VFD (?) tripping RCD

[Jonathan]

Have you checked your water pump and pipes ?? on the router

I have checked the integrity of the pipes, but I've not tried running it without the pump as I do not want to risk the spindle.

would it help if I came with my VFD at the weekend to try ??

It would help, thank you very much for the offer. However I don't want to risk your VFD as clearly the VFD getting turned off by the breaker is bad for the IGBTs inside it and could well damage or ultimately break them. It's not worth it particularly as your machine is so close to being finished now. Would have finished the parts by now if it wasn't for this.