<p>There are software limits that might be set low by default depending on the software you are using. I know there is with Marlin.</p>

CC BY-SA 3.0
2016-11-29T20:37:49.243Z
2016-11-29T20:37:49.243Z
zkent
<p>Usually, this kind of problem is due to an issue with the control loop of the temperature. You can try to do <a href="http://reprap.org/wiki/PID_Tuning" rel="noreferrer">PID Tuning</a> by running the command <code>M303 E0 S200 C8</code>. This will heat up the hot end and cycle it around 200C a few times, and afterwards tell you Kp, Ki and Kd values which you need to enter into the PID settings of your firmware configuration, or store them in EEPROM using <code>M301</code>.</p>

<p>If this does not solve the problem, then disconnect the heater cartridge and check its resistance with a multimeter. For a 12V system, it should not be higher than 6Ω (24Ω for a 24V system).</p>

<p>If the heater cartridge is okay, then perhaps it is a problem with the power supply. While the hotend is heating up, measure the voltage across the heater cartridge. It should not be much less than the nominal 12V/24V your printer runs at. If it is, you may have a bad MOSFET or power supply.</p>

<p>Finally, if you have a very powerful fan blowing on the hotend this can cause issues with heating up as well. Adding a fan shroud (or pointing the fan away from the nozzle and only at the print) can help with this.</p>

CC BY-SA 3.0
2016-09-20T16:46:12.993Z
2016-09-20T16:46:12.993Z
Tom van der Zanden
<p>I recently finished building my first printer. The only problem that I'm having is that the hotend is not getting hot enough to start printing with PLA (180 to 230 degrees celsius), the hotend getting hotter stops at 170 degrees. Please help I've been stuck on this problem for days. Thanks in advance.</p>

<pla><prusa-i3><hotend>
Prusa i3 hotend not getting to the temperature that I want (180 to 230 celsius)
Andoni Zubizarreta
# Prusa i3 hotend not getting to the temperature that I want (180 to 230 celsius)

(Asked by: username_0 on 2016-09-20)

I recently finished building my first printer. The only problem that I'm having is that the hotend is not getting hot enough to start printing with PLA (180 to 230 degrees celsius), the hotend getting hotter stops at 170 degrees. Please help I've been stuck on this problem for days. Thanks in advance.

**Tags:** pla, prusa-i3, hotend

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## 2 answers

### Answer by username_2 on 2016-09-20. Score: 7 | Accepted answer

Usually, this kind of problem is due to an issue with the control loop of the temperature. You can try to do [PID Tuning](http://reprap.org/wiki/PID_Tuning) by running the command `M303 E0 S200 C8`. This will heat up the hot end and cycle it around 200C a few times, and afterwards tell you Kp, Ki and Kd values which you need to enter into the PID settings of your firmware configuration, or store them in EEPROM using `M301`.

If this does not solve the problem, then disconnect the heater cartridge and check its resistance with a multimeter. For a 12V system, it should not be higher than 6Ω (24Ω for a 24V system).

If the heater cartridge is okay, then perhaps it is a problem with the power supply. While the hotend is heating up, measure the voltage across the heater cartridge. It should not be much less than the nominal 12V/24V your printer runs at. If it is, you may have a bad MOSFET or power supply.

Finally, if you have a very powerful fan blowing on the hotend this can cause issues with heating up as well. Adding a fan shroud (or pointing the fan away from the nozzle and only at the print) can help with this.


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### Answer by username_1 on 2016-11-29. Score: 0

There are software limits that might be set low by default depending on the software you are using. I know there is with Marlin.


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