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Heating failed, Heatbed
Tim92
Posts: 12Member
Hi,
I own a new A5 printer since 4 days.
The first few prints worked fine.
Since yesterday I got the Error: Heating failed, system stopped! Heater_ID: bed
It only happen if I want to print ABS with 110C bed temperature, the day before it worked fine.
The error occurs after some minutes and the bed reached 100-104C.
My ntc of the bed is about 90k at room temperature. My power supply is set to 24,50V
I use the community firmware.
Any ideas?
I own a new A5 printer since 4 days.
The first few prints worked fine.
Since yesterday I got the Error: Heating failed, system stopped! Heater_ID: bed
It only happen if I want to print ABS with 110C bed temperature, the day before it worked fine.
The error occurs after some minutes and the bed reached 100-104C.
My ntc of the bed is about 90k at room temperature. My power supply is set to 24,50V
I use the community firmware.
Any ideas?
Post edited by Tim92 on
Comments
Unfortunately, the power supply in the A5 is not able to output enough power to reach 110C. Most can reach 105C-108C. You could try and cheat, by increasing the 24.5V to the maximum setting... the fans will be ok with a little more voltage, and this may enable you to reach 110C reliably. There is normally a small potentiometer on the power supply that can be turned to adjust the output voltage a little. A small increase (26v - 27V) may be sufficient.
Any cheap power supply which is better?
And then the power supply will be larger too, so you may have to use it externally.
There is a big jump in price and power, from 24V, 360W (stock) ---> 24V 480W.
With 110C there are no problems without build plate adhesion.
its strange that it worked yesterday, I only added a led strip to the power supply, but I tested it today without the strip with the same problem
I replaced the ntc of the heatbed too. Any other options beside the firmware changes?
I changed the firmware, but with the new power supply its not possible to reach 105C anymore.
But I also installed a raspberry pi on the same supply
Power = Voltage * Current
Voltage = Current * Resistance
therefore Current = Voltage ÷ Resistance
hence, Power = Voltage * Voltage ÷ Resistance.
Since Voltage is fixed 24V, and Resistance of the bed is unchanged, then there is no way to increase the power to the bed further.
The exception is where the original power supply was insufficient, and unable to maintain 24V when the bed is on.
I'll also test the cork insulation
No, all the high voltage parts should be fine up to 30-32V generally.
The 5V parts must be used only at close to 5V, but the 24V parts are generally more tolerant.
Now I'm pretty satisfied about this printer. The price is awesome for the quality.
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