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  • Kieran
  • Kieran
09 Jun 2025 03:44
Replied by Kieran on topic weird behavior: homing X messes up Y

weird behavior: homing X messes up Y

Category: EtherCAT

Ok, more Q's.... Im messing with PDO now. i ran ethercat pdos

Warning: Spoiler!


heres my working XML snippet

Warning: Spoiler!



question is, why doesnt it work anymore if i switch from  <pdo idx="1600"> to  <pdo idx="1701"> for example. why is it using 1600 and 1A00 and working even though "ethercat pdos" spits out 1701 and 1Bo1? I want to use something other than 1600/1A00 because they only have a few PDOs available on my servos. they are "variable PDO" according to the manual. Just trying to understand how this all works.
  • unknown
  • unknown
09 Jun 2025 03:26
I've got a problem was created by unknown

I've got a problem

Category: Off Topic and Test Posts

Ok I got a real issue with a forum member and the posts he makes.
Most of the time it's not quite right, other times I feel if other users follow his advice it's going to cost them money, time or absolute worst case possible injury.

What do I do ?
Ignore him
Report him
or something else ?
  • unknown
  • unknown
09 Jun 2025 03:22
Replied by unknown on topic Flyback diode mesa 7i95t

Flyback diode mesa 7i95t

Category: Driver Boards

Using the 12v rail from your PC negates the protection the optos are used for.

I suggest to forget all the BS you've learnt from the Hipster Maker crowd and read & learn by someone that knows his stuff.

This is a good start, written by the guy that designed the TEC-1 sbc back in '83 or '84:
www.talkingelectronics.com/te_interactive_index.html
  • unknown
  • unknown
09 Jun 2025 03:14 - 09 Jun 2025 03:16
Replied by unknown on topic linuxcnc c++ axis gui works!

linuxcnc c++ axis gui works!

Category: General LinuxCNC Questions

Ok we get you don't get Python, they are just libraries, not dependencies, the same as you need libs for C & C++ and other things.

WTF you're dragging up a thread that's over 12 months old and repeating your opinions regarding Python & Java & not adding adding that is of relevance, every time you post it has nothing of importance or relevance.

Yeah I get the irony, but (insert vulgar speech here) you're such a (insert vulgar speech here) waste of space.
  • ring
  • ring
09 Jun 2025 02:19
Five-Axis RTCP Features: G43.4 and G43.5 Equivalents in LinuxCNC was created by ring

Five-Axis RTCP Features: G43.4 and G43.5 Equivalents in LinuxCNC

Category: G&M Codes

Hello everyone,I am a new LinuxCNC user and developer. This time, I would like to use LinuxCNC in combination with my cutting simulation process. I have encountered some problems and would like to know if there are any known solutions in LinuxCNC. If not, I am interested in developing features similar to G43.4 and G43.5.Before we get into the details, let me provide some context. I am running LinuxCNC 2.9.4 on Debian 12 with PREEMPT_RT. Please note that for my simulation process, real-time (RT) capability is not a strict requirement. My simulation uses the configuration from 
configs/sim/axis/vismach/5axis/table-dual-rotary/xyzab-tdr.ini
, which matches the machine type I need.Here is my understanding of the five-axis xyzab-tdr support:
The key is the toolpath (TP) transformation. Five-axis machines are different because they require transforming the workspace coordinates to real joint positions, which involves both forward and inverse kinematics. The xyzab-tdr configuration provides these transformations. The main parameters for these transformations are seven in total: 
tool-offset
, 
x-offset
, 
y-offset
, 
z-offset
, 
x-rot-point
, 
y-rot-point
, and 
z-rot-point
. The 
x-offset
, 
y-offset
, 
z-offset
, 
x-rot-point
, 
y-rot-point
, and 
z-rot-point
 define the machine’s geometry, while 
tool-offset
 functions similarly to Fanuc's G43.4 RTCP (Rotating Tool Center Point) tool compensation.In RTCP, G-code is typically provided in two forms:Fanuc-like:
G43.4 T1
G01 X107.10843 Y-258.10506 Z16.72037 A-82.485727 B-2.152027
G49
G43.5 T1
G01 X118.38752 Y-257.36350 Z-13.21382 I=-0.087062004 J=-0.995672089 K=-0.032516115
G01



Siemens-like:
TRAORI(1)
N23 X131.06394 Y-257.06181 Z-28.17010 A3=-.088284415 B3=-.990423696 C3=-.106145012
TRAFOOF
My questions are:

    

  1. In Fanuc, G43.4 is modal. Does LinuxCNC use the TP transformation as a modal mode as well? In other words, when using five-axis TP, is G43 equivalent to G43.4 in LinuxCNC?
    2. 

  2. The IJK parameters are used for Freeform Surface toolpaths. Does the G-code parser in LinuxCNC support IJK-style input?
    3. 


Thank you in advance for your help and insights!			

		

	




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