Hi!One year ago, we bought a huge DeltaWasp. The quality of printing is above expectations. Really good.But this is the only Delta 3D printer in the office so we are newbies in solving its problems.A few weeks ago, the Spitfire nozzle assembly just burned itself during an 100 hours print. The support had no answer for this awkward problem. They just said they can offer us another Spitfire at a reduced cost. We were very lucky as it didn't really spit fire, although I was honestly afraid after the incident. We put a camera on it for continuous surveillance.We replaced the unusable Spitfire with a new one. The new Spitfire printed OK a new object for about 48 hours until it did this:wasp.jpgWe found the nozzle stuck inside the assembly. We fixed the Spitfire and tried to print the same model but now the printer's arms, instead from moving from down to up, they do the opposite: the printer starts printing from 5 mm distance from the platform and goes down until it starts digging into the platform. Calibration is also a mess.We are now trying to solve this with the support. But is there anyone who had these problems before?Thanks!