Can you suggest a small enough, reliable, motion-resistant connector, preferably with a fixator? I encounter the problem that with the round-the-clock operation of printers, sooner or later the contacts of the print head begin to be badly contiguous. I understand that the best way is to solder the wires directly to the printhead elements, and use the connector only on the controller side. But I still want to make it possible to replace the printhead without a cable. Interested in connectors for 2,6,8 contacts.
Use XT60 connectors for the heater, they are made for high current and stay tight. The other connectors are fine for fans.
Also many failures aren’t necessarily the connector, but where the wire enters the connector. Fatigue forms there and the conductor breaks. Do what you can to immobilize the wires with some type of strain relief.
Molex Microfit 3.0 have a good latching system, many sized cases and are rated with enough amps for the heater.
I second the molex Microfit connectors. We use them at my work for our industrial printers.
missing/deleted image from Google+
As @michael_hillpot said, XT60’s would probably be great. They are often used for RC cars and can really take a beating. There are also many other types of rc plugs that would work great as well. Just depends on what you like. Some require heat shrink tubing. Others don’t.