Heatbed temp after finished print

Hi,

I have a bit of a strage problem with my software. I have an Medel 90 printer, RAMPS 1.4 + Arduino Clone. Currently I am using Repetier as firmware and Host on my computer.

Everything is looking great. And I am quite satisfied with the result I am getting. There is just one Problem:

After my prints are finished, the heatbead is getting hotter and hotter, not colder and colder.
I am shure it must be some kind of config / software error.

During the print everythins looks fine, the temperature is at my set level. After the print is finied the heatbeed starts to heat up

I checked my last lines of the GCode, but I dont see any issues from that one:

Quote

.
.
.
G1 X74.386 Y56.288 F7800.000
G1 E2.00000 F1800.000
G1 X74.963 Y56.621 E2.02770 F1260.000
G1 X75.249 Y56.604 E2.03964
G1 X101.582 Y56.604 E3.13440
G1 X102.892 Y56.932 E3.19056
G1 F1800.000 E1.19056
G92 E0
M104 S0 ; turn off temperature
G28 X0 ; home X axis
M84 ; disable motors

You seem to be missing M140 S0 to turn the bed off, however it should stay at the same temperature, not get hotter.

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[www.hydraraptor.blogspot.com]

I have almost the same problem except the temperature keeps going up and I turned off the bed using repetier and the temp still keeps going up, right now i'm printing something and the temperature is 118.40C when is set to 105C,

my printer stopped printing because the temperature reached the 120, dam another 6 minutes and I would finish that piece.

Hi,

Can you try disabling all temperature control features in Repetier Host and make those settings in your GCode? I am suspicious that Repetier host is maintaining the temperature independently of your GCode.

Whenever I use Slic3r I set the extruder and bed temperature to zero to disable its heating control function. Repetier Host may require similar action.

Regards,
Neil Darlow

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I try to write with consideration for all nationalities. Please let me know if something is unclear.
Printing with Mendel90 from fedora 25 using Cura, FreeCAD, MeshLab, OpenSCAD, Skeinforge and Slic3r tools.

@slanwar,
Does your bed heat as soon as the power is on? If so I suspect you have a shorted MOSFET. Red alert's problem is different because his temperature is controlled during the build so his MOSFET must be working.

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[www.hydraraptor.blogspot.com]

Even if I use pronterface or the smart lcd controller I have the same problem.

the mosfets i have are IRF3205 and i have another ramps with P55NF06 which the power connector burned out (the wires coming from the power supply).

Ok the problem is my ramps (mosfest I'm guessing), I pull the power connector from the ramps and installed on the original ramps that came with my kit and works fine, the only thing now I need to get to work is auto leveling which I tried every config file I found on the net and doesn't work.

Note this is a forum for Mendel90 problems. It doesn't use RAMPS.

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[www.hydraraptor.blogspot.com]

Oops

In the meantime I have solved my problem as well:
There is an option in the "Printerconfiguration", which is translating into something like:

Switch off Heatbed after job is finised (in german it is Heizbett nach Job / Beenden Ausschalten)

I have deaktivated that option. Now it seems to work.
I do not understand, but it is working

Thanks to everybody.