Geeetech

I have been trying to set up a GT2560 for a printer that has a bad board.

I have configured a version of Marlin that throws no errors except this one:

Global variables use 15099 bytes (184%) of dynamic memory, leaving -6907 bytes for local variables. Maximum is 8192 bytes.

Arduino version 1.8.8
Board selected: ATMega 2560

I have also tried to compile it and verify in Arduino 1.0.1 but there is a host of errors that pop up stating that the 1.0.1 is unable to compile and needs a newer version of Arduino.

So then I tried compiling with version 1.6.8 the minimum release allowed by Marlin firmware and got the same message:
Global variables use 15,159 bytes (185%) of dynamic memory, leaving -6,967 bytes for local variables. Maximum is 8,192 bytes.

I have also tried a stock version of Marlin just to see if it was my configuration that is too large. That is not the case, every version of Marlin 1.1.9 does not load.

Does this mean we cannot update to newer versions of Marlin or use this board for other printers? If that's the case it's a shame.

Thanks for any information you can provide.

Hi,

I spent the last weekend upgrading my i3 Alu to a GT 2560 Rev A+ board in a self printed case and 3D Touch sensor as well as 2 TMC2208 drivers.
I also got several error messages but they were not related to memory issues.
It took me a while to sort out these errors and finally I managed to upload a working Marlin 1.1.9 firmware.

If you are interested I can upload it here later. It might not fit your configuration but it might help.
It is based on this thread:
http://www.geeetech.com/forum/viewtopic ... 80&t=62050

The final modification is using the PWM fan output port to control my LED case light.

Best regards

Onki