My Three Roll Mill Fuse Is Blown ...
What Do I Do?

"I just dropped a spatula into the feeding area and rollers stopped!"

"A piece of paper got stuck in between the rollers and the machine stopped working!"

"Three roll mill is down! The rollers wont turn as we increase the % on the control."

Sometimes we receive frantic calls or emails from customers who found out in dismay that the three roll mill stopped working, sometimes the cause being obvious, sometimes the problem seemingly coming from nowhere.

99 cases out of a 100, the fuse was blown.

A fuse is a type of low resistance resistor that acts as a sacrificial device to provide overcurrent protection, of either the load or source circuit. Its essential component is a metal wire or strip that melts when too much current flows through it, interrupting the circuit that it connects. Short circuits, overloading, mismatched loads, or device failure are the prime reasons for excessive current. Fuses are an alternative to circuit breakers. A fuse effectively interrupts excessive current so that further damage by overheating or fire can be prevented.

Replacing the blown fuse turns the machine back on, which means customer can resume production immediately. It only takes 2 minutes to finish the replacement process, thanks to the smart design that comes with each Torrey Hills machine. 2 fuses, one in use and one as a spare, are located right below power supply socket. You just need to pry open the plastic cover with a screwdriver, take out the blown one, and replace it with the brand new spare. The pictures below show the spare fuse in green circle, and the one in use in red circle.

three roll mill over current protection fuse

Last but not least, customers still need to reflect on why the fuse was blown in the first place. If the cause was obvious, such as foreign objects dropping into the feeding area, customers need to pay more attention during operation to avoid future incidents. If there was no direct event leading to the problem, customers are recommended to inspect whether the rollers are touching each other or whether the material has been too thick for the current gap setting.

When in doubt, call our service team! Our dedicated engineers are here 24/7 to answer your questions and solve your problems.