Quote-DUS- Thanks! I applied the above modifications, and now the Z_raises work normally for G29. Howver, for G28 the issue remains. Is that described somewhere else in the code? I have changed the line in bold and red (line 1285) in marlin.main.cpp - 50 is the value for acceleration of z axis - for me solved the problem when doing the G28 the Z motor stall #if Z_HOME_DIR < 0by zrcz - General Mendel Topics