[Hotend fried Ramps 1.4]
May 19, 2015 10:39PM
Im connecting a standard heating cartridge into a ramps 1.4.

Something like:

I plugged my cartridge into d10 and thermistor into t0, powered on and fried a fuse. So, do I need a resistor connected to my hotend wires?

Edited 1 time(s). Last edit at 05/19/2015 10:40PM by 3dmi.
Re: [Hotend fried Ramps 1.4]
May 20, 2015 02:20AM
Is it a 40W cartridge for 12V?
How long did it take to blow the fuse?

A resistor in series would get very hot.
Re: [Hotend fried Ramps 1.4]
May 25, 2015 02:22PM
I believe so, but I will have to check when I get a chance on Wednesday.

Started to see smoke almost instantly. Unplugged everything and felt the fuse and it was hot.
Re: [Hotend fried Ramps 1.4]
May 25, 2015 02:30PM
Sounds like you have a short between the wires to the heater.

Large delta printer [miscsolutions.wordpress.com], E3D tool changer, Robotdigg SCARA printer, Crane Quad and Ormerod

Disclosure: I design Duet electronics and work on RepRapFirmware, [duet3d.com].
Re: [Hotend fried Ramps 1.4]
May 25, 2015 05:45PM
Make sure that the heatsinks of the MOSFETs for the nozzle heater and bed heater aren't touching.
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