I have a Snapmaker A350 and have been using it for 3D printing for several months. I recently noticed that the cable that attaches to the heated bed was bending and twisting during the printing process in a way that was inducing wear and tear on the cable. A small lesion had developed already at the junction where the cable meets the heated bed. I wrapped the area with electrical tape to reduce the bending. A few weeks later, the printer stopped working and I noticed the cable had burned through the electrical tape! I am attaching four pictures to show people the problem. I will of course contact Snapmaker support for servicing, but I thought I should post the issue here given the potential for a fire hazard.
The first picture shows the damage as discovered. The second picture shows the damage after I removed the electrical tape. The third picture shows the area after I disassembled things and cut the cable; we see the side of the heated bed. The last picture shows the other side of the cut, where the damage originated: you can see that the red cable shorted/overheated as indicated by the melted red plastic; possibly a short between the red and white wires?
I suggest people put some sort of heat resistant support at the junction before a break appears so that bending and twisting is minimized. And if a breaks appears, stop using the heated bed immediately.
