@Syd_Khaos - thanks for the info about the glass. It makes perfect sense.
Mine shakes pretty violently during infill too, especially if the model is smaller and it has to go back and forth very fast.
Does anyone know why the machine seems to play computerized musical tones during printing? I am no talking about the finish tone but like while printing it makes some high pitched sounds that sound computerized and not just normal printing sounds. Am I imagining things?