As I recall, there is a section in the Rostock MAX build manual that states in large bold letters a similar issue:MSURunner wrote:No, it doesn't reset it's height after receiving a G28 when in code. It resets itself if it's given JUST a G28, but if there's more than just the G28, it bores to China. Check out that first video...
[img]http://i.imgur.com/tMvjqHq.png[/img]
If using the Home X or Y buttons actually issue's a G28 with X or Y parameters filled in, then this would be the same reason why yours is doing that too..