can not reach the desired speed

[Arminas]

Hi all,

I think I'm missing something, but I don't know what. I can not reach 150 mm/s speed in a distance of 5 mm, XY acceleration 12000 mm/ss, jerk 600 mm/min, maximum speed is set to 30000 mm/min. Extruder settings are accel 10000 mm/ss, 7200 mm/min jerk, maximum speed is 10800 mm/min. What else could be limiting the speed?

[gloomyandy]

@Arminas How are you testing to see if you reach the target speed over that distance?

[droftarts]

@Arminas How are you seeing what speed is reached in a 5mm move? I can't get DWC to show requested and top speed for a one-off move less than 50mm, and my accelerations are a lot lower than yours!

Is this on a Cartesian or CoreXY machine? Moves that are just X or Y, and those that are X AND Y, show different expected/actual speeds in DWC. Also check that speed is not limited by any M204 setting (slicers have a bad habit of putting these in, reducing all your print speeds) - send M204 to see how it is currently set.

Ian

[Arminas]

@droftarts @gloomyandy I assume that DWC shows it correctly it's in both X or Y, X and Y directions. It's CoreXY. Okay, M204 shows Maximum printing acceleration 1250.0, maximum travel acceleration 1250.0 mm/sec^2 ...... How can I solve this? I am using S3D slicer.

[Arminas]

This post is deleted!

[Arminas]

@droftarts Okay, so M204 command in config does not help, M204 command in S3D start script does not help. What do I have to do to make my acceleration and maximum speed as it is in my config?

[droftarts]

@Arminas M204 will be in the Gcode that the Slicer produces, and will override the acceleration settings in config.g. You need to remove it from the generated Gcode. I don't know how to stop that in S3D, but in other slicers it is usually set as an option in the 'start gcode'.

Ian

[Arminas]

@droftarts omg, yes, I found it.... What a dumb mistake. Thank you...