MechDesigner Reference & User Interface > Dialogs

Pulley

Pulley :	A rotating-Part. It is a wheel with teeth around its circumference. The teeth engage with a Belt. The angular motion of the Pulley and the linear motion of a Belt are related by the radius of the Pulley. The number-of-teeth and the Tooth-Pitch parameters control the radius of the Pulley.
Belt :	The shape of a sketch-path represents the path of the Belt. The motion of a Motion-Point on the sketch-path represents the motion of the Belt. The sketch-path needs one Arc for each Pulley. A Pulley must rotate about the center-Point of the Arc. It is a Timing-Belt (we do not show you the Teeth on the Belt). The Belt does not slip relative to the Pulleys.
There are two types of Pulleys.
Type 1: Driving Pulley :	You define the angular motion of the Pulley - the motion of the Driving Pulley controls the linear motion of the Belt. There is a maximum of one Driving Pulley per Belt.
Type 2: Driven Pulley :	The linear motion of the Belt controls the angular motion of the Driven Pulley.

Use the Pulley dialog to edit the number-of-teeth on a Pulley.

Double-Click a Pulley

To edit the Pulley:

1.Double-click a Pulley in the graphics-area or Assembly-Tree.

The Pulley dialog is now open.

Pulley Parameters

Number-of-Teeth

The number-of-teeth around the circumference of the Pulley.

The Number-of-Teeth and Tooth-Pitch (see Motion-Path FB) control the P.C.D of the Pulley and the radius of the Arc in the sketch-path.

Pitch-Circle-Diameter (PCD) - read-only

The diameter of the Pitch-Circle, which is co-radial with the neutral line, or pitch axis, of the Belt.

Belt Parameters

Tooth Pitch - read-only ( Edit with the Motion-Path dialog )

The linear distance between two adjacent teeth on the belt.

Belt Length - read-only

The total length of the belt. It is equal to the length of the sketch-loop that wraps around the Pulleys.

The length of the Belt will change as you edit the Number-of-Teeth on a Pulley,

You can select a dimension that will control the Belt-Length with the Motion-Path dialog.

Details coming soon...