Hello RepRapers, I am testing latest released Marlin FW 1.0.2 in my 3D printer. My printer is monitored by OctoPrint, but I always print from SD card. Today, I spotted strange behaviour of my nozzle temperature - when there was a lot of small moves (high resolution cirle, etc.) the temperature felt down from 230°C to 170°C on OctoPrint graph. There was "Cold extrusion prevented" in serial log too. After this anomally, nozzle heated up again. I spotted this behaviour first time, NTC thermistor is OK. Other prints temperature regulation is rock-stable (+/- 0.5°C). I think that the processor have no more time to handle temperature regulation when there is high GCODE command flow. Do anybody have the same issue? :) Regards! Smart - O.C. https://reprap.org/forum/read.php?147,502843,502843#msg-502843 Sun, 19 Apr 2026 17:11:55 -0400 Phorum 5.2.23 https://reprap.org/forum/read.php?147,502843,503595#msg-503595 https://reprap.org/forum/read.php?147,502843,503595#msg-503595 so finally I have found my problem source - it was thermistor wiring, cable was broken from bending by carriage movement :-(

I will upgrade my Marlin release too, the only problem is, that somebody already programmed code for run of filament detection, which I already have for a long time, so I will need to compare both new and my old code to rewrite my function into new version.

Regards!
O.C.]]> Smart Firmware - experimental, borrowed, and future Thu, 30 Apr 2015 07:48:18 -0400 https://reprap.org/forum/read.php?147,502843,503263#msg-503263 https://reprap.org/forum/read.php?147,502843,503263#msg-503263 Wurstnase Firmware - experimental, borrowed, and future Wed, 29 Apr 2015 09:05:40 -0400 https://reprap.org/forum/read.php?147,502843,503158#msg-503158 https://reprap.org/forum/read.php?147,502843,503158#msg-503158 thanks for your answers! My printer have Graphical RepRapDiscount LCD.
What type of printer do you mean dc42? It is based on open-source project, but mime and friends built: www.poseidon3d.cz

Idea with "the same spot on the bed" looks great, I will check it - thanks!
I have checked all thermistor connectios and it looks OK. I will check it once again with heating block too and give a message ;-)

Regards]]> Smart Firmware - experimental, borrowed, and future Wed, 29 Apr 2015 04:09:03 -0400 https://reprap.org/forum/read.php?147,502843,502996#msg-502996 https://reprap.org/forum/read.php?147,502843,502996#msg-502996
The first time this happened to me, it seemed random, but then I realized it was always near the same spot on the bed. I eventually traced it to a broken solder connection. Hopefully it's something that simple for you.]]> jbernardis Firmware - experimental, borrowed, and future Tue, 28 Apr 2015 17:02:37 -0400 https://reprap.org/forum/read.php?147,502843,502880#msg-502880 https://reprap.org/forum/read.php?147,502843,502880#msg-502880 dc42 Firmware - experimental, borrowed, and future Tue, 28 Apr 2015 12:15:29 -0400 https://reprap.org/forum/read.php?147,502843,502843#msg-502843 https://reprap.org/forum/read.php?147,502843,502843#msg-502843 I am testing latest released Marlin FW 1.0.2 in my 3D printer. My printer is monitored by OctoPrint, but I always print from SD card. Today, I spotted strange behaviour of my nozzle temperature - when there was a lot of small moves (high resolution cirle, etc.) the temperature felt down from 230°C to 170°C on OctoPrint graph. There was "Cold extrusion prevented" in serial log too. After this anomally, nozzle heated up again. I spotted this behaviour first time, NTC thermistor is OK. Other prints temperature regulation is rock-stable (+/- 0.5°C).

I think that the processor have no more time to handle temperature regulation when there is high GCODE command flow.

Do anybody have the same issue? :)

Regards!
Smart - O.C.]]> Smart Firmware - experimental, borrowed, and future Tue, 28 Apr 2015 10:19:13 -0400