I have the Rambo 1.4 board and printed a case for it. https://www.thingiverse.com/thing:3400866 …I am installing a fan on the Fan-2 port. I don’t have a connector that will fit…it doesn’t appear to be a standard connector. Could someone advise me please on what connector goes here? Thanks!
I have the same case with a fan. I wired my fan directly to 12V as it comes into the case, so the fan comes on when the board is powered up. According to the schematic for the Rambo 1.4 board, there are a pair of 12 power pins (labeled X30A and X30B), but I don’t spot them on the picture, and I’m away from my machine. If you connect to Fan2, you will need to turn the fan on. This can be done by executing an M106 g-code.
I use Fan2 to control my spindle, and used female Dupont connectors to tap into the Fan2 pins. There is probably a locking plug that fits that socket, but the Dupont connectors will do the job.
Edit: I found a couple of higher resolution pictures of the Rambo 1.4 board on the net. If you click on this picture of the Rambo board in the V1 shop, you will find the 12V power pins on the very right of the board, just above the bottom mounting hole. Dupont connectors will work well to connect to these two pins.
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Are you perhaps looking for these terminal blocks?
Edit: Oops, those are for the extruder fans…
It’s one of the Molex locking connectors though, I can’t find the link, but I have a set of them…
Final edit. Disclaimer – I don’t have a RAMBo board, so I can’t 100% guarantee that these are indeed the correct ones, but I’m reasonably sure that this is the style for the 4 pin motor connectors.
Thank you for your response. That is a great idea to patch the fan into the power input…and have it come on with the machine. I was going to use Fan-2 as it seemed to be the only fan connector…where is Fan-1? I have already patched the logic into the motors input. The characteristics of the circuit doesn’t change by adding more circuits to the power input? I am no expert but I seem to recall that it did change the current, voltage or something. I will do this though as it is exactly what I want…the fan to come on with the machine. If it worked for you it should work for me. Thanks again.
Thanks for your response. I was going to use the Fan-2 port as I saw no other. However, as the other response stated, I think I will patch the fan to the power input and have it come on with the machine. Thanks again.
where is Fan-1
If you take a look at this connection diagram, at the top of the image and below each Extruder header you will find Fan0 and Fan1.
I am no expert but I seem to recall that it did change the current, voltage or something
Your power supply will adjust to keep the voltage relatively constant with varying loads, and the current draw of your cooling fan is next to nothing compared to the stepper motors. As long as you keep your total current draw below the limit for your power supply, you are good shape.
Just for the sake of completeness, there is another way you can do the fan. If you purchase a 5V fan rather than a 12V fan, there are lots of 5V power/ground pairs on the Rambo board.