5 Axis ParPort Stepper Setup with RTCP

You Sir,

Very true, i studied and studied last time also. but now i found solution to 4th axis head router is to configure all 5 axis as per sample and leave c axis 0 from cam processor and thats it. but now i am curious that what is difference in Old Kinematics and new kinematics as seen in my previous post with screenshot and red marking i am noob to understand. can you help me ?

thanks
Ankit

Hello Andy
Update : Everything working good except one thing. Is when I command head to move forward or reverse. It completes motion overshoots and comes back to position especially at higher feed. When feed is low there jump but not measurable it requires one program to test on workpiece. Can you explain what m I missing here

Second thing is I want to use G38.2 to adopt tool length difference in W tool offset. I am tired of fiddling with. But this command seems useless for tool height touch sensor. When I command w axis to move forward to touch probe. It touches and stops motion. But getting values in opposite
For example I have command w to move -100 it finished touch at -80 now if I add -80 in tool offset its wrong because it's 100-80=20 so how to add this subtract function? And thing is I need to be at specific Z co-ordinate as a start point for probe move. Or else pivot distance will not be calculated. Now I am pulling my hairs.

Pardon my English

Any help ?

Thanks
Ankit

marq_torque wrote: Hello Andy
Update : Everything working good except one thing. Is when I command head to move forward or reverse. It completes motion overshoots and comes back to position especially at higher feed.

I think I recognise this problem.
I think that you get this when [TRAJ]DEFAULT_ACCELERATION is not set
linuxcnc.org/docs/2.7/html/config/ini-config.html#_traj_section

Though it could also be bad PID tuning.

Thanks Andy,

Thing is i am running Pulse Sign Configuration so PID Tuning in EMC make any difference ?
second, i read this

"DEFAULT_ACCELERATION = 2.0 - In machines with nontrivial kinematics, the acceleration used for "teleop" (Cartesian space) jogs, in machine units per second per second. "

So isn't it effective for jog move only ? While in my setup jog move it does same as MDI command.

Any help regarding tool offset ? I have Er25 Collet dircet drive spindle so changing all time tools. not the holder so i cant measure tool length all time.


Ankit

marq_torque wrote: Thing is i am running Pulse Sign Configuration so PID Tuning in EMC make any difference ?

Some stepper systems use PID. PnCConf sets up Mesa steppers with a PID because it works a bit better.

"DEFAULT_ACCELERATION = 2.0 - In machines with nontrivial kinematics, the acceleration used for "teleop" (Cartesian space) jogs, in machine units per second per second. "
So isn't it effective for jog move only ? While in my setup jog move it does same as MDI command.

Surely it is worth testing the change at least? It takes moments.

Any help regarding tool offset ? I have Er25 Collet dircet drive spindle so changing all time tools. not the holder so i cant measure tool length all time.

forum.linuxcnc.org/10-advanced-configura...-off?start=90#103477

Thank You Andy,

It was Mistake to disable step gen fb line in hal file. So I was getting swinging movement. It's solved now

Now I am stuck at tool Length offset and tool height sensor. And M code.

I tried g38.2 it ends movement as soon as it touches the sensor. But not retracting and not slowly reversing to cutoff the signal.
Also how to get tool length offset in tool table from DRO ? Is there any reference to start from ?
And all after that .. is it possible to shoot just one m code to perform all this ?

Regards
Ankit