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catohagen

Err: MAXTEMP BED after a weeks use (UMO)

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Posted · Err: MAXTEMP BED after a weeks use (UMO)

Hi,

I bought a Heated bed upgrade to my UMO and have been using it for about a week now.

Today I started a 4hr print with Colorfabb XT, 255C nozzle and 70C bed....after 1.5 hrs machine 'crashed' meaning the nozzle glued itself to the print because of this alarm and I guess it shut down nozzle heater and bed.

Now I cant start the bed, temp is all over the place, 100C-32C-150C-500C-48C-130C like this every 2 secs..

Anyone know if its bed is faulty or have experienced similar ?

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Posted · Err: MAXTEMP BED after a weeks use (UMO)

After a weekend with fiddling, its the connector to the heatbed thats acting up, i've

taken off the heatbed 3-4 times and 'retightened' the screws (when you tighten an already tight screw, you'll start to break the head when the screwdriver loose grip) But after a while the same error happens.

For now it last longest then I jam something inbetween the wires sticking out and the wooden base.

IMAG0060.thumb.jpg.4738d376edae8483b4d740c8cef6040c.jpg

IMAG0060.thumb.jpg.4738d376edae8483b4d740c8cef6040c.jpg

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Posted · Err: MAXTEMP BED after a weeks use (UMO)

Take it all apart - check the connections. The error is from the temp sensor - not the heater itself. The temp sensor is the smaller 2 wires. Check the resistance - it should be about 108 ohms at room temperature.

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Posted · Err: MAXTEMP BED after a weeks use (UMO)

Yes, check all the connection between the bed and the controller board.

If it their is no problem you might want to replace the thermistor or the bed.

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Posted · Err: MAXTEMP BED after a weeks use (UMO)

I took off the heater board from the bed and turned it around and added (more) solder to the

4 points to the connector, seems errors stopped.

(Read another post in this forum about badly manufactured heated beds and poor solder points)

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