Why Your Spindle Keeps Spinning After M05

M05 spindle stop sounds simple — until the spindle keeps turning, drifts past your tool change, or runs away on a control fault. This video covers what M05 actually does inside the control, why M05 vs M00 vs M30 behave differently on spindle state, the dwell time you need before a tool change, and the failure modes that turn a 'stopped' spindle into a crash. Chapters: 0:00 The gap nobody mentions 0:35 What M05 actually commands 1:15 M05 vs M00 vs M30 — spindle behavior 2:00 Coast-down: the hidden dwell 2:50 Runaway: when M05 is ignored 3:40 The orientation trap before tool change 4:25 How to verify your spindle is actually stopped 5:10 The takeaway + subscribe If this was useful, the M03 vs M04 video covers why running the wrong spindle direction can quietly destroy a tap before you hear it. ShopFloorIQ — plain-English explainers for the trades.