unintentional Z Values
Have You Experienced Unintentional Z Values ?
AutoCAD has been 3 Dimensional for decades. Most AutoCAD Users use it for 2D Drafting (and Annotating). Yesterday I started my roadshow at our Design Sub-Contractors. I paid a visit to a Structural Engineering Design, and met the people working at our project. I introduced myself and told a few items of my Big-Picture Plan: among other things – a set of disciplinary tool palettes, a revised template and a new profile…
Right after, I was “attacked” with a series of questions and issues. Some of those were about the project and other, focused directly on AutoCAD knowledge in general (like merge a non-standard layer to a standard one, attaching the current file to a standard *.dws file, etc.) and Elevation or Unintentional Z Values in particular.
Avoiding the Unintentional Z Values
Actually this can be solved in 2 or 3 different ways:
Then, you can type at the Command Line OSNAPZ and Enter The Value of 1 instead of 0.
If you are using 2016/17/18 You Can Include the OSNAPZ (which is a System Variable) Using 1 as your preference and then You’ll get a Notification Balloon Telling that some SYSVARS have changed in your SysVarMonitor.
Repairing the problem of Unintentional Z Values
AutoCAD’s Express Tools have a FLATTEN command but I’d prefer to explain the Workaround of only using the Properties:
1st You are going to Select It All
Then, using the Properties Palette – In which you’ll see Multiple [Selection] at the Object Type – Open the Arrow to the right and filter your Selection by Object Type
For Instance, Circle (235) – the number between parentheses is the number of circles selected
to the Center Z Property and if it Varies, enter a 0′ at this field.
Here is a short list by object types:
LINE – Start Z & End Z
ARC &/or Circles – Center Z
POLYLINE – Elevation
TEXT – Z Position
You get the Idea, don’t You?
Unintentional Z Values – Conclusions:
- Always prefer Polylines over Lines & Arcs (Easier & Faster to Flatten).
- Maintain Your OSNAPZ Value as 1 (on) at all times & especially when using XREF Attachments for snapping to Points You don’t actually know…Try to look at your drawing using the Cube in a 3D View and try to draw an object Replacing the Z Value with Elevation (Which is Your Current UCS) See how it works, filtering the Z Values.
- Get familiar with the SysVarMonitor to correct System Variables such as OSNAPZ which might change for many reasons. SysVarMonitor is available since 2016.
- If You have an AutoCAD Profile of your own (or several)
- Every Now & Then, use the Cube and try to verify – visually – that Your 2D is flat.
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