ATC Novamill Main Fuse blow out

Bara68 · Post by **Bara68** » Sun 14 Sep , 2025 8:58 am

Hello and good morning everyone,

I have been the proud owner of a Novamill with tool changer for a few days now. I came across this forum while searching for some information about this machine.
I am having a few problems with the machine and the control system. The main fuse blows after a few minutes, regardless of whether I connect the ATC to the Novamill or not. The situation is always the same: the fuse blows after a short time.
Does anyone have any idea what the problem could be? I'm not really an electrician myself and need some help.

Thanks in advance for your support.

Best regards, Christoph

Martin · Post by **Martin** » Mon 15 Sep , 2025 8:01 am

What fuse is blowing?

Bara68 · Post by **Bara68** » Mon 15 Sep , 2025 10:46 am

Hello, sorry, I think I expressed myself incorrectly. I mean the FI switch.

I suspect the RFI filter. When I measure the resistance, I get a resistance of L1 or N1 to ground, which cannot be correct.

Sorry, I'm not the best at electronics.

Martin · Post by **Martin** » Mon 15 Sep , 2025 13:39 pm

The filter can fail especially if a PAT test has been performed.

Bara68 · Post by **Bara68** » Tue 16 Sep , 2025 10:56 am

Hello and good morning,

Let's assume that the RFI is defective and needs to be replaced. I have been searching online for this filter for a while now, unfortunately with little to no success.

Do you have any ideas or recommendations for an alternative to the Rasmi RFI? It appears that Rasmi no longer manufactures this RFI.

Thank you in advance for your assistance.
Best regards, Christoph

Martin · Post by **Martin** » Tue 16 Sep , 2025 12:02 pm

https://uk.rs-online.com/web/p/power-li ... 513b7e64c9

Bara68 · Post by **Bara68** » Tue 23 Sep , 2025 7:29 am

Problem solved, the RFI filter was defective, I installed a new one and now everything is working as usual again.

Thanks for your help.

Christoph

Information