Accidentally blew a fuse of Arduino CNC controller by reverse polarity
Today I was messing around with my CNC shield (version 3.00) and GRBL. But somehow I managed to accidentally reverse the polarity of my power cables. Until today I had no problem keeping that in mind. The fuse was blown and like it’s not enough yet- drives also. DRV8825 drives have no reverse polarity protection- I toasted 3 of them in a blink. Capacitors seemed to be fine. I have read that if they get the wrong polarity for a moment it doesn’t ruin them instantly.
I “replaced” fuse by soldering random wire in place of the original. I hope it will act as a fuse as well someday? Everything seemed to work. It uses some kind of glass fuse with no markings on it. So I am not sure with what I should replace it with. Of course, had to replace drives. Arduino seems to be also undamaged by this mishap.
A newer version of these boards does not have this fuse.
Photo of the burned fuse
Here is the photo of the aftermath.
Arduino CNC controller shield with a blown fuse
What type of fuse do you use as replacement?
I did not actually use fuse for fixing it. I just bypassed with a random wire. So – I can’te tell what kind of fuse goes there.
I have been messing around for last few days trying to figure what I was doing wrong! I flash the board with so many different hex files always thinking the firmware was the problem, after all this head aches to only to find the fuse was blown, lucky I have a second board and everything works finally but if someone could tell me what fuse size it is so I can replace it.
I don’t know which kind of would be good replacement.
I have it changed by a 10K resistor and it works perfectly and fulfills its function as if it were a fuse.
Hi
I want to replacement fuse of my cnc shield
how many amp of fuse on cnc shield?
Not sure how much that fuse should take, but I think it must be enough to drive all motors. For example, if you have 3 motors running at 1.5 amperes – fuse should withstand at least 4.5A. I replaced it with wire so I am not sure how much is it.