Dialog: Function-Block: Motion

<< Click to Display Table of Contents >>

Navigation:  MechDesigner Reference & User Interface > Dialogs >

Dialog: Function-Block: Motion

Motion FB

see Add Motion FB

A Motion FB is a direct a link to a Motion, which is identified by its Motion name-tab in MotionDesigner.

After you edit a Motion FB to select a Motion:

•The motion-data at the input-connector to the Motion FB control the X-axis of the Motion

•The motion-data at the output-connector from the Motion FB correspond to the Y-axis of the Motion

Note: The Motion FB selects the left-most Motion name-tab as the default motion.

How to open the Motion FB dialog

MD-Icon-FB-Motion

To open the Motion FB dialog

1.Double-click a Motion FB in the graphic-area

OR

1.See How to Open a dialog

The Motion FB dialog is now open.

Motion FB dialog

Motion FB dialog

Motion FB dialog

tog_minus Motion Parameters   
MD-DIALOG-FB-MOTION-MOTIONPARAMS

Select Motion:

Click the drop-down box to select a motion.

The default link is to the left-most Motion name-tab and Motion.

After each Motion Cycle:

A Motion-Cycle is one revolution of the Master-Machine Angle - from 0 to 360.

After each Motion-Cycle, you can:

◉ Reset Output: (default)

Start-Position (Machine-Cycle N) = Start-Position (Machine-Cycle 1)

◉ Accumulate Output:

Start-Position (Machine-Cycle N) = End-Position (Machine-Cycle N-1)

Output Data-Type:

◉ Motion : (default, for Rockers and Sliders)

◉ Linear *

◉ Rotary *

* You must select Linear or Rotary if you connect a wire from a Motion FB to a Motion-Path or a Math FB.

Notes :

Usually, the motion-data at the input to a Motion FB increase at a constant rate from 0 to 360, again and again.

However, the motion-data at the input to the Motion FB can fluctuate in any way.

For example, the input can be from a Motion FB, a Point-Data FB, or a Measurement FB.
tog_minus Pattern  

Ignore this separator
tog_minus Query  
MD-DIALOG-FB-MOTION-QUERY

Enter a Y-axis value

The values in the box (below) are the X-axis values that relate to the Y-axis value for the Selected Motion - see Motion Parameters

Reset or Accumulate after each Motion-Cycle?

This is best explained with an example model:

1.Design an Indexing Motion in MotionDesigner with two Segments:

Segment 1: Index (X-axis: 0-240; Y-axis: 0-90)

Segment 2: Dwell (X-axis: 240-360, Y-axis: 90).

2.Connect a Linear-Motion FB to a Gearing FB. Connect the Gearing FB to a Motion FB. Connect the Motion FB to a Motion-Dimension FB which controls an rotating Motion-Part.

3.Edit the Motion FB.

Select the Indexing Motion you have designed.

Select Reset as the After each motion-cycle parameter

4.Edit the Gearing FB.

Edit the Gearing Ratio. Enter 4

Result:

As the MMA increases from 0 to 360, the output from the Gearing FB increases from 0 to 1440  ( Gearing Ratio × 360 )

As the MMA increases from 0 to 360, the output from the Motion FB increases from 0 to 90, and jumps to 0 again each time the input is an integer multiple of 360.

The indexing-shaft resets its position 4 times.

Now, select Accumulate Output as the after each Motion Cycle parameter

The indexing-shaft indexs 4 times, to make one complete revolution, as the input increases from 0 to 1440.