Tq for all your response.. Currently, as gunh mentioned, my gate stops like that.. But I don't like this way because once once it hits the obstacle/stopper, the current will increase. The controller detects the current increase for a few seconds before it stops the gate. This will
increase the current consumption / TNB bill.  I want the gate to stop by itself at certain angle, just before it hits the rubber stopper, so that I can save the electricity.  I wonder how to do that... Hmm..