﻿ Getting Started Tutorials - MechDesigner > Tutorial 15: Patterns - Indexing-Chain example > Step 15.5: Add a Solid to Chain-Link

### Add a Solid to the Tool-Part.

We use the Pattern tool to make copies of Solid elements.

We will add one Solid element to the 'Tool-Part'. The 'Tool-Part' is one of the two Parts in the RPR Dyad. We renamed Step 15.4 one of the Parts in the RPR dyad to 'Tool-Part'.

There are two methods to add a Solid to a Part. You can do the two methods to each Part.

Use the Part-Editor to add a sketch-loop to give the shape of a Tool, then add a Profile/Extrusion element that becomes the Solid.

Edit a CAD-Line to import a part or assembly document from SOLIDWORKS®.

You can also:

Import a DXF File; then convert DXF Lines or Circles to MechDesigner sketch-elements and sketch-loop; and a Profile/Extrusion to the sketch-loop.

### Use the two methods to add Solids to a Part

#### Add a Sketch-Loop, Profile and Extrusion, and Holes

STEP 1: Add a Measurement FB between the Pin-Joints

 1.Kinematic FB toolbar > Add Measurement FB 2.Click the Point at the Pin-Joint at R-P-R 3.Click the Point at the Pin-Joint at R-P-R 4.Click the graphic-area to place

As you cycle the model you will see the length variation between the Pin-Joints is from 100mm to 93.55mm.

The distance changes:

from 100mm when the Part is along the straight length of the Belt

to a minimum of 93.55mm when Part moves around the arc/pulley of the Belt.

Thus, we must add a short 'slot' to the Tool-Part.

The images shows the sketch for the tool-holder.

There is a short slot  - (not easy to see in the sketch).

Now the shape of the Solid Extrusion is complete:

There is:

one Profile

three holes:

othe hole for the Pin

othe hole for the Slot

othe hole for the Tool-holder