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  • Jocman
  • Jocman
Today 09:06

MAC address not retrieved (after 2 years stop)

Category: Driver Boards

I've tried to update the system, but I get this:
joccnc@JocCnc:~$ sudo apt update
[sudo] password for joccnc:
Sorry, try again.
[sudo] password for joccnc:
Ign:1 http://linuxcnc.org stretch InRelease
Err:2 http://linuxcnc.org stretch Release
Cannot initiate the connection to linuxcnc.org:80 (69.163.143.134). - connect (101: Network is unreachable)
Ign:3 http://security.debian.org/debian-security stretch/updates InRelease
Err:4 http://security.debian.org/debian-security stretch/updates Release
404 Not Found [IP: 151.101.2.132 80]
Ign:5 http://ftp.debian.org/debian stretch InRelease
Err:6 http://ftp.debian.org/debian stretch Release
404 Not Found [IP: 146.75.62.132 80]
Reading package lists... Done
E: The repository 'http://linuxcnc.org stretch Release' does no longer have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: The repository 'http://security.debian.org/debian-security stretch/updates Release' does no longer have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.
E: The repository 'http://ftp.debian.org/debian stretch Release' does no longer have a Release file.
N: Updating from such a repository can't be done securely, and is therefore disabled by default.
N: See apt-secure(8) manpage for repository creation and user configuration details.

As I can understand, there's something wrong (it seems almost...impossible to not find anything. Windows maybe, but Linux.....): too old version (2.7.14)???.
Anyway, I'm a little bit demoralized...
2 years ago I made the last job (a double sided PCB) and everything was perfect, then shutdown the system.
I can't understand what happened.
Before keeping going on with making you waste your time (I don't want it), as per your experience my problems can be related to:
1) software (linuxcnc) failure?
2) Mesa board failure?
3) MB failure?

In case 1), if I install the last linuxcnc release, will it be any chance to retrieve my current setup and customization (hoping it can fix the current problem)? 4 years ago I've spent almost 4-5 months to set linuxcnc (and with your needfull support, by myself I can't do anything....) and customize my axis with the function I normally use, so lose everything is something I don't want to....

Anyway, please tell me your opinion, I'll follow your suggestions.
  • Hakan
  • Hakan
Today 08:42 - Today 08:43
Replied by Hakan on topic Lichuan 4 axis stepper need help-

Lichuan 4 axis stepper need help-

Category: EtherCAT

The same thing happens when people switch between csp and pv modes (rotary axis to spindle motor and back),
they have problem with the rotary position feedback. Could there be a general way? Save the position, and later
create an offset to add to the position feedback. Sounds like that could work.

The point I wanted to make about cia402 state machine was that the device decides the state,
the cia402 component can only react and ask for a change of state. 
 

The cia402 component really only uses two states, disabled and op enabled, controlled by the enable pin.
Either transition to and stay in disabled mode, or transition to and stay in op enabled mode.
When in op enabled state, you can switch between the different operation modes. Anyway.

Is there no message in the syslog when you have a mismatch between pdos? I would have expected something there.
 
  • grandixximo
  • grandixximo's Avatar
Today 05:52 - Today 05:55
Replied by grandixximo on topic scurve trajectory planner

scurve trajectory planner

Category: General LinuxCNC Questions

The sp_scurve code is based on S-curve (7-segment) trajectory planning mathematics, which uses jerk-limited motion profiles derived from the kinematics equations of motion.

Mathematical Foundation
The core math is based on third-order polynomial motion equations with controlled jerk (rate of change of acceleration):


Position: P(t) = P₀ + V₀·t + ½·A₀·t² + ⅙·J·t³
Velocity: V(t) = V₀ + A₀·t + ½·J·t²
Acceleration: A(t) = A₀ + J·t
These equations appear explicitly throughout the code (e.g., lines sp_scurve.c:187-197, 842-844, 1089-1091).

Key Mathematical Components
7-Segment S-Curve Profile - The trajectory is divided into 7 phases (S0-S6/n0-n6):

S0: Increasing jerk (acceleration ramps up)
S1: Constant acceleration
S2: Decreasing jerk (acceleration ramps down to 0)
S3: Constant velocity (cruise)
S4: Decreasing jerk (deceleration begins)
S5: Constant deceleration
S6: Increasing jerk (deceleration ramps to 0)
Cubic Equation Solving - The solve_cubic() function at lines 80-184 solves cubic equations using Cardano's formula and trigonometric method for finding roots.

There is a Newton-Raphson Method - The solute() function at lines 54-68 uses Newton-Raphson iteration to solve polynomial equations, but it is not in use, Cardano's formula is computationally superior.

Stopping Distance Calculation - Based on the relationship Amax² = V·J + 0.5·a² (line 949), derived from integrating the jerk-limited motion equations.

Attribution
The code credits go to 杨阳 (Yang Yang) as the original author, he also referenced a Chinese technical document at doc88.com/p-9119146814737.html for the S-curve formulation.
  • abdulasis12
  • abdulasis12
Today 05:29

Question about using Deadband in calibration when switching from Position to Spe

Category: Basic Configuration

Thnk you , for fast respond
Today I try again with your advice I and D change to 0 and clear all paremeter in calibration box
again its not help
now
X axis
P 17 , I = 0 , D = 0
deadband same result can't touch
I try re config FF0 FF1 FF2 but not any change
now FF0 = 0 FF1 = 0.04 FF2 = 0

but there is still a slight vibration/noise at standstill that I cannot get rid of yet.

FYI : DELTA ASDA-A3 750w

Thank you again for your help.
Asis,
  • fsabbatini
  • fsabbatini
Yesterday 02:17
Replied by fsabbatini on topic scurve trajectory planner

scurve trajectory planner

Category: General LinuxCNC Questions

Good job my friend!
Can you provide any paper or info of the math background you used for it?
  • OT-CNC
  • OT-CNC
Yesterday 23:31
Replied by OT-CNC on topic How do I lubricate correctly?

How do I lubricate correctly?

Category: Milling Machines

I bought a similar grease gun. You can get cheaper ones off ebay if you search for Jiabara threaded style for 70-80 gram tubes. 
The tubes are a clever accordion that screws onto the grease gun.
I did not like the nozzle/rigid stem. It locks on really tight. So maybe the real deal works better.
If you have old LM blocks with brittle plastic, you risk the chance of pulling the grease fitting out of the plastic threads. 
Be aware that some manufacturers use grease fittings with an odd pitch of M6x0.75! In case you need to modify something.

I have a machine that recommends 2 different greases. NSK Grs AS2 for the LM blocks and LR3 for the ball screws. AS2 is probably fine for both. 

I'm thinking of adding a centralized lubrication system to my current project instead of trying to access each block under the way covers. 
I have used Bijur pump and metering units adapted to ball screws and LM guides in the past using vactra no2.
I'm interested in finding out what others are doing that is more of a modern system. 
I know Haas went through a couple of redesigns with their remote lube/grease systems.
 
  • tommylight
  • tommylight's Avatar
Yesterday 22:23

motor-0-position error beim Abbremsen aus 4-7,5 m/min

Category: Deutsch

Did you try lowering the acceleration?
The default of 750mm/s/s is to much for some machines.
  • grandixximo
  • grandixximo's Avatar
Yesterday 21:33 - Yesterday 22:36
Replied by grandixximo on topic LinuxCNC S-Curve Accelerations

LinuxCNC S-Curve Accelerations

Category: General LinuxCNC Questions

github.com/grandixximo/linuxcnc/tree/9d

This is phase 0 completed, according to my plan, this is extremely experimental work in progress, there are known issues at the moment, no arcs no blends, no scurve, as illustrated by the plan you can find at this post, which I got not much feedback..

forum.linuxcnc.org/38-general-linuxcnc-q...ons?start=640#341856

Next phase it is IMO too hard to be vibe coded, but I will try in my spare time.
  • rodw
  • rodw's Avatar
Yesterday 19:46
Replied by rodw on topic Lichuan 4 axis stepper need help-

Lichuan 4 axis stepper need help-

Category: EtherCAT

The issue with the original code was it was developed with a machine that homes to index so it does not work cleanly with home to sensor. The real problem  is that during device homing, Linuxcnc throws following errors because it has not commanded movement. What generally needs to happen is the position feedback is synced with commanded position so Linuxcnc is happy. This is why most working solutions also provide their own cia402.comp

Yes, I think homing can be standardized for cia402 devices and the new home comp is there now to support that. So much of homing.c becomes irrelavent with device homing so the homecomp allows control of what is needed. I've had a couple of goes at it. The first was obsoleted by a rewrite of the homecomp paradigm.

The cia402 state machine is actually very simple. very linear with the exception of error and safety steps to prior states. The flowchart here is a good resource
www.kebamerica.com/blog/comprehensive-gu...a-402-drive-profile/

Anyway, back on task. It occurred to me that I had included some standard PDO's that are not reported by Ethercat pdos. I will revisit that. 

 
  • Mr1576
  • Mr1576
Yesterday 19:11
Replied by Mr1576 on topic HAL Edits for RS485 / VFD Spindle Control

HAL Edits for RS485 / VFD Spindle Control

Category: HAL

Thanks for your reply @andypugh

I copied and pasted your suggestion into my HAL file, replacing the original erroneous text.

Unfortunately when launching Linuxcnc, an error is shown up as attached in the .png file.

Revised HAL file also attached.

Regards

Phil

File Attachment:

File Name: XYYZA2PPTREV1.txt
File Size:5 KB
  • grandixximo
  • grandixximo's Avatar
Yesterday 18:51
Replied by grandixximo on topic LinuxCNC S-Curve Accelerations

LinuxCNC S-Curve Accelerations

Category: General LinuxCNC Questions

I mostly run G64 P0.05 in metric, G64 P0.002 in inches, G61 is afterthought for us, but will be tested...
  • Lcvette
  • Lcvette's Avatar
Yesterday 18:07
Replied by Lcvette on topic Probe Basic Stable error

Probe Basic Stable error

Category: QtPyVCP

the on screen button and physical button cannot remain synchronized as the screen cannot physically change the mushroom buttons state. so you will need to add in some hal NOT allowing the UI estop button in probe basic to be in a state different from the physical mushroom button.
  • andypugh
  • andypugh's Avatar
Yesterday 17:08
  • andypugh
  • andypugh's Avatar
Yesterday 17:03

XHC-WHB04B-06 rotary knob button feed rate not work

Category: Advanced Configuration

You could quickly check if those have the desired affect by opening halshow, opening the "watch" tab and picking those pins from the tree. Then you can set values directly.

If that works then link them up in HAL.
  • andypugh
  • andypugh's Avatar
Yesterday 16:59
Replied by andypugh on topic The Current Bread & Butter Setup?

The Current Bread & Butter Setup?

Category: General LinuxCNC Questions

One advantage of the Pi is that it is perfectly reasonable to have an identical spare to swap in in case of trouble.
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