2011/11/18 Francesca Sca <fancy_...@yahoo.it>:
>
> I have the version 2.4.6. This could be a problem with that command? However 
> the command is
>
> M67 E Q . You can me explain better what are E and Q?

http://www.linuxcnc.org/docview/html/gcode_main.html#sec:M67-Analog-Output

> You mean that for example if I want to exclude the axis C from genserkins I 
> should change this line:
>
> world->c = rpy.y * 180 / PM_PI     to         world->u = rpy.y * 180 / PM_PI 
> ( and so for every line where C appears!)
>
> In this way genserkins calculates the kinematics using the axis U and not C. 
> Am I right? With this change Could I control C separatly from kinematics?

The formula suggests that it is a rotation angle, which I do not think
is what the gripper fingers do.
RPY are meant to be roll-pitch-yaw angles, which are very close to Euler angles:
http://en.wikipedia.org/wiki/Euler_angles

IMHO Substituting C with U will screw it up. If You really want to do
it in kinematics rather than HAL, then adding trivial kinematics for U
(and also V and W), with these lines, where appropriate (inverse and
forward kins), should be easier:
world->u = joints[6]
joints[6] = world->u

Viesturs

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