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<!doctype html>
<html lang="en">
<head>
<meta charset="utf-8" />
<meta name="viewport" content="width=device-width, initial-scale=1" />
<meta
name="description"
content="Edit turning and milling programs, calculate toolpaths and inspect tool motion in a 3D scene. Supports FANUC and a subset of SINUMERIK 840D commands."
/>
<meta name="theme-color" content="#151619" />
<title>Easy G-Code Plot — CNC program editor and toolpath viewer</title>
<link rel="icon" type="image/svg+xml" href="assets/logo.svg" />
<link rel="stylesheet" href="styles.css" />
<link rel="alternate" hreflang="en" href="index.html" />
<link rel="alternate" hreflang="ru" href="ru/index.html" />
<script src="downloads.js" defer></script>
</head>
<body>
<a class="skip" href="#main">Skip to content</a>
<header class="site-header">
<div class="container header-inner">
<a class="brand" href="index.html"
><img src="assets/logo.svg" width="36" height="36" alt="" /><span
>Easy G-Code Plot</span
></a
>
<nav aria-label="Main navigation">
<a href="#capabilities">Supported commands</a
><a href="#visualization">Interface</a
><a href="#execution">Calculation</a
><a href="#automation">CLI & export</a>
</nav>
</div>
</header>
<main id="main" class="container">
<section class="hero" aria-labelledby="hero-title">
<p class="eyebrow">Windows / Linux <span>·</span> GUI / CLI</p>
<h1 id="hero-title">CNC program editor and toolpath viewer</h1>
<p class="lead">
Edit turning and milling programs, calculate toolpaths and inspect
tool motion in a 3D scene. Supports FANUC and a subset of SINUMERIK
840D commands.
</p>
<ul class="tags">
<li>FANUC G-code</li>
<li>FANUC Macro B</li>
<li>SINUMERIK 840D</li>
<li>STL Models & DXF Export</li>
<li>Pocket & Hole Coordinate Generators</li>
</ul>
<div class="actions">
<a
class="button primary"
data-windows-download="gui"
href="https://github.com/MaestroFusion360/easy_gcode_plot/releases/latest"
>Download for Windows</a
><a
class="button"
data-windows-download="cli"
href="https://github.com/MaestroFusion360/easy_gcode_plot/releases/latest/download/easy_gcode_plot_cli.exe"
>Download CLI for Windows</a
><a
class="button"
href="https://github.com/MaestroFusion360/easy_gcode_plot/blob/main/FAQ.md"
>Documentation</a
><a
class="text-link"
href="https://github.com/MaestroFusion360/easy_gcode_plot"
>GitHub</a
>
</div>
<p class="note">
Linux builds are also available on the
<a
href="https://github.com/MaestroFusion360/easy_gcode_plot/releases/latest"
>release page</a
>.
</p>
<figure class="hero-image">
<img
src="assets/img2.gif"
width="1280"
height="640"
alt="Milling toolpath in Easy G-Code Plot"
fetchpriority="high"
decoding="async"
/>
<figcaption>Program editor and 3D toolpath view</figcaption>
</figure>
</section>
<section id="capabilities" class="section">
<div class="section-heading">
<h2>Supported commands and cycles</h2>
</div>
<div class="controller-reference">
<h3>FANUC Turning — Type A / Type B</h3>
<details class="code-table">
<summary>FANUC Turning Type A / Type B</summary>
<div
class="table-wrap"
role="region"
aria-label="FANUC Turning Type A / Type B"
tabindex="0"
>
<table>
<thead>
<tr>
<th scope="col">Operation</th>
<th scope="col">Type A</th>
<th scope="col">Type B</th>
</tr>
</thead>
<tbody>
<tr>
<td>Rapid</td>
<td>G00</td>
<td>G00</td>
</tr>
<tr>
<td>Linear</td>
<td>G01</td>
<td>G01</td>
</tr>
<tr>
<td>Arc CW</td>
<td>G02</td>
<td>G02</td>
</tr>
<tr>
<td>Arc CCW</td>
<td>G03</td>
<td>G03</td>
</tr>
<tr>
<td>Dwell</td>
<td>G04</td>
<td>G04</td>
</tr>
<tr>
<td>Thread cutting</td>
<td>G32</td>
<td>G33</td>
</tr>
<tr>
<td>Coordinate system / spindle clamp</td>
<td>G50</td>
<td>G92</td>
</tr>
<tr>
<td>Finish cycle</td>
<td>G70</td>
<td>G70</td>
</tr>
<tr>
<td>Rough turning</td>
<td>G71</td>
<td>G71</td>
</tr>
<tr>
<td>Rough facing</td>
<td>G72</td>
<td>G72</td>
</tr>
<tr>
<td>Pattern repeating</td>
<td>G73</td>
<td>G73</td>
</tr>
<tr>
<td>Face peck drilling</td>
<td>G74</td>
<td>G74</td>
</tr>
<tr>
<td>OD/ID grooving</td>
<td>G75</td>
<td>G75</td>
</tr>
<tr>
<td>Multiple threading</td>
<td>G76</td>
<td>G76</td>
</tr>
<tr>
<td>Turning canned cycle</td>
<td>G90</td>
<td>G77</td>
</tr>
<tr>
<td>Threading canned cycle</td>
<td>G92</td>
<td>G78</td>
</tr>
<tr>
<td>Facing canned cycle</td>
<td>G94</td>
<td>G79</td>
</tr>
<tr>
<td>Feed per minute</td>
<td>G98</td>
<td>G94</td>
</tr>
<tr>
<td>Feed per revolution</td>
<td>G99</td>
<td>G95</td>
</tr>
</tbody>
</table>
</div>
</details>
<details class="code-table">
<summary>Turning cycles</summary>
<div
class="table-wrap"
role="region"
aria-label="Turning cycles"
tabindex="0"
>
<table>
<thead>
<tr>
<th scope="col">Type A</th>
<th scope="col">Type B</th>
<th scope="col">Purpose in the kernel</th>
</tr>
</thead>
<tbody>
<tr>
<td>G70</td>
<td>G70</td>
<td>P-Q finishing contour</td>
</tr>
<tr>
<td>G71</td>
<td>G71</td>
<td>Longitudinal roughing</td>
</tr>
<tr>
<td>G72</td>
<td>G72</td>
<td>Facing roughing</td>
</tr>
<tr>
<td>G73</td>
<td>G73</td>
<td>Pattern-repeat roughing</td>
</tr>
<tr>
<td>G74</td>
<td>G74</td>
<td>Z peck / face grooving</td>
</tr>
<tr>
<td>G75</td>
<td>G75</td>
<td>X peck / radial grooving</td>
</tr>
<tr>
<td>G76</td>
<td>G76</td>
<td>Two-line multipass threading</td>
</tr>
<tr>
<td>G83</td>
<td>G83</td>
<td>Axial peck drilling</td>
</tr>
<tr>
<td>G84</td>
<td>G84</td>
<td>Axial tapping</td>
</tr>
<tr>
<td>G90</td>
<td>G77</td>
<td>Modal longitudinal turning cycle</td>
</tr>
<tr>
<td>G92</td>
<td>G78</td>
<td>Modal threading cycle</td>
</tr>
<tr>
<td>G94</td>
<td>G79</td>
<td>Modal facing cycle</td>
</tr>
</tbody>
</table>
</div>
</details>
<details class="code-table">
<summary>Cycle behavior</summary>
<div
class="table-wrap"
role="region"
aria-label="Turning cycle behavior"
tabindex="0"
>
<table class="cycle-description">
<thead>
<tr>
<th scope="col">Cycle</th>
<th scope="col">Description</th>
</tr>
</thead>
<tbody>
<tr>
<th scope="row"><code>G70</code></th>
<td>
<p>
<code>G70 P... Q...</code> builds the referenced finish
contour and approaches it from the actual G70 call
position.
</p>
<p>
The finish path is based on the nominal P-Q profile, not
the roughing-offset profile used by G71/G72/G73.
</p>
<p>
If tool-nose compensation is active and can be verified,
the finishing contour uses the compensated profile.
</p>
<p>
After the finish group, the cycle returns to the saved
call position using the project's deterministic turning
return order.
</p>
</td>
</tr>
<tr>
<th scope="row"><code>G71</code></th>
<td>
<p>The common two-line FANUC form is modeled:</p>
<pre><code class="language-text">G71 U... R...
G71 P... Q... U... W... F...
</code></pre>
<p>
The first line captures rough depth and retract. The
second line supplies the P-Q profile, finishing
allowances and feed.
</p>
</td>
</tr>
<tr>
<th scope="row"><code>G72</code></th>
<td>
<p>
G72 uses the same P-Q profile infrastructure as G71 but
performs facing roughing in Z planes.
</p>
<p>Typical two-line form:</p>
<pre><code class="language-text">G72 W... R...
G72 P... Q... U... W... F...
</code></pre>
<p>
The first line captures axial depth and retract. The
second line references the profile and finishing
allowances.
</p>
</td>
</tr>
<tr>
<th scope="row"><code>G73</code></th>
<td>
<p>
G73 is implemented as repeated shifted copies of the
roughing profile.
</p>
<p>
The first line captures the total U/W pattern
displacement and the R pass count. The second line
provides P/Q, finish allowances and feed.
</p>
<p>
The signs of programmed U/W are preserved. The cycle
does not infer displacement direction from where the
tool happened to approach the contour.
</p>
</td>
</tr>
<tr>
<th scope="row"><code>G74</code></th>
<td>
<p>
G74 supports Z-direction peck behavior and face-grooving
style repetition.
</p>
<p>
A first block containing R alone can establish the
retract distance. The executing block can use X/U and
Z/W plus P/Q/R/F parameters.
</p>
<p>
If no X target is supplied, G74 can operate as a
drilling-style Z peck at the current X.
</p>
<p>
When X repetition is requested, P controls the X step
and Q controls Z peck depth. The cycle returns to its
saved start using an explicit Z-first return order.
</p>
</td>
</tr>
<tr>
<th scope="row"><code>G75</code></th>
<td>
<p>G75 performs X-direction peck/radial grooving.</p>
<p>
P controls the radial peck step. Q can repeat grooves
along Z. If Q is omitted, a programmed Z/W selects one
groove location rather than being treated as an invalid
zero-step repetition.
</p>
<p>
The R value from the setup block controls retract
distance, and the executing-block R value is handled as
the bottom allowance where applicable.
</p>
</td>
</tr>
<tr>
<th scope="row"><code>G76</code></th>
<td>
<p>The modeled form is FANUC-style two-line G76:</p>
<pre><code class="language-text">G76 P...... Q... R...
G76 X... Z... P... Q... R... F...
</code></pre>
<p>The first block stores:</p>
<ul>
<li>packed P control digits;</li>
<li>minimum radial increment Q;</li>
<li>optional finish allowance R.</li>
</ul>
<p>The second block supplies:</p>
<ul>
<li>final thread X;</li>
<li>final Z;</li>
<li>thread height P;</li>
<li>first cut Q;</li>
<li>optional taper R;</li>
<li>lead F.</li>
</ul>
</td>
</tr>
<tr>
<th scope="row"><code>G83</code></th>
<td>
<p>G83 is an axial Z drilling cycle.</p>
<ul>
<li>If Q is supplied, Z pecks are generated.</li>
<li>
If Q is absent, the kernel does not invent peck depth;
it emits one feed stroke to depth and a rapid return.
</li>
<li>
Optional X positioning is handled before the axial
stroke and restored afterward.
</li>
</ul>
</td>
</tr>
<tr>
<th scope="row"><code>G84</code></th>
<td>
<p>
G84 is an axial tapping cycle. The downstroke and return
are synchronized feed motions; the return is not
represented as a rapid move.
</p>
</td>
</tr>
<tr>
<th scope="row"><code>G90</code></th>
<td>
<p>
Yes. G90 establishes a longitudinal rectangular turning
cycle. Subsequent X/U-only blocks can continue the
active cycle at new diameters until cancellation by
another explicit motion/cycle code.
</p>
</td>
</tr>
<tr>
<th scope="row"><code>G92</code></th>
<td>
<p>Example:</p>
<pre><code class="language-text">G92 X18 Z-10 F1.5
X17.5
X17.0
</code></pre>
<p>
The initial G92 establishes the thread end and lead.
Subsequent X/U-only blocks continue the active G92 cycle
with new depths until another explicit motion/cycle mode
cancels it.
</p>
<p>
Each pass expands to approach, synchronized longitudinal
cutting, retract and return primitives.
</p>
</td>
</tr>
<tr>
<th scope="row"><code>G94</code></th>
<td>
<p>
Yes. G94 establishes a facing rectangular cycle.
Subsequent Z/W-only blocks can continue the active cycle
at new face positions until cancellation.
</p>
</td>
</tr>
</tbody>
</table>
</div>
</details>
<p class="note">
G71 Type II supports pocketed profiles conservatively. G72 Type II
rejects multiple disjoint spans in one facing plane
(UNSUPPORTED_G72_TYPE_II_SPANS). G76 supports tool angles 0°, 29°,
30°, 55°, 60° and 80°; other angles produce
UNSUPPORTED_G76_TOOL_ANGLE.
</p>
<p class="note">
<a
href="https://github.com/MaestroFusion360/easy_gcode_plot/blob/main/FAQ.md#turning-cycles"
>Parameters and limitations in the FAQ →</a
>
</p>
</div>
<div class="controller-reference">
<h3>FANUC Mill</h3>
<details class="code-table">
<summary>Milling G functions</summary>
<div
class="table-wrap"
role="region"
aria-label="Milling G functions"
tabindex="0"
>
<table>
<thead>
<tr>
<th scope="col">G code</th>
<th scope="col">Function in the kernel</th>
</tr>
</thead>
<tbody>
<tr>
<td>G00</td>
<td>Rapid positioning</td>
</tr>
<tr>
<td>G01</td>
<td>Linear interpolation</td>
</tr>
<tr>
<td>G02 / G03</td>
<td>Clockwise / counterclockwise circular interpolation</td>
</tr>
<tr>
<td>G04</td>
<td>Dwell signal; no spatial motion</td>
</tr>
<tr>
<td>G10</td>
<td>
Program WCS offsets (<code>L2</code>, <code>L20</code>)
</td>
</tr>
<tr>
<td>G15 / G16</td>
<td>Cancel / enable polar coordinate programming</td>
</tr>
<tr>
<td>G17 / G18 / G19</td>
<td>Select XY / XZ / YZ plane</td>
</tr>
<tr>
<td>G20 / G21</td>
<td>Inch / millimetre input units</td>
</tr>
<tr>
<td>G28</td>
<td>Reference return using the configured home</td>
</tr>
<tr>
<td>G40 / G41 / G42</td>
<td>Cancel / left / right cutter-radius compensation</td>
</tr>
<tr>
<td>G43 / G49</td>
<td>
Track / cancel tool-length state; G43 does not apply H
geometry to the plotted path
</td>
</tr>
<tr>
<td>G43.4</td>
<td>
Continuous TCP linear and rotary motion for the enabled
angled AC/BC table profiles; circular rotary arcs and
combination with G68.2 are unsupported
</td>
</tr>
<tr>
<td>G50 / G51</td>
<td>Cancel / enable coordinate scaling</td>
</tr>
<tr>
<td>G52</td>
<td>Local coordinate shift</td>
</tr>
<tr>
<td>G53</td>
<td>Non-modal machine-coordinate motion</td>
</tr>
<tr>
<td>G54–G59</td>
<td>Select work coordinate system</td>
</tr>
<tr>
<td>G54.1 P1–P99</td>
<td>
Parsed and selected; the GUI has no offset setting, so the
offset is zero unless the program sets it with G10 L20
</td>
</tr>
<tr>
<td>G65</td>
<td>Call a Macro B program</td>
</tr>
<tr>
<td>G68 / G69</td>
<td>Enable / cancel coordinate rotation</td>
</tr>
<tr>
<td>G68.2 / G53.1</td>
<td>
Tilted working plane / tool-axis orientation (3+2,
<code>fanuc_mill</code> with two-axis table-table,
head-head or head-table kinematics)
</td>
</tr>
<tr>
<td>G73</td>
<td>High-speed peck drilling cycle</td>
</tr>
<tr>
<td>G80</td>
<td>Cancel canned cycle</td>
</tr>
<tr>
<td>G81</td>
<td>Drilling cycle</td>
</tr>
<tr>
<td>G82</td>
<td>Drilling cycle with dwell</td>
</tr>
<tr>
<td>G83</td>
<td>Full-retract peck drilling cycle</td>
</tr>
<tr>
<td>G84</td>
<td>Tapping cycle</td>
</tr>
<tr>
<td>G85</td>
<td>Boring cycle with feed return</td>
</tr>
<tr>
<td>G86</td>
<td>Boring cycle with spindle-stop signal</td>
</tr>
<tr>
<td>G90 / G91</td>
<td>Absolute / incremental programming</td>
</tr>
<tr>
<td>G94 / G95</td>
<td>Feed per minute / feed per revolution</td>
</tr>
<tr>
<td>G98 / G99</td>
<td>Return to initial / R plane in canned cycles</td>
</tr>
</tbody>
</table>
</div>
</details>
<details class="code-table">
<summary>Milling M functions</summary>
<div
class="table-wrap"
role="region"
aria-label="Milling M functions"
tabindex="0"
>
<table>
<thead>
<tr>
<th scope="col">M code</th>
<th scope="col">Function in the kernel</th>
</tr>
</thead>
<tbody>
<tr>
<td>M00 / M01</td>
<td>Stop / optional-stop signal</td>
</tr>
<tr>
<td>M02 / M30</td>
<td>End program</td>
</tr>
<tr>
<td>M03 / M04 / M05</td>
<td>Spindle clockwise / counterclockwise / stop signals</td>
</tr>
<tr>
<td>M06</td>
<td>Tool-change event for the selected T number</td>
</tr>
<tr>
<td>M07</td>
<td>
Recognized; no machine-specific coolant action is modeled
</td>
</tr>
<tr>
<td>M08 / M09</td>
<td>Coolant on / off signals</td>
</tr>
<tr>
<td>M19</td>
<td>
Spindle-orientation signal; S on this block is an angle,
not spindle RPM
</td>
</tr>
<tr>
<td>M29</td>
<td>
Prepare rigid tapping; S on this block sets spindle RPM
for the following G84
</td>
</tr>
<tr>
<td>M98 / M99</td>
<td>Call / return from subprogram</td>
</tr>
</tbody>
</table>
</div>
</details>
<details class="code-table">
<summary>Milling cycle behavior</summary>
<div
class="table-wrap"
role="region"
aria-label="Milling cycle behavior"
tabindex="0"
>
<table class="cycle-description">
<thead>
<tr>
<th scope="col">Command</th>
<th scope="col">Description</th>
</tr>
</thead>
<tbody>
<tr>
<th scope="row"><code>G73 / G83</code></th>
<td>
<p>
G73 is high-speed peck drilling with short intermediate
retract behavior. G83 uses the full-retract drilling
behavior modeled by the common drilling layer.
</p>
</td>
</tr>
<tr>
<th scope="row"><code>G82</code></th>
<td>
<p>
G82 includes its dwell semantics, but dwell itself does
not create spatial geometry.
</p>
</td>
</tr>
<tr>
<th scope="row"><code>G84</code></th>
<td>
<p>
G84 tapping returns from depth as synchronized feed
motion rather than rapid motion.
</p>
</td>
</tr>
<tr>
<th scope="row"><code>G86</code></th>
<td>
<p>
The cycle models spindle-stop semantics together with
its drilling motion/return behavior.
</p>
</td>
</tr>
<tr>
<th scope="row"><code>G98 / G99</code></th>
<td>
<p>
For milling canned cycles, G98/G99 select cycle return
behavior. They are not the turning feed-mode meanings of
G98/G99.
</p>
</td>
</tr>
</tbody>
</table>
</div>
</details>
<p class="note">
<a
href="https://github.com/MaestroFusion360/easy_gcode_plot/blob/main/FAQ.md#fanuc-milling"
>Parameters and limitations in the FAQ →</a
>
</p>
</div>
<div class="controller-reference">
<h3>SINUMERIK 840D ISO-M — G291</h3>
<details class="code-table">
<summary>SINUMERIK ISO-M</summary>
<div
class="table-wrap"
role="region"
aria-label="SINUMERIK ISO-M"
tabindex="0"
>
<table>
<thead>
<tr>
<th scope="col">ISO-M function</th>
<th scope="col">Support and limitations</th>
</tr>
</thead>
<tbody>
<tr>
<td>G290 / G291</td>
<td>
Standalone blocks select native / ISO-M mode. MPF/SPF
execution starts in native mode.
</td>
</tr>
<tr>
<td>XYZ / G90 / G91</td>
<td>
Three-axis positioning, including incremental positioning.
Rotary axes and TCP are unsupported.
</td>
</tr>
<tr>
<td>G2 / G3 / IJK</td>
<td>
ISO-M uses relative arc centers; native uses absolute
centers. Each arc follows its active controller mode.
</td>
</tr>
<tr>
<td>G54 P1–P48</td>
<td>
Extended work offsets. Source G54.1 and other decimal G
codes are rejected.
</td>
</tr>
<tr>
<td>G50 / G51</td>
<td>Coordinate scaling; G51 uses P/1000 weighting.</td>
</tr>
<tr>
<td>G68 / G69</td>
<td>
Standalone 2D rotation with G90, center axes of the active
plane and R. I/J/K, incremental-angle and 3D-vector forms
are rejected.
</td>
</tr>
<tr>
<td>Cycles and units</td>
<td>
Common integer milling G codes, unit selection, coordinate
systems and selected canned cycles are accepted within the
ISO-M subset.
</td>
</tr>
<tr>
<td>Macro B / ISO-T</td>
<td>
Macro B program flow and ISO Dialect T are unsupported.
Unsupported ISO functions produce diagnostics.
</td>
</tr>
</tbody>
</table>
</div>
</details>
<p class="note">
<a
href="https://github.com/MaestroFusion360/easy_gcode_plot/blob/main/FAQ.md#sinumerik-840d-input"
>Parameters and limitations in the FAQ →</a
>
</p>
</div>
<div class="controller-reference">
<h3>SINUMERIK 840D native — G290</h3>
<details class="code-table">
<summary>SINUMERIK native</summary>
<div
class="table-wrap"
role="region"
aria-label="SINUMERIK native"
tabindex="0"
>
<table>
<thead>
<tr>
<th scope="col">Native function</th>
<th scope="col">Current behavior</th>
</tr>
</thead>
<tbody>
<tr>
<td>
<code>G0/G1</code>, <code>G2/G3</code>,
<code>G17/G18/G19</code>
</td>
<td>
XYZ positioning, linear moves and arcs in the selected
plane; <code>CR=</code> radius arcs, including negative
radius for a major arc
</td>
</tr>
<tr>
<td>
<code>G90/G91</code>, <code>G54–G59</code>,
<code>G710</code>
</td>
<td>
Absolute/incremental coordinates, work offsets and metric
units
</td>
</tr>
<tr>
<td><code>G40/G41/G42</code></td>
<td>
Modeled cutter-radius compensation using the configured
tool
</td>
</tr>
<tr>
<td>
<code>T</code>, <code>M6</code>, <code>D0/D1</code>,
<code>S</code>, basic M codes
</td>
<td>
Tool change, modeled cutting-edge selection/cancellation,
spindle and coolant signals; controller-specific offset
tables are not simulated
</td>
</tr>
<tr>
<td><code>G0 SUPA ... D0</code></td>
<td>
Nonmodal machine-coordinate positioning;
<code>SUPA Z0</code> means machine zero, independently of
the configured home Z
</td>
</tr>
<tr>
<td>
<code>G64</code>, <code>MSG(...)</code>,
<code>WORKPIECE(...)</code>, <code>;</code> comments
</td>
<td>
Path-control/display metadata and comments; no blending or
stock geometry is generated from these declarations
</td>
</tr>
<tr>
<td><code>MCALL CYCLE81/82/83/84(...)</code></td>
<td>
Modal Z drilling/tapping in <code>G17/G40</code>,
triggered by subsequent XY blocks; bare
<code>MCALL</code> cancels the cycle
</td>