I did however find my y motor fan was shorting. Maybe this was the case?
It will work - I use that approach on one of my printers (the others are all running with Manta boards).
The 5V Buck supply on the Octopus can more than handle the 2.5A draw of the Raspberry Pi as well as manage everything else.
What gauge wire did you run from the Octopus to the Raspberry Pi - if youâre too small a gauge then you wonât be able to pass enough current through it. You should be using at least 20 AWG with 18 AWG being optimal.
I see your sending the images - however, I would like to see a schematic showing how the power supplies are wired in.
Can you explain in more detail? If itâs taking out the 24V line, even for an instant, than that could be your problem.
Im using 22awg shielded here.
Thatâs not enough for the current required by the Raspberry Pi.
If you look at the schematic for J26, you can see there are multiple pins for _5V and Gnd - if you keep your wiring short then you can probably get away with doubling up on these pins without any noise issues.
I will stay external for now then for power, but that fan was literally just hard shorting the solders joints came free from moving it around too much. But i will see if i have any thicker wire.
i mean everythin i have is wired in 22awg should i be really conerned?
well its mostly all 24v besides the probe but even that cable seems like its 22awg
What are you using the 22 gauge for? If itâs carrying more than 1A then, yes, you should be concerned otherwise no worries.
Fans typically draw around 100mA so it should be fine.
But, the Raspberry Pi will require a thicker wire.
The steppers, steppers are stock wires tho standard JST run currents are 1.2 amps new steppers will be 1.7 ish when they arrive?
Maybe thats why i cant run them at speed without gettin HOT
Standard Stepper wires (ie that come with the motors) should be good for 1.2A.
Now, if you run them at 1.7A, youâre going to be generating a bit of heat not only in the wires but also your stepper driver chip.
Why are you going so high? I am able to run at 0.8A on my 2.4.
i want to go fast of course
How did you evaluate the need for the currents that you are drawing?
1.7A is pretty extreme and Iâd suggest that you back off on the current (go to 1.2A?) and see how things run - itâs easy with the TMC2209s that youâre using.
Just looking at the picture you sent, it ainât that big or heavy.
Can I make a suggestion?
Rather than continue this back and forth, could you:
- Try reducing your stepper currents to see if you can get a significant reduction while still maintaining your desired speed?
- Look at powering your Raspberry Pi from the Octopus as suggested (and, if youâre using 22AWG on the wires then double up on the +5V and run them to pins 2 & 4 on the rPi and double up on the GND and run them to pins 6 & 14 on the rPi).
- Look at what @DerGrinch just posted as it kind of twigged on me that I didnât ask what the 24V power supply youâre using - is it still the Ender 3âs that came with the original printer? If it is, then youâre probably drawing too much current your drawing. Could you make up a power budget for your printer?
- Draw a power schematic for your printer.
Talk soon!
im running 1.2 right now i have 2004s motors coming soon.see how they run at higher accel, may return them for 2504s.
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