Hi Sergie I would set you're limits in the motor they are easy to do, an will let you know how. years ago had a customer with a DSR920 that took a lighting hit an his DSR receiver ran an Birdview dish to the far west an broke off the 3 mounting ears on the gear box that holds the motor to the steel plate, didn't relize it till hook up new motor an dish started running asap. the DSR was putting out voltage on the actuator wires when the receiver was power up.
Now to set the limits, 1st drive the dish to its west sat , then remove the motor, an the side cover, will notice a stop, 2 of them on each side of big roung gear (about 1/2" round bar welded to the back plate) then with a big scwer-driver turn the worm gear till almost to that bar (NOT on the bar just a little off it), an stop. now with a receiver or power supply run the motor west till it hits the west limit switch, (lower, grey ecentric an it is fixed can not move it is pressed on shaft). now reinstall the motor, west limit switch is set now.
now need to set east limit switch, the top grey ecentric is moveable, only has a small spring holding it down on teeth on the lower ecentric, if you take a small screw-diver an just lift it up will move an aline with the teeth on lower ecentric. now start moving the dish to the east till you start getting close to the east stop on the mount (agin round bar welded) then set the top limit to where it stops just before hitting the round bar stop, now you're east limit is set.
dive the dish back to the same position that you started from, hook up you're receiver an will be good to go to watch TV. Even on my motor drives that don't have limit switches on them I will try to mount a switch some how to get to trip just in case if any thing ever goes wrong, to keep from costing me time an money to fix them.