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  • Lcvette
  • Lcvette's Avatar
12 Mar 2026 16:20
Replied by Lcvette on topic Some problems with probe basic lathe

Some problems with probe basic lathe

Category: QtPyVCP

i just tried using the facing one and it does do things, but i really am not a fan of the setup, i suspect it is incomplete compared to the original macros andy put out. it looked to have several missing inputs. and im not a fan of it running without having a chance to see the output plot for verification. i would say the subs need some work before i would use them personally.
  • Lcvette
  • Lcvette's Avatar
12 Mar 2026 16:14
Replied by Lcvette on topic Some problems with probe basic lathe

Some problems with probe basic lathe

Category: QtPyVCP

did you verify your paths for the subroutines were correct? those look to be correct names to be parsed. it appears you have hardcoded max rpm speed instead of using the ui entry. but other than that the names look to be correct. I would test by copying the subroutine and trying to run it as a program filling in the data as expected and see if you can make it run, may tell you if the subroutines is correctly formatted or not.
  • PCW
  • PCW's Avatar
12 Mar 2026 16:10 - 12 Mar 2026 18:02
Replied by PCW on topic Connect Siggen to Stepgen?

Connect Siggen to Stepgen?

Category: General LinuxCNC Questions

Did you set the stepgen to control mode 1?  (velocity mode)

Is the stepgen enabled?

I use stepgens all the time for encoder and frequency counter testing
so this will work.

Sserial parameters can only be set in the hal file, but this is not true of general
hostmot2 parameters, these can be changed at any time. Even though hostmot2 parameters
can be changed at any time, this may lead to unexpected behaviour as these are typically
used as setup rather than process variables.

Also of you want a step frequency change, you will have so set the stepgen acceleration
to a large number.
  • Atsu
  • Atsu
12 Mar 2026 16:05 - 12 Mar 2026 18:09
Replied by Atsu on topic Ethercat random jitter fix

Ethercat random jitter fix

Category: EtherCAT

I have the same issue as TAKUYA, the dc-phased pin never goes high. I managed to fix this using Claude AI and now the dc-phased pin goes high. I have attached a detailed notes of what was changed in the code as well as some screenshots from before and after.

NOTE: this was done entirely with the help of AI and I am not qualified enough to say whether it is correct or not! Grandixximo, could you please review the notes and share your thoughts? Opening the attached HTML file in a browser, you can view the notes which were generated. It is too long to copy-paste here.

EDIT: After testing the code more thoroughly, I'm getting jitter again. It's very likely that the AI's "fix" only addressed the dc-phased pin but broke something else... I've reverted back to the master branch ( github.com/grandixximo/linuxcnc-ethercat ), and everything is working again except for the dc-phased pin.
  • Lcvette
  • Lcvette's Avatar
12 Mar 2026 16:04
Replied by Lcvette on topic QTPYVCP+VISMACH+LINUXCNC ROLLED INTO ONE?

QTPYVCP+VISMACH+LINUXCNC ROLLED INTO ONE?

Category: QtPyVCP

we are revamping many things in the pyside6 version currently, 2 of the things being worked on is vtk and the gcode plotter. both are seeing some very big changes, so i will add this to the list of things to add some simulation functionality to.
  • Lcvette
  • Lcvette's Avatar
12 Mar 2026 16:03
Replied by Lcvette on topic Add Buttons in Probe Basic

Add Buttons in Probe Basic

Category: QtPyVCP

that's one you will have to sort from others as i have not used one of those usb type if that is what you are referring too. but i think some others have on here so may be some solutions to any issues further down the topics list! good luck and post any issues or solutions you find for others please!
  • Lcvette
  • Lcvette's Avatar
12 Mar 2026 16:01
Replied by Lcvette on topic Probe Basic DRO display appears blank

Probe Basic DRO display appears blank

Category: QtPyVCP

glad your resolved!
  • Todd Zuercher
  • Todd Zuercher's Avatar
12 Mar 2026 15:37
Connect Siggen to Stepgen? was created by Todd Zuercher

Connect Siggen to Stepgen?

Category: General LinuxCNC Questions

I am working at tuning some older digital (step/dir command) servos, that don't have any auto tuning capabilities.  In order to avoid needing to use an  oscillo scope I would like to be able to connect a square wave siggen signal to the velocity command input of an unused stepgen on a 7i76eu (I also have a 5i85 for encoder feedback.)  I loaded the siggen, and made the hal connections, set all the parameters and enabled everything from halshow.  I can see the input for the stepgen's velocity-cmd changing, but I don't think any steps are being generated (no changes of any of the stepgen's count or feedback pins.  

Where am I going wrong?  Is this another situation where changes to parameter pins are only effective in a hal file at startup?

I was hoping to just create a little hal file that I can load manually after Linuxcnc was running to set tuning parameters then plug one of the drives step/dir plugs into the testing plug to run the tuning (moving them back to their regular position when running.)
  • TAKUYA
  • TAKUYA
12 Mar 2026 15:17
Replied by TAKUYA on topic Ethercat random jitter fix

Ethercat random jitter fix

Category: EtherCAT

Ah okay gotcha.

Ill plot the mentioned signals this weekend when im back at the machine.
Latency on my host is ~20k with max jitter when opening mulitple tabs max 45k

would lowering/increasing the SyncCycles value help with this?
  • Mbrand1901
  • Mbrand1901
12 Mar 2026 15:14
Replied by Mbrand1901 on topic Retrofitting Deckel FP4ATC

Retrofitting Deckel FP4ATC

Category: Milling Machines

Hello everyone!
I am currently connecting my two 7i84U and my 7i74 to my 7i97T. 
But i have a few problems with it. 
Can someone please send me the right firmware for that config? I have tried a few and it wouldnt work. Also the encoders stopped working after the new firmeware. Does anyone have a solution for that? The 7i74 and the 7i84U has power. And the leds work.
  • DerKlotz
  • DerKlotz
12 Mar 2026 09:03
  • masawee
  • masawee
12 Mar 2026 08:10 - 12 Mar 2026 08:11
Replied by masawee on topic Trying out LinuxCNC on Raspberry PI5

Trying out LinuxCNC on Raspberry PI5

Category: General LinuxCNC Questions

but normal need use WHITOUT this expensive hat , only gpio pin out and shift level converter can use 3,3V gpio pin to out 5V and traight to driver step and dir and enable pin.
how this made if ewer newer not has understand anything code nd not understand what need doing code, understand only good all hardware how connect and build,
i have rpi4 and SD card have linuxcnc rpi4 image, working and boot ok, (whit HDMI display) but not boot whit pi hut mikro HDMI to vga cable.
how make this gpio pins can take out gpio pin to driver DM556. were can download setting hal and ini file or what need add to rpi4, normal peoples NOT can understand and write hard code to rpi, hal or ini or what possiple need doing, not know.
i just buy rpi4, paraller port BOB, cheap chinese 10$ board, encoder, rotary SW, shift level converter modules, 3,3V to 5V, all buttons, DM556 drivers, nema 23 470 OZ/3Nm motors, lot hardware but not can made code anything.

help need send to me files what need copy and paste to rpi4 linuxcnc and were folder need add. not know were and what and how.
  • grandixximo
  • grandixximo's Avatar
12 Mar 2026 01:54 - 12 Mar 2026 02:01
Replied by grandixximo on topic LinuxCNC S-Curve Accelerations

LinuxCNC S-Curve Accelerations

Category: General LinuxCNC Questions

hey guys

just wondering whats the latest on this.

cheers

andrew

 


Still work in progress

github.com/LinuxCNC/linuxcnc/pull/3807

you can read above, if anyone wants to test what's done so far, they can download the debs from github build artifacts
github.com/LinuxCNC/linuxcnc/actions/runs/22982518117?pr=3807
the above is today's build, scroll to the end of the page for the debs for the different systems, I think I got it to the point where it is in a good enough state for sim testing by the community
To test it set planner type 2, I have included a zip file in this post with my testing settings for planner type 2.
YangYang is refactoring the code, he put planner type 1 on pause because there are certain limitations with TP1 implementation, he cannot reach high speed on short segments.
TP2 will be the general base idea, but much needs to be refactored, the feed override needs to be reworked, kinematics TP and RT servo-thread need to be reworked, there is talk in the github about this, any extra mind is appreciated.
At the moment TP2 generally works, what's still missing from my implementation is spindle sync, I never tested probing or adaptive-feed.
as far as running gcodes and MDI, I believe everything works, but it is far from hardened, it is just me doing testing in a sim, if you put it on your machine, it is at your own risk, play with it in the sim, and let me know how it goes, here, in the gihub PR, or even on my github fork.
  • grandixximo
  • grandixximo's Avatar
12 Mar 2026 01:40 - 12 Mar 2026 01:42
Replied by grandixximo on topic Ethercat random jitter fix

Ethercat random jitter fix

Category: EtherCAT

They are same

github.com/grandixximo/linuxcnc-ethercat

this just has one small optimization

dc-phased is latency dependent, can you plot in halscope, app-phase, pll-error, and servo thread?
  • tommylight
  • tommylight's Avatar
12 Mar 2026 00:14
Replied by tommylight on topic MPG Pendant

MPG Pendant

Category: Computers and Hardware

No.
USB pendant goes to USB on PC, not to Mesa.
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