Hi ive only posted once before and it was great help, all fixed that time, we now have another problem with our cnc router, make and model is the jinan itech 1224, the problem this time is the gantry seems to be out of square, home position front left. we cut round the bed of the machine with a mdf sheet on top, a simple square, the front right lines are square, however when it comes to the front left, along the y axis it eventually slopes off between 1-3mm. how can this be solved?

Many Thank for any help and replies, Anymore information just ask