To edit parameters in a dialog-box.

As we build a model, we do these steps:

STEP 1:   Add an Element

STEP 2:  Open the Element's dialog-box - see How to open a dialog-box

STEP 3: Edit the Element's Parameters in its dialog-box

This topic is Edit the Element's Parameters in its dialog-box.

A typical Dialog-Box and Parameter.

The dialog-box below is the Machine Settings dialog-box. [You will open and edit the values in this dialog-box in the first Tutorial 0].

Click the  Orange Separators  to show the two parameters: 'Cycles/Min' and 'No of Steps' parameters.

Machine-Settings dialog-box

Machine-Settings dialog-box

Parameters Details

The three areas to each parameter are:


Data-value : the value that you apply to the parameter to edit the element.


Spin-Increment: see below : Method 2


Spin-Box : see below: Method 2

There is also a contextual-menu. Right-click the data-value : see below: Method 3


Zero  : the parameter = 0 , or minimum value if the parameters cannot = 0]


Round  : the value to become the nearest value that is exactly divisible by the Spin-Increment.

How to edit a parameter in a dialog-box.

There are three different methods/procedures you can use to edit a parameter value in a dialog-box. In this example we use the Dimension dialog-box.

It has one parameter: 'Dimension'. There are three parts to each parameter box.

Method 1: Use your Keyboard


Enter a data-value directly:

1.Enter the data-value in the data-box with your keyboard - in this case '300'
2.Press the Enter key on your keyboard to update to the new value


Enter a symbolic equation:

1.Enter an equation in the data-box with your keyboard
2.Press the Enter on your keyboard to update the value

Symbolic Evaluators include

Simple Arithmetic: +, –, *, /;
Indices: ^, Sqrt();
Trigonometry [Angles are Radians], pi, Sin(), Cos(), Tan(), Sinh, Cosh, Tansh, ArcSin(), ArcCos(), ArcTan2( ; )


Method 2: Use the 'Spin-Box' tool


Spin-Box arrowheads3s4s5s6s in the blue-box to the right of the data-box

5s Top : Left arrowhead to decrease the data-value1s-red by the Spin-Increment2s [67.12345 - 1 = 66.12345]

3s Top : Right arrowhead to increase the data-value1s-red by the Spin-Increment2s [67.12345 +1 1 = 68.12345]

4s Bottom : Left arrowhead to divide the Spin-Increment2s by 10 [1 ÷ 10 = 0.1]

6s Bottom : Left arrowhead to multiply the Spin-Increment2s by 10 [1 × 10 = 10]

Note 1 :

The model frequently must re-build each time you increase or decrease a parameter value. See - Tutorial: working with large models

NOTE: To Show / Hide the Spin-Box

If you accidentally double-click the data-value, you will hide the Spin-Box tool . Double-click the data-value again to show the Spin-box tool.


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Double-click the data-box to hide the Spin-Box.

Double-click the data-box again to show the Spin-Box.

Method 3: Use the Zero/Round contextual-menu


To use: 'Zero' or 'Round' data-value:

1.Right-click inside the data box

The 'Zero / Round' contextual-menu shows.

Zero: value becomes = 0.
Round: value becomes nearest value that is exactly divisible by the Spin-Increment. [0.00001 in the image!]

Tutorial and Reference Help Files for MechDesigner and MotionDesigner 13.2 + © Machine, Mechanism, Motion and Cam Design Software by PSMotion Ltd