Why does laser only proceed seconds then stop?

why does the laser only proceed seconds then stop?
sometimes after you work Morntech laser engraver or laser cutter, you may nicely cope with troubles as below:

Yesterday it worked perfectly, but today, laser unit only moves numerous steps, then it stops. Why?

If you confirm very carefully from the machine, following in the direction of control panel, there is recognized getting a E-STOP—its emergency stop. Means, after you cope with problem, press this button, the unit will end quickly to retain operator safe.

But quickly after push this button, for individuals that do not pull it out, laser engraver or laser cutter will retain below this condition. Then after you restart the machine, it will only proceed amount of actions then stops.

So, dont worry, pull the key out.