Custom Fixture Designer Demonstration Guide
Step by step guide of Web Fixture Designer for 4 pin CM choke
Step1 - Simple 4 pin common mode choke
This page will describe the steps needed to design a fixture for this simple 4 pin common mode choke, using the online Custom Fixture Designer.
A full test description of the part is here
Step 2 - Dimensional drawings and pin configurations
First refer to your datasheet, or manual measurements to find the separations of the pin contacts you need for your design.
In this case, we find
Row pitch = 12.5 mm
Pin pitch = 10.0 mm
Step 3 - Find the Greatest Common Divisor
The designer works by giving you a grid on which to place your chosen connectors.
First, we must find the Greatest Common Divisor (Highest Common Factor) for your dimensions, that is also one of our available grid sizes.
In some cases this may be obvious (eg 0.1" for all RM type transformers).
For more complicated cases, we have also provided an on-line tool for you to enter your dimensions, which will then advise the grid size to use.
For this example :
We entered 12.5 mm and 10.0 mm.
The tool advises to use will use grid side of 2.5mm.
4 cells for the 10mm dimension,
5 cells for the 12.5mm dimension.
Step 4 - Grid Selection
Select the gid size we have found in the above.
Step 5 - Select Parts
Select a connector type from the drop down menu.
You can use several different types on one design, if you wish.
Click the button "Explore parts for more details" to see information on the available types.
Here we have selected the first item 100-161A - Large Kelvin Blades for 0.1-1.3 mm pins.
Step 6 - Place Connectors onto Grid
Click on the grid to place the connector.
You can click placed connectors again to remove them.
The grey square areas show restricted areas where additional parts cannot be placed.
Here we have places 4 kelvin blades with
4 cells separation (10.0 mm) in the X direction and
5 cells separation (12.5 mm) in the Y direction.
When finished then click NEXT.
Step 7 - Setup Wiring
Next you need to connect your connectors to your chosen AT test nodes.
You can either :
a. click and hold on the connector, and drag and drop these manually onto each node
b. use the Auto wiring button to instantly connect them to the nearest node
Finally enter your design name and click finish.
Step 8 - Finished design and costing
A summary of your design, a unique design ID, and costings will now be shown on this page.
You can go back to it anytime through the View My Designs page .
If you would like a copy of the quote to be emailed to you, click "email me a formal quotation".
If you are ready to place an order, you can click on Place An Order.
Step 9 - Build and print custom fixture
Your design will then be printed, assembled and wired, and will look like the picture shown on the right.