Product Details Supplier Info More products

Inspection-technology company Wildtrax has used the Nordson Yestech BX system to inspect a run of five high-value PCBs containing gold-impregnated ceramic devices as part of its service to NASA.

‘Sometimes our customers have issued us with low-cost PCBs where fiducial mark positioning varies across different batches,’ said Ian Warren of Wildtrax, ‘The BX can store different versions of the board image to match each different fiducial position, then, during inspection, automatically check the board against all stored image versions as necessary,’ he said.

‘This automates a process where we previously had to keep readjusting and running the test again until the false positives were eliminated,’ he added.

This flexible automation is equally useful for handling inconsistency problems that arise because a CEM doesn’t have control over the sourcing or quality of the boards he is asked to build or manufacture.

In transferring to the BX AOI, Wildtrax wanted to make use of data for component types, orientation and positioning they already hold for all the boards they regularly manufacture and inspect.

They are achieving this by importing CAD files, singly as they are needed, from their pick-and-place machines.

These files can be readied for the BX by using Nordson Yestech’s universal CAD Translator software.

Alternatively, when Wildtrax needs to inspect brand new boards for which no data is held, the new inspection programme can be set up on the BX in typically half to three quarters of an hour.

After inspection data has been entered by either method, the BX can be toggled between boards in seconds, making it suitable for inspecting diverse, low-volume production runs.

Wildtrax claims that it particularly likes the BX’s sharper definition, colour lighting and filtration, which copes well with poor ident markings due to bad printing or bad laser etching.

The colour filters allow image enhancement to reduce the incidence of false positives.

Similarly, where specific solders are used on some production runs, the refraction characteristic can be optimised by the use of colour filters and contrast.

The side-view cameras give extra readability from their different position, as well as checking if components are down on their pads.

The BX has also introduced automation to board panelisation.

In a typical example, Wildtrax produces panels containing eight identical boards with PIC microprocessors.

On the BX, only the first board need be set up by programming, then the other seven can be set up using step and repeat.

During production, the BX can be instructed to ignore any board within the panel deemed as a ‘cross off’ for any reason.

View full profile