[Tex/LaTex] TikZ tree sibling distance

tikz-pgftikz-trees

I have been struggling a bit with TikZ and how to build trees. What I need now is some advice on how to improve the node placement. Right now I have these 2 trees:

\documentclass[a4paper,10pt]{article}
\usepackage{tikz}
\usetikzlibrary{positioning,shadows,arrows,trees,shapes,fit}
\begin{document}
\begin{tikzpicture}
[font=\small, edge from parent fork down, 
every node/.style={top color=white, bottom color=blue!25, 
rectangle,rounded corners, minimum size=6mm, draw=blue!75,
very thick, drop shadow, align=center},
edge from parent/.style={draw=blue!50,thick},
level 1/.style={sibling distance=6cm},
level 2/.style={sibling distance=2.5cm}, 
level 3/.style={sibling distance=2.5cm}, 
level distance=2cm,
]

\node {Paletizar} % root
    child { node {Iniciar} 
        child { node {Detectar Pacote}}
        child { node {Movimentar}}
        }
    child { node {Empacotar}
        child { [sibling distance=15mm] node {Posicionar}
            child { node {Pegar/Largar}}
            child { node {Organizar}}
            child { node {Movimentar}}
            }
        child { node {Agrupar}}
        child { node {Padronizar}}
        }
    child { node {Finalizar} 
        child { node {Detectar estado\\da palete}}
        child { node {Transmitir}}
};
\end{tikzpicture}


\vspace{2cm}

\begin{tikzpicture}
[font=\small, edge from parent fork down, 
    every node/.style={top color=white, bottom color=blue!25, 
    rectangle,rounded corners, minimum size=6mm, draw=blue!75,
    very thick, drop shadow, align=center},
    edge from parent/.style={draw=blue!50,thick},
    level 1/.style={sibling distance=6cm},
    level 2/.style={sibling distance=3cm}, 
    level 3/.style={sibling distance=2cm}, 
    level distance=2cm,
    ]

    \node {Paletizador} % root
        child { node {Inicialização\\de sistema} 
            child { node {Sensor X}}
            child { node {Acção Y}}
            }
        child { node {Sacos}
            child { node {Linha/Coluna}
                child { node {Garra}}
            child { node {Rodar Garra}}
            child { node {Acção Y2}}
            }
        child { node {Euro Pallet}}
        child { node {Disposição $xyz$}
            child { node {$x=?$}}
            child { node {$y=?$}}
            child { node {$z=?$}}
            }
        }
    child { node {Sistema de despacho} 
        child { node {Sensor de peso\\/contador}}
        child { node {Tapete rolante\\de saída}}
};
\end{tikzpicture}

\end{document}

So basically what I want is a way to edit the code I have so that everything is perceptible which basically means that I need specific sibling distances to each child. I have tried to add a sibling distance in the child nodes but maybe it was in the wrong place or something else because it didn't change anything. I also tried to use below and all its derivations but the results were even worse because of the size of the boxes.

Best Answer

Using tikz-qtree helps a bit with automatic spacing of siblings. It also provides a simpler input method. Here's your second tree done in that way:

\documentclass[landscape]{article}
\usepackage[utf8]{inputenc}
\usepackage[T1]{fontenc}

\usepackage[margin=1in]{geometry}
\usepackage{tikz-qtree}
\usetikzlibrary{shadows,trees}
\begin{document}
\tikzset{font=\small,
edge from parent fork down,
level distance=1.75cm,
every node/.style=
    {top color=white,
    bottom color=blue!25,
    rectangle,rounded corners,
    minimum height=8mm,
    draw=blue!75,
    very thick,
    drop shadow,
    align=center,
    text depth = 0pt
    },
edge from parent/.style=
    {draw=blue!50,
    thick
    }}

\centering
\begin{tikzpicture}
\Tree [.Paletizador
        [.{Inicialização\\de sistema}
            [.{Sensor X} ]
            [.{Acção Y} ] ] 
        [.Sacos
            [.{Linha/Coluna} 
                [.{Garra} ]
                [.{Rodar Garra} ]
                [.{Acção Y2} ] ]
            [.{Euro Pallet} ]
            [.{Disposição $xyz$}
                [.{$x=?$} ]
                [.{$y=?$} ]
                [.{$z=?$} ] ] ] 
        [.{Sistema de despacho}
            [.{Sensor de peso\\/contador} ]
            [.{Tapete rolante\\de saída} ] ]
]
\end{tikzpicture}
\end{document}

output of code

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