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MINTEMP BED/MAXTEMP Errors  

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trevor.b
(@trevor-b)
New Member
MINTEMP BED/MAXTEMP Errors

I'm getting multiple failures of the printer - first one was thermal runaway, next MINTEMP BED, now MAXTEMP. I've checked connections to the controller board, hotend, etc. I'm getting very disillusioned with this printer, I get more print failures than successes.

Any ideas what is going wrong?

Regards,

Trevor

Postato : 25/11/2017 11:49 pm
Knickohr
(@knickohr)
Utenti Moderator
Re: MINTEMP BED/MAXTEMP Errors

Cable break at the heatbed or bad connection of the plug in the RAMBo box.

Cable breaks in general.

Thomas

Postato : 27/11/2017 10:40 am
trevor.b
(@trevor-b)
New Member
Topic starter answered:
Re: MINTEMP BED/MAXTEMP Errors

Thanks for the response.

Latest update. I've checked the connections to the Rambo board and they appear fine, pre-heat works properly with bed and hotend getting up to temperature. Managed to get the XYZ - calibration routine completed again and tried to print the calibration test print however what I'm seeing is the printer go through the pre-print calibration process, the head moves back to point 1 and then everything stops, screen shows 'Prusa i3 Mk2 Ready' and the bed and hotend start to cool down.
Tried a different set of gcodes and the same process happens.
Firmware is updated to latest version.

Trevor

Postato : 02/12/2017 1:02 pm
Antonis DSAW
(@antonis-dsaw)
New Member
Re: MINTEMP BED/MAXTEMP Errors

Does it happen at a specific temp?
Had a similar problem and it seems was a couple of issues at once. Bed sensor was not working 100%, original bed PID was not ideal.
Cables used for the bed are not the best choice, switched to 16AWG silicone multistrand wire and also added a 6mm cork under the bed to keep the temp there. Last but not least this to me was happening on high bed temps. and it was 100% sure to happen if a minor ABS, Z-Ultrat part was printed close to the sensor position.
After the above changes i saw a brighter heat LED, faster temps on the bed and easier to maintain temp.
If i had to print small part i would choose some corner and also an enclosure.

Postato : 05/12/2017 2:06 pm
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