Bed PID settings  

Re: Bed PID settings

Is the temperature unstable?

Feel free to fiddle with firmware, it is available at our drivers download page.

Re: Bed PID settings

I was wondering, because the head is controlled with pid.

The original question was that the hardware can handle it? Or I need extra cooling for the bed's fet? Because the head is 40W,the bed is 100W.

Re: Bed PID settings

The fet will me fine 🙂 You can set it ant Configuration.h , line 188 Let me know how it works for you.

Re: Bed PID settings

After my last comment, i realised that the FET is SMD... So the extra cooling is a no-go. 🙂
Maybe with a fan.

I found the option, modified the code, made a PID autotune for the bed.

When i complile and upload, the board starts, but the screen is a mess. something is wrong with the LCD settings in the code.

I uploaded the hex file provided again, and its ok.

I talk about the "FW_RAMBO_MINI_1_3_v2.zip" file.

Re: Bed PID settings

FW_RAMBO_MINI_1_3_v2_1.zip is the same.

I'm doing something wrong on uploading?

Re: Bed PID settings

It is possible if you have the heatbed cables near to the LCD cables that you get an interference in the LCD communication with PID for the heatbed. Lot of current switched at high frequency

Re: Bed PID settings

It's not interference. If I upload any ino file (en or cz language) it's the same. Even if I don't modify the code. I tried to compile to hex and upload with your firmware updater. Same.

The screen is full of random characters from the beginning.

The only thing works, when I upload the hex file, which is in the zip.

Strange.

Re: Bed PID settings

You need to have the addons installed in your arduino http://reprap.org/wiki/MiniRambo#Firmware_Requirements

Re: Bed PID settings

Now its working!

I installed the RAMBO board addons earlier (in the sommer - i dont remember).

Now i copied a newer version from the current Marlin FW package, and it works!

Maybe it was for the Rambo and this is for the Rambo Mini to? Is there a difference between the two versions?

Re: Bed PID settings

Yep there is a slight difference in port mapping. RAMBo mini uses some pins on the MCU which are not defined in Arduino Mega 2560 or big RAMBo.

Let us know if you come up with some cool FW hacks 🙂