Parent page: PCB Design Objects
The accordion object is a system-created group object. The accordion object is created by the software during interactive length tuning to increase the overall length of a route. The software builds the accordion-shaped section of routing from tracks and/or arcs in accordance with the properties defined in the Accordion mode of the Properties panel. Because the accordion object is a group object, a placed accordion can be interactively reshaped if required.
The accordion object is placed automatically in the PCB editor when the Interactive Length Tuning command is being used and the route length is shorter than the length specified for that net.
The route length requirement is specified by:
After launching the PCB editor's Route » Interactive Length Tuning command, the cursor will change to a cross-hair and you will enter length tuning (Accordion placement) mode. Placement is made by performing the following sequence of actions:
Additional actions that can be performed during placement include:
The shortcuts available during length tuning include:
|Spacebar||Cycle through the three Styles of tuning pattern|
|, (comma)||Decrease amplitude by the amount specified for the Amplitude Increment|
|. (full stop)||Increase amplitude by the amount specified for the Amplitude Increment|
|3||Decrease space by the amount specified for the Gap Increment|
|4||Increase space by the amount specified for the Gap Increment|
|1||Decrease corner miter by the % specified for the Miter Increment|
|2||Increase corner miter by the % specified for the Miter Increment|
|Tab||Open the Properties panel in Accordion mode|
|Shift+G||Toggle Length Tuning Gauge on/off|
This method of editing allows you to select a placed Accordion object directly in the design space and graphically change its size and shape.
When an Accordion object is selected, its polygonal outline is displayed as shown in the animation below. The outer shape of the polygonal outline is defined by a series of edges: where each edge is represented by an end vertex at each end, shown as a solid white square (A in the image below); and a center vertex in the middle, shown as a hollow white square (B in the image below). Each end vertex represents the location where two edges meet.
Standard polygonal shape editing techniques are available for editing the shape.
When editing a polygonal object, there are three editing modes available, Slide/Miter, Incurvate (arc) and Move. The current mode can be changed while dragging a vertex or an edge by pressing Shift+Spacebar to cycle through the three modes.
The following methods of non-graphical editing are available.
Properties page: Accordion Properties
This method of editing uses the associated Accordion dialog and Properties panel mode to modify the properties of an Accordion object.
During interactive length tuning, the Properties panel can be accessed by pressing the Tab key.
After placement, the Accordion dialog can be accessed by:
After placement, the Accordion mode of the Properties panel can be accessed in one of the following ways:
The properties displayed in the panel and dialog reflect the settings that were used to create the selected accordion.
The Properties panel supports editing multiple objects, where the property settings that are identical in all currently selected objects may be modified. When multiples of the same object type are selected manually, via the Find Similar Objects dialog or through a Filter or List panel, a Properties panel field entry can be edited for all selected objects. If values of a property are different for objects in the selection, the appropriate field will be shown as an asterisk (
*) – a new property value will be applied to all selected objects.
A List panel allows you to display design objects from one or more documents in tabular format, enabling quick inspection and modification of object attributes. Used in conjunction with appropriate filtering – by using the applicable Filter panel, or the Find Similar Objects dialog – it enables the display of just those objects falling under the scope of the active filter – allowing you to target and edit multiple design objects with greater accuracy and efficiency.