Is this what they call a left homing machine? All my zigzagger have the needle in center unless I move the needle left or right with a knob (..., lever or similar). Either way, the needle should not be prone to hit the throat plate or brake, something needs to be sorted out.
It can be a case of cleaning and oiling, making shure parts move freely. If there is a needle position option make sure all parts are oiled and move freely. Much the same for the zigzag swing arm. Take off all linds and covers, clean, detect all oil ponts, a drop or two of oil, run the machine and repeat. Move levers, knobs, settings to get every function back in action.
You have to give us a bit more info for detailed help, maybe a model number or a picture of the machine. If you are lucky someone here knows the model first hand.
Last edited by Mickey2; 11-08-2018 at 03:45 AM.