After the machine is built you can lash it to a tree with rope and fill the the feeding tray with mostly salt and perhaps a little corn at first to help to lure the deer in. You can also lash it above the ground to keep the smaller animals out if you wish, but it will kill the ticks on them too if you leave it on the ground. Please note that certain tick killing products also kill cats so be sure to read the label on any product that you use.
The idea is to spray the carpet rubbing flap at least once a week. When the animal feeds it has to rub its head on the carpet flap. The tick spray residue will be applied and kill all the ticks on the deer.
We have to break the cycle of the deer tick. It is a very serious problem.