The PIVOTZ Command [EP]

The PIVOTZ command is used to define the setting distances for wire EDM guide heights and to specify the sheet thickness for punch presses. This command is valid for punches and wire EDMs having 2 separately controllable wire guides. The syntax is as follows:

Punch Presses

\textbf{PIVOTZ /} value

The above command is used to specify the sheet thickness required (on some machines) for nibble patterns. In addition, GENER will check that the requested nibble increment is never less than value.

Wire EDM Machines

\textbf{PIVOTZ / } \big[\,\textbf{TABLE},\textbf{HIGH},\mathit{phyu}\,\big] \; \big[,\textbf{TABLE},\textbf{LOW},\mathit{phyl}\,\big] \; \ldots

\hspace{1cm} \ldots \; \begin{bmatrix} ,\textbf{ROTREF},\textbf{HIGH}, \begin{pmatrix}\begin{array}{l} \mathit{logu} \\ \textbf{AUTO} \end{array} \end{pmatrix}\end{bmatrix} \begin{bmatrix} ,\textbf{ROTREF},\textbf{LOW}, \begin{pmatrix}\begin{array}{l} \mathit{logl} \\ \textbf{AUTO} \end{array} \end{pmatrix}\end{bmatrix} \; \ldots

\hspace{1cm} \ldots \; \begin{bmatrix} ,\textbf{ADJUST}, \begin{pmatrix}\begin{array}{l} \mathit{zval} \\ \textbf{HIGH} \\ \textbf{LOW} \\ \textbf{SMALL} \\ \textbf{LARGE} \end{array}\end{pmatrix}\end{bmatrix}

\textbf{PIVOTZ / } \mathit{phyu,phyl,} \begin{pmatrix}\begin{array}{l} \mathit{logu} \\ \textbf{AUTO} \end{array}\end{pmatrix}, \begin{pmatrix}\begin{array}{l} \mathit{logl} \\ \textbf{AUTO} \end{array}\end{pmatrix}, \begin{pmatrix}\begin{array}{l} \mathit{zval} \\ \textbf{HIGH} \\ \textbf{LOW} \\ \textbf{LARGE} \\ \textbf{SMALL} \end{array}\end{pmatrix}

The two forms of the PIVOTZ command provide different methods of specifying the same information. Note that if the second method is used all 5 parameters must be specified in the order shown.

\big[\,\textbf{TABLE},\textbf{HIGH},\mathit{phyu}\,\big] \; \big[,\textbf{TABLE},\textbf{LOW},\mathit{phyl}\,\big]

These parameters define the physical wire guide positions. The values indicate the Z axis height of the upper and lower wire guides with respect to the machine origin. This information is used by GENER to perform travel limit checking, as travel limit checking is based on the physical movement of the guides.

\begin{bmatrix} ,\textbf{ROTREF},\textbf{HIGH}, \begin{pmatrix}\begin{array}{l} \mathit{logu} \\ \textbf{AUTO} \end{array} \end{pmatrix}\end{bmatrix} \begin{bmatrix} ,\textbf{ROTREF},\textbf{LOW}, \begin{pmatrix}\begin{array}{l} \mathit{logl} \\ \textbf{AUTO} \end{array} \end{pmatrix}\end{bmatrix}

These parameters define the logical wire guide positions. The values indicate the Z axis height of the upper and lower programmed positions with respect to the machine origin. The NC machine will assume that lower and upper wire guide information is relative to these guide positions. CL coordinates are projected to the logical guide height positions before being output in the NC control tape. To output the CL Z axis data as a machine W or Z axis value, specify AUTO instead of an upper or lower wire guide position.

\begin{bmatrix} ,\textbf{ADJUST}, \begin{pmatrix}\begin{array}{l} \mathit{zval} \\ \textbf{HIGH} \\ \textbf{LOW} \\ \textbf{SMALL} \\ \textbf{LARGE} \end{array}\end{pmatrix}\end{bmatrix}

This parameter defines the position along the wire where feed rate calculations occur. This information is used in GENER for total machining time calculations. The time can be computed using the upper wire guide movements or the lower guide movements by specifying HIGH or LOW respectively. In multi-axis moves the wire guides will move different distances and specifying SMALL or LARGE will select the smallest or largest guide movement distance respectively. A Z axis height “zval” can be entered to have time calculations based at the specified height relative to the machine origin.