OSNAP Filters in AutoCAD

This post is an addition to the previous post I made about OSNAP. If you haven’t read it yet, you can check it out here >>AutoCAD OSNAP Command.  As I have discussed before, OSNAP is useful if you wanted to move an object accurately. By moving an object or a line for example to the endpoint of another line. Or if you want to move a circle and placing the center of the circle to the endpoint of an arc accurately, you need to use OSNAP. But what about placing the circle’s center only on the “Y” axis or vertical axis only ? What I mean to say is placing the center of the circle parallel to the end point of the arc (See Fig. 1).

    autocad polyline icon

Fig. 1 – Moving a Circle Using OSNAP Filter

To do it, create a circle and an arc as I’ve mentioned before. The position as in Fig. 1.  Type move or “M” on the keyboard and when AutoCAD prompts “Select objects:” select the circle and right click your mouse. Then you will see a prompt: Specify base point of displacement: then right click your mouse again while holding the “Shift key” then select “center” from the pop up menu. You can eliminate that step if you already set the OSNAP setting by activating the Object Snap (F3) and selecting all the Object Snap modes. If you set it that way, you only need to point your cursor near the center, quadrant, endpoint or midpoint of an object and a highlighted selection box will appear.

After selecting the center, another prompt will appear that says: Specify second point of displacement or <use first point as displacement>: Which means you have to select a point where you want to move the circle. Since you only want to move the center of the circle on the same distance of the arc endpoint, right click your mouse again while holding the “shift key”. When the pop up menu appears, select the Point Filters>.Y then click the enpoint of the arc beside the circle (See Fig. 2). After selecting the endpoint you will see a prompt again: Specify second point of displacement or <use first point as displacement>: .Y of (need XZ): AutoCAD is asking again where on the horizontal axis you want to put you circle.

    autocad polyline icon

Fig. 2 – Selecting Endpoint Using OSNAP Filters

Make sure “ORTHO” is on by togging F8 so the movement of the circle are on the X or Y axis only. The drag you cursor just above the circle you draw and click.  The circle now was moved the same distance of the arc endpoint.

1 comment so far ↓

#1 boncuman on 11.06.08 at 4:47 am

thanks…..

Leave a Comment