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Switch on/off heated bed after printing

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If I understand you well,

// M140 - Set bed target temp as end g-code does not work because it does not control your heated bed.

So the question is :

- can I connect the ulticontroller to my heated bed

- can I make a connection in series between the two "switches".

To cool down quickly, you could use

// M106 - Fan on

// G4 - Dwell S or P

// M107 - Fan of

I am just guessing.

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I use UM with the Ulticontroller.

I have a heated bed with an external controller and display. I want to switch it off after printing. To save power and to cool down. How can I do this without connecting a PC to UM?

Thanks Franz

Hi fboth

Look at this http://forum.ultimaker.com/viewtopic.php?f=6&t=1087 post about a suicide switch for the UM. You should be able the plug you HBP into the socket as the UM and switch it off after.

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Dear Filipo,

thanks for your reply.

If I could use the heated bed with the Ulticontroller I would do it.

I would connect a Relay, which I have already bought and mounted to the Heta Bed 1 Output and the thermistor to the Heat Bed 1 input.

What do I need to do then in the Software or is everything ready to be used?

I am not an expert in programming the firmware.

Many thanks for your feedback.


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Dear all,

finally I got my heated bed working fine. Thanks for your help.

I could make use of Daids firmware setup program and then connect my heated bed.

I use 100k NTC and an extra power supply controlled by a relay connected to the HeatBed output.

Bed temperature is about +/- 3°C close what seems ok.

Now I will make some trials.

Best regards


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