Having joint following error on 5axiskins

Hello to all,

I'm very new to 5 axis kinematics and trying to using 5axiskins in my machine.

I have a machine like XYZBC 5 axis bridge mill.

I'm attaching my ini and hal files.

I construct my emc2 with trivkins and adjust all parameters for machine which works succesfully.

But when I switched to 5axiskins I have joint following errors.

Can any body help me?

Note: In the configuration files I'm using 6 axis for simulation with the 5axisgui

Hm, looks like you are missing the [KINS] section in the INI. From the sim/axis/vismac/5axis/bridgemill/5axis.ini:

[KINS]
KINEMATICS = 5axiskins
JOINTS = 6

Note that 5axiskins does not handle an A axis.

You might want to update to Version 2.8 or even the switchkins-branch to be able to switch from tivialkinematics to 5axis-TCP.
www.panix.com/~dgarrett/stuff/switchkins.html
www.panix.com/~dgarrett/stuff/s_kins_guide.txt

Also regarding bridgemill:
forum.linuxcnc.org/10-advanced-configura...is-kinematics#186285

Sorry for my late reply. I was trying to solve myself to learn much more but I'm unsuccesful.

I'm using emc 2.7.14.

Do I have to update my version ?

By the way, I only need X,Y,Z,B and C axes. My machine is very similar to vismach 5 axis bridgemill

If you are setting up the machine from scratch then I would certainly advise to update your version. I you had the machine running on 2.7 then updating to 2.8 will require some adjustments in the config.

I have installed the debian 10 with emc 2.8 from iso image.

And I have create a new configuration with StepConf Wizard.

But I'm still getting a joint following error.

Here I attached the ini and hal files....

[strike]You don't have any settings for the step generator in your INI. You must have missed something in the pncconf. here is what my ini section for a joint looks like:[/strike]

Excuse me but, I have a little bit confused... You wrote pncconf but I'm using StepConf for parallel port , step-dir controller...

If I'm not wrong pncconf is for mesa boards...

my apologies. I'm so used to the mesa boards I totally got on the wrong track. For StepConf that is of course the output you would get.

So none of the motors work? You get a "following error" as soon as you try to jog an axis?

Maybe try to reduce the acceleration and velocity:

[JOINT_0]
TYPE = LINEAR
MAX_VELOCITY = 50
MAX_ACCELERATION = 200
MIN_LIMIT = -500
MAX_LIMIT = 500
HOME_SEARCH_VEL = 0
HOME_SEQUENCE = 0
SCALE = 59.59183673469
STEPGEN_MAXACCEL = 250


[edit]
MAX_VELOCITY is in mm per second so 500 maybe a bit excessive.

I can jog all 5 motors without any problem...
I can run a ngc file with %10 rapid override...

If I decrease the max_velocity to 50, the machine moves very slow....

But on the other hand, If I changed the kinematics from 5axiskins to trivkins with the same configuration, I got no joint following error...

Ok, I think I'm don't understand your problem correctly:
You can jog alll axis and run gcode with 10% feed override, no problem.

So are you getting the following errors when you jog axis with 5axiskins or run a gcode file in 5axis kins ?

Note that for 5axis simultaneous movements you will have to reduce your acceleration considerably (compared to trivial kinematics).