<p>I change the stepper driver and that helped.</p>
<p>One of the stepper driver was faulty.</p>

CC BY-SA 4.0
2023-08-11T02:27:05.820Z
Jens, may I ask what stepper driver you used as a replacement for your faulty driver module? What is the chip part number, or module name?
keith20mm
CC BY-SA 4.0
2023-08-11T08:40:44.017Z
Please mark your answer as the accepted answer, that way your question will no longer be in the unanswered list. Also, please use the [edit] link to fix errors in your answers, rather than adding the correction in the comments.
Greenonline
CC BY-SA 4.0
2018-08-08T15:30:29.177Z
2023-08-11T08:41:55.973Z
2023-08-11T08:41:55.973Z
Jens Thomsen
<p>Apparently your 3D printer runs <a href="https://reprap.org/forum/read.php?415,789291" rel="nofollow noreferrer">Marlin firmware</a>. Marlin firmware default code has build in protection against extrusion below a certain temperature (usually 170°C) as defined in the <a href="https://github.com/MarlinFirmware/Marlin/blob/1.1.x/Marlin/Configuration.h" rel="nofollow noreferrer">printer configuration</a>:</p>

<pre><code>// *** IT IS HIGHLY RECOMMENDED TO LEAVE THIS OPTION ENABLED! ***
#define PREVENT_COLD_EXTRUSION
#define EXTRUDE_MINTEMP 170 
</code></pre>

<p>Are you sure that it heats up above this temperature? Please check the connections of the thermistor and the heater cartridge.</p>

<p>Marlin firmware code supports disabling the cold extrusion safety measure by setting:</p>

<pre><code>M302 S0    ; Allow extrusion at any temperature
</code></pre>

<p>(save this line in a file with extension <code>gcode</code> and load and run it from an SD card or alternatively hook up your computer over USB to the printer and use an application like Pronterface, Repetier-Host, etc. to upload the command to the printer)</p>

<p>If cold extrusion safety is turned off, you should try to extrude (without loading filament) to test if the extruder works.</p>

<p>To revert use the following code:</p>

<pre><code>M302 S170  ; Allow extrusion above 170
</code></pre>

CC BY-SA 4.0
2018-06-11T23:20:50.590Z
2018-06-11T23:20:50.590Z
0scar
<p>I cannot get my extruder to work on my Creality Ender-4 printer. I have heated the nozzle but the extruder does not move.</p>

<p>I tested the motor and cable on another system and they work just fine.</p>

<p>Could it be the board or what could it be?</p>

<extruder><creality-ender-4>
Creality Ender 4 extruder problem
Jens Thomsen
# Creality Ender 4 extruder problem

(Asked by: username_0 on 2018-06-11)

I cannot get my extruder to work on my Creality Ender-4 printer. I have heated the nozzle but the extruder does not move.

I tested the motor and cable on another system and they work just fine.

Could it be the board or what could it be?

**Tags:** extruder, creality-ender-4

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## 2 answers

### Answer by username_0 on 2018-08-08. Score: 2

I change the stepper driver and that helped.

One of the stepper driver was faulty.

> **Comments:**
> **username_1**: Jens, may I ask what stepper driver you used as a replacement for your faulty driver module? What is the chip part number, or module name?  
> **username_2**: Please mark your answer as the accepted answer, that way your question will no longer be in the unanswered list. Also, please use the [edit] link to fix errors in your answers, rather than adding the correction in the comments.  

---

### Answer by username_3 on 2018-06-11. Score: 2

Apparently your 3D printer runs Marlin firmware. Marlin firmware default code has build in protection against extrusion below a certain temperature (usually 170°C) as defined in the printer configuration:
// *** IT IS HIGHLY RECOMMENDED TO LEAVE THIS OPTION ENABLED! ***
#define PREVENT_COLD_EXTRUSION
#define EXTRUDE_MINTEMP 170 

Are you sure that it heats up above this temperature? Please check the connections of the thermistor and the heater cartridge.
Marlin firmware code supports disabling the cold extrusion safety measure by setting:
M302 S0    ; Allow extrusion at any temperature

(save this line in a file with extension gcode and load and run it from an SD card or alternatively hook up your computer over USB to the printer and use an application like Pronterface, Repetier-Host, etc. to upload the command to the printer)
If cold extrusion safety is turned off, you should try to extrude (without loading filament) to test if the extruder works.
To revert use the following code:
M302 S170  ; Allow extrusion above 170


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