basic servo control question

ziggyrama

Hi, I am sure this has been addressed before, but I haven’t had any luck finding an answer. I am trying to control a single servo and move it slowly from a stationary center position to a 90 degree position and hold it using a BS2 and an unmodified servo. I am using a standard FOR NEXT LOOP to move it, but cannot figure out how to leave the loop and keep the servo at 1250 once it reaches the final point. The servo simply pans back and forth between the two positions. I've tried using an IF statement to leave the loop, but it doesn't seem to work. Any help would be appreciated.

Thanks

for x = 750 to 1250 STEP 25
PULSEOUT 1,x
PAUSE 20
NEXT

allanlane5

ServoPos VAR WORD
X VAR WORD

FOR x = 750 to 1250 step 25
ServoPos = x
GOSUB RefreshServo
NEXT

RefreshForever: ' Infinite loop, holding servo position...
GOSUB RefreshServo
GOTO RefreshForever

END

RefreshServo:
PULSOUT 1, ServoPos
Pause 20
RETURN

LilDi

With a BS2, each PULSOUT unit is 2 micro seconds. A servo pulse width is from 1.0 milliseconds to 2.0 milliseconds.
Doing the math, that means the code for moving the servo should be

FOR x=500 to 1000 step 25

Center position is PULSOUT 1,750