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Marlin acceleration and jerk settings help

Posted by Phizinza 
Marlin acceleration and jerk settings help
November 11, 2013 02:12AM
Hi, I have Marlin on my Prusa w/gen7.

I have an issue where on sharp corners I get lifting and so far the only thing I found to help is slowing down the print.
What I would like to do is keep the printing fast but on sharp corners slow it down. Am I able to achieve this using the acceleration and jerk settings in Marlin?

These settings have worked well for me for everything but sharp corners

#define DEFAULT_AXIS_STEPS_PER_UNIT   {114.285,114.285,2560,742}  // default steps per unit for ultimaker 
#define DEFAULT_MAX_FEEDRATE          {75, 75, 4, 10}    // (mm/sec)    
#define DEFAULT_MAX_ACCELERATION      {2500,2500,800,2500}    // X, Y, Z, E maximum start speed for accelerated moves. E default values are good for skeinforge 40+, for older versions raise them a lot.

#define DEFAULT_ACCELERATION          1100    // X, Y, Z and E max acceleration in mm/s^2 for printing moves 
#define DEFAULT_RETRACT_ACCELERATION  1100   // X, Y, Z and E max acceleration in mm/s^2 for r retracts

#define DEFAULT_XYJERK                8.0    // (mm/sec)
#define DEFAULT_ZJERK                 0.4     // (mm/sec)
#define DEFAULT_EJERK                 10.0    // (mm/sec)

If I slow down the Acceleration on X and Y, and keep my jerk low will that help? I don't want to sacrifice too much printing speed.

Thanks,
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