Anet a8 will not heat up to 190… warms up and sits around 140 to 150. Have tried preheat and printing. Any thoughts or suggestions? Anything would be greatly appreciated.
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Apr '17last reply
Apr '17- 7
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You’ve got three possibilities by my count…
1.) The thermistor is bad. The heat cylinder is heating correctly, but the temperature isn’t being reported correctly. (Doubt it.)
2.) The heat cylinder is bad. They are relatively easy to replace, so may as well confirm it’s not the heat cylinder.
3.) The controller board has a problem. It could be as simple as a bad solder (or whatever is used these days) on the connector for the heat cylinder. It could be messier. A few bucks, but again, it’s relatively simple to replace a controller board. Much easier than trying to fix one, at least for someone with my limited level of electronics knowledge.
Good luck!
I just changed out the thermistor and heat cylinder… hoping it’s not the board.
Did you measure your psu? Maybe it’s below 12 volts
Can you measure the voltage on the board when powered?If it’s lower than 11.5v you’re likely to get problems as it can’t draw enough power.
I boosted the voltage output of my power supply to 14.6v to get the extra required power and now can hold 117C on the bed. Before that, it would max out at about 85-90c.
Never had your problem with the hot end though. Might be worth swapping the heater cartridge as they’re cheap.
Hey!
Here at CZ we have an a8 as one of our long job pla printers (Works excellently for most materials)
Can you manually measure the temp on the heatblock?
Do that,
result a - Shows higher temp than display = Faulty Thermistor / thermistor is incorrectly installed
result b - temp shows the same = mistake in slicing settings, incorrect voltage is reaching heating cartridge/ cartridge is damaged or faultyboard/ wiring is incorrect (We had to replace the board, hot end and add a mosfet to ours to get it to pro specc but the replacement s were identical to what was shipped with it)
You must have either a bad temperature sensor or a bad heater.
Is the temperature sensor still buried inside the heater block?
I think this is why people install MOSFETs to their heat bed and extruder head. Check the Facebook page on A8 Reprap and there is lots of talk and links to buy these MOSFETs.
hth