Err: MAXTEMP BED - During preheat to load filament
I finished installing my new printer, it was largely painless, great documentation, and comments.
When I preheat to load filament, the temperature starts going up, but around 160 degrees, LCD shows 'Err: MAXTEMP BED', and then temperature starts to go down. A video suggested that the thermistor cable might be sorted, but checked using a multi meter, its not shorted.
What do I do, can't wait to see the first print?
heating up:
Error, then starts to cool down:
Re: Err: MAXTEMP BED - During preheat to load filament
You probably have a faulty bed temp sensor, or a poor connection of the bed temp sensor to the RAMBo.
The bed temp is reported erroneously high,and then the software pulls an emergency stop.
Re: Err: MAXTEMP BED - During preheat to load filament
❓ are you located inside the usa (with 110v ac power grid) ? might be that your psu is still set to 220/240v ac (as required for europe).
➡ then your power supply can't deliver the amount of power needed to feed both hungry childs (hotend & heatbed).
dem inscheniör is' nix zu schwör...
Re: Err: MAXTEMP BED - During preheat to load filament
Did you maybe switch the connectors for the temperature sensors?
The self-test is faulty regarding bed and nozzle temp. It reports that all is OK when it is not.
Does your bed and your hot end actually heat up? I mean, can you feel that it gets hot?
Re: Err: MAXTEMP BED - During preheat to load filament
I am in US, voltage is set to 110v. I felt the nozzle, it heats up, bed does not. Does bed supposed to heat up when preheated?
Re: Err: MAXTEMP BED - During preheat to load filament
It really does sound as though you have the connectors in the wrong RAMBo sockets.
Peter
Please note: I do not have any affiliation with Prusa Research. Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage…
Re: Err: MAXTEMP BED - During preheat to load filament
The RED LED on the bed light up, and then goes off. Could that be an issue?
How to test heating up of bed?
Re: Err: MAXTEMP BED - During preheat to load filament
The RED LED on the bed light up, and then goes off. Could that be an issue?
How to test heating up of bed?
Your first photo at the top of the post shows that the nozzle was supposed to be heated to 215C and the bed to 55C. That is probably the PLA preheat setting.
However, it also shows that the bed temp was reported as 124C and the nozzle temp as 24C.
It looks like the nozzle temperature is being reported as the bed temperature. Because the nozzle heats up to 55C very quickly, the bed heater is then turned off (when the light on the bed goes out).
Then, the incorrectly reported bed temperature keeps rising, because it is really the nozzle temperature, until the safety mechanism kicks in and shuts everything down.
You need to check the temperature sensor cable connectors on the RAMBo. I think you have switched them over.
Re: Err: MAXTEMP BED - During preheat to load filament
Thanks that was it.
Re: Err: MAXTEMP BED - During preheat to load filament
Open again.
MAXERR by heating up the nozzle to 300° for printing some Polycarbonte.
How can I suppress this shutdown ?
Thomas
Re: Err: MAXTEMP BED - During preheat to load filament
Thomas
Maximum allowed by firmware is 305 degrees, however the thermistor will not be so accurate at such high temps and in fact it can be damaged by temps above 295 degrees.
If you need to go hotter, then you should change the thermistor and alter both thermistor type and max temp in firmware.
Peter
Please note: I do not have any affiliation with Prusa Research. Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage…
Re: Err: MAXTEMP BED - During preheat to load filament
Maximum allowed by firmware is 305 degrees
Sure ?
I never reached the 305°, so emegency-shutdown comes earlier. It comes bevor 300°.
Thomas
Re: Err: MAXTEMP BED - During preheat to load filament
Sure ?
You can see for yourself - Configuration.prusa.h:
/*------------------------------------
EXTRUDER SETTINGS
*------------------------------------*/
// Mintemps
#define HEATER_0_MINTEMP 15
#define HEATER_1_MINTEMP 5
#define HEATER_2_MINTEMP 5
#define BED_MINTEMP 15
// Maxtemps
#define HEATER_0_MAXTEMP 305
#define HEATER_1_MAXTEMP 305
#define HEATER_2_MAXTEMP 305
#define BED_MAXTEMP 150
Peter
Please note: I do not have any affiliation with Prusa Research. Any advices given are offered in good faith. It is your responsibility to ensure that by following my advice you do not suffer or cause injury, damage…