As one of the people who helped bobc design RAMPS-FD, there are issues with V1 of the RAMPS-FD board. Even the boards with fuses are usually V1 boards, which was what they were supposed to be, but Geeetech decided that PTC's would be "good enough" even though we explicitly moved away from using PTC's due to issues with them.
That is, as mentioned, if it locks up, your hot-end gets stuck on. We asked Geeetech to pull it from sale due to this issue but they didn't listen. We wanted to sell something robust, designed to protect the electronics as well as have a bunch of safety features (like a hardware E-Stop). It wasn't tested yet Geeetech simply pushed ahead. They only wanted to sell their stock and basically they don't care about hot ends catching fire if the software locks up.
I personally won't recommend RAMP-FD to anyone, unless they're only using it to learn how to make something better.
That is, as mentioned, if it locks up, your hot-end gets stuck on. We asked Geeetech to pull it from sale due to this issue but they didn't listen. We wanted to sell something robust, designed to protect the electronics as well as have a bunch of safety features (like a hardware E-Stop). It wasn't tested yet Geeetech simply pushed ahead. They only wanted to sell their stock and basically they don't care about hot ends catching fire if the software locks up.
I personally won't recommend RAMP-FD to anyone, unless they're only using it to learn how to make something better.