That was on the TFT thread…yeah that was my fault too lol.
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Please don’t print anything with the board sitting on that microfiber. The bottom of the boards get pretty warm.
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Two different heat blocks didn;t work?
What about the bed?
Another thing to try is only heating up one heater at a time. That giant bed on a 24v heater that is going to take all the juice to get to temp, then the hotend after it is up to temp. At some point the mains voltage heaters start to make more sense. How many amps is your power supply? The CR10 300x300 take 220W at 24v alone.
I don’t remember a problem with the bed. But it is a 750w 120v heater on the bed so 24v just to switch the SSR. The heater cartridge that came with the Hemera worked just fine on the old board. But it just took so long for it to heat on this one it triggered an error. So i swapped it and the thermistor out and it was faster but still much slower than it originally was. I’ve got stuff to take care of today but hopefully this afternoon I can look into it more. I did put my meter on it last night to make sure the board was giving it full 24v and that’s when i found the power supply only giving 23v so I bumped that up to 24.5v and it seemed to heat faster. Then the next time i went to heat it up it starts moving fast but just peters out and barley moves the closer it gets to 100. The wires on the replacement (amazon cheapo) were half the size of the Hemera one so that made me thing its probably a much lower wattage heater.
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That was the closest thing i had to protect the bottom of the board from shorting out on the old board below it. I need to just mount it on the old mount for now so its much safer and I will do that before printing anything.
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Perfect!
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I also have a new power supply coming tomorrow as well. I “thought” i had ordered a Meanwell when i got this one but i was mistaken. So a 350w 24v will be here tomorrow
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@vicious1 Do you want me to send this old SKR back to you?
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Yeah didn’t I leave a return label in the box? If not I will email you one now.
Ummmmm Let me check lol. BTW got my hat today…Fits my big ass head perfect!!!
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Emailed a small flat rate box label.
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Got it. Ill get it headed back to you soon!
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DUDE, my apologies. That nightly I was all cocky about…totally breaks the 3 point leveling. I am trying to track down the commit that breaks it. I think it was the 14th they adjust g29…
Lesson learned, at your expense. Sorry again for wasting your time.
Seriously…ABSOLUTLY NO apologies needed on that. You never have to worry about wasting my time. I’m just ecstatic you are willing to help me anywhere close to as much as you have!!!
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Is it normal when a heater cartridge goes bad for it to still heat just very slowly? or do they normally work fine one day then just stop? Just trying to make sense of why all of a sudden I cant heat up. But its still somewhat heating just not completely. Is it possible that when I adjusted the heat block to get the orientation correct I screwed it on too far? would have even make a difference? its not hitting anything. I guess I’m just wracking my brain trying to make it make sense. If this is normal behavior for a failing heat cartridge then I’m good with that. I just don’t have any experience with that.
I have never had one fail. I have popped a thermistor. That to me is really weird and I have no idea why that would happen. The nozzle heater is so small.
I bet when you moved the heater block the 90 degrees to fit the fan shroud, it nearly broke a wire, or really messed it up. That or it is twisted and almost shorting.
That’s what I assumed as well and why I swapped it out. And my next assumption is this one I got from Amazon is just cheap crap. They came in a set of thermistors for one of my creality printers that I think was like $7 for 3 thermistors and 3 heater cartridges so I can’t expect too much from them lol
So curiosity got me and i googled how to test a 3d printer heater cartridge. Came across this link…
This says the resistance should be between 8.6-10.6 ohms. I tested the Amazon cartridge…14.6 ohms. then i tested the original from the hemera… 20.5 ohms. So maybe that’s why. Now I’m curious as to what the new ones coming tomorrow will read.
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A 40W heater cartridge at 24V should be around 14.4 ohms- so the Amazon one isn’t obviously bad just from the resistance.
An 8.6 ohm heater at 24V would be 67 W- which would probably be more heater than you need- but that’s probably a good lower bound for the resistance when measuring the cartridge.
If possible, unplug the heater wire connector at your control board and measure there. If there’s a wiring short or high resistance wiring, you’ll see that via this measurment.
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