<p>I have issues with momentarily temperature spikes, but only above 250 °C. At and below 250 °C it's pretty solid.</p>
<p>I'm using Prusa MK3s+ with a E3D Revo upgrade.</p>
<p>I suspected connector issues as described in <a href="https://3dprinting.stackexchange.com/q/16154/20803">Random hot-end temperature spikes</a> but in my case, the reported temperature spikes up, then compensates down - exactly opposite to what Space Faring Or Bust reported. Also, my issue happens only at specific temperatures. Connectors on both ends of a cable look good. I don't recall it happening earlier, on my old V6 hotend.</p>
<p>A side question is, are these even real? Or just a read error or a display artifact?</p>
<p>I cut the connector off and re-crimped it, but it didn't help, it looks exactly as it did before.</p>
<p><a href="https://i.sstatic.net/FxW5f.png" rel="nofollow noreferrer" title="Screenshot of Octoprint's temperature graph showing spikes for the hotend"><img src="https://i.sstatic.net/FxW5f.png" alt="Screenshot of Octoprint's temperature graph showing spikes for the hotend" title="Screenshot of Octoprint's temperature graph showing spikes for the hotend" /></a></p>

CC BY-SA 4.0
2024-01-05T22:22:58.563Z
Faulty sensor? Is your firmware using MPC or PID for nozzle temperature control? Is it (auto) tuned?
Bob Ortiz
CC BY-SA 4.0
2024-01-05T22:39:18.747Z
@BobOrtiz PID and it was tuned. I ordered new heater (revo uses heaters with built-in sensors) so I'll be able to try different one in a week or so.
Mołot
CC BY-SA 4.0
2024-01-05T22:42:41.573Z
Maybe far fetched and would probably give more issues but faulty power supply and power spikes?
Bob Ortiz
CC BY-SA 4.0
2024-01-05T22:56:00.573Z
I'd love to know how to test that. I don't have spares. It might make sense as it only happens with higher power consumption.
Mołot
<prusa-i3><temperature><e3d-revo>
What issue can make very short temperature spikes to appear?
Mołot
# What issue can make very short temperature spikes to appear?

(Asked by: username_0 on 2024-01-05)

I have issues with momentarily temperature spikes, but only above 250 °C. At and below 250 °C it's pretty solid.

I'm using Prusa MK3s+ with a E3D Revo upgrade.

I suspected connector issues as described in [Random hot-end temperature spikes](https://3dprinting.stackexchange.com/q/16154/20803) but in my case, the reported temperature spikes up, then compensates down - exactly opposite to what Space Faring Or Bust reported. Also, my issue happens only at specific temperatures. Connectors on both ends of a cable look good. I don't recall it happening earlier, on my old V6 hotend.

A side question is, are these even real? Or just a read error or a display artifact?

I cut the connector off and re-crimped it, but it didn't help, it looks exactly as it did before.

[![Screenshot of Octoprint's temperature graph showing spikes for the hotend](https://i.sstatic.net/FxW5f.png "Screenshot of Octoprint's temperature graph showing spikes for the hotend")](https://i.sstatic.net/FxW5f.png "Screenshot of Octoprint's temperature graph showing spikes for the hotend")

**Tags:** prusa-i3, temperature, e3d-revo

> **Comments:**
> **username_1**: Faulty sensor? Is your firmware using MPC or PID for nozzle temperature control? Is it (auto) tuned?  
> **username_0**: @username_1 PID and it was tuned. I ordered new heater (revo uses heaters with built-in sensors) so I'll be able to try different one in a week or so.  
> **username_1**: Maybe far fetched and would probably give more issues but faulty power supply and power spikes?  
> **username_0**: I'd love to know how to test that. I don't have spares. It might make sense as it only happens with higher power consumption.  

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## 0 answers

