Accel value and Marlin?

I have recently been playing with acceleration settings and trying ot dial in my printer. So I open up Marlin adn change my accel values under

#define DEFAULT_ACCELERATION          1000    // X, Y, Z and E max acceleration in mm/s^2 for printing moves

So I changed it to 1000. THen I upload and go into the menu of my LCD and it still says 2000 under Control---Motion---Accel

What did I not do right?

Also, while I have a new topic open...All of the sudden my manual Z moves are very slow, as are my Z homing speeds. I have not changed my Z values at all.

Edited 1 time(s). Last edit at 05/11/2015 08:13PM by windcalmer.

You need to upload then I think it's M500 in ponterface or program you use store settings to eeprom

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Check my rubbish blog for my prusa i3

up and running
[3dimetech.blogspot.co.uk]

use m501 command to check the stored value in eeprom, even if you change in firmware and reflash, the board always use settings stored in eeprom

About eeprom use:

I played around with arduino-based "multiwii"-quadcopters. Everytime I changed something, it was good practice to run an "erase all eeprom data" program, before flashing the new firmware with updated values.

Is it neccessary here too?
-Olaf

M5O3 reads from memory which brings up your firmware memory then M500 using your eeprom

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Check my rubbish blog for my prusa i3

up and running
[3dimetech.blogspot.co.uk]