Hello,
During printing the temperature drops about 30°C, from 210° to 180° resulting in an bad top layer. The voltage over the heating element is 13.4 V, wich I think is a bit low. Now we can’t print with other filaments that require an higher temperature, like abs, due to the temperature drop. Is there a way to increase the voltage?
Kind regards,
Jens
I’m having the same problem. When the temperature drops, the printing stops as the printer is trying to heat the head but can’t reach the minumum temperature (or that’s what I think is happening). My guess is that the heater element is damaged and draws more current than before (which drops the voltage) but can’t produce enough heat.
I have ordered a new heater element and I’ll let you know if it helps.
If I’m correct, the element is 15V/33W so it should draw 2.2A and the resistance should be around 6.8 ohm so this should be easy enough to measure.
Check if the thermistor is correctly seated in its hole. Event if it is, the contact between the heater block and the thermistor is far from effective. So the displayed temperature is usually way lower than the actual one (at least 20°C). It means that the right temperatures to select are about 190°C for PLA and 220° for ABS.
There’s another issue with the small fan blowing on the heater which is also responsible for a temperature drop. Try moving it in a more horizontal position.
I’ve also lowered the fan speed in the Start G-code from M106 S165 to S80.
You should also check the screw connectors for the heater block.
Mine have come loose a couple of times.