To Work with Splines

To Work with Splines

A spline is a smooth curve that passes through or near a set of points that influence the shape of the curve. 

Draw a Spline

  1. Click Home tab > Draw panel > Spline. 
  2. (Optional) Enter m (Method). Then enter either f (Fit Points) or cv (Control Vertices). 
  3. Specify the first point of the spline. 
  4. Specify the next point of the spline. Continue specifying points as needed. 
  5. Press Enter to end, or enter c (Close) to close the spline. 

Draw a Spline Tangent to and Connecting Two Lines or Curves

  1. Click Modify tab > Blend Curves. 
  2. (Optional) Enter con (Continuity) and enter a tangency option. 
  3. Select a line or curve near an endpoint. 
  4. Select another line or curve near an endpoint. 

Convert a Spline-Fit Polyline to a Spline

  1. Click Home tab > Draw panel > Spline. 
  2. Enter o (Object). 
  3. Select a spline-fit polyline and press Enter. 
    4. The selected Object changes from a polyline to a spline. 
Powered by  AutoCAD ®

    • Related Articles

    • AutoCAD Keyboard Commands

      Learning how to use AutoCAD keyboard commands can help you work faster and improve your efficiency. This article lists the abbreviated commands that can be used in AutoCAD (Toolbox). Toggle General Features Ctrl+G Toggle Grid Ctrl+E Cycle isometric ...

    • How to Join Polylines, Splines, Lines, and Arcs Into a Single Polyline

      Click Home tab/Modify panel/Edit Polyline.   (Find) Select a polyline, spline, line, or arc to edit. If you selected a spline, line, or arc, press Enter to convert the selected object into a polyline. Enter "J" (Join). Select one or more polylines, ...

    • Drawing Polylines

      Draw polylines with straight or curved segments. Define the width for the polyline segments and taper the width across the segment. Draw polygons specifying the number of sides and size. Draw a Polyline with Straight Segments Click Home tabDraw ...

    • Microvellum Commands vs AutoCAD Commands

      Microvellum AC, as a software based in AutoCAD, possesses the full range of AutoCAD commands for use in accessing AutoCAD functions, such as drawing shapes, opening menus, altering the dimensions of polylines, etc. However, it should be noted that ...

    • Modifying Polylines

      Stretch a Segment You can select a grip to make changes directly. Select the polyline to display its grips. Select a grip and drag it to the new location. Menu Options for Modifying Polylines Several options become available when you select a ...

    • Recent Articles

    • Microvellum Release Notes | Build 25.2.0406.641

      The following release notes apply to Microvellum build 25.2.0406.641. Label Image Fix Fig. 1: An error noting an incorrect number of Label Images. An issue was reported wherein creating new G-code from an existing work order that was edited using ...

    • Microvellum Foundation Library Release Notes | Build 26.0327

      The following release notes apply to Microvellum Foundation Library build 26.0327. Additions Added new Formula Driven Materials (FDM) and accompanying special FDM project wizard. * New Specification Group “Wizard Formula Driven Materials [FDM]”. New ...

    • Formula Driven Materials (FDM) User Guide

      The formula driven material (FDM) system in Microvellum automates the creation and management of materials within a project. By using predefined lookup tables and intelligent formulas, FDM dynamically generates each material’s name, thickness, and ...

    • Microvellum Release Notes | Build 25.2.0330.641

      The following release notes apply to Microvellum build 25.2.0330.641. Formula Editor Fix There was a recurring issue wherein attempting to edit any formula within the Part Properties of the software would result in an error. This would only occur ...

    • Microvellum Release Notes: Year of 2026

      This document will catalog all releases for Microvellum software builds that are released in the year 2026. This currently encompasses builds 25.2.0114.641 to 25.1.0406.641. Microvellum Release Notes | Build 25.2.0406.641 The following release notes ...