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  • kanesl
  • kanesl
Today 11:59
Replied by kanesl on topic Kinematic model for a 5axis mill with universal (nutating) head

Kinematic model for a 5axis mill with universal (nutating) head

Category: Show Your Stuff

Hello, I've encountered a similar problem. Where can I find an example of a milling machine with switchable soft limits?
  • kanesl
  • kanesl
Today 11:33
The machine tool coordinate system shifts before and after RTCP is turned on was created by kanesl

The machine tool coordinate system shifts before and after RTCP is turned on

Category: General LinuxCNC Questions

Hello everyone, I'm a DIY enthusiast. My English isn't great, but I'll try my best to explain clearly. I'm encountering a problem while using LinuxCNC as the operating system for my machine tool. When I replace the existing kinematics system with my own custom-built five-axis kinematics system, the machine tool coordinate values ​​change when I switch to RTCP mode at the current position, causing a system alarm because the machine tool coordinate system has exceeded its limits. My understanding is that enabling RTCP changes the workpiece coordinate system values, not the machine tool coordinate system values. I haven't been able to solve this problem yet.

Additionally, my machine tool structure is A (head), C (table), with the distance from the C rotation center to the machine tool zero point being (Xrc, Yrc, Zrc). The tool length is set to dt, and there is an offset between the two rotary axes with offset values ​​of (Xos, Yos, Zos).
  • grandixximo
  • grandixximo's Avatar
Today 10:10
Replied by grandixximo on topic Ethercat random jitter fix

Ethercat random jitter fix

Category: EtherCAT

Please share zipped configuration folder, or whatever you are willing to share to shed light on the issue.
  • rodw
  • rodw's Avatar
Today 09:37
Replied by rodw on topic Mini wannabe datron build

Mini wannabe datron build

Category: CNC Machines

I'm not sure on this but I thought there was a change to support 64 bit floats for instanceslike this that managed the wrap but I have no experience. There is a big body of work pending in master branch around 64 bit pins. Message Grandixximo on Discord.
  • ihavenofish
  • ihavenofish
Today 09:09
Replied by ihavenofish on topic Mini wannabe datron build

Mini wannabe datron build

Category: CNC Machines

Alright, the 4th axis joint error inverting is 32 bit count roll over.

I am getting confusing info in my searches, but there seems like there is a hall function to manage this? Anyone have some insight as how you implement it?

thanks!
  • ihavenofish
  • ihavenofish
Today 08:17
Replied by ihavenofish on topic Ethercat random jitter fix

Ethercat random jitter fix

Category: EtherCAT

ok, the joint error is something else. it happens at 912.45 ALWAYS. it must and over run of something. we have like 800 million counts per turn of the axis, so its inverting at 2 billion encoder counts.

Ill put this in my other thread as it i dont think has to do with the ethercat jitter problem.
  • ihavenofish
  • ihavenofish
Today 07:57
Replied by ihavenofish on topic Ethercat random jitter fix

Ethercat random jitter fix

Category: EtherCAT 


can try for now to do

loadrt lcec
...
initf lcec.activate servo-thread
addf lcec.read-all servo-thread


thats already in my hal

I did find something interesting. at least specifically on the 4th. when it give a joint error, the encoder position INVERTS, as does the display. And it STAYS inverted. so ill be jogging at 900 degrees on the A... and then joint error and it become -900 degrees.

I dont know if the other axis joint errors are also inverting, i cant "see" them yet. If they are they are returning back to position the next frame. The rotary axis for some reason doesn't return, it just flips sign.
  • ihavenofish
  • ihavenofish
Today 07:51
Replied by ihavenofish on topic Mini wannabe datron build

Mini wannabe datron build

Category: CNC Machines

thanks, ill look it all over in the morning.
  • rodw
  • rodw's Avatar
Today 07:07
Replied by rodw on topic jerking on zero position

jerking on zero position

Category: Forum Questions

i am controlling drive by using modbus 485, my controller is teensy 4.1 with wavetec RS485 module between drive and controller. the drive is being controlled in PR/velocity mode.. the PR mode is being used for homing and velocity for normal 360 degree rotations. i am facing issue in the end when the arm reaches to zero/home position.
 

Update your machine to use LinuxCNC and we might be able to help.
  • rodw
  • rodw's Avatar
Today 07:04
Replied by rodw on topic Mini wannabe datron build

Mini wannabe datron build

Category: CNC Machines

4th axis!



So, in redoing linuxcnc and adding this new leadshine L6 servo, ethercat is not totally ferked. I am getting random limit and joint errors during program runs, during jogging, sitting idle. I managed to see one of these errors with the scope and it is a one frame spike of ferror that's seemingly infinite value.

What the heck is going on. Ill upload my config files shortly. Every camera cut in the video is a random joint error on a random axis.

I have the jitter fix build, and not a whooole lot else really changed from the last build. HALP! :)

there have been big changes.
forum.linuxcnc.org/ethercat/45336-etherc...-how-to-step-by-step
follow the updated process and also the added Hal file command mentioned in response to your other post
 
  • rodw
  • rodw's Avatar
Today 07:01
Replied by rodw on topic Ethercat random jitter fix

Ethercat random jitter fix

Category: EtherCAT

Also the Ethercat repos have changed to point to linuxcnc-ethercat
The instructions in my Ethercat sticky have been updated so also follow them
2.9.10 ISO should install the new repos mentioned but follow the  instructions in step 2
forum.linuxcnc.org/ethercat/45336-etherc...-how-to-step-by-step
 
  • rodw
  • rodw's Avatar
Today 06:57
Replied by rodw on topic Ethercat random jitter fix

Ethercat random jitter fix

Category: EtherCAT

So i installed this on a redone setup of 2.9.8 and im getting constant random joint and limit errors. even mid program. they seem to stem from random spike encoder frames. sometimes it goes 10 mins without anything, sometimes you can move for 1 second without one.

I am not 100% sure they are related to this patch, or what this patch is meant to fix. But its rendered my machine pretty unusable. (i redid the machine to add a 4th axis)

Any thoughts?

From a message from grandixximo
can try for now to do

loadrt lcec
...
initf lcec.activate servo-thread
addf lcec.read-all servo-thread
  • Aciera
  • Aciera's Avatar
Today 06:16
Replied by Aciera on topic Gmoccapy tool table not accepting lathe tool angles...

Gmoccapy tool table not accepting lathe tool angles...

Category: Gmoccapy

just need to search for 'locale.format_string()' and replacing each instance back with 'locale.format()'?


No, the other way around.
Click on the link in my post above and you will see the files 'calculatorwidget.py', 'offsetpage_widget.py' and 'tooledit_widget.py'. The lines marked in red need to be replaced with the lines marked in green. You will see the line number on the left.

'pncconf.py' is also affected but that is not required for running Gmoccapy.
  • ihavenofish
  • ihavenofish
Today 06:10
Replied by ihavenofish on topic Ethercat random jitter fix

Ethercat random jitter fix

Category: EtherCAT

So i installed this on a redone setup of 2.9.8 and im getting constant random joint and limit errors. even mid program. they seem to stem from random spike encoder frames. sometimes it goes 10 mins without anything, sometimes you can move for 1 second without one.

I am not 100% sure they are related to this patch, or what this patch is meant to fix. But its rendered my machine pretty unusable. (i redid the machine to add a 4th axis)

Any thoughts?
  • ihavenofish
  • ihavenofish
Today 05:59
Replied by ihavenofish on topic Mini wannabe datron build

Mini wannabe datron build

Category: CNC Machines

4th axis!



So, in redoing linuxcnc and adding this new leadshine L6 servo, ethercat is not totally ferked. I am getting random limit and joint errors during program runs, during jogging, sitting idle. I managed to see one of these errors with the scope and it is a one frame spike of ferror that's seemingly infinite value.

What the heck is going on. Ill upload my config files shortly. Every camera cut in the video is a random joint error on a random axis.

I have the jitter fix build, and not a whooole lot else really changed from the last build. HALP! :)
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