marlin 1.1.4 DEFAULT_MAX_FEEDRATE not working for my printrboard rev D

I was doing some house cleaning and decided to get rid of my old printrbot v3. (It was the one that was printed, not made out of wood or metal.) I used a printrboard rev D.
I want to give it to someone I know but I wanted to give it one last upgrade before I do. So I upgraded it to Marlin 1.1.4. and added an LCD smart controller. Everything went well and it seemed to move and work fine. Until I went to print. The Z axis moves too fast and skips steps. (I checked current to stepper and it seems fine)

So I adjusted the DEFAULT_MAX_FEEDRATE from {400,400,4,45}
down to {400,400,2,45} but it had no affect.
So I went to {400,400,1,45} with no change in speed, it is still skipping steps and moving too fast.
I even tried {400,400,0.1,45} but still no change. (not sure if non integer numbers work, is this variable a float? )

Another thing I have tried is changing the DEFAULT_MAX_ACCELERATION { 3000, 3000, 100, 10000 } to { 300, 300, 5, 10000 } but no change.
DEFAULT_ACCELERATION from 3000 to 300. No change
DEFAULT_TRAVEL_ACCELERATION from 3000 to 300. No change

And yes, I did some research...
I read this [forums.reprap.org]
and followed this [forums.reprap.org]
and this [forums.reprap.org]


Does the AT90USB1286 have an issue?
When compiling it seems to have enough space and memory...
Sketch uses 113,134 bytes (86%) of program storage space. Maximum is 130,048 bytes.
Global variables use 4,056 bytes (49%) of dynamic memory, leaving 4,136 bytes for local variables. Maximum is 8,192 bytes.

I also changed my max_step_frequency from 40000 to my original sprinter firmware (30000)

What am I missing??????

Thanks for the links, always good to see what you have tried.

My guess would be that the old values are still stored in the EPROM and are overriding your changes. Try M502 to load the new values from the firmware then M500 to save

Ahhh, your right!
It is loading all the settings from the eeprom.
Even when I change things like the custom name on the LCD, I can see the change, but it doesn't update the settings, it loads them from the eeprom.
I now have to change the setting from the LCD screen.
How do I change that?

Anyway, hope that helps out anyone else that is having this problem.

Edited 1 time(s). Last edit at 08/14/2017 08:41PM by douginarug.

From the LCD menu got to control > Init EEPROM

This should load the default and save to the EEPROM by sending the M502 and M500

[marlinfw.org]