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Projection of a Point — VektorCAD Tutorial

This exercise guides you through drawing the projections of a single point using VektorCAD. You will draw the XY reference line, place a point above HP and in front of VP, add the projector, and dimension the distances — all with Normal line thickness.

Problem Statement

Draw the projections of a point P located 25 mm above the Horizontal Plane (HP) and 35 mm in front of the Vertical Plane (VP).
Show the front view (P') (above XY) and the top view (P) (below XY). Dimension both distances from the XY line.

Given
- Distance above HP: 25 mm → Front view (P') is 25 mm above XY.
- Distance in front of VP: 35 mm → Top view (P) is 35 mm below XY.

Objective 

- Draw XY line, projector, p' and p using VektorCAD commands: xyline, ucs, point, line, dimlin.  
- Use Normal thickness for the XY line, projector, and dimensions.  
- Turn Entity Snap on for precise picks.

Step‑by‑Step

1) Prepare Drafting Settings

  1. Set Line Thickness

    1. From the thickness buttons (Thin / Normal / Thick), click Normal.
      Normal Thickness
    2. Use Normal thickness for the XY line, projection lines, and dimensions.

  2. Enable Snaps

    1. Turn Snap ON and Entity Snap ON from the status bar.
      Snap ON

2) Draw the XY Reference Line

  1. In the Line dropdown menu, click XY Line.
  2. Pick a start point on the sheet (roughly centered).
  3. Move the cursor horizontally and click to set a length (e.g., 160 mm).
  4. This is your XY reference line — all distances will be measured perpendicular to it.

XY Line

3) Move UCS to the Midpoint of XY

  1. On the toolbar, click UCS.
  2. Hover over the XY line until the Midpoint snap glyph appears, then click.
  3. The UCS origin (0,0) is now positioned at the midpoint of XY.
    1. The X-axis lies along XY.
    2. The Y-axis is perpendicular to XY.

UCS at Midpoint

4) Draw the Projector (Perpendicular to XY)

  1. On the toolbar, click Line.
  2. First point: snap to the UCS origin (midpoint of XY).
  3. Second point: draw a vertical line approximately 25 mm above XY.
  4. Repeat to draw a vertical line 35 mm below XY.
  5. These verticals are your projectors.

Projector Line

5) Mark the Front View (p′) and Top View (p)

We will place points along the projector, measured from XY.

  1. On the toolbar, click Point.

  2. p′ (Front View):

    1. With the UCS origin on XY, type 0,25 in the command prompt and press Enter (25 mm above XY).
    2. A point marker appears.
    3. From the Text menu, label this point as p′.

  3. p (Top View):

    1. Click Point again.
    2. Type 0,-35 and press Enter (35 mm below XY).
    3. A point marker appears.
    4. From the Text menu, label this point as p.

Note: Coordinates are with respect to the UCS origin on XY.
- Positive Y → above XY.
- Negative Y → below XY.

Front and Top Views

6) Dimension the Distances from XY

Use linear dimensions to annotate 25 mm (p′) and 35 mm (p) from XY.

  1. On the toolbar, click Dimension.

  2. Dimension p′ (25 mm):

    1. First extension point: snap to the UCS origin on XY.
    2. Second extension point: snap to p′.
    3. Place the dimension text neatly to the side.

  3. Dimension p (35 mm):

    1. Start dimlin again.
    2. First extension point: snap to the UCS origin on XY.
    3. Second extension point: snap to p.
    4. Place the dimension text below.

Dimensioned Points

✅ Tips:
- Turn Snap OFF before picking exact points to avoid mis-snapping.
- Keep line thickness at Normal for dimension lines.
- Dimension text and style will follow your active Dimension Style.

Result Checklist

  • XY line drawn with Normal thickness.
  • UCS origin at the midpoint of XY.
  • Projector line drawn perpendicular to XY through UCS origin (Normal thickness).
  • P' placed 25 mm above XY using point @0,25.
  • P placed 35 mm below XY using point @0,-35.
  • Two dimlin dimensions placed from XY to P' and to P (Normal thickness).

Variations (practice)

  • Change distances (e.g., 40 mm above HP and 20 mm in front of VP).
  • Place the UCS at a different XY location and repeat.
  • Try second/third/fourth quadrant cases and note where P and P' fall relative to XY.

Commands Recap

  • xyline — draw the XY reference line.
  • Thickness: Normal — use before XY, projector, and dimensions.
  • Entity Snap — enable, with Midpoint/Endpoint.
  • ucs — move the UCS origin to the midpoint of XY.
  • line — draw the projector perpendicular to XY.
  • point — mark (P') at @0,25 and (P) at @0,-35.
  • dimlin — place linear dimensions for 25 mm and 35 mm.

You’ve completed the projection of a point: a clear XY, projector, and correctly located front and top views with dimensions.