Questions tagged [thermistor]

The thermistor is an electronic component commonly used to sense temperature.

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Problem with temperature readings after Marlin upgrade

I have an Ender-3 that I've been using daily for almost 2 years. Yesterday, I updated the firmware to Marlin 1.1.9.1, using the configuration files provided for the Ender-3. I printed out a few ...
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29 views

How is a Thermistor supposed to be installed between Heated Bed and the Glass?

opposed to what the title of this question might impose, I'm not new to 3d printing itself and have operated more than one printer for years, however, I feel dumb with installing the Thermistor on ...
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39 views

How to control 4 thermistors in a heated bed?

My print area is ~ 17x16 inches (431.8 mm x 406.4 mm = 175,158.4 mm/2). To that end I need four (4) 200mm square heaters, and associated mosfets to run it. Each heater has it's own thermistor and can ...
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15 views

Disable Marlin PID, and start print manual

The thermistor of the hotend of my printer broke, at the moment I have no way to replace it, due to the global situation with the virus. In my hands I have one of these industrial PIDs which is ...
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316 views

Ender 3 overshot the set temperature and hitting MAX TEMP error

So for the past few months I have been printing in my Ender 3 and everything ran smoothly. But suddenly a few days ago I tried to print and the hot end temperature just keeps on rising past the set ...
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166 views

Is there any way to correct uneven bed temperature?

I'm using an Ender 3 Pro with stock heated bed & glass build surface on it (without any base of stock magnetic plate). My heated bed looks completely flat too despite of many uneven Ender 3 heated ...
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204 views

SKR 1.3 Thermistor input died

I've got an SKR 1.3 and the thermistor input for extruder 2 has gone bad. In firmware, I've attempted to change the TEMP_1_PIN to another in ...
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2answers
136 views

Hotend doesn't maintain temperature

I got an Anycubic Predator last month, and after resolving a few mechanical problems, I was able to get it printing decently well. The only significant modification I've made so far is a set of 8-...
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184 views

Weird temperature graph and thermal runaway protection triggered

I woke up this morning with my 20 hour long print failed around 15 hour in. I checked the octoprint console, and saw a very weird temperature graph. Later found out thermal runaway protection kicked ...
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2k views

Ender 3 displaying wrong temperatures for hotend and bed

I've had issues with my hot end and decided to replace the whole assembly with this. After the replacement, my printer started reading about 135/185 °C for the hot end and bed are both at ...
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556 views

Thermal runaway with specific prints

I have been experimenting with PETG on my CR-10 upgraded with an E3D all-metal hot end and Marlin firmware on the controller. I am printing with 0.8 mm nozzle at 250 °C and an 85 &...
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Weird temperature reading using thermistor on MKS GEN L v1.0 AUX-2 analog pins

Temperature is showing about 680 °C at room temperature. When I make it "hotter" by holding my thumb and index finger on it, the temperature does increase. So it is responding to temperature ...
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How does Prusa3D firmware respond to an open or shorted thermistor during a print?

I have a Prusa3D i3m3s. The problem occurred once before with firmware 3.6.1. Last night I upgraded to firmware 3.7.1 and repeated the problem almost exactly. The symptom is that at what appears to ...
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714 views

Change hotend thermistor input in Marlin

I have a Marlin driven Prusa i3 clone, by accident I cut through both thermistor wires for the hotend while it was powered on. The Arduino reset and the hotend thermistor no longer work. Since there ...
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369 views

How to decrease sensitivity to heat-bed temperature?

Sometimes I use a DIY 3D printer running Marlin firmware and I have a hard time to set my heat bed temperature. when I set it to 70 °C for PLA, after a few minutes it decreases to 67 &...
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547 views

Hotend heating failure too short before limit

I am trying to resolve this for months and have tried almost everything, I guess. I am using Marlin firmware on a custom extruder with a custom fabricated heating block in which heater and thermistor ...
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1answer
401 views

Thermister stops reading temp after a few seconds. (Marlin 1.1.8, Tronxy X5s stock Melzi board)

I think it's best that I explain what my issue is before I explain how I arrived here. I have a Tronxy x5s with a stock board that I am repairing for the sake of repairing, even though I know I should ...
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250 views

RAMPS PLUS 2 and E1 socket problem (K200 Delta, but related to the PCB , not printer)

Total 3D printing newbie here, apologies in advance if my terminology is wrong. I have a dual head K200 delta printer with a heated bed which I put together 8 months ago, but gave up due to ...
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2answers
843 views

MK8 extruder showing 500+ °C on temperature sensor?

I just finish building a Graber i3 printer from mixed parts (a MDF clone of Prusa i3 MK2). For the hotend, I've bought the Greetech MK8 extruder. However, the temperature sensor is driving me up the ...
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82 views

RAMPS won't PID tune and shows unreal temps

About two days ago, I started seeing that my hotend was heating up erratically. I first noticed this while printing a part in PETG and the temp jumped to 260 °C. I shut down the printer at that ...
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2answers
3k views

Anet A8 reading 739°C from the extruder thermistor!

I accidentally let the print head of my Anet A8 crash into one of 2 clips that are holding a glass sheet onto the hot bed, and suddenly the screen went blank and the printer rebooted, then it started ...
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2k views

How can I insulate my thermistor?

I have had many problems with my heat shrink for the thermostat on my Anet A8 melting from the heat block. Is there a way I can insulate my wires from heat but still have enough room to put the ...
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258 views

New thermistor isolation, how?

We are trying to repair an Ultimaker Original+. One problem is a missing resistor isolation. The Ultimaker Original+ prints with up to 260 Degree Celcius. Which kind of isolation products are ...
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187 views

MINTEMP error after crash

I just got my HICTOP Prusa i3 Aluminium frame printer and finished putting it together. After setting it to preheat, I realized the bed was not level - I adjusted it and accidentally caused the head ...
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8k views

Marlin temperature sensor problem

I have a RAMPS 1.4 and an Arduino Mega 2560. The problem is with 100k NTC thermistor. I've tested it with a multimeter, it results in ~122kΩ. I am using Marlin 1.0.2 (latest stable). I am using ...
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3k views

Heated bed thermistor placement

I just recently upgraded my Printrbot Simple Metal with a heated bed (and longer x-axis). I looked up some tutorials, and all of them placed the thermistor as in the picture on the left below, so I ...
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32 views

Are the thermsistors identical for both the heatbed and the extruder head?

I'm aware of two thermsistors in the Prusia i3 Rework. Are they the same? And if not, how do you tell them apart?
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2k views

What kind of silicone glue should I use to attach my thermsistors?

I was watching a couple of videos about installing a Thermistor on the heat-bed and extruder of my Prusa i3; both videos mentioned that if I use either Sodium Silicate (Muffler & Tail Pipe Sealer) ...
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3answers
369 views

Stainless tip for thermistor

I would like to secure my hotend thermistor in a more reliable way (now it is just thermistor plugged in the hotend :D). I want to have a stainless steel tip for it to fix it inside hotend with a ...
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900 views

E3D Thermistor Alternative

E3D hotends use a thermistor whose legs are insulated with glass fiber sleeving and clamped down with a screw and washer: This solution enables the printing of high temperature materials, but it's a ...