Tips and Tricks: Remove Acad.vlx Virus from AutoCAD Products.

Most AutoCAD based products have reported malicious attack causing your drawing files to corrupt and render unuseful. This is not an actual AutoCAD file provided by Autodesk. 

When the malicious file Acad.vlx is loaded in AutoCAD it creates a copy of itself in the Help folder under C:\Program Files\AutoCAD 20xx\Help\logo.gif. It also modifies other files. It changes the system variable ACADLSPASDOC from default value 0 to 1, allowing Acad.vlx to be loaded in other drawings, thereby corrupting them.

Understanding External References: PART -1

External References also called as xrefs in AutoCAD, allow you to view any drawing as a reference in your current drawing. The Referenced drawing will be treated as an external drawing and will not be the part of your current drawing. External References gives you the flexibility of laying one drawing on top of another in any location, scale and rotate and being able to see both at the same time.

When you attach a drawing as an xref, you link that referenced drawing to the current drawing; any changes to the referenced drawing are displayed in the current drawing when it is opened or reloaded.

Tips and Tricks: Mirror Objects without Mirroring Text.

When Mirroring Object by default text, attributes and attributes definition will get flipped or turned upside down in the mirror image. The text will have different alignment and justifications after the objects are mirrored. If you don’t want the text to be reversed, set the MIRRTEXT system variable to ‘0’. 

Tips and Tricks: Improving Display Performance of AutoCAD Drawings.

To improve the Display performance of your drawing you can simplify the display of certain kinds of objects and speed up the performance. 

1. Turning off Solid Fill.

Turning off Solid fill Mode, certain object properties like wide Polylines, Solid-filled Polygons, Gradient Fill and Hatches are displayed in outline form as shown in the below figures. 

Learning AutoCAD: Standard Sizes of Drawing Sheets

Any newcomer to AutoCAD before beginning the drawing in AutoCAD has to know the standard sizes of drawing sheets. As per the International Standards the standard sizes of the drawing sheets recommended are designated as A0, A1, A2, A3 and A4 as shown in the table.

HOW TO USE UNITS AND SCALES IN AUTOCAD?

This is one of the basic and fundamental concepts a newcomer to Autocad should learn. One cannot start creating a sensible drawing until they are familiar with units, scale and the commands to control them. In this tutorial we’ll discuss the concepts of Units and Scales.

Before we get into commands there are two Frequently Asked Questions (FAQ’s) on Units and Scales. Lets us first try to answer them.