Hi, thx for the replies :) I have found out the reason , the base layer is sticking to the plate (with PritStick) The actual issue is the Z axis movement , it is not moving up in small movements , but will with large movements so the print head is crashing into the model. Ill look at the forum for Ideas as its the old alignment issue .... erghh

Hi Michael, thx for the info , got it working. no onto the next issue.