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  • fatih.d
  • fatih.d
20 Oct 2025 16:18

Remora - Rpi Software Stepping Using External Microcontroller via SPI

Category: Computers and Hardware

Hi all, first post.

Could anyone point me to the right direction about using a 446 based board (Fysetc S6) with no SD card slot?

What would be the best, going with static config approach (I don't know how to do it or use which version/fork) or using an SD card adapter and have them talk over SPI? Using SDIO/SDMMC interface would not be so straightforward I guess.

Many thanks to those who made this project real. It was a fun read and I've learned so much. (Not a software guy)
  • JT
  • JT's Avatar
20 Oct 2025 16:14

linuxcnc.command().mdi() vs .program_open()

Category: General LinuxCNC Questions

mdi(string) send an MDI command. Maximum 254 chars

MDI executes the command

program_open(string) open an NGC file

Open loads a file into memory but does not run the file.

JT
  • KTC394
  • KTC394
20 Oct 2025 15:17

Home / Soft Limits - Not homing before moving axis(s)

Category: General LinuxCNC Questions

Yes, you can put home zero at the middle of table, config the x and y size as +100 and -100 if the table is 200 mm. Put a mark on the x and y gentry as zero point. That will save lots of time to home the machine z is always at the top.
  • Hakan
  • Hakan
20 Oct 2025 15:15 - 20 Oct 2025 17:15
Replied by Hakan on topic Ohmic sensing with IPTM-60

Ohmic sensing with IPTM-60

Category: Show Your Stuff

I made a detailed study of the probing.
I didn't quite understand it. Here is a detailed contact.
 
1. Start at the current position
2. Probe down with Z axle's max velocity (4000 mm/min)
3. Probe Height
4. Run with Probe Speed (600 mm/min)
5. Contact (voltage lower than limit). Brake with Z's max acceleration
6. Go up at 1 micrometer / cycle
7. Contact release (voltage higher than limit). This sets the material height.
8. Go up with Z axle's max velocity
9. Pierce height (measured from the new material height)
10. Piercing starts (voltage goes high) after 0.6 secs?.
11. Pierce Delay seconds after Pierce start
12. Go down with Z axle's max velocity
13. Cut Height
14. Cut for 5 mm at cut speed.
15. Arc has stopped. 
16. Go up with Z axle's max velocity
17. Safe Height

The big take-away from this is that the material height is set when the probe goes up.
Focusing on contact criteria is not the right way.
Focus on non-contact criterium.

Also, to reduce the sensing time, one wants to
- have probe height close to the material
- use not very high probing speed, because of the distance before Z can stop
- use insanely high acceleration on Z
one gets punished by the probe-up speed being only 1 um/cycle.
Overshooting a few mm, which can happen with too high probe speed and low acceleration takes a few seconds to come back from.

I also wonder about the current method to set material height on probe-up.
Admittedly I have only looked at a few hundred contacts so I have not seen everything.
But what I have seen is that contact is consistently found and non-contact, release from contact is more hesitant.
For example here is a contact where the tip went into a water puddle on the table.

 

It failed to register ohmic sensing contact on probe-up. Would have had no problem to register the contact.
I can see it makes sense for the float switch to register material height on probe-up.
For ohmic sensing I think it is more straight-forward to register material height on probe-down.
I'll see if I can find my way in the plasma.comp code and make this mod and see how that works.
  • PCW
  • PCW's Avatar
20 Oct 2025 14:29
Replied by PCW on topic 1000 pulse per rev limit?

1000 pulse per rev limit?

Category: General LinuxCNC Questions

If you are talking about pncconfs scale calculator, the steps per turn number
is intended to be the number of full steps per turn. For almost all step motors,
this number will be 200. So for a standard drive you would leave the "Motor steps
per revolution" at 200 and then say if your drives are set for 16 microsteps per full step,
you would set the "Microstep Multiplication Factor" to 16. This would result in 3200
microsteps per revolution.
  • Lcvette
  • Lcvette's Avatar
20 Oct 2025 13:38

New Probe Basic install - error during install.

Category: QtPyVCP

if you followed the image advice above you already did! :side:
  • Fabse
  • Fabse
20 Oct 2025 13:28

Axis configuration not fully working on 2.9.6

Category: AXIS

Hey guys,
I just now had the time to install the new .deb file and try things out.
All my problems are fixed now. The pendant and MDI commands work as intended again.
Thank you all for your help!
  • clayton2ndtry
  • clayton2ndtry
20 Oct 2025 12:42
Replied by clayton2ndtry on topic burning iso to USB drive

burning iso to USB drive

Category: General LinuxCNC Questions

I downloaded win32diskimager but it has no place for specifying the ISO file. This is no open button.
  • Ayden25
  • Ayden25
20 Oct 2025 12:37
Replied by Ayden25 on topic 1000 pulse per rev limit?

1000 pulse per rev limit?

Category: General LinuxCNC Questions

Yes this is true dont know what that has to do with hitting a software limmit? This isnt a router or plasma table being able to move tenths is going to be important.
  • Ayden25
  • Ayden25
20 Oct 2025 12:34
Replied by Ayden25 on topic 1000 pulse per rev limit?

1000 pulse per rev limit?

Category: General LinuxCNC Questions

In the pncconf it just wont let me enter more then 1000 just running standard 200 pulse per rev closed loop steppers. My issue isnt really a hardware thing though I just cant enter more the 1000.
  • jschulze
  • jschulze
20 Oct 2025 11:47
Replied by jschulze on topic Mini wannabe datron build

Mini wannabe datron build

Category: CNC Machines

Thanks for posting your progress, can't wait to see it in action.
  • meister
  • meister
20 Oct 2025 11:13 - 20 Oct 2025 11:14

Drehrichtung der Achsen Softwareseitig ändern

Category: Deutsch

den scale in der joint config auf - stellen (.ini)

[JOINT_0]
SCALE = -800.0

EDIT: aber wenn es nicht funktioniert wenn man den pin invertiert würde ich nochmal die kabel prüfen, ob die DIR leitung auch wirklich funktioniert
  • jc2ktr
  • jc2ktr
20 Oct 2025 10:39

ethercat verbindung zu bosch-rexroth HCS01 über eoe(ethernet over ethercat)

Category: Deutsch

Habe auch schon 4 Indradrive HCS01 in verschiedenen Varianten am laufen (ca 3 jahre)
habe sie aber nicht als COE Teinehmer sondern als SOE parametriert.
Ich versuche auch schon seit beginn an EOE zum laufen zu bringen. Egal welche IP Einstellungen ich an den Reglern / LinuxCNC ich vornehme, Indraworks DS kann nicht darauf zugreifen.

Alternativ kann man TwinCAT von Beckhoff zur Inbetriebnahme Verwenden.

Gruss Sven
  • jc2ktr
  • jc2ktr
20 Oct 2025 10:31 - 20 Oct 2025 10:32
Replied by jc2ktr on topic Festo CMMT-ST

Festo CMMT-ST

Category: EtherCAT

I´ve got one CMMT-ST drive too, and got it finally to move.
With a absolute Encoder you don´t need Movement for the drives.
If you have HOME_ABSOLUTE_ENCODER = 2 in your .ini file declared.

I could share my Config if needed.

Greetings Sven
  • Aciera
  • Aciera's Avatar
20 Oct 2025 10:31
Replied by Aciera on topic linuxcnc.command().mdi() vs .program_open()

linuxcnc.command().mdi() vs .program_open()

Category: General LinuxCNC Questions

A file containing a subroutine callable with .mdi("o<myfunction> call") is different from a program file that can be opened using .program_open("myfunction.ngc")
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