Hi 3D people .I have a problem . My printer starts to print , this object is 50mm high , but when it gets to 22mm it stops ! Then starts again and moves sometimes right ,and starts printing again , and stops at 22mm ! And then this time it stops moves forwards and starts all over again ! And youve guessed it stops at 22mm ! Any clues please to whats happening ? The printer has dad a few issues lately but this is new .