Re: [Emc-users] 2.7.0, new trajectory planner, lost it's perfect pitch

Thanks Jeff, I loaded it up in a 4-axis sim config. I think my initial idea is wrong about ARC_BLEND_RAMP_FREQ, since all of the blending happens between 4 axes (parabolic blends only). Just for fun, here's both clips together:

Re: [Emc-users] 2.7.0, new trajectory planner, lost it's perfect pitch

Rob, My file was a bit modified from the default. But I think the reason for the change in speed in 2.7 is that G64 is selected (by default?) and so rather than play out to the ends of the timing values it blends to the next move and a) runs faster, and b) sounds different as it swoops into

Re: [Emc-users] 2.7.0, new trajectory planner, lost it's perfect pitch

Tom, have you tried playing with the ARC_BLEND_RAMP_FREQ parameter in your ini file? Increasing it from the default value of 20Hz up to 100Hz or even 1000Hz will make the trajectory planner more aggressive on short segments, at the expense of more acceleration ripple for programs with lots of

Re: [Emc-users] 2.7.0, new trajectory planner, lost it's perfect pitch

I will give that a try Rob, I don’t think it is in my ini file at all IIRC. My acceleration on the Z axis was set quite low so I brought that up to something reasonable today and it helped. Though again, it is a direct comparison as those have been my settings under the previous (2.4-2.6)

Re: [Emc-users] 2.7.0, new trajectory planner, lost it's perfect pitch

On Mon, Oct 19, 2015 at 11:30:14PM +, Robert Ellenberg wrote: > would you mind sharing the g-code so I can > take a look at the slow spots? A version of this program is in the sample nc_files as "daisy.ngc". It needs to be modified to run on a 3-axis machine, and only "sounds good" on a

[Emc-users] 2.7.0, new trajectory planner, lost it's perfect pitch

I’m just sayin’... New: https://youtu.be/JKNieuI6Hmo Old: https://youtu.be/S0re79zEX5A :-) -Tom ps: Here is You Are My Sunshine. I don’t have it playing on the 2.6 but definitely sounded better before: https://youtu.be/e1wu2cMpmMY

Re: [Emc-users] 2.7.0, new trajectory planner, lost it's perfect pitch

I'm hearing you. :) Sounds like the new planner has a lower acceleration rates so you don't get the good attack on pitch that sounds more musical. It's like using a slow slide whistle or trombone. Maybe increasing the acceleration rates might fix this critical issue. jerry On Sat, Oct 17, 2015