<p>I'm running the autotune PID because I had to replace the hotend. The command that I launch is <code>M303 E0 S200 C9</code>. But from the temperature chart I see that he has only made two cycles, after which the autotune control seems to have gone mad and has remained stable on 213° C and is no longer doing autotune cycles. After a while I get <code>Recv: PID Autotune failed! timeout</code>.</p>

<p>I am using Marlin Firmware version 2.0.3 (GitHub) installed on a MKS Gen v1.4 (Arduino MEGA 2560) board. The MKS Gen board replaces the original one of a Geeetech Prusa i3 Pro B. Hotend is 12V.</p>

<p>Do you have any suggestions? Has anyone experienced something like this?</p>

<p><a href="https://i.sstatic.net/8mamw.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/8mamw.png" alt="enter image description here"></a></p>

<hr>

<p>UPDATE:</p>

<p>I redo the PID Autotune and now I get a sawtooth:</p>

<p><a href="https://i.sstatic.net/usnTG.png" rel="nofollow noreferrer"><img src="https://i.sstatic.net/usnTG.png" alt="enter image description here"></a></p>

CC BY-SA 4.0
2020-03-10T17:09:57.037Z
sawtooth is good, it is rather close, though... not close enough. maybe tune with ess than 9 cycles? 3 to 5?
Trish
CC BY-SA 4.0
2020-03-10T17:25:57.337Z
I am giving a try using 3 cycles.
kitsune
<calibration><hotend><pid>
PID Autotune not working properly
kitsune
# PID Autotune not working properly

(Asked by: username_0 on 2020-03-10)

I'm running the autotune PID because I had to replace the hotend. The command that I launch is `M303 E0 S200 C9`. But from the temperature chart I see that he has only made two cycles, after which the autotune control seems to have gone mad and has remained stable on 213° C and is no longer doing autotune cycles. After a while I get `Recv: PID Autotune failed! timeout`.

I am using Marlin Firmware version 2.0.3 (GitHub) installed on a MKS Gen v1.4 (Arduino MEGA 2560) board. The MKS Gen board replaces the original one of a Geeetech Prusa i3 Pro B. Hotend is 12V.

Do you have any suggestions? Has anyone experienced something like this?

[![enter image description here](https://i.sstatic.net/8mamw.png)](https://i.sstatic.net/8mamw.png)

---

UPDATE:

I redo the PID Autotune and now I get a sawtooth:

[![enter image description here](https://i.sstatic.net/usnTG.png)](https://i.sstatic.net/usnTG.png)

**Tags:** calibration, hotend, pid

> **Comments:**
> **username_1**: sawtooth is good, it is rather close, though... not close enough. maybe tune with ess than 9 cycles? 3 to 5?  
> **username_0**: I am giving a try using 3 cycles.  

---

## 0 answers

