It is only valid to call raise_probe() when the toolhead is not
moving. Make sure to call sync_print_time() from multi_probe_end() to
ensure that. This fixes a bug that could cause the Z axis steppers to
lose their position when "stow_on_each_sample=False".
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
On a reset, the mcu.py code may have sent an initialization message to
the bltouch, which needs time to complete. Add additional time during
the bltouch setup to avoid a race with these two times. This avoids
some "timer too close" errors that users of fast host machines were
reporting.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
There's no reason to distinguish between an EndstopError and a
CommandError, so just use CommandError.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Always disable the PWM after each command sent. Automatically trim
the command duration so the PWM disable doesn't increase the total
pulse time (when the duration is 200ms or greater).
Track the ideal command end time separately from the pwm transmit time
and only delay toolhead moves to this ideal time.
Update verify_state() to automatically schedule the check using the
time of the last sent command.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
The probe_finalize() name is used for callbacks in both the
PrinterProbe and ProbePointsHelper classes. Rename the PrinterProbe
callback to avoid confusion.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This reverts commit 5c8d15bbee.
The lower_probe() code was already manually optimizing the timing of
the pwm disable, and that conflicted with the optimization in commit
5c8d15bb.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Some clones don't raise the pin on a reset and the ANTClabs BL-Touch
sometimes doesn't raise the pin either.
Rework the (infrequently called) sensor test code to always issue a
pin_up command before the touch command. Also, perform a reset and
retry if the sensor test fails.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Be sure to fully raise the probe prior to starting any future toolhead
movements in the multi_probe_end() case.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
If an error is found during the pin_up_not_triggered check, then apply
the reset command for a full second (instead of just 100ms). This
gives the bltouch more time to check its internal state.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Return the triggered state from verify_state() and update the callers
to raise the error (if needed).
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Change home_wait() to return if the homing operation completed
succesfully or not. This simplifies the callers.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Update the endstop code to return its trigger completion object during
home_start(). Update the toolhead class to take a completion object
(instead of creating its own). This reduces the number of
intermediate callbacks needed during a homing operation.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Add support for notifying the low-level probing handlers that a
multiple probe sequence is occurring. This is in preparation for the
bltouch code.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Collapse the "homing:move_begin", "homing:move_end", home_prepare(),
and home_finalize() into two new events: "homing:homing_move_begin"
and "homing:homing_move_end". This simplifies the homing code.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
The caller can now determine which steppers are connected to cartesian
Z movement via the new stepper.is_active_axis() method. It is
therefore no longer necessary for the kinematic code to identify these
steppers.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Update code that modifies the low-level kinematics handlers to first
call toolhead.flush_step_generation().
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Now that the homing code does not call set_commanded_position(), it is
no longer necessary to save/restore the position in the bltouch code.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Now that the PrinterStepper and MCU_stepper classes have been merged,
there is no need for the add_to_endstop() method.
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>
Prior to the BLTouch v3, the recommended command times were 700us
(pin_down), 1200us (touch_mode), 1500us (pin_up), 1800us (self_test),
and 2200us (reset). However, the recommended Marlin timing (via servo
"angles") was 647.111, 1162.667, 1472, 1781.333, and 2193.778us.
As of the BLTouch v3, the recommended times are now 650, 1165, 1475,
1780, and 2190us. The v3 continues to recommended Marlin timings of
647.111, 1162.667, 1472, 1781.333, and 2193.778us.
Update Klipper to use the new BL-Touch v3 recommended timing. The new
timings are required for the BL-Touch v3 and they are closer to what
the Marlin firmware has historically used.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
In the normal case, a regular pin_up command should be sufficient to
raise the probe. (Should the regular pin_up fail, the code can issue
a "reset" command during the retry.)
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Stopping the connect sequence can make it difficult to get the bltouch
out of an error state. Allow the connect to proceed, ideally if the
bltouch stays in an error state it will be detected during the first
probe attempt.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
We want the duration of each command to be an exact multiple of
SIGNAL_PERIOD. The durations might not be exact if the bltouch is on
a secondary mcu. Account for this in send_cmd().
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Rework the undocumented test_sensor_pin config option into a
pin_up_touch_mode_reports_triggered option and document it.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Query the bltouch state during the pin_up command to try and verify
that the probe does actually retract. This may be useful to detect if
the bltouch enters into an "error" state.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
The BLTouch is more accurate when probing in "pin_down" mode than
"touch_mode" (at least on some hardware). Rework the code to use that
mode.
When probing in pin_down mode, the BLTouch can go into an error state
if a pin_up is not sent immediately after a touch signal. Rework the
pin_up code to reduce the time it takes to transmit the command.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Introduce a sync_print_time() method and update send_cmd() to track
the duration of bltouch commands.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Verify that there is always some movement during a probing operation.
This is normally done by the homing.py code (via its verify_movement
check), but that check may not be enabled when z_virtual_endstop is
used. So, always enable the check in the bltouch.py code.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
It appears some bltouch "clones" do not report the probe as triggered
when put in "touch mode" while the pin is raised. Add a config option
to allow users to disable the test.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Some of the bltouch implementations may only respond to a probe event
with a 5ms pulse. Make sure to check the signal pin at least every
millisecond to ensure no signal is lost.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Kevin O'Connor
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