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no heating RAMPS 1.4

Posted by id114317

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id114317

no heating RAMPS 1.4
March 05, 2014 01:45PM

Registered: 10 years ago
Posts: 2

Hi everyone
I have RAMPS 1.4, ATX 350W from PC, Marlin and Pronterface on my Mac.
I connect everything like this

500px-Rampswire14.svg.png

set heatbad temp and press "set" button, and there is no heating.
i check the voltage on heatbad connectors with multimeter - 0V

where i am wrong?

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id114317

Re: no heating RAMPS 1.4
March 05, 2014 02:11PM

Registered: 10 years ago
Posts: 2

when i upload the RAMPS test firmware and start it everything OK.
HeatBad begin some heat.
i think reason in Marlin firmware.

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Cefiar

Re: no heating RAMPS 1.4
March 05, 2014 09:52PM

Registered: 14 years ago
Posts: 1,092

Do you see a temp listed for the heatbed?

If the thermistor for the bed is not connected, or if it's too cold (below about 15 C, somewhat thermistor dependant), it won't turn on the bed as it suspects there is no thermistor (and won't know when to turn it off).