Hello all,
Can I run the printer without heatbed?
How to change settings to do it?
I have problems, can´t run a job because heat bed Temp. is 0
Checked all cable and NTC, don´t know what to do…
Have tryed with new controllerboard still the same!
When I switch the temp. pins from extruder to bed, it shows bed is at room temperature!
Please somebody help me!
[quote=“Topbox”]And what temperature does the extrude show when you plug the bed into it?
If its zero then you have a short in your bed sensor wiring.
And yes you can run it without the heated bed, just change the temperature in the slicer configuration to 0C.
Trouble is nothing will stick to the bed.[/quote]
Hi
When the bed is plugged to the input of extruder, bed shows 20* and extruder 0*
When it’s plugged correctly, bed 0* and extruder 20*
And the bed isn’t heating aswell…
I measured at pins (behind wires) both NTC’s are by 100kohm.
In case of that there can’t be a short or am I wrong.
0C indicates an open.
From your description it sounds like it maybe the board.
Look and the pins for therm 2 and make sure the solder joints are ok
If you decide to print without heating the bed you can put blue painters tape on it.
Do not let it overlap.
You will also need to recalibrate the Z-axis
But you should look into getting this fixed.
[quote=“Wrong Way”]0C indicates an open.
From your description it sounds like it maybe the board.
Look and the pins for therm 2 and make sure the solder joints are ok
If you decide to print without heating the bed you can put blue painters tape on it.
Do not let it overlap.
You will also need to recalibrate the Z-axis
But you should look into getting this fixed.[/quote]
The Board is new, had same problem with first board.
The solider points are ok, I renewed them.
Made a second power supply for the heat bed so it heats (temp. in Reptier still 0)
But forgotten to measure the NTC at heating process…
I tried to set bed temperature to 0 at settings, but the k8200 still not start printing, I think there should be an other setting safety point, what prevents me to start the program.
Tomorrow I will renew the wires of the bed, to exclude the errors again…
Unplug Therm2 and check the resistance at the plug not the board.
Should be around 100K.
When you swapped them you said that the bed was reading 20C correct?
[quote=“Wrong Way”]Unplug Therm2 and check the resistance at the plug not the board.
Should be around 100K.
When you swapped them you said that the bed was reading 20C correct?[/quote]
Sure I did check it at plug, it is 100K! The values are correct…
Yes exactly, I swapped them and the bad temperature is 20C.
Like temp. in room, therefore correctly.
Weird isn’t it? I am electro-technician,
but have no explanation for the error.
That’s why i ask here for help.
In my opinion it can be a setting problem in my software.
If your getting 0c on the bed this indicates a hardware problem
Since you swapped therm 1 and therm 2 and the bed showed a temp it sounds like a problem on the board.
Hello,
I have just recovered from this very same issue.
I had spent a bit of time today replacing existing power supply and wiring up a second supply to power the bed.
After I did this I updated the firmware to the marlin v2.
When I started Repetier-Host I was reading 0 Celcius on the bed and therefor was unable to power it, my hot end was reading roughly 16C
When I swapped the headers for hot-end and bed thermistor, my hot-end was reading 0 Celcius in Repetier, and my bed was now 16C.
HOWEVER
this was only displaying the bed at 16C because it was reading off the bed input (It was actually measuring the hot-end)
whilst the hot-end was displaying 0C (this was actually reading the bed temperature through the hot-end input).
I believe this is what you were reading, which actually signifies that the input and board is working correctly, as both inputs have produced an accurate reading, whilst the wiring, or thermistor, itself is the issue
I completely rewired the bed and returned the headers to their correct position and repowered and reconnected the machine to the computer, and restarted Repetier-host.
Bed temperature was still 0C.
I then closed rep-host, disconnected printer, and powered off, and swapped headers again, checking all connections and solders carefully.
I then again repowered, reconnected and restarted rep-host and I was now finally getting readings from BOTH thermistors, albeit in the wrong connection.
For the last time I turned everything off, switched headers back to their correct position and restarted everything and FINALLY had both thermistors measuring accurately in the correct orientation.
My advice is to double check what you are measuring and therefor interpreting from swapping headers, triple check all wiring and connections, and repeat multiple power cycles in order for the board and software to detect any changes.
I really hope this helps