# z-axis not responding **URL:** \ **Category:** LulzBot Mini\ **Created:** [September 10, 2016, 10:30pm UTC](https://forum.lulzbot.com/t/z-axis-not-responding/3974 "2016-09-10T22:30:25Z")\ **Posts on this page:** 3\ **Page:** 1
**Author:** ![zentardi](https://avatars.discourse-cdn.com/v4/letter/z/e68b1a/32.png) [@zentardi](https://forum.lulzbot.com/u/zentardi)\ **Post date:** [September 10, 2016, 10:30pm UTC](https://forum.lulzbot.com/t/z-axis-not-responding/3974/1 "2016-09-10T22:30:25Z")
The z-axis motors on my Mini won’t move when I press the z-axis buttons on octoprint or cura control panel. The x and y axis move fine. On a side note, this morning as I was heating up abs filament to 230 degrees, and pressed print, I got an error message saying I reached dangerous temp levels. And then I smelled a funky burning smell from the printer (toolhead or circuit board)? I called tech support and we ran M119 and it read normal. We checked the circuit board and wiring, which seemed normal. My guess would be a fried circuit that drives the z motors, or maybe faulty wiring? I have no idea. Any suggestions? ---
**Author:** ![kmanley57](https://avatars.discourse-cdn.com/v4/letter/k/13edae/32.png) [@kmanley57](https://forum.lulzbot.com/u/kmanley57)\ **Post date:** [September 10, 2016, 10:48pm UTC](https://forum.lulzbot.com/t/z-axis-not-responding/3974/2 "2016-09-10T22:48:11Z")
While you had the CB cover off did they have you check to make sure the heat sink had not fell off and shorted something? ---
**Author:** ![zentardi](https://avatars.discourse-cdn.com/v4/letter/z/e68b1a/32.png) [@zentardi](https://forum.lulzbot.com/u/zentardi)\ **Post date:** [September 11, 2016, 12:54am UTC](https://forum.lulzbot.com/t/z-axis-not-responding/3974/3 "2016-09-11T00:54:47Z")
I noticed a heat sink was loose after pushed it back in place. Any idea as to why my z axis isn’t responding?