As a result, at print time, I get the head temp to "run away" in the middle of printing and reach temps like 220C, in some sort of erratic fluctuation pattern. I tested the thermistor terminal on the RAMO board and it reads 61Kohms (I believe it needs to be 85Kohms). When I run the M303 s200 test I get "test failed temp too high".In desperation, I connected the hot head and its thermistor to the 2nd head terminal output of the RAMBo, but it does not seem to register presence for the head, not can I control it. I suppose it may need some configuration changes somewhere to redirect/substitute the control from head 1 terminal and it fan and thermistor outputs to head 2 and it fan and thermistor.
I was wondering if anyone knows how to use the 2nd head terminal output (and its associated fan and thermistor ports) build into RAMBo board instead of the first one, and get it to work like before the short.
I am desperate - want to print and can`t -don't want to buy a new RAMBo card-Does anyone knows how to do it?
Thanks
