material: small, stable, arbitrary. Here is what belongs in the deck, the schedule, and the build-vs-prebuilt choice.

Lawrence Arya··4 min
Practice

VMC Operator Interview Questions and Strong Answers

VMC operator interviews focus on the vertical mill's daily realities: tool changes, G43 and G54 offsets, canned cycles, and crash judgment. Here are the questions.

Lawrence Arya··4 min
Code reference

What Is G54 in 3D Printing? Work Offsets Explained

G54 selects a stored work origin, a CNC concept most 3D printers never use. Here is what it does, which firmware supports it, and what printers use instead.

Lawrence Arya··5 min
Guides

Why Did ChatGPT G-Code Crash My CNC? What to Check

AI-written G-code crashes because the model does not know your machine, offsets, tools, or fixtures, and it can invent codes that look right. Here is what to check.

Lawrence Arya··4 min
Guides

Why Did My End Mill Break on G01? Common Causes

An end mill usually breaks on a G01 feed move from overload: too much feed, too deep a cut, a straight plunge, or a wrong speed. Here are the causes and fixes.

Lawrence Arya··4 min
Practice

Why Do Machinists Still Write G-Code Manually?

CAM generates most production code, yet machinists still type G-code daily: MDI moves, edits at the machine, simple parts, macros, and fixing what CAM got wrong.

Lawrence Arya··4 min
Code reference

Why Is G02 Cutting a Straight Line? Common Causes

G02 cuts a straight line when the arc is not actually defined: missing I and J words, a firmware without arc support, the wrong plane, or a huge radius.

Lawrence Arya··5 min
Practice

CNC Practice Resources for Women in Manufacturing

Free, low-barrier CNC practice resources help more women enter machining. Here are the types that work, from recall apps to study guides, and how to use them.

Lawrence Arya··4 min
Code reference

Basic G-Code and M-Code List for a TESDA CNC Exam

The core G-code and M-code a TESDA CNC exam expects you to know: motion, units, positioning, spindle, coolant, and program control. A focused study list.

Lawrence Arya··5 min
Practice

Can I Use a Cheat Sheet During a CNC Interview?

Usually not during the test portion, and even when allowed, leaning on one reads as inexperience. Here is the honest answer and what to do instead.

Lawrence Arya··5 min
Practice

CNC Lathe Operator Hands-On Test: How to Prepare

A lathe operator hands-on test checks chucking, offsets, turning a part, and reading the program. Here is how to prepare, with the turning codes you need cold.

Lawrence Arya··5 min
Practice

CNC Milling Artisan Trade Test: What to Expect

An artisan-level milling trade test goes beyond running a job into planning, setup, problem-solving, and producing to drawing. Here is the scope and how to prepare.

Lawrence Arya··5 min
Practice

CNC Turning Center G-Code: How Lathe Codes Differ

Turning shares the common codes with milling but adds lathe-specific ones: constant surface speed, diameter mode, and turning cycles. Here is what to practice.

Lawrence Arya··5 min
Practice

Common Mistakes to Avoid in a CNC Practical Exam

Most practical-exam failures are avoidable: rushing, wrong units, skipping offset checks, and freezing on a code. Here are the common ones and how to dodge them.

Lawrence Arya··5 min
Practice

Do I Need to Memorize G-Code for the NIMS Test?

You do not need to memorize the whole G-code standard for a NIMS test, but you do need fast recall of the common codes. Here is the line between the two.

Lawrence Arya··5 min
Practice

Is There a Duolingo for CNC Programming?

The Duolingo idea, short daily lessons, streaks, and spaced review, maps almost perfectly onto learning G-code. Here is why, and what to look for in a tool.

Lawrence Arya··5 min
Practice

CNC Flashcards for Visual Learners: Do They Help?

Visual flashcards (color-coded codes, little toolpath sketches) make CNC codes easier to recall through dual coding, which helps most people, not just 'visual learners'.

Lawrence Arya··5 min
Guides

G-Code for Mechanical Engineers: A Crash Course

Engineers do not need to hand-write programs, but reading G-code helps you verify CAM output and talk to machinists. Here is the focused crash course.

Lawrence Arya··5 min
Code reference

Thread Milling vs Tapping: The G-Code Difference

Tapping uses a canned cycle like G84; thread milling uses helical interpolation with G02 or G03 plus Z. Here is how the two approaches differ in code.

Lawrence Arya··5 min
Practice

CNC Practice for Veterans Entering the Trades

Transitioning from the military into a CNC career means learning the codes fast. Here is how veterans can prepare for a CNC practice test, free, before an apprenticeship.

Lawrence Arya··5 min
Practice

How to Memorize Numbers Easily for CNC Codes

G-code and M-code are numbers, and numbers are hard to memorize raw. Chunking, meaning hooks, and spaced recall make them stick. Here is how to apply each.

Lawrence Arya··5 min
Practice

How to Pass a CNC Setter Trade Test Abroad

Trade tests abroad assess the same setter skills everywhere, with local language and procedure on top. Here is how to prepare, codes first, language second.

Lawrence Arya··5 min
Practice

How to Pass the NIMS CNC Mill Operations Exam

A practical plan for the NIMS CNC mill operations exam: the mill code scope, the setup skills it checks, and exam-day strategy that keeps you calm.

Lawrence Arya··5 min
Code reference

How to Program a Helix in G-Code (G02/G03 With Z)

A helix is just a circular arc with a simultaneous Z move. Add a Z value to a G02 or G03 and the tool spirals instead of staying flat. Here is how it works.

Lawrence Arya··5 min
Practice

How to Read a G-Code Print in an Interview Test

Handed a program printout in an interview? Read it in a fixed order: units and mode first, then setup, then the moves. Here is the method that keeps you calm.

Lawrence Arya··5 min
Practice

Is There a Game to Learn G-Code?

There is no big 'G-code video game,' but game-style recall drills exist and work. Here is what is actually available and what to look for.

Lawrence Arya··5 min
Practice

ITI CNC Practical Exam: What to Study and Practice

An ITI CNC practical exam tests reading and running a program: the common G-code and M-code, setup, and safe operation. Here is what to study, not answers to copy.

Lawrence Arya··5 min
Practice

G-Code Practice Resources for CNC Instructors

Free ways to add G-code recall practice to a CNC class: warm-up drills, mix-up sets, and progress checks that complement NIMS-aligned curriculum.

Lawrence Arya··5 min
Practice

NIMS Prep for Pre-Apprenticeship Programs

Pre-apprenticeship programs use NIMS-aligned basics to get you ready to start. Here is what to learn first so you walk in prepared, not behind.

Lawrence Arya··5 min
Practice

Questions a Lead Machinist Asks in an Interview

When a lead machinist runs the interview, the questions go past definitions into judgment: how you catch mistakes, work safely, and think under pressure. Here is how to answer.

Lawrence Arya··5 min
Practice

CNC Practice for Women Entering Machining

Women-in-trades programs open the door to machining careers. The skills are identical for everyone, and the code foundation is free to build. Here is how to prepare.

Lawrence Arya··5 min
Guides

Shapeoko CNC Router G-Code: What to Practice

A Shapeoko runs a friendly G-code subset through GRBL. Here is what to practice so you can read and tweak the programs your CAM software generates.

Lawrence Arya··5 min
Practice

Trade Test Prep for a CNC Setter (South Africa)

A South African CNC setter trade test checks practical skill: reading a program, setting offsets, tooling, and producing a part. Here is how to prepare, codes first.

Lawrence Arya··5 min
Practice

What to Expect in a CNC Setup Interview

A setup-focused interview often moves to the machine: explain a program, set an offset, talk through a tool change. Here is how it tends to flow and how to prepare.

Lawrence Arya··5 min
Guides

Why Did My CNC Crash on G00? Common Beginner Causes

A G00 rapid moves at full speed, so a wrong offset, tool length, or start point turns a small mistake into a crash. Here are the usual causes, explained for learners.

Lawrence Arya··5 min
Practice

Will a Machine Shop Test My G-Code Knowledge?

Many shops do test your code knowledge when hiring, through a short quiz, a program to read, or questions at the machine. Here is what to expect and how to be ready.

Lawrence Arya··5 min
Code reference

Common G-Codes Every CNC Beginner Should Know

A short reference list of the G-codes that show up in almost every CNC program, with a one-line meaning for each, built for beginners.

Lawrence Arya··5 min
Code reference

M03 vs M04 vs M05: Spindle Codes Made Simple

M03 starts the spindle clockwise, M04 starts it counterclockwise, and M05 stops it. Here is what each does and how to remember the set.

Lawrence Arya··5 min
Code reference

Common M-Codes Every CNC Beginner Should Know

A short reference of the M-codes you will meet first: spindle, coolant, tool change, and program control, each with a plain-language meaning.

Lawrence Arya··5 min