Circular Pattern.pdf

Circular PatternThis task will show you how to duplicate geometry of one or more features right away at thelocation of your choice using a circular pattern.Make sure the item you wish to duplicate is correctly located in relation to the circularrotation axis.Open the CircularPattern1_R04.CATPart document.1.1.Select the pad which geometryyou wish to copy.2.2.Click the Circular PatternCircular Pattern icon.The Circular Pattern Definitiondialog box is displayed and thefeatures name appears in theObject field.If you change your mind and decide to pattern the current solid,click the object fieldand use the Get current solidGet current solid contextual menu item.For more information,refer toPatterningCurrent Solids.Keeping SpecificationsChecking the Keep specifications Keep specifications option creates instances with the limitUp to NextUp to Next(Up to LastUp to Last,Up to PlaneUp to Plane or Up to SurfaceUp to Surface)defined for the original feature.Theexample below shows you that the limit defined for the pad,that is theUp to surfaceUp to surfacelimit,applies to all instances.As the limiting surface is not planar,the instances havedifferent lengths.3.3.4.4.5.5.6.6.But for the purposes of our scenario,as the pad is going to be repeated on a planarsurface,activating the Keep specificationsKeep specifications option is meaningless.The ParametersParameters field lets you choose the type of parameters you wish to specify sothat the application will be able to compute the location of the items copied.These parameters are:Instances&total angleInstances&total angleInstances&angular spacingInstances&angular spacingAngular spacing&total angleAngular spacing&total angleComplete crownComplete crownIf you set Instances&total angleInstances&total angle or Angular spacing&total angleAngular spacing&total angle parameters,note that you cannot define the total angle when using formulas.Set the Instances&Angular spacingInstances&Angular spacing options to define the parameters you wish tospecify.Choosing Instances&Angular spacingInstances&Angular spacing dims the Total angleTotal angle fieldbecause theapplication no longer needs this specification to space the instances.Enter 7 as the number of pads you wish to obtain.Enter 50 degrees as the angular spacing.Reference DirectionClick the Reference elementReference element field and select the upper faceto determine therotation axis.This axis will be normal to the face.To define a direction,you can select an edge,a line,a planar face or a plane.Afterselecting an edge,a line or a planar face,if necessary,you can also select a point todefine the rotation center.If you select a plane,selecting a point is mandatory.Clicking the ReverseReverse button reverses the direction.8.8.Two arrows are then displayed onthe pad.Contextual commands creating the reference elements you need are nowavailable from the Reference elementReference element field:Create LineCreate Line:For more information,see Creating Lines.X Axis:X Axis:the X axis of the current coordinate system origin(0,0,0)becomes the direction.Y Axis:Y Axis:the Y axis of the current coordinate system origin(0,0,0)becomes the direction.Z Axis:Z Axis:the Z axis of the current coordinate system origin(0,0,0)becomes the direction.Create PlaneCreate Plane:see Creating Planes.If you create any of these elements,the application then displays the correspondingicon in front of theReference elementReference element field.Clicking this icon enables you to editthe element.If you modify the angular spacing,the application previews the result:arrows 1 and 2are moved accordingly.click PreviewPreview:the pad will be repeated seven times.The instances are green,just likethe original feature.9.9.Now,you are going to add a crown to your part.To do so,click the Crown DefinitionCrown Definitiontab.10.10.Set the Circle&Circle spacingCircle&Circle spacing options to define the parameters you wish to specify.11.11.Enter 2 in the Circle(s)Circle(s)field.12.12.Enter-18 mm in the Circle spacingCircle spacing field.This figure may help you to define your parameters:13.13.Click OKOK.These are your new instances:14.14.Now,you are going to modify the position of the initial pad.Such a modification willaffect all instances too.To do so,click the MoreMore button to display the whole dialog box.15.15.Enter 20 in the Rotation angle field.The application previews the rotation.Applying the DeleteDelete command on one instance deletes the whole pattern.However,deleting the instances of your choice is possible when creating or editing the pattern.To do so,just select the points materializing instances in the pattern preview.Selectingthese points again will enable the application maintain the corresponding instances.The Simplified representationSimplified representation option lets you lighten the pattern geometry.Whatyou need to do is just check the option and double-click the instances you do not wantto see.The instances are then represented in dashed lines during the pa。