HPGL

For a set of gravure lines with a free contour please first select Insert > HPGL engraving and place the object. In the subsequent dialog box "HPGL engraving properties", you can then determine your desired properties.

A HPGL engraving is based on a two-dimensional vector graphic, which consists of free contour lines and is described in HPGL format. This vector graphic is engraved into the surface of the main plate

The lines should be arranged so that their corresponding gravure lines create a certain number of separate "planed" areas. The spacing of lines, which together will produce a particular "cavity" must always be designed with regard to the geometry of the cutting edge of the assigned tool.

Because of the diverse ways of designing separate "planed" areas by the arrangement of lines or gravure lines, no import filter is capable of sorting useful from less useful solutions, meaning that, in principle, loaded HPGL files will also be imported.

The most important field of application for HPGL engravings are logos, which consist of lettering and surfaces with defined shapes.

The user can also generate the reference point for his HPGL engraving as the junction of two additionally added short, mutually perpendicular line segments (of, for example, 5 mm in length).

The presence of such a feature is checked while importing and, where appropriate, this is interpreted as a possible reference point for the main plate. For further options, see the entry "Reference point" under the following heading "HPGL engraving properties".

After placing the object you can set the following variables for the required HPGL engraving in the properties dialog box:

Variable	Description
HPGL file	Select the desired HPGL file from the suggestion list or import it from its location with the button "Import...". The original size of the object to be placed is displayed at the lower edge of the preview. Using "Scale" you can customize the displayed size without editing the HPGL file.
Pen assignment	When creating an HPGL file, each line must be assigned a "pen". In this dialog box you can now assign each of the pens both an in-fill color as well as a tool from the associated list boxes. In this case the List of object properties provides a good overview.
Reference point	You can optionally select as a point of reference either a) between 5 points of the rectangular outline of the object, b) the origin of the HPGL file, or c) the optional user-generated reference point created as a cross (see "Freely definable reference point" under the milling object Free contour). In case c) is chosen, a maximum of one pen per cross may be chosen, which is detected by the program in the lines assigned to it at the highest point.
Angle of rotation	Rotation angle of the HPGL engraving around its reference point.
Scale	Adaptation of the original absolute values given in the HPGL file for the dimensions. Note: A reasonable scale is only possible to a limited extent because of the highly critical relationship between line spacing and tool geometry.
Mirror	Option of mirroring the HPGL contour on its vertical axis through the reference point.

All of the imported HPGL files can be selected from the list box for the duration of the session. Use the multiselection option in the import dialog box (hold downCtrl key and click the desired HPGL files one after another) to open multiple files.

When you close the front panel file however, only the HPGL files of the objects actually placed are stored, which will be displayed from the start when you next edit the front panel.

Please consult our small manual with Tips for creating engravable HPGL files, which you can view or download on the Internet.

Based on years of experience with the implementation of pixel graphics in HPGL files, we can offer you an effective and fast conversion service. Please contact us for an offer, which in the vast majority of cases amounts to our competitive base flat rate. Of course, you can continue to use the HPGL file created in the future without further charge.