joint 0 following error

Hello!

I get each time after it starts program a joint following error.
most of time joint 0. sometimes joint 1 or joint 2.

This thing worked before like dream with linuxcnc.

What causes linuxcnc to display this error?
 

Usually this is a result of a joint setup error in the hal or ini files.

 (Often the step generator is being asked to do something it cannot
so the feedback position lags the commanded position, causing
a following error)

Can you post your hal and ini files?

Of course, should've done directly!

Let me know if you miss any files!

Note those who wonder how looks like underneath the cardboard - had 3d printed some wheels to CNC the machine. Was fun but wouldn't do it again.  

What LinuxCNC version is this?

At one of photos attached at first posting it is 2.7.0 i suppose.

diep wrote:

At one of photos attached at first posting it is 2.7.0 i suppose.

RE:-
MAX_ACCELERATION = 0.3
STEPGEN_MAXACCEL = 0.3
I believe the STEPGEN_MAXACCEL = 0.3 needs to be 25% more than the MAX_ACCELERATION. on each axis

If you have backlash compensation enabled
you must set the stepgen maxaccel value to double
the axis maxacceleration value

Seems have done the job putting those higher!!

Initial speed/acceleration values of machine were really slow. Had tuned those higher past days and then also modified the stepper motor driver values!

Much thanks - would never have figured that one out!



 

Hello everyone,

I have a strange problem with LinuxCNC on a machine that has been configured for a long time and was working perfectly.

Until a few days ago, everything was working fine. Then I modified my Python Touchy GUI file (adding dynamic multi-language translation using `set_label` on some buttons), and from that moment the problem appeared:

> "joint 0 following error" immediately after clicking "Start".

The problem still remains even if I completely delete all the translation modifications (`LABELS` and `on_combo_language_changed`);


Code I had added:

LABELS = {
    "en": {
        "title": "Industry 4.0 Monitoring",
        "total_time": "Total machine work time:",
        "current_job": "Current job time:",
        "next_greaser": "Next greaser in:",
        "time_monitoring": "<b>Time Monitoring</b>",
        "email_section": "<b>Email Notification Management</b>",
        "history_section": "<b>Job History</b>",
        "email": "Email:",
        "add": "Add",
        "remove": "Remove",
        "close_door": "Close Door",
        "open_door": "Open Door",
        "machine_on": "Machine On",
        "machine_off": "Machine Off",
        "home_all": "Home All",
        "pause": "Pause",
        "start": "Start",
        "feed_fast": "Fast",
        "feed_slow": "Slow",
        "feed_override": "Feed Override"
    },
    "it": {
        "title": "Monitoraggio Industria 4.0",
        "total_time": "Tempo totale macchina:",
        "current_job": "Tempo job corrente:",
        "next_greaser": "Prossima lubrificazione in:",
        "time_monitoring": "<b>Monitoraggio Tempo</b>",
        "email_section": "<b>Gestione Notifiche Email</b>",
        "history_section": "<b>Storico Lavorazioni</b>",
        "email": "Email:",
        "add": "Aggiungi",
        "remove": "Rimuovi",
        "close_door": "Chiudi Porta",
        "open_door": "Apri Porta",
        "machine_on": "Macchina On",
        "machine_off": "Macchina Off",
        "home_all": "Home Tutti",
        "pause": "Pausa",
        "start": "Avvio",
        "feed_fast": "Veloce",
        "feed_slow": "Lento",
        "feed_override": "Regolazione Avanzamento"
    }
}

def on_combo_language_changed(self, combo):
    lang = combo.get_active_id() or "en"
    texts = LABELS.get(lang, LABELS["en"])

    # Main Industry 4.0 labels
    self.builder.get_object("title_industria40").set_markup(f"<span size='xx-large' weight='bold'>{texts}</span>")
    self.builder.get_object("label_tempo_totale").set_text(texts["total_time"])
    self.builder.get_object("label_tempo_job_corrente").set_text(texts["current_job"])
    self.builder.get_object("label_tempo_prossimo_greaser").set_text(texts["next_greaser"])
    self.builder.get_object("frame_label_tempo").set_markup(texts["time_monitoring"])
    self.builder.get_object("frame_label_email").set_markup(texts["email_section"])
    self.builder.get_object("frame_label_lavorazioni").set_markup(texts["history_section"])
    self.builder.get_object("label_email").set_text(texts["email"])
    self.builder.get_object("button_add_email").set_label(texts["add"])
    self.builder.get_object("button_remove_email").set_label(texts["remove"])

    # Startup tab buttons
    self.builder.get_object("estop_reset").set_label(texts["close_door"])
    self.builder.get_object("estop").set_label(texts["open_door"])
    self.builder.get_object("machine_on").set_label(texts["machine_on"])
    self.builder.get_object("machine_off").set_label(texts["machine_off"])
    self.builder.get_object("home_all").set_label(texts["home_all"])
    self.builder.get_object("cycle_pausee").set_label(texts["pause"])
    self.builder.get_object("cycle_startt").set_label(texts["start"])
    self.builder.get_object("feed_override_plus").set_label(texts["feed_fast"])
    self.builder.get_object("feed_override_minus").set_label(texts["feed_slow"])

    # Feed Override label, keeping the percentage value
    current_text = self.builder.get_object("feed_override_label").get_text()
    percentage_part = current_text.split(":")[1] if ":" in current_text else " 100%"
    self.builder.get_object("feed_override_label").set_text(f"{texts}: {percentage_part}")