Firmware version 0.3.0 - 29th of October 2025

This release makes significant large and small changes and includes some
safety improvements.

Filament sensor calibration required

IMPORTANT: Upgrading to this version requires the filament sensor to be
recalibrated, which requires the machine to be connected to a computer
via ethernet (via LAN or directly).

This calibration can only be done with the updated calibration kit kit
(that is shippped along with new machines since October/November 2025
and has been sent to existing customers as well).

Notable changes are:

The way the extrusion process is started and controlled has changed
to a somewhat more integrated workflow, with the user interface style
and structure adapted to that.

Of particular note is that (by default) the extrusion screw now
automatically starts when the heaters have reached their setpoints.
This can be disabled, but to protect against material degradation,
the heaters are disabled again if the screw is not started within
5 minutes after reaching the setpoints.
The filament sensor accuracy has been improved, and calibration of the
sensor is made a lot more user-friendly.
Handling of errors has been improved, improving feedback in case
of errors. Some errors are detected earlier and the system shuts down
into a new "safe mode" on fatal errors, adding an extra layer of
safety to the existing low-level safety checks.
When the heaters are turned on or off, the mains relays are now also
turned on or off, which were previously turned on once during
startup. This might produce a small clicking sound.

Detailed changes

Below all user-visible changes are listed in detail. In addition, many
internal improvements have been made that are not directly visible.

Extrusion process

feature: The extrusion process (starting heaters and screw)
is now controlled from the dashboard, and (by default) the screw
starts rotating automatically when the temperature setpoints have been
reached instead of controlling each component separately.
feature: Heaters now automatically shut down if the screw remains idle
for 5 minutes after reaching target temperature. This prevents
material degradation when the screw is not started in time.
feature: Add interface to visualize current motor torque as an aid
during extrusion. Since motor torque readings are unreliable when the
motor current is higher than needed for the current load, this
interface also allows reducing the motor current to make the torque
readings more accurate.
feature: Improve filament sensor accuracy and calculation method.
Because of this change, the sensor must be recalibrated after this
version is installed. The old calibration data is preserved, so if the
system software is downgraded the old calibration will be used again.
feature: Calibration no longer requires a transparent calibration
rod, just two opaque rods are sufficient.
feature: Extrusion now stops completely when the hopper is removed.
Previously, the screw was only temporarily disabled and resumed
automatically when the hopper was reattached.
fix: Make motor stall detection more sensitive, to prevent cases where
the motor stalled but the software did not detect this.
fix: Small fix to the heater control bias values for heater 2 and 3.
.
change: When automatic puller speed control is disabled, the puller
speed now does not reset to the preset value, but keeps it current
value for smoother operation.
fix: Do not stop the positioner and winder when changing any setting,
but only when the spool/positioner settings were actually changed.
change: Setting any heater setpoint to 0 no longer stops the extrusion
process, since heaters can be enabled and disabled separately since
a while.

User interface

feature: The design and structure of the user interface was updated to
better reflect the extrusion process.
feature: Icons and splashscreen have been updated with new and improved
icons and 3devo logo.
feature: Redesign the calibration web interface. This replaces the old
and very basic interface with a more polished one that provides more
guidance and feedback and is a lot easier to use.
feature: UI also displays measured filament diameter for each
sensor view (left, middle, right) individually.
feature: Now displays if a motor encoder is connected within the systems
menu item on the settings page.
fix: Make links unclickable on small screens to prevent navigating the
on-machine display to a webpage that could not be returned from.
fix: Fix influx url on settingspage (use http instead of https)..
fix: Only show the current preset as "modified" if the current values
are different from the preset values (previously changing values and
then changing them back would still show as "modified").

Safety

feature: When an error occurs, the system is put into a newly defined
"safe mode", where all the hardware is cleanly shut down, which also
prevents (theoretical) further software issues from causing damage.
This replaces the more ad-hoc shutdown that happened before. Making
the shutdown is more thorough also prevents showing followup errors
that are unrelated to the actual problem.
feature: As an extra safety feature, only enable the mains relays when
the heaters are enabled instead of directly on machine startup.
change: On a thermocouples read failure, instead of showing
a non-fatal alert, retry the read a number of times. If all retries
fail, shut down the system into safe mode.

Error handling

feature: Automaticallly save log messages to internal flash when
a fatal error occurs and when the system is updated (normally log
messages are not saved to prevent wear on the internal flash). Saved
messages include recent messages from before the error (or update) and
all messages until the system is powered off. The logs can be accessed
by inserting a USB drive that contains a folder calld "logs", all
saved logs will be copied when the drive is inserted.
feature: Improve various (internal) error messages.
feature: When a panic occurs handling an HTTP request, turn off the
hardware to ensure safety and show an alert.
feature: Alerts shown in the UI can now be collapsed again after they
were expanded.
fix: Alert messages are now sorted by time, instead of using an
arbitrary order that could change every second.
fix: In some cases (especially when a machine was powered off without
a clean shutdown, or after a system update) the startup would be too
slow and the safety watchdog would shut down the system before it was
started properly. The allowed startup time is extended to prevent
this.
change: When a motor overload condition has occured, an alert is
shown. When it is resolved again, that alert is now no longer
automatically hidden, to prevent missing an overload condition that
only occurs briefly.
fix: Reading values from the adc (hopper sensor and spooling tension
sensor) very rarely fails. This is now retried once so extrusion can
continue normally.

Other changes

change: Heater numbering in influx has changed from using a 0-based
"index" tag to a 1-based "number" tag, to match influx to the UI.
fix: Some potential (theoretical) race conditions have been fixed
by adding mutexes.
The predefined filament and spooling preset is now read-only and cannot
be changed, but you can create new custom presets based on them (which
will then both be shown). For machines upgrading from an older
version, the previously created "PLA 1.75mm (3mm nozzle)" and "Devo
Spool" presets are kept as custom presets, in case any changes were
made in them. If no changes were made, the custom versions of the
presets can be manually deleted.
change: No longer show warning alert on IRCamera errors, these are
usually harmless.

Assets 6

13 Aug 15:28

3devo-write-access

v0.2.3

f7755f8

v0.2.3

Firmware version 0.2.3 - 13th of August 2025

This is a release that fixes multiple issues and contains a couple of new features:

fix: Network configuration could not be changed because the needed dropdown was
not displayed.
fix: In some cases when an update failed or was interrupted, the system could get
into a broken state showing a blue screen. If this happens, the system
will now recover when restarted.
fix: When a fatal error within a go routine would occur the API process would
become unavailable, with this change the API will still be available to
report what error occured in a safe way and shutdown the hardware.
fix: Spamming of thermocouple notifications into user friendly notifications.
feature: Hostname will now align with the serial number of the machine.
feature: Enable StealthChop for screw and pullers which results in less noise while
using.
feature: User friendly IRCamera alert added.