Flanged Plate Cannot Extrude Hole

Thanks Maxim.

I am doing that exactly as you say. Don't forget I already created the holes in the base plate. Mmmmm....

When you say it (the 3rd flange) is too small in compare [sic] to others, I don't understand this. The 3rd flange is of a dimension that is the same as the those already on the base plate albeit a half-s-curve.

Have a look at this problem I am having creating the 4th flange. Here the creation of the arced end is presenting with a un-joinable polyline.

AerospaceDesk said:

I set my Unit precision to a higher level and successfully joined the polylines and then was able to extrude the 4th flange.

I'd suggest you to use ESnap (object snap) feature to draw with precision:

Use EntitySnaps (ESnaps) to detect and snap to points on drawing entities, for example, end points, intersections, and center points. Snapping to a point provides an exact position for drawing and editing commands.

You specify ESnap modes to set snap options. For example, you might want to snap to intersections between entities. You can apply ESnap modes permanently or for a single operation.

ESnap modes are not universally applicable. For instance, you cannot define the end point of a Circle. Similarly, a line segment has no central point. However, a drawing entity might contain several points that match the ESnap mode criteria. A Line entity or an Arc, for instance, always has two end points. In those cases, the ESnap function identifies the nearest possible points. Always place the pointer as near as possible to the desired point.

The pointer snaps to a point depending on the:

• Type of drawing entity
• Selected EntitySnap mode
• Specific point on the selected entity

BTW, your plate is still "destroyed", if you look at it from the different point of view, you will get this: