Re: Which FDM printer?
Posted: Wed Mar 02, 2022 8:49 pm
PM Sent sir!
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At the mo I've been unable to find the wattage of the printer power supply. All I know is that the printer works on 24v and as far as I can see it takes about 7A. The Raspberry Pi seems to need 5v, 3A, so I'll need an appropriate voltage regulator, which isn't a problem, but until I can look at the ratings on the printer power supply unit I won't know how much spare it has. There are loads of units from the same manufacturer in both 12v and 24v flavours, with a pretty amazing range of amperages, so I might be lucky...watch this space. Printer is coming tomorrow, DPD permitting.HugoFitz wrote: ↑Wed Mar 02, 2022 9:41 am
I'd second making sure you have enough power!
I get not wanting more plugs, I'm the same.
The good news is that Octoprint will let you know if it's suffering under voltage. Give it a go powering it off the printer but be prepared to use a separate PSU if you get under voltage warning...
Thanks Steve, but I have acquired a 3B+ from Hugo and I've sorted out my 13a sockets situation so I'm getting a 5.1v 3a Raspberry approved unit from Pi Hut. It is as intended for the 4's so will give me a degree of future proofing, if and when, and it's actually cheaper than the unit intended for the 3's!
Thanks Hugo. I've already got one, thanks, because my laptop only has USB C's and I've had to get all sorts of adapters to plug things in. It's a real pain sometimes!HugoFitz wrote: ↑Fri Mar 04, 2022 10:36 am Just a word of caution re PSU's
The Pi 3B+ is USB Micro, the Pi 4 is USB C
If you get the 5.1V 3A from PiHut make sure you get a C to Micro adapter at the same time
https://thepihut.com/products/usb-c-to- ... sb-adapter
Never cut the red wire!!!!!!!!!!!!philipy wrote: ↑Sun Mar 13, 2022 10:56 am Thanks Jimmy.
The printer itself only has a simple on/off switch which 'appears' to work instantaneously. i.e switch it off and the lights and fans stop immediately, so I'm assuming ( I know...!) that it will make no difference switching off at the mains rather than via the switch.
There is one oddity in the wiring though. The Pi has it's own supply and is connected to the printer via a USB cable and if the Pi is plugged in but the printer is switched off, the LCD display on the printer comes alive and gets some sort of power supply from the Pi via the USB. I've seen various people advcating a slip of tape on the live strip in the USB plug to stop it, and even one guy who said that he cuts the red wire!