Adjust the duster switches only when the machine is standing up in the transport position.

Unwind some cloth so there is free movement of the cushion roller.

Check the wind-up switches first by lifting the cushion roller up and holding it against the stop bolts.  The switches on both sides should clearly actuate before the cushion lever screws hit the stops. With the switch activated, there should be a little play in the arm of the duster switch while activated.

Be certain that the switches on both sides are adjusted with the same amount of over-travel.  If there is no over-travel, loosen the adjusting screw with an 11/32" wrench and back the screw out until there is some over-travel of the switch lever.  Tighten the nut(s) and make sure the cushion roller moves up and down freely.