Dynomotion

Group: DynoMotion Message: 9689 From: andysontag Date: 6/24/2014
Subject: Plans for integrating Jerk while running Gcode?

Hi Tom,


I'm reading up on tuning closed loop stepper systems in preparation of tuning our machine and it appears that Jerk should allow for higher performance if done correctly. It also appears that in kmotion/kflop Jerk is only used when running C code or G0 rapids instead of for all movement. Is there a reason why you wouldn't want to use Jerk while running gcode or do you have plans to integrate Jerk into normal operation?


Andy
Group: DynoMotion Message: 9690 From: Tom Kerekes Date: 6/24/2014
Subject: Re: Plans for integrating Jerk while running Gcode?
Hi Andy,

No reason except that it is extremely complex and we don't know how to do it :}

We do have a low pass filter that does provide some degree of Jerk limiting.  See:

http://www.dynomotion.com/Help/KMotionCNC/TrajectoryPlanner.htm

Regards
TK

From: "andysontag@... [DynoMotion]" <DynoMotion@yahoogroups.com>
To: DynoMotion@yahoogroups.com
Sent: Tuesday, June 24, 2014 9:18 AM
Subject: [DynoMotion] Plans for integrating Jerk while running Gcode?

 
Hi Tom,

I'm reading up on tuning closed loop stepper systems in preparation of tuning our machine and it appears that Jerk should allow for higher performance if done correctly. It also appears that in kmotion/kflop Jerk is only used when running C code or G0 rapids instead of for all movement. Is there a reason why you wouldn't want to use Jerk while running gcode or do you have plans to integrate Jerk into normal operation?

Andy
Group: DynoMotion Message: 9691 From: andysontag Date: 6/24/2014
Subject: Re: Plans for integrating Jerk while running Gcode?
I see, that is certainly a good reason :-)

Andy