[ODE] Feedback for joint motors

Jaroslav Sinecky jsinecky at tiscali.cz
Wed Oct 5 16:07:15 MST 2005


Ok, I misunderstood, you're right, it's impossible to get motor force alone,
you have to use separate amotor joint.

> -----Original Message-----
> From: Peter Kyme [mailto:pk at dneg.com]
> Sent: Wednesday, October 05, 2005 3:47 PM
> To: Jaroslav Sinecky
> Cc: ode at q12.org
> Subject: Re: [ODE] Feedback for joint motors
>
>
> Hi,
>
> thanks for your thoughts. If I understand you correctly the force
> feedback for the dxJointLimitMotor is included with the feedback for
> parent joint. However I need the forces specifically applied by the
> motor, which I guess it not possible (as it stands).
>
> Jaroslav Sinecky wrote:
> > Hi,
> > just from quick look at the code I think the feedback should work for
> > motored joint same as for any other. The effect of
> dxJointLimitMotor is all
> > included in jointGetInfo2 and hence in the Jacobian. But I
> can't speek from
> > my experience.
> > Try using dWorldStep if you get strange feedback values using QuickStep,
> > maybe you'll need a joint feedback patch.
> > Let me know if it helps.
> >
> > Jaroslav
> >
> >
> >>-----Original Message-----
> >>From: ode-bounces at q12.org [mailto:ode-bounces at q12.org]On Behalf
> >>Of Peter Kyme
> >>Sent: Sunday, October 02, 2005 6:20 PM
> >>To: ode at q12.org
> >>Subject: [ODE] Feedback for joint motors
> >>
> >>
> >>Am I correct in understanding that it is not currently possible to get
> >>feedback for joint motors unless you create a separate angular motor as
> >>a replacement for the dxJointLimitMotor structs included with
> most joints?
> >>
> >>I need the forces applied by the motor to implement static friction in
> >>hinges/universal joints.
> >>
> >>Thanks,
> >>
> >>Peter
> >>_______________________________________________
> >>ODE mailing list
> >>ODE at q12.org
> >>http://q12.org/mailman/listinfo/ode
> >
> >
> >



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