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  • tommylight
  • tommylight's Avatar
26 Jan 2025 01:14

How to configure the 7i77 electronic board to always start with a + 10 V ?

Category: Advanced Configuration

Analog voltage from inductive sensor? Is that the position sensor for the ram/cylinder?
Maybe using the values from that sensor to home or to check and retract the ram at LinuxCNC start?
Also use the value from that sensor to stop the machine from moving anything else if not in upper position. I would strictly tie this to motion feed hold if this is punch press so the part can not move until the ram is up. This i think is a must on such machines. Also to make sure the material has stopped before ramming down...
  • VincentValentine
  • VincentValentine
26 Jan 2025 00:43 - 26 Jan 2025 00:46
Replied by VincentValentine on topic Raspberry Pi OS PREEMPT RT 6.13 Kernel Cookbook

Raspberry Pi OS PREEMPT RT 6.13 Kernel Cookbook

Category: Installing LinuxCNC

Getting a Hunk #1-9 succeeded, and a few lines later (right after trace.c) a HUNK #1 failed during the patch. 

install and kernel activation does seem to complete if it’s ignored. 
  • programador
  • programador's Avatar
25 Jan 2025 23:57

How to configure the 7i77 electronic board to always start with a + 10 V ?

Category: Advanced Configuration

Is the cylinder controlled by -10 volts advances and +10 volts retracted position 0 volts gradually descends
Note: I am using translate google sorry for any inconvenience
  • programador
  • programador's Avatar
25 Jan 2025 23:53

How to configure the 7i77 electronic board to always start with a + 10 V ?

Category: Advanced Configuration

Thanks for the feedback, good suggestion, but since I'm very late on this project, physically installing a sensor will take more time and I don't know if the client will accept it on the next visit. Your idea helped me to try a different way, maybe never tried before in LinuxCNC, which would be to take the analog voltage reading from the inductive sensor that is present and already part of the original machine and create a logical ladder to compare the voltage from zero to 10V where 8.6 volts would be the virtual limit switch. With your experience, do you think it is possible to use an analog reading and determine certain thresholds to turn on and off a bit memory in the ladder and use it as a limit switch?
  • EmcRules
  • EmcRules
25 Jan 2025 23:29
Replied by EmcRules on topic 5 Bar Parallel Kinematics

5 Bar Parallel Kinematics

Category: Advanced Configuration

Found my issue. The internal encoder parameter is not getting set properly on the 7041's In my XML config file I have the encoder modparm set to false but when i open a terminal after axis has started up and check the parameter using "ethercat -p upload --type uint8 0x8012 0x08" it shows it as zero instead of 1. I suspect something in the driver code is not jiving with the revision of the modules i have. When I set the parameter manually after axis has opened up. The simulated encoder feedback is updated on the pins as it should be and all is well.
  • tommylight
  • tommylight's Avatar
25 Jan 2025 23:07
  • tommylight
  • tommylight's Avatar
25 Jan 2025 23:04

How to configure the 7i77 electronic board to always start with a + 10 V ?

Category: Advanced Configuration

Is it setup as a normal axis?
Adding a switch and using it for homing would work in that case.
Adding the switch would be advisable in any case and set it in hal so it does not allow anything to move if the cylinder is not in the upper position.
  • rodw
  • rodw's Avatar
25 Jan 2025 23:00
Replied by rodw on topic x86 Parallels LinuxCNC VM

x86 Parallels LinuxCNC VM

Category: Installing LinuxCNC

I understand that I cannot demand better answers; I have no control over how people respond. I have control over:

1) How I ask questions;
2) Where I ask questions.

I need to get better at both.

Its great that you acknowldge that responsibility for the receiving of a message rests with the sender!

None of us know anything about Parallels. People have succesfully installed Linuxcnc on apple hardware from an ISO but the machine no longer runs macOS

You can't run a CNC machine from a VM because it requires a real time operating system (eg runs PREEMPT_RT kernel) 
For testing and experimenting, I would install Debian 13 (aka Trixie) using a CD ISO from cdimage.debian.org/cdimage/weekly-builds/
Drilling down to AMD64 cd-iso, it looks like there is a Mac version
cdimage.debian.org/cdimage/weekly-builds/amd64/iso-cd/

Be sure you are connected to a wired internet connection before running the installer
When installing Debian, ensure you install the XFCE or mate desktop (our ISO uses XFCE)
to install Linuxcnc then all you have to do is type:
​​​​​​​sudo apt install linuxcnc-uspace

 
  • tommylight
  • tommylight's Avatar
25 Jan 2025 22:57
Replied by tommylight on topic x86 Parallels LinuxCNC VM

x86 Parallels LinuxCNC VM

Category: Installing LinuxCNC

This time you can blame it on me as if i recall correctly, Parallels is the software running on Apple hardware and makes it possible to run other operating systems in it, in short running virtual machines.
If that is correct, then all my answers are on point, it should run any ISO without making images on other hardware, that is the whole point of it.
Then again, it is Apple, so maybe only runs ARM stuff?
  • programador
  • programador's Avatar
25 Jan 2025 21:58

How to configure the 7i77 electronic board to always start with a + 10 V ?

Category: Advanced Configuration

Thank you for your response.
Yes, you are correct. The position feedback should function properly as long as LinuxCNC is running, so I just need to set the position to retract the head at the end of the G-code, and the initial Z position should be in the retracted state.
However, when starting the machine, the process must be done manually to ensure that the Z-axis is retracted, preventing a potential mechanical issue where the Z-axis could be extended and collide with the punches.
How can I ensure that the Z-axis is retracted before executing the G-code program?
  • Hakan
  • Hakan
25 Jan 2025 21:54
Replied by Hakan on topic Erklärung Ethercat

Erklärung Ethercat

Category: Deutsch

And please mention which model of the Lichuan servo and servo drive you use.
I assume they are cia402 devices. Here is a link to the cia402 component with a minimal example how to set it up.
github.com/dbraun1981/hal-cia402
  • juliankoenig87
  • juliankoenig87
25 Jan 2025 21:48
Replied by juliankoenig87 on topic scurve trajectory planner

scurve trajectory planner

Category: General LinuxCNC Questions

Found another one.
The slider for max velocity is working incorrect.

Video

As one can see, I test stupid high velocities, accelerations, jerk values and so on. With such experiments I am able to crash the tp. But no freezes of linuxcnc and I am able to stop the program and restart it without a problem.
  • peterdownunder
  • peterdownunder
25 Jan 2025 21:32 - 25 Jan 2025 21:33
Replied by peterdownunder on topic Jog not working on new install

Jog not working on new install

Category: Plasmac

Ok, sorted it out. IO error (Idiot Operator)

Not quite sure of the combo, but something to do with the TRAJ section set to inch, not mm, and the default Jog speed set to a very low value 60 meant that the axis was moving, but at such a slow rate that I did not even see it (although the computer is not right beside the Plasma table)

Seems to have all movement sorted out now. Time to get the plasma firing.
  • cmorley
  • cmorley
25 Jan 2025 21:08
Replied by cmorley on topic qtdragon additonal buttons

qtdragon additonal buttons

Category: Qtvcp

try this one.
  • juliankoenig87
  • juliankoenig87
25 Jan 2025 20:48
Replied by juliankoenig87 on topic scurve trajectory planner

scurve trajectory planner

Category: General LinuxCNC Questions

Hi Grotius,

had some time to test. First of all. No freezes, overflows what so ever. So well done!

I found two things and I made two videos to show it:
1.) When stopping or pausing the code the DRO dont stop. this is with my 4 axis testmachine. With the 9axis sim machine this dont happen. Both machines show strange DTG values for the A axis.

Video 1

2.) Of course in the first video the max jerk limits the feed override. So I tested a insane 2000% feed override with insane max jerk and something happened. Up to 500% everything looks fine. Over 500% it stops the code. Then I have to back up to ~350% and everthing starts again. So, yeah, not a real usecase, but I found it while going crazy at testing - sorry.

Video 2
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