//determin direction
		if (current_station < tool_number) {
		//go forward
			fwd_hops = tool_number - current_station;
			rev_hops = stations - fwd_hops;
			//st_inc = command_inc * fwd_hops;
		} else {
		//go backwards
			rev_hops = current_station - tool_number;
			fwd_hops = stations - rev_hops;
			//st_inc = command_inc * rev_hops;
		}