<p>Without knowing exactly which Youtube videos you've looked at, I think where I would start is by downloading the latest Marlin Fimrware and configuration files for the Ender 3 with 4.2.7 board:</p>
<p><a href="https://github.com/MarlinFirmware/Marlin/archive/2.0.x.zip" rel="nofollow noreferrer">Latest Release of Marlin Firmware on Github</a></p>
<p><a href="https://github.com/MarlinFirmware/Configurations/tree/release-2.0.7.2/config/examples/Creality/Ender-3%20V2" rel="nofollow noreferrer">Configuration File Repository on Github</a></p>
<p><a href="https://code.visualstudio.com/download" rel="nofollow noreferrer">Microsoft visual Studio</a></p>
<p><a href="https://platformio.org/install/ide?install=vscode" rel="nofollow noreferrer">PlatormIO</a></p>
<p>If I were doing your upgrade in your place, I would refer to <a href="https://www.youtube.com/watch?v=neS7lB7fCww&amp;t=495s" rel="nofollow noreferrer">this video</a> for how to compile the firmware for the correct board. I've had to compile firmware for my Ender 3 a few times and I sometimes forget a step. This video is the best that I've found for showing/reminding me of each step.</p>
<p>Essentially, what I think you need to do is compile your firmware as if it were a stock Ender 3 V2 using the settings files I linked above but then change your print area the configuration.h file to match the X400 x Y400 x Z500 print bed area.</p>
<p>Look for the following:</p>
<pre><code>// The size of the print bed
#define X_BED_SIZE 200
#define Y_BED_SIZE 200
</code></pre>
<p>Change to the following:</p>
<pre><code>// The size of the print bed
#define X_BED_SIZE 400
#define Y_BED_SIZE 400
</code></pre>
<p>And then look for</p>
<pre><code>#define Z_MAX_POS 200
</code></pre>
<p>and change to:</p>
<pre><code>#define Z_MAX_POS 500
</code></pre>
<p>There are other changes you'd need to make to the settings file (refer to the video for those). I haven't done your particular upgrade on my machine, so I'm just guessing those extra couple of changes would work for you.</p>

CC BY-SA 4.0
2024-12-24T22:51:49.393Z
Current .bin files won't open in a recognizable format. What am I missing? I've followed the steps above and got issues, I made similar changes to my E3V2 and am trying to modify the allowable Z range.
Brandon Kammer
CC BY-SA 4.0
2021-03-26T21:46:29.660Z
2021-03-27T06:40:02.723Z
2021-03-27T06:40:02.723Z
Rykara
<p>Shortly after my post I found <a href="https://marlin.crc.id.au/" rel="nofollow noreferrer">this commercial Marlin site</a><sup> <em>1)</em></sup>. It offers firmware for Creality &amp; other printers. You can order 'off the shelf' firmware or customize it yourself. Customizing is quite easy &amp; self explanatory; 5 min. after submitting my requirements, I received a zip file, which I un-zipped &amp; copied the needed file to my SD card. Then I inserted the SD card into my printer &amp; started it. The printer recognized the new firmware &amp; updated its self.</p>
<hr />
<p><sup><em>1)</em></sup> <em>This service is not free. Membership of \$15.00/year, is required.</em></p>

CC BY-SA 4.0
2021-03-27T09:05:29.917Z
You have to have a yearlong membership for a one-time download?
Rykara
CC BY-SA 4.0
2021-03-27T10:40:51.230Z
Many thanks for answering your own question. Getting someone else to do the configuration for you is also an option which I myself never considered. But, for those on a tight budget, there are multiple sources that deliver the correct configuration for the Ender 3, the only difference is the larger printer volume dimensions, this is covered in [this answer](/a/15957). Please consider the other answers before accepting one. Thanks, happy printing!
0scar
CC BY-SA 4.0
2021-03-27T08:59:15.547Z
2021-03-27T10:48:31.433Z
2021-03-27T10:48:31.433Z
LarryHills
<p>A quick solution is obtaining a pre configured configuration file for this custom extended version of the Ender 3. While it should be very easy to find configurations for Ender 3 with or without BLTouch, the only difference this extension has is an updated printer volume specification. A ready made configuration is found <a href="https://github.com/teachingtechYT/Marlin/blob/Ender3-V2-BLtouch-extender/Marlin/Configuration.h" rel="nofollow noreferrer">here</a> (please note that it contains an errand for the maximum build height, change <code>#define Z_MAX_POS 250</code> to <code>#define Z_MAX_POS 500</code>.</p>
<p>The basic changes are:</p>
<pre><code>// The size of the print bed
#define X_BED_SIZE 400
#define Y_BED_SIZE 400

#define Z_MAX_POS 500
</code></pre>

CC BY-SA 4.0
2021-04-11T06:39:35.483Z
2024-12-25T23:28:36.290Z
2024-12-25T23:28:36.290Z
0scar
<p>I've done the board upgrade on my Ender 3 Pro. As I've read the BLTouch is easy to install. I'd go over to the Creality <a href="https://forums.creality3dofficial.com/" rel="nofollow noreferrer">forum/help</a> site. You can open a support ticket.  They actively have information on firmware in both &quot;release&quot; and &quot;beta&quot; threads.  Look there &amp; see if you can get your answers.</p>

CC BY-SA 4.0
2021-03-26T19:09:54.437Z
2021-03-27T02:04:50.303Z
2021-03-27T02:04:50.303Z
Joel Huebner
<p>I've updated my Ender 3 with V4.2.7 mainboard, BLTouch and 400XL kit (extends the capabilities of your Creality Ender 3 3D Printer to a 400 mm X, 400 mm Y and a 500 mm Z printing platform). Now I need to update the firmware. YouTube did not provide any help: i.e.: out of date, so cryptic as to be unusable. Marlin &amp; Creality had overly complicated, for what I need, solutions. Trying these led only to frustrations! Any ideas?</p>

<creality-ender-3><firmware><400xl>
How do I update my firmware after installing a 400XL kit on my Ender 3
LarryHills
# How do I update my firmware after installing a 400XL kit on my Ender 3

(Asked by: username_0 on 2021-03-26)

I've updated my Ender 3 with V4.2.7 mainboard, BLTouch and 400XL kit (extends the capabilities of your Creality Ender 3 3D Printer to a 400 mm X, 400 mm Y and a 500 mm Z printing platform). Now I need to update the firmware. YouTube did not provide any help: i.e.: out of date, so cryptic as to be unusable. Marlin & Creality had overly complicated, for what I need, solutions. Trying these led only to frustrations! Any ideas?

**Tags:** creality-ender-3, firmware, 400xl

---

## 4 answers

### Answer by username_1 on 2021-03-26. Score: 4

Without knowing exactly which Youtube videos you've looked at, I think where I would start is by downloading the latest Marlin Fimrware and configuration files for the Ender 3 with 4.2.7 board:
Latest Release of Marlin Firmware on Github
Configuration File Repository on Github
Microsoft visual Studio
PlatormIO
If I were doing your upgrade in your place, I would refer to this video for how to compile the firmware for the correct board. I've had to compile firmware for my Ender 3 a few times and I sometimes forget a step. This video is the best that I've found for showing/reminding me of each step.
Essentially, what I think you need to do is compile your firmware as if it were a stock Ender 3 V2 using the settings files I linked above but then change your print area the configuration.h file to match the X400 x Y400 x Z500 print bed area.
Look for the following:
// The size of the print bed
#define X_BED_SIZE 200
#define Y_BED_SIZE 200

Change to the following:
// The size of the print bed
#define X_BED_SIZE 400
#define Y_BED_SIZE 400

And then look for
#define Z_MAX_POS 200

and change to:
#define Z_MAX_POS 500

There are other changes you'd need to make to the settings file (refer to the video for those). I haven't done your particular upgrade on my machine, so I'm just guessing those extra couple of changes would work for you.

> **Comments:**
> **username_2**: Current .bin files won't open in a recognizable format. What am I missing? I've followed the steps above and got issues, I made similar changes to my E3V2 and am trying to modify the allowable Z range.  

---

### Answer by username_0 on 2021-03-27. Score: 1

Shortly after my post I found [this commercial Marlin site](https://marlin.crc.id.au/) *1)*. It offers firmware for Creality & other printers. You can order 'off the shelf' firmware or customize it yourself. Customizing is quite easy & self explanatory; 5 min. after submitting my requirements, I received a zip file, which I un-zipped & copied the needed file to my SD card. Then I inserted the SD card into my printer & started it. The printer recognized the new firmware & updated its self.

---

*1)* *This service is not free. Membership of \$15.00/year, is required.*

> **Comments:**
> **username_1**: You have to have a yearlong membership for a one-time download?  
> **username_3**: Many thanks for answering your own question. Getting someone else to do the configuration for you is also an option which I myself never considered. But, for those on a tight budget, there are multiple sources that deliver the correct configuration for the Ender 3, the only difference is the larger printer volume dimensions, this is covered in [this answer](/a/15957). Please consider the other answers before accepting one. Thanks, happy printing!  

---

### Answer by username_3 on 2021-04-11. Score: 1

A quick solution is obtaining a pre configured configuration file for this custom extended version of the Ender 3. While it should be very easy to find configurations for Ender 3 with or without BLTouch, the only difference this extension has is an updated printer volume specification. A ready made configuration is found here (please note that it contains an errand for the maximum build height, change #define Z_MAX_POS 250 to #define Z_MAX_POS 500.
The basic changes are:
// The size of the print bed
#define X_BED_SIZE 400
#define Y_BED_SIZE 400

#define Z_MAX_POS 500


---

### Answer by username_4 on 2021-03-26. Score: 1

I've done the board upgrade on my Ender 3 Pro. As I've read the BLTouch is easy to install. I'd go over to the Creality [forum/help](https://forums.creality3dofficial.com/) site. You can open a support ticket. They actively have information on firmware in both "release" and "beta" threads. Look there & see if you can get your answers.


---

