Hi,
I posted about this in the General Electronics, but didn’t get much attention, so I’ll repost here:
I just modified an HS-422 servo for continuous rotation by following the instructions.
But then I tried to adjust the default position by sending 1.5ms pulses (BS2 program with a PULSOUT 14, 750 loop), and when I adjust the potentiometer, it only starts moving in one direction, and doesn’t change it even when I move the pot the other side around…
So then I tried to stick the pot at a position where the servo stops moving, and then I sent 1.3ms pulses, in which case it goes fast in the usual direction, and 1.7ms, where it stands still, without moving.
Any ideas of what’s happening? Did I do something wrong during modification?
Once post have been either read or followed up to, they may be locked. Anyhow, your servo issue sounds like the servo is not getting a proper control signal. My experience has been that servos will tend to run to an extreme position when bad control signals are sent to the servo. You might check for bad connections or a broken/damaged control wire. I damaged the pot making a mod on another type of servo and had erattic behavior until I figured out the problem.
got it to work
it was indeed the connections… but it was a pain to close the servo while keeping the connection right… it was disconnecting continuously… hope it will stay connected now
