psdesign2018
Posts: 3
Joined: Fri Dec 15, 2017 12:24 pm

best acceleration and jerk starting scripts

Fri Dec 15, 2017 12:34 pm

Hello everyone.

I would like to reduce my acceleration and jerk to a minimum to get the best quality possible, what are your recommended minimum settings?

Can some one also provide me with the gcode lines for the starting script for acceleration and jerk?

thanks so much!

horst.w
Posts: 584
Joined: Fri Oct 17, 2014 4:00 pm

Re: best acceleration and jerk starting scripts

Sat Dec 16, 2017 3:06 pm

In Marlin it looks like this:

*/
#define DEFAULT_MAX_ACCELERATION { 500, 500, 3, 5000 } <- max beschleunigung per achse

/**
* Default Acceleration (change/s) change = mm/s
* Override with M204
*
* M204 P Acceleration
* M204 R Retract Acceleration
* M204 T Travel Acceleration
*/
#define DEFAULT_ACCELERATION
1000 // X, Y, Z and E acceleration for printing moves <- standart beschleunigung
#define DEFAULT_RETRACT_ACCELERATION 1500 // E acceleration for retracts
#define DEFAULT_TRAVEL_ACCELERATION 2000 // X, Y, Z acceleration for travel (non printing) moves <- beschleunigung für nicht druck wege

/**
* Default Jerk (mm/s) <- Jerk ist der maximale Geschwindigkeitsunterschied, der ohne Beschleunigung ausgeführt werden kann.
* Override with M205 X Y Z E
*
* "Jerk" specifies the minimum speed change that requires acceleration.
* When changing speed and direction, if the difference is less than the
* value set here, it may happen instantaneously.
*/
#define DEFAULT_XJERK 4.0
#define DEFAULT_YJERK 4.0
#define DEFAULT_ZJERK 0.2
#define DEFAULT_EJERK 5.0


To switch use the M-Commands, but the values are depending from your printers model - you must try it out.

The commands you can include to the beginning of the start scipt.
For more informations have a look to RepRap-Forum.org >>> M-Codes, G-Codes >>> http://reprap.org/wiki/G-code

Regards
horst.w
GER

psdesign2018
Posts: 3
Joined: Fri Dec 15, 2017 12:24 pm

Re: best acceleration and jerk starting scripts

Sat Dec 16, 2017 3:10 pm

Thank you I was asking as starting script in simplify 3-D, not in Marlon, I don’t want to flash my firmware, I would rather just add a starting and ending script in simplify 3-D. Do you mind providing me with the Scripps?

rrdavis
Posts: 418
Joined: Sat Dec 09, 2017 4:52 am

Re: best acceleration and jerk starting scripts

Sun Dec 17, 2017 5:43 am

Use the link already posted above:
http://reprap.org/wiki/G-code

It tells you which commands to use to set acceleration, jerk, etc. Then just add those to your starting script.

blackbird2016
Posts: 66
Joined: Wed Aug 02, 2017 12:24 am

Re: best acceleration and jerk starting scripts

Mon Dec 18, 2017 1:40 am

psdesign2018 wrote:Thank you I was asking as starting script in simplify 3-D, not in Marlon, I don’t want to flash my firmware, I would rather just add a starting and ending script in simplify 3-D. Do you mind providing me with the Scripps?
{REPLACE "; outer perimeter\n" "; outer perimeter\nM204 S600\n"}
{REPLACE "; inner perimeter\n" "; inner perimeter\nM204 S1200\n"}
{REPLACE "; solid layer\n" "; solid layer\nM204 S1000\n"}
{REPLACE "; infill\n" "; infill\nM204 S2000\n"}

Put that in the post script field of S3D

psdesign2018
Posts: 3
Joined: Fri Dec 15, 2017 12:24 pm

Re: best acceleration and jerk starting scripts

Mon Dec 18, 2017 3:33 pm

Hello, thank you.

You want me to put it in the post script field?

where is this?

I see Starting Script, Layer Change Script, Retraction Script, Tool Change Script and Ending Script/


Or do you want me to put this in Starting Script in lower box that says Additional Terminal Command for post processing?


is this both acceleration and jerk maximum limitations?

thanks

blackbird2016
Posts: 66
Joined: Wed Aug 02, 2017 12:24 am

Re: best acceleration and jerk starting scripts

Mon Dec 18, 2017 3:37 pm

Post processing. Yes sorry.
It is about acceleration which in my opinion is the same as jerk.

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