Rambo 15A fuse limits heated bed power July 28, 2015 06:51AM |
Registered: 8 years ago Posts: 1 |
Re: Rambo 15A fuse limits heated bed power July 28, 2015 06:56AM |
Admin Registered: 16 years ago Posts: 13,902 |
Re: Rambo 15A fuse limits heated bed power July 28, 2015 07:25AM |
Registered: 10 years ago Posts: 14,672 |
Quote
stefanharjes
Hi RepRap,
I am wondering what determines the F4 fuse of the rambo board to be 15A. When I look at the board schematics, the power MOSFET driving the heated bed output is a PSMN7R0-60YS which Digikey lists with 89A max current. It has 6.4 mOhm Ron. I plan to run the heated bed with 24V @ 25A thus the MOSFET would generate about 5Watts of heat. Thus, my question is, can I simply replace F4 with a 30A fuse or is there some other limiting factor?
Thanks for your help.