Control device for machine tool

The invention provides a control device for a machine tool, which can automatically retreat a tool without breakage when a machining abnormality occurs, thereby suppressing deterioration of productivity. A control device (10) for a machine tool (1) in which a tool (7) is attached to a spindle (6) capable of moving relative to a workpiece (W) and the workpiece (W) is machined using the tool (7), the control device (10) being provided with: a parameter preparation means (13) in which control-related parameters are stored in advance; a retracting unit (14) that causes the tool (7) to perform a retracting operation for retracting from the workpiece (W); and a retreat diagnosis means (15) that diagnoses whether or not the retreat operation is normal, and stops the retreat operation when the retreat diagnosis means (15) diagnoses that the retreat operation is abnormal. 本发明提供一种机床的控制装置，在产生加工异常等时能够使刀具在无折损的情况下自动地进行退避，抑制生产率的恶化。机床(1)在能够相对于工件(W)进行相对移动的主轴(6)上安装刀具(7)，使用刀具(7)对工件(W)进行加工，机床(1)的控制装置(10)具备：参数准备单元(13)，其预先存储与控制有关的