I had this problem with Haimer and the TTS holder for it. The concentricity of the tip always go off by +/-0.01mm after a while, but not immediate like yours did.

Unfortunately I don't have good news for you as I have pretty much given up on my Haimer. I use the Hallmark ITTP now and that has been a great piece of equipment.

I hope you will find a solution for your Haimer soon.