find_edgex()
{
  gvarset(8631,100); //acceleration time 50ms = 0.05s
  gvarset(8634,(1<<24)|(speed*3)); //Jog speed for X
  gvarset(8635,1); //X+
  timer=0;
  do
   {
      sensor0=portget(INPUT_PROBE);
      if ((timer&0xff)==0)   {     gvarset(8635,1);    };
      timer++;
    }while(sensor0!=0);

  gvarset(8634,(1<<24)|(speed_probe*3)); //Jog speed for X
  gvarset(8635,1<<8); //X-
  timer=0;
  do
   {
      sensor0=portget(INPUT_PROBE);
      if ((timer&0xff)==0)   {     gvarset(8635,1<<8);    };
      timer++;
    }while(sensor0==0);

   gvarset(8635,0); //stop jog
   wait_move();

};