<p>Hello I am building a clone of Prusa MK2. So I connected all the connections to the RAMPS 1.4 shield. I used Pronterface successfully to set the temperature of bed, but it did not heat up... So I tested the RAMPS D8 D9 connectors which showed 2 volts and D10 measures 12 volts. I replaced the MOSFETs and now it shows 4 volts. I also tested my heated bed. The + and - terminals measure 2.2-2.3 Ohms, and the multimeter beeps when I test for continuity and measures 0.5 Ohm.</p>
<p>Can someone help me what the issues are?</p>
<p><a href="https://i.sstatic.net/OIiTm.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/OIiTm.jpg" alt="enter image description here" /></a>
<a href="https://i.sstatic.net/fzJaO.jpg" rel="nofollow noreferrer"><img src="https://i.sstatic.net/fzJaO.jpg" alt="enter image description here" /></a></p>

CC BY-SA 4.0
2020-09-09T12:30:07.607Z
How can you measure a resistance without continuity? A heated bed will have a resistance in the order of 1 to 2-ish Ohms, so that should be okay.
0scar
CC BY-SA 4.0
2020-09-09T12:49:15.143Z
I have shown you the image. When i test for continuity it measures 0.5 ohm and now it beeps
usman siddique
<heated-bed><ramps-1.4>
Heated bed is not heating up
usman siddique
# Heated bed is not heating up

(Asked by: username_0 on 2020-09-09)

Hello I am building a clone of Prusa MK2. So I connected all the connections to the RAMPS 1.4 shield. I used Pronterface successfully to set the temperature of bed, but it did not heat up... So I tested the RAMPS D8 D9 connectors which showed 2 volts and D10 measures 12 volts. I replaced the MOSFETs and now it shows 4 volts. I also tested my heated bed. The + and - terminals measure 2.2-2.3 Ohms, and the multimeter beeps when I test for continuity and measures 0.5 Ohm.

Can someone help me what the issues are?

[![enter image description here](https://i.sstatic.net/OIiTm.jpg)](https://i.sstatic.net/OIiTm.jpg)
[![enter image description here](https://i.sstatic.net/fzJaO.jpg)](https://i.sstatic.net/fzJaO.jpg)

**Tags:** heated-bed, ramps-1.4
> **Comments:**
> **username_1**: How can you measure a resistance without continuity? A heated bed will have a resistance in the order of 1 to 2-ish Ohms, so that should be okay.  
> **username_0**: I have shown you the image. When i test for continuity it measures 0.5 ohm and now it beeps  

---

## 0 answers

