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New Atmega1284p doesn't work.

Posted by Tolstiy 
New Atmega1284p doesn't work.
July 01, 2014 07:25AM
Hey guys! My printer is RepRapPro Mendel Tricolour
Had to change my microcontroller to new one and after soldering it and loading the firmware faced lots of problems.
1. all endstops reporting as pressed while they aren't
2. no movement in any direction for every axis
3. LED starts glowing continually, with no flashes, for some time (about 5-10 seconds) after I turn on the hotend.

And still thermistors readings are correct, hotend and bed warming well.

Someone can tell me if this is my soldering mistake or something wrong with the microchip?

Great thanks.
Re: New Atmega1284p doesn't work.
July 01, 2014 07:02PM
Assuming you're using Marlin, you need to invert your end stops in the firmware:

const bool X_MIN_ENDSTOP_INVERTING = true; // set to true to invert the logic of the endstop.

If it's currently true, set it to false, or vice versa. Do the same for each axis. Make sure the max endstops are disabled, unless you have them.


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