Now that homing is implemented via "drip moves", it is no longer
necessary to move the print_time backwards.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Rework the low-level implementation of homing movement. The existing
mechanism buffers all homing movement into the micro-controller prior
to starting the home. Replace with a system that buffers all movement
into the host look-ahead buffer and then "drip feed" those moves to
the micro-controllers. Then clear the host look-ahead buffer when all
endstops trigger.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
If commands are slowly fed to the printer it could cause the number of
queued commands to grow without bound. Be sure to pause the incoming
command stream even if the lookahead queue is empty.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Add "gcode_position" named tuple to gcode.get_status(). Add a
"position" named tuple to toolhead.get_status().
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Instead of directly turning off motors, heaters, and fans from
gcode.py, raise a new event and allow the heater, fan, and toolhead to
handle the event as needed.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Convert all users of the printer_state("shutdown") handler to register
a "klippy:shutdown" event handler instead.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Limit speed and acceleration of extrude only moves to just the
max_extrude_only_velocity and max_extrude_only_accel config settings.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
If a requested value is higher than the configured maximum, then just
limit the value to the configured maximum instead of raising an error.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Only clear the internal sync_print_time flag if the code performs a
regular "lazy" flush of the look-ahead queue. This helps build the
look-ahead queue even when running internal scripts.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
The max_accel_to_decel variable must not be greater than the max_accel
variable. Make sure to check this when M204 changes max_accel.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Commit 4573932f allowed move.end_pos to differ from the requested end
position - the toolhead class should use the updated position when
storing its commanded position.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
It's possible that a g-code transform class may make an extrude only
move appear as a kinematic move due to limitations of double precision
math. Handle this by checking for an inconsequential move distance
instead of checking for a move distance of exactly zero.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Move the "motor_off_timeout" tracking to a new module in the extras/
directory. This makes it easier to customize the idle timeout
behavior.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
The junction_deviation configuration parameter has a number of quirks
that make it difficult to configure. Replace it with a
"square_corner_velocity" configuration parameter.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Move extruder.py, cartesian.py, corexy.py, and delta.py to a new
kinematics/ sub-directory. This is intended to make adding new
kinematics a little easier.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Use the new gcode.register_mux_command() so that SET_PRESSURE_ADVANCE
works correctly with multiple extruders.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
If max_accel_to_decel is greater than max_accel in the config, then
just internally limit max_accel_to_decel to max_accel. This makes it
easier to completely disable the max_accel_to_decel feature (as it can
just be set to a high value in the config).
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
The existing junction algorithm limits the speed between two moves by
determining the maximum speed an arc between those two moves would
have if the cetripetal acceleration of that arc did not exceed the
printer's maximum acceleration.
However, should the slicer send an actual arc to the printer, then the
existing junction algorithm would not impose any significant limit on
the travel speed of that arc. This would permit the head to travel in
a circle at high velocity and with a greater centripetal acceleration
than the printer's maximum acceleration. To avoid this, impose a
limit on the junction velocity of short moves so that an approximate
centripetal acceleration of that move does not exceed the move's
acceleration limit.
Suggested by Michael Barbour.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Add support for displaying basic status information on ST7920 and
HD44780 based LCDs that are attached directly to a micro-controller.
Signed-off-by: Marcio Teixeira <marcio@alephobjects.com>
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Instead of using the toolhead class to determine if stats should be
reported, allow every printer object with a stats() callback to
determine if stats are needed.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Add support for disabling homing checks via the homing_override
mechanism. This may be useful to move an axis prior to homing it.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Instead of hardcoding which objects are called on state transitions,
allow any "printer object" to be invoked if it has a printer_state()
method. Convert connect, ready, shutdown, and disconnect callbacks to
this mechanism.
Similarly, allow all printer objects to provide a stats() callback.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Add get_reactor(), lookup_object(), lookup_module_objects(), and
set_rollover_info() to the main Printer class so that callers do not
need to peek into the class' members. Similarly, add get_printer()
and get_name() methods to the ConfigWrapper class.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
The previous code increases print_stall if a move is proactively
flushed due to buffer_time_low and a follow up move is ready to send
before the existing moves are fully retired. However, this would not
track the case where a move is proactively flushed and it takes an
extended amount of time to get sufficient moves to refill the queue.
Change the code so that print_stall increases anytime a new move is
queued after a proactive flush and there are existing moves not yet
fully retired.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Move the homing logic out of toolhead.py and into homing.py. This
simplifies the toolhead logic and centralizes the homing code.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Translate caught exceptions into a gcode.error() exception. This way
there is one standard place to invoke respond_error(). Also, always
reset the last_position on a handled error.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Instead of adding 250ms to each homing operation add a time relative
to the number of estimated steps that are to be generated. This
scales the delay to really large axes without adding a delay for
normal users.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
If an MCU signals a shutdown from the background thread, notify the
main thread and handle the shutdown there. Dispatch shutdown handling
from the main Printer() class instead of from the Toolhead class.
This simplifies the shutdown logic.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
It is possible to have an acceleration greater than max_z_accel on
XY+Z moves. That needs to be taken into account when calculating the
min_stop_interval. This prevents spurious "No next step" MCU errors.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Kevin O'Connor