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  • royka
  • royka
21 Nov 2024 15:21
Replied by royka on topic Real-Time Kernel with Orange Pi 4 LTS

Real-Time Kernel with Orange Pi 4 LTS

Category: General LinuxCNC Questions

You can try this rt kernel for the rk3399:
drive.google.com/drive/folders/12VfNmKC3...feCnnzYX?usp=sharing

For the spi rt patch I'll see if I'm able to do something. For sure it won't be as complete as the "original" patch but maybe it'll be good enough.
Have you already been able to use the spidev driver at all?
  • PCW
  • PCW's Avatar
21 Nov 2024 14:32

Help: configure a Servo motor with (PUL/DIR) as a Spindle by Par-port stepconfig

Category: StepConf Wizard

A couple of things:

You should use reset mode for all axis/spindle
this should double you maximum step rate

Can you post your current hal/ini files?
  • Masiwood123
  • Masiwood123's Avatar
21 Nov 2024 13:34 - 21 Nov 2024 13:40

Help: How to run X and A axis with different feed rates simultaneously?

Category: G&M Codes

maybe it seems need looking for a more complex path , because in the second cycle the diameter of the cylinder already changes for the thickness of the material being rolled (inversely proportional to the thread cutting on the lathe), another possible problem is the material itself, because in theory, A axis or S must make one revolution to move the linear axis for one stepover (material thickness), but as in practice material deviation occurs, I am very skeptical that they can guess the speeds. I used deskproto'' to export gcode for 4 axes with the path ``continues rotary'', where it has the basis of the speed of the linear axis and the stepover, as well as the diameter of the workpiece, so it calculates the speed of the A axis. but this is a hard material and then it is an accurate measure..www.youtube.com/shorts/OOtRMBdZchk
  • GeckoWorks
  • GeckoWorks
21 Nov 2024 13:19
Replied by GeckoWorks on topic Index homing Mesa 7i96s

Index homing Mesa 7i96s

Category: PnCConf Wizard

Yes, this firmware should work (though would need to be modified to add the fourth axis index input)

Great, thanks.
4th is in the future, no need for it for a while:)

 
  • sk_linuxcnc
  • sk_linuxcnc
21 Nov 2024 10:28

Help: How to run X and A axis with different feed rates simultaneously?

Category: G&M Codes

Yes i think that is the way to go. but I am curious to find out if it is also possible to do it while configured as an A Axis?

secondly, i have a parallel thread on going the discussion of a spindle, where i am not able to attain the max rotational speed when my motor is configured as a spindle compared to as an A axis (where i get more rpm).

forum.linuxcnc.org/16-stepconf-wizard/54...-par-port-stepconfig

help is much appreciated :)
  • Aciera
  • Aciera's Avatar
21 Nov 2024 10:22

Help: How to run X and A axis with different feed rates simultaneously?

Category: G&M Codes

Sounds like you should maybe run it as a spindle instead of axis A.
  • sk_linuxcnc
  • sk_linuxcnc
21 Nov 2024 09:48

Help: How to run X and A axis with different feed rates simultaneously?

Category: G&M Codes

yes, to match the feedrates when two axis are called simultaneously within a single line of code, the gcode calculates a compound feedrate, with the X axis as master, and the A axis as slave. so basically the X axis dictates how fast the A axis would rotate. i do not want this.

i want the A axis to be rotating continously at a given feedrate.
and X to perform back and forth motion (based on the material width that i have, so that i can acheive a side-by-side layup of the material) the material parameters are mentioned on the above reply of mine.
  • sk_linuxcnc
  • sk_linuxcnc
21 Nov 2024 09:43

Help: How to run X and A axis with different feed rates simultaneously?

Category: G&M Codes

diameter of the mandrel = 100mm
length of the tube to be wound = 300mm
material speed (to be wound per second) = 100mm/s
material width = 6.35mm
material thickness = 0.14mm (lets ignore it at the moment for a simple program)
requirement = side-by-side layup of material without any gaps and overlaps
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