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OK if you have a significant PWM channel 0 value number, PWM channel 0 is enabled
and there is no watchdog fault, that does point to a hardware issue. Its just very odd
because of the way the offset PWM works, any kind of hardware issue tends to result
is output stuck at some multiple volt output level, not 0V.

I changed the encoder filter to 0 on each axis, it had no effect. I wonder if I can somehow drive the servo without a closed loop and see if it works.

i believe all floating-point values in linuxcnc are doubles:

typedef double real_t __attribute__((aligned(8)));
#define hal_float_t volatile real_t

should be enough to hold 32-bit integers without precision loss

Hello guys,
bad news for me.
Today i installed the VFD to the wall a bit far away from the control box. After i was done, i wanted to check if everything works and check if i still have some noise problems from the VFD. 
Due to the fact that i am again totally confused from 5-6hours of trying to fix it, i am not anymore sure if i got the unexpected real time delay on first start up (but later i got it all the time), but i have found out that when i jog by keyboard or mouseclick on the jog buttons quickly, lets say couple of short and quick jogs, then i get a joint following error 0 and the machine is then off. When i put it on and do the same quick and short jogs then i get following error 1. Then again the same and following error 2. (i would not take the sequence serious, i later also got following error 1 first, at least i believe, but i am not 100% sure)
I GET NO FOLLOWING ERROR WHEN:
- Jogging normalny, no quick clicks
- running a program

Is it possible that USB is the problem?
I havent changed anything since i posted the screenshot of the very-good latency in latency-histogram.

More info:
It happens also that when i want to start Linuxcnc i get a error (see picture), but its possible that it starts after trying second or third time.
Also sometimes Linuxcnc got stuck (freeze) or the whole PC, but of course i started to play around with the Bios settings and specific bios settings could create more problem.

I dont have PS/2 keyboard / mouse available to test. Changing two USB settings in BIOS did not help. (legacy usb something and one other option)

So, if you will have no idea, then my only option might be the 7i76eu, BUT i am also thinking to go back to Wheezy and Linuxcnc 2.8, IF its possible to do file sharing with e.g. Samba, but i believe that all tutorials are before windows did something to block the file sharing. Rodw wrote something about it, here in this thread.
PS: I need nothing but working Linuxcnc, mousepad/geany and file sharing or a browser that works so i can send files by mail or open Microsoft OneDrive.


 

thx there will be a DB37 breakout board in the box and 10 overrule switches on front side

It all took a little longer, but I have a presentable development status for version 6.0.

In Probe Basic, the tool measurement routine can now be fully configured via its own user tab.
The page also contains a subpage with a little help on the settings.
The settings are no longer communicated via parameter file (.var), but via HAL pins. The parameter file now functions as a backup. Either because you want to test other values ​​or as a security backup.

Using the installation script, the files and folders can be quickly edited and moved to their location. Of course, a backup of all files is created. In the test phase, however, it might not be a bad idea to back up the machine folder completely.

LinuxCNC min 2.9.3, Probe Basic min 0.6.0-37.dev and QTPYVCP min 5.0.2-5.dev are required.

Nothing has actually changed in the routine's processes and no new functions have been added yet. Nevertheless, the routine for the connection to the GUI has been revised.
What has changed, is the way in which the offset is created for tools with a large diameter. An offset is no longer created across the board from a certain diameter, but a value is entered in percent in the "FNT ANGLE" column in the tool table. This means that each tool can be offset individually.

You can find everything here: github.com/TooTall18T/tool_length_probe/tree/develop

The routine itself can also be used without Probe Basic (user tab). Information about this can be found in the manual.

You just have to respect the max current of the transformer ! Tommy say metal core transformers can withstand a lot of overload, he's right, but I would think a toroidal one is not this type, and you could have magnetic saturation.

If you don't know your load current, just put a fuse to protect the output and you will see.

Yes, that how i tested it.

Thank you Aciera for sharing tips, will definitely convert it to motion pins.

I have gone thrugh the motion section pins in  linuxcnc.org/docs/html/man/man9/motion.9.html , but i am unable to find the feed override inputs. can you please share more details on this...
 

NEAT !

I am sure i answered this on the other topic.
But since internet has become a cesspool of bad information, you have every right to doubt me.
Just in case:
-normal metal core transformers can withstand a lot of overload, granted they do not exceed the isolation melting temperature
-stepper drives do not pull 5A from the transformer for a 5A motor, and yes the motor gets 5A easily but the drive might pull a single amp from the transformer. This is an EXAMPLE!!!
-the above depends hugely on the motor and drive voltage
-etc

The cabinet control relay holder with boards. 
the box is just 3d printet and the relay boards are from ali..ex...press for like 2 Euro.

 

Its is exactly the 5ABOB config for the Sainsmart 5 Axis BOB with an added stepgen
on DB25 pins 1 and 14 (removing the PWMgen from pin 1) all other pins are GPIO

Yeah but someone starts a topic mentioning half a nanometre it's going to raise some interest. It's getting around to the level of the CMM NIST has in the US.
Precision is interesting whether it's a machinist hitting tenths on a manual lathe, a grader operator nailing a sub roadbed to the millimetre, the construction of the bridge over the harbour in the capital of my state or the work of Brunel in the 1800s.

Could StepGen be used to convert the absolute position data from the Fanuc encoder channels to quadrature pulses for outputting to encoder input on the drives?