How to install the HP45 connector

A project log for Oasis 3DP

A powder and inkjet 3D printer based on HP45 inkjet technology

Yvo de HaasYvo de Haas 11/02/2018 at 19:050 Comments

I sell HP45 connectors on Tindie. In order to prevent the misery that is the connector falling apart, I am writing this guide.

The kit of the HP45 connector contains several parts:

The footprint of the HP45 connector is in the design files, or as a separate download here. This footprint should be on a PCB of 1.6mm (or thicker) since the 52 springs will push against the PCB. The pads should also be gold plated, since the springs only make direct contact, and are not soldered in place.

Mounting the connector

To mount the HP45 connector you will need a Phillips 1 screwdriver and a 2.5mm Allen wrench.

  1. Take the HP45 connector and place it pins facing up, so you see the screw head.
  2. Remove the screw using the 2.5mm Allen wrench (but do NOT lift the connector up).
  3. Flip the HP45 connector WHILE holding the back cover on the back.
  4. When the pins are facing down, you can remove the back cover to expose the springs.
  5. Align the PCB with the 3 centering pins, and place the PCB over the connector.
  6. Take the 2 washers and screws and place them in the 2 outer most holes (3.3ish millimeters).
  7. Push on the PCB to make all the springs compress so there is no gap between the PCB and the connector.
  8. Take the Phillips screwdriver and screw the screws into the connector. Do not over tighten, this will strip the threads you make out of the plastic.
2.5mm Allen wrench and Phillips size 1 screwdriver
Place connector in this position
Remove screw
Flip connector WHILE keeping the cover on the back
Remove the cover from the back
Take PCB
Align holes and place PCB over connector
Place the 2 washers and 2 screws
Tighten screws in connector

The connector is now ready for use.