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Hot End Not Heating Up

Posted by gmckee 
Hot End Not Heating Up
May 07, 2015 09:50PM
I may have put this topic in the wrong place and I apologize but I am having hotend issues. When I go to heat the hotend up in preparation for printing the temperature remains the same. Reading the output voltage on the Ramps 1.4 is showing 0 volts when the hotend is turned on. All motor, fan, and heated bed are working fine. I am really looking forward to my first print, and this is my last issue... hopefully. I am using a Ramps 1.4 in the EFB cofiguration. Thank.Thank you in advance.
Re: Hot End Not Heating Up
May 08, 2015 08:37AM
1. Is the hot end LED on?
2. Measure between the hot end + terminal and the - terminal of your power supply. What's your voltage there?
3. When the hot end should be on, what's the voltage between power supply - and the gate pin on the mosfet? The gate pin is the pin closest to the stepper drivers or polyfuse depending on which one you're measuring.
Re: Hot End Not Heating Up
May 08, 2015 09:09AM
I'll have to check when I get done with school Today.
Re: Hot End Not Heating Up
May 08, 2015 04:21PM
Ok, when I tilted the MOSFET closest to the extruder motor driver the led came on and the power supply came on and began drawing power. It quickly began heating up. I guess I will order new MOSFETS just in case. For your questions.

Before tilt
1) No
3)5v near outside, 0 near fuses

After tilt
2)12 v
3)My hotend MOSFET pins detached
Re: Hot End Not Heating Up
May 08, 2015 04:25PM
Elaborating on part 3, the pins snapped off of the board. Where should I purchase a new MOSFET?
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