### Performing a Leapfrog Operation

The Leapfrog alignment allows you to move your portable CMM in order to measure parts that outside the extents of your current arm location. You should be aware of machine accuracy limitations before using this method.

The basis for leapfrog is to measure a series of features, and then after moving the machine, re-measure the same features in the same order. This creates a transformation and makes the machine behave as if it were the same coordinate system before the move.

The transformation is independent of all part programs and affects the way the CMM reports to PC-DMIS. To remove a previously used Leapfrog transformation you must reset the Leapfrog by using the Reset button on the dialog box.

Leapfrog is available for some portable machines. Currently these include ROMER, Axila, Faro, Garda, and GOM. Your hardware key (portlock) also needs to be programmed to support your portable machine.

The Insert | Alignment | Leapfrog menu option brings up the Leapfrog / Relocation dialog box.

Leapfrog / Relocation dialog box

Prior to PC-DMIS version 4.2, Leapfrog transformation information was stored in a separate file and was thereby independent of all part programs. This meant the Leapfrog was still active in newly created part programs and you had to remove it by clicking the Reset button on the Leapfrog / Relocation dialog box. In version 4.2 and later, however, this has changed. Leapfrog transformation information is now stored with the part program that used the Leapfrog operation; you no longer have to remove the Leapfrog from new part programs.

A Leapfrog command is entered into the Edit window when the Accept button is clicked.

The command line in the Edit window would read:
LEAPFROG/TOG1, NUM, TOG2

TOG1: This first parameter in the Leapfrog command is a toggle field that relates to the three types available in the Measure 3 area of the dialog box. These types include:

1. SPHERES (Measure 3 Spheres option)

2. Point Sets (Measure 3 Points Sets option)

3. POINTS (Measure 3 Points option)

4. DATUMS (Measure Datums option)

There is also an OFF value for this parameter, in which case the other two parameters will not be displayed. The OFF value will turn off leapfrog translation

NUM: This second parameter in the Leapfrog command is the number of hits you want to take. This corresponds to the Hits box in the Leapfrog dialog box.

TOG2: This last parameter in the Leapfrog command is a toggle field allowing you to switch between either a FULL or PARTIAL leapfrog. This parameter corresponds to the Half Relocation option in the dialog box.

When this command is executed you will be prompted to take your hits, and after all the hits are taken, a leapfrog translation will be in effect.

More:

Measure Options

Number of Hits

Half Relocation

Datum Program File

Available and Used Lists

Measure Marked

Measure All

Results area

Reset

Accept

OK