RAMPS 1.4 heatbed and fuse problem April 04, 2014 04:48AM |
Registered: 10 years ago Posts: 3 |
Re: RAMPS 1.4 heatbed and fuse problem April 04, 2014 06:53AM |
Registered: 10 years ago Posts: 41 |
Re: RAMPS 1.4 heatbed and fuse problem April 04, 2014 10:34AM |
Registered: 10 years ago Posts: 869 |
That makes absolutely no sense. Fuses don't work more or less.Quote
Dodgey99
In the end it turned out I was running my power supply at the limit and it would no longer provide enough current. I switched to a beefier PSU and the fuse is cold and everything is perfect. As I'm now providing a lot more current I guess the fuse has to work less.
Re: RAMPS 1.4 heatbed and fuse problem April 04, 2014 06:10PM |
Registered: 14 years ago Posts: 1,092 |
Re: RAMPS 1.4 heatbed and fuse problem February 11, 2015 05:04PM |
Registered: 11 years ago Posts: 15 |
Quote
Cefiar
Polyfuses are designed only to work with a voltage that doesn't vary by too much, and the ones on RAMPS are only designed to work with DC.
Quote
Cefiar
If the voltage fluctuates a lot (eg: your supply produces a varying voltage due to being right at the current limit), the PTC fuses will heat up more than normal, and will trip earlier.
Re: RAMPS 1.4 heatbed and fuse problem February 11, 2015 08:12PM |
Registered: 10 years ago Posts: 14,672 |
Quote
~phoeny~
The Polyfuse doesnt gives a damn about Voltage as long its below the rated Voltage ... any Voltage above the rated one will cause the Polyfuse to Spark through the insulation to the other components.