endstop problem marlin

Hi,
I got a problem with the endstops using marlin+minitronics board;

everytime I home one of the axis it does react to the home switches but it travels some extra distance beyond the home postion resulting in the axis bumping onto the heated bed etc before it stops..I'm used to using sprinter with sanguinolulu without any problems...
Maybe someoneknows how to fix this..

Thank you!

Edited 1 time(s). Last edit at 07/30/2013 08:50AM by blue_electric_71.

Thats normally down to your motor missing steps (speed to high, under current, poor driver cooling) or a mehanical fault stopping your axis traveling properly in one direction.

It seems end stops are only good for setting your zero position and not as an emergency stop, as they get ignored whilst jogging axis and only work during homing.

So, if it happens whilst homing you probably have a wiring problem or failing switch, if it happens whilst manually jogging axis its under current or bad driver cooling, belt issues or too much speed..