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no heating RAMPS 1.4

Posted by id114317 
no heating RAMPS 1.4
March 05, 2014 01:45PM
Hi everyone
I have RAMPS 1.4, ATX 350W from PC, Marlin and Pronterface on my Mac.
I connect everything like this
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?
Re: no heating RAMPS 1.4
March 05, 2014 02:11PM
when i upload the RAMPS test firmware and start it everything OK.
HeatBad begin some heat.
i think reason in Marlin firmware.
Re: no heating RAMPS 1.4
March 05, 2014 09:52PM
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).
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