POL

Our solution for big PCBs

Ideal for large boards or complex assemblies

Guiding of the board via the outer geometry or by means of catch pins

High and protruding components are taken into account

Individually adapted to your blank geometry

Layout of the test probes exchangeable

High and protruding components are taken into account

Long service life and easily replaceable wear parts

Optionally with double-sided contacting

On request with integrated limit switch, connectors, switches, display elements, fan, lens, etc

Download product sheet POL

Variant

Animations

Examples

User Interface

The additively manufactured housing can be customized as desired. In this case, two buttons and a display were to be integrated into the test fixture. This eliminates the need for an additional PC or monitor. If a controller is also installed in the test fixture, it becomes a mobile standalone system, which is particularly convenient if you want to provide the fixture to your manufacturer.

Any Interfaces

The connector interface is located on the back. You specify which connectors should be installed and their pin assignments. If necessary, you can, of course, handle the wiring yourself.

The Centerpiece

When possible, components on the bottom side of the unit under test are merely recessed in the spring-loaded carrier plate. Tall components may need to be fully recessed. Occasionally, recesses in the CNC-milled probe plate are also required. The probe plate typically contains the locator pins. This ensures a short tolerance chain for positioning the PCB. Any inaccuracies in the 3D-printed components do not affect the positioning accuracy of the PCB relative to the pogo pins, ensuring that even the smallest test points can be contacted reliably.

Integrated Electronics

It is not only possible to contact both sides, but PCBs can also be placed directly on the opposite side of the probe plate, eliminating the need for wiring and ensuring the shortest possible signal paths. This also allows for pitches well below one millimeter.

Double-sided contact

An example of double-sided contacting. The upper needle bed is aligned by the same locating pins as the sinker to achieve the highest possible precision. Since the pilot pins are in the CNC-milled needle bed, the tolerance chain is kept low and tolerances of the additively manufactured components have no influence on the accuracy of the test contact pins.

When rigidity is required

Even 3D printing has its limitations. For very large circuit boards, we therefore reinforce our designs with aluminum strut profiles and increasingly rely on CNC-milled components.

Test levels

In many cases different levels are contacted. This is particularly the case when test points on the circuit board and assembled connectors have to be contacted at the same time. Spring contact pins with different lengths can be used for this. In the case of large height differences, however, indentations or elevations can also be provided in the needle bed.