Ramps LCD Smart controller Temperature uncontrollable raise!
June 19, 2013 08:30AM
Hi,
I have set up my LCD Smart Controller.
It is connected, it reads temperature. It does the x,y,z homing.

But I have some problems:

1) when I set the PLA preheating it does not stop at 180 Celsius. It continues to raise, more than 250 °C!

2) If I change the PLA preating values nothing changes, it always display 180°C.

3) it detects that I inserted an SD Card but I can't see anything inside (I have copied in the root a .gcode file and created a folder).

Any suggestion?
thank you,
Gaetano
Re: Ramps LCD Smart controller Temperature uncontrollable raise!
June 19, 2013 09:26AM
Update:

I can set the bed temperature from the software (if I attach ti the usb cable). It stay at 60°C.
But I have no control on Extruder temperature.

I have formatted the SD card in msdos-fat but again I can't see any files inside it.
Re: Ramps LCD Smart controller Temperature uncontrollable raise!
June 21, 2013 08:48AM
HI
it happens when you start to print, or with direct commands?
If it happens when you start a print, check the start.gcode file... maybe you have there 250º
Check your NTC resistor sensor... at 20ºC must have 100kohms. but check what kind of resistor you have, and look for a table here in the web.
Re: Ramps LCD Smart controller Temperature uncontrollable raise!
June 21, 2013 08:51AM
Thanks Novato for the reply.
The SD card is not accessible so I can't "launch" any gcode...
The problem occurs when I launch "preheat for PLA" and it goes very high in temperature even though the limit is set to 180.
Re: Ramps LCD Smart controller Temperature uncontrollable raise!
August 24, 2013 11:14AM
dos the problem only occur when preheating?
try running it form your pc and set the heat from there, what happens then?

what firmware are you running on.
i am having a similar problem with my smartcontoller and Ramps 1.4 with marlin 1.0 and 1.0.1
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