Raising an error from the background message reception thread isn't
well defined. Instead, on a temperature fault, invoke a printer
shutdown.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Those chips that require an spi init sequence can generate the message
directly in the chip specific class.
Also, don't send an spi init message for chips that are read-only.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
The MAX6675 chip has a different read sequence than the MAX31855 chip.
Signed-off-by: Ricardo Amézquita <ramezquitao@cihologramas.com>
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>
It's rare to have all the Z stepper locations directly under the
printable surface, so using z_positions for points is not a good
default.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Allocate the stepper_kinematics directly in mcu.py - that way the
kinematic classes don't have to interact with the chelper code.
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>
Don't issue a get_config command after building the config as the
built config may contain time sensitive initialization commands.
Instead, send the config and init commands immediately after invoking
the build_config() callbacks. This avoids some rare "timer too close"
errors during configuration.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Switch the host code from the CLOCK_MONOTONIC clock to the Linux
specific CLOCK_MONOTONIC_RAW clock. It's common for ntp to slew the
CLOCK_MONOTONIC clock to account for drift, and that can break the
host's ability to make accurate predictions of the micro-controller
clock. This could lead to "move queue empty" errors. The
CLOCK_MONOTONIC_RAW clock is not slewed and thus should not have this
problem.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Add M117 and M73 to the list of supported G-Codes.
Also, remove M117 from the list of commands reported by the HELP
command as that command is typically only used to list "extended
g-code" commands.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Add generic temperature smoothing to the Heater class. This is useful
to avoid min_extrude_temp and verify_heater errors due to measurement
noise.
Rename the pid_deriv_time config option to smooth_time so that the
smoothing amount need only be specified once.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Extend the ADC out of range check so that it is possible to sample
multiple times before going into a shutdown state. This reduces the
chance that measurement noise will cause an error. In an actual over
temperature (or under temperature event) it is expected that the
sensor will consistently report the problem, so extra checks for an
additional second or two should not substantially increase risk.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Add mcu support for periodically polling for a button press. Add host
code support for registering buttons and invoking callbacks for them.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Add the ability to register callbacks - both asynchronous (ie, from
another thread) and synchronous.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Add an ability to run a series of g-code commands from a reactor
callback that isn't part of the normal g-code command processing.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Font from fntcol16.zip package:
ftp://ftp.simtel.net/pub/simtelnet/msdos/screen/fntcol16.zip
(c) Joseph Gil
Font is public domain
Signed-off-by: Eric Callahan <arksine.code@gmail.com>
Update the target temperature during the pid calibration. This gives
additional feedback to the user and it makes it less likely that a
verify_heater error will be raised during calibration.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Move the display code into its own directory. This is in preparation
for splitting it up into its own modules.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
When M117 is followed by an empty string, the display will reset to
Klipper's default.
Internal modules may look up the display and directly call
set_message(), with a timeout if desired.
Signed-off-by: Eric Callahan <arksine.code@gmail.com>
- Add M73 support for HD44780
- Include HD44780 USB and SD glyphs to differentiate progress type
- Fix bug that prevented M73 from updated when virtual_sd is enabled
- Add 5 second timeout to reset display when not Printing
Signed-off-by: Eric Callahan <arksine.code@gmail.com>
It appears the st7920 requires a longer delay when switching from
command to data mode (and vice-versa). Slower MCUs don't show a
problem because the klipper command processing time results in a
sufficient delay. However, some of the faster MCUs can process
klipper commands fast enough that the next st7920 transfer is sent too
fast. Add an additional delay to account for this.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
The different uses of get_position() can be confusing, so choose a
different name for the ProbePointsHelper callback.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Move the trilateration algorithm to mathutil.py. It may be useful
outside of delta kinematics, and it complicates the delta code.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Add support for an itersolve_set_position() function that sets a
stepper position from a cartesian coordinate. This eliminates the
need for both the python and C code to be able to translate from a
cartesian coordinate to a stepper position.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Calculating the cartesian position from the stepper positions can be
complex and cpu intensive, so rename it to calc_position() to be more
descriptive.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
After a probe operation, homing_move() will already have recalculated
the toolhead position. The get_position() method can be slow, so use
the already calculated position.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Update the code to use the term "rail" when dealing with a motor
controlled "axis". A rail has a series of steppers and endstops that
control that motor controlled "axis".
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Add additional wrapper functions so that no outside callers need to
peak into the member variables of PrinterStepper.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
All the kinematic code now uses the iterative solver to generate
steps. Remove the old stepcompress_push_const() mechanism.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Use the -fwhole-program option when compiling the host C code. This
makes it easier to support inlining across C files.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
This change will make the "PROBE" command actually reply with the
z-position where the probe triggers. As this command is called
internally for the BED_TILT_CALIBRATE and Z_TILT_ADJUST those commands
will also give a response while probing, which I see as advantage over
the silent operation.
This change also lets one define some gcode for a repeatable probing
test to meassure the quality of the sensor and overall probing accuracy.
Signed-off-by: Hans Raaf <hr-klipper@oderwat.de>
Added a config parameter to define the homing override axes. This way
one can still home x and y axis without the z-probe cycle coming in the
way.
Signed-off-by: Hans Raaf <hr-klipper@oderwat.de>
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Disable the verify_heater checks when debugging, as otherwise it can
cause failures when processing files in batch mode.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
In some rare circumstances it was possible for the host software to
become so busy that it does not transmit a get_clock request for
several seconds. (In particular, this could occur with some complex
calls to coordinate_descent.) If that happened, it was possible for
the code to incorrectly report a "Timeout with MCU" error. Rework the
is_active() check to prevent that.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Apply the changes made by a SET_GCODE_OFFSET command to the next move,
even if the move is relative to the last movement. This allows the
command to implement "babystepping" requests.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Change the get_status command to get_clock. Don't report the shutdown
status in the new get_clock command.
The primary purpose of this change is to force the host code to report
a firmware version mismatch with older firmwares as recent changes
(namely the ordering of message block acks) have subtle
incompatibilities if different host/mcu code is used.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Normally, the MCU is restarted on a config change. However, that
should not be done automatically if the MCU is in a shutdown state.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
If the mcu is using a traditional serial port, then only send a new
message block if there is space available in the mcu receive buffer.
This should make it significantly less likely that high load on the
mcu will result in retransmits.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Send the ack after processing commands - this gives the host code more
information on serial buffer utilization.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
If a section name had mixed case it would cause an incorrect error
during the section/option config checking.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Add the ability to add a custom g-code command that in turn executes
one or more configured g-code commands.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
The recommended TOFF time in "standalone mode" according to the
tmc2130 is 4, so use that as the default.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
The extrude_factor and extruder position are specific to the current
extruder, so reset them to default values on a Tn command.
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>
It's common to add commands that dispatch to a particular object
instance depending on the value of a command parameter. (For example,
the command "SET_SERVO SERVO=xyz" wants to be handled by the
particular "xyz" servo instance.) Add a register_mux_command() helper
to gcode.py make it easier to do this.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Move the common config reading and probe object lookup from the
bed_tilt.py and delta_calibrate.py code into the ProbePointsHelper
class.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Raise an error during config parsing if the position_endstop is not
between the position_min and position_max. This avoids a confusing
error message during homing.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
For some reason, Linux creates the pseudo tty with group writable
permissions, but not group readable. Use chmod to allow the device to
also be group readable.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
The step speed rounding and the cpu delay must be run after running
the endstop specific preparation code. Otherwise, a delay in the
home_prepare() code could undo those calculations. Specifically, this
could lead to errors on a multi-mcu setup when the Z is homed using a
virtual_z_offset and there is a delay in the activate_gcode section.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Don't return early on a command error - continue to process remaining
commands and pop commands from the queue.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Use the generic spi send/receive code on Linux. Update the replicape
code to use the updated command format.
Also, update the replicape code to turn off the stepper motors on a
shutdown event.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Improve the SPI message transmit system. Add support for bus speed
and bus mode. Add support for sending SPI messages on shutdown.
Signed-off-by: Petri Honkala <cruwaller@gmail.com>
Signed-off-by: Douglas Hammond <wizhippo@gmail.com>
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
In order to properly delay BACKGROUND_PRIORITY_CLOCK messages, they
must be 5ms beyond the minimum defined by MIN_REQTIME_DELTA. So, add
both MIN_REQTIME_DELTA and MIN_BACKGROUND_DELTA to the timing of these
messages.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
If the clock querying messages occur at a similar frequency to other
events on the micro-controller or host, then it's possible for the
load created by those other events to skew the clock synchronization.
In particular, the 500ms lcd screen update could resonate with the 1
second clock query. Use an unusual clock querying frequency to avoid
this issue.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Move the C code out of the main klippy/ directory and into its own
directory. This reduces the clutter in the main klippy directory.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Add a set_shutdown_speed() method so that the heater_fan code does not
need to peek into the fan object's internal members.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
The M206 command is confusing (it uses negative offsets) and isn't
very flexible. Add a new SET_GCODE_OFFSET command to make it easier
to add virtual offsets to gcode commands.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
The M206 command is confusing as positive values in that command
result in negative offsets to future g-code commands. Perform the
parameter negation in the M206 command instead of storing it that way
internally.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
When using an automatic probe, limit the Z lift speed to be no greater
than the Z probing speed. This can reduce Z jerks during probing.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
If the fan's max power is limited by the config, then scale speed
requests between 0 and max_power. This makes more sense for typical
g-code fan speeds.
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>
Add a fully functional STM32F1 port, currently mostly targeting STM32F103
microcontrollers. This requires an 8 MHz XTAL. The maximum possible step rate
is around 282K steps per second.
This uses stm32flash to burn the firmware. The bootloader needs to be started
by setting BOOT0 to 1 and resetting the MCU. There is no automatic bootloader,
unlike on Arduino.
Signed-off-by: Grigori Goronzy <greg@kinoho.net>
Instead of supporting a single linear range for the temperature
lookup, allow multiple ranges to be defined. This makes the lookup
more accurate when a full lookup table is available.
Update the AD595 sensor to use the full table defined in its spec.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
If the c3 coefficient is negative it can cause the adc calculations to
fail. The c3 shouldn't be negative in practice, so fallback to a
simple beta calculation in that case.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Move the Thermistor code to a new thermistor.py module. Move the
Linear code to a new adc_temperature.py module. This simplifies the
heater.py code.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
The Thermistor (and Linear) class should handle all the details of
reading the ADC values and converting them to temperatures. So, move
that logic out of the Heater() class.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Add a PrinterHeaters class that can stores references to available
temperature sensors and stores references to instantiated heaters.
Add a extras/heater_bed.py file and delay instantiation of the
heater_bed object. This allows the heater.py module to be imported
earlier during the setup phase, and allows the PrinterHeaters class to
be available for registering sensors and heaters.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Most callers did a lookup of the pins module via
printer.lookup_object("pins"). Use that as the standard method and
remove these less frequently used methods.
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>
Apply the bed tilt settings immediately after finding them. This
makes it easier for users to perform automatic tilt calibration at the
start of every print.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Automatically clear the information printed at the start of each log
file rollover on a klippy internal restart.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Drop support for M303 and PID_TUNE, and replace it with a new
PID_CALIBRATE command. Move the logic for this command from heater.py
to a new pid_calibrate.py file in the extras/ directory.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Move the probe_z_offset parameter from delta_calibrate and
bed_tilt_calibrate to a z_offset parameter within the probe config
section. It's easier to understand the z offset setting when it is in
the probe config section.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
If a z_virtual_endstop is in use, then record the last XY position
that is used when the Z is homed. Use that XY position to report what
change is needed to the z position_endstop.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Rename the digital_output, pwm_output, and static_pwm_output config
sections to output_pin and move to a new module in the extras/
directory.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Move the code for the static_digital_output config section from
chipmisc.py to a new file in the extras/ directory.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
It looks like OctoPrint is expecting the result from M114 to be
relative to the last G92 command. Also, introduce GET_POSITION to
report the actual location that the printer is at.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Commit 9bc4239e now emphasizes the first line of a multi-line error
message, so rework startup_message to conform to that.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Report the first line of a multi-line error message twice - once as
part of the informational content, and once with the "!!" error
prefix.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
If a heater falls out of the target range, accumulate the temperature
differences to determine if an error should be raised. This should
make it less likely to report an error for heaters that drift slightly
out of range, and it should make error reporting faster for heaters
that rapidly fall out of range.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
A default of 4 degrees and 10 seconds may be too aggressive - change
the default to 10 degrees and 15 seconds.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Add support for additional carriages on cartesian printers. This is
used by some printers to handle multiple extruders.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Separate out the hd44780 screen drawing from the st7920 code. Use a
layout that takes advantage of the 20 columns. Add custom hd44780
fonts.
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>
Support low-priority message transmits. This may be useful for bulk
commands that should be delayed util the comms are otherwise idle.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Add a lookup_command() method to the SerialReader class that provides
a wrapper that stores the serial and commandqueue references. This
makes it easier to run the send() method.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Add --always flag to "git describe" command to get a build identifier
even if one checks out the repo with a depth parameter that prunes out
the last tagged version.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
The multi-mcu clock syncing code relies on the ability to periodically
update the mcu clock adjustments. If a series of very long moves are
submitted then it is possible the adjustments could become unstable.
For example, if an adjustment is made to reduce a clock error over the
next couple of seconds, but it is applied to a longer period because
the next move lasts many seconds, then this would result in a bigger
adjustment for the following move, which would result in an even
bigger error when that move lasts many seconds. This can repeat until
the system destabilizes.
Check for cases where the print_time is far in the future of the
current estimated print time and average over a longer period in that
case. That should reduce the possibility of the adjustment code
becoming unstable.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Add support for directly printing from a local file on the host. This
may be useful if the host cpu is not fast enough to run OctoPrint
well.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
The bed_tilt_calibrate command determines the tilt of the bed.
However, we need to report the tilt compensation which is the negative
of the bed tilt.
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>
Average clock sync times over approximately 30 seconds instead of 120
seconds so that the clock prediction responds to changes faster.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Use both load_config() and load_config_prefix() functions when
dynamically loading a module from the extras directory - if the config
section name has parameters in it then use load_config_prefix().
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
OctoPrint (and other software) will sometimes send additional commands
even if the previous command has not yet responded with an "ok".
Change the g-code input reading code to keep reading input so that an
M112 can be detected (and processed out-of-order). To avoid the
extreme case where one writes an entire g-code file to the input
without any pacing, disable the input reading if more than 20 commands
are pending.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
If the script being run raises an error, then stop running that script
and return the error to the caller.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Specify hardware pwm cycle times using the same method as software pwm
(in seconds, not clock ticks). Allow the fan code to be configured
with an explicit cycle time even when using software pwm.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
If the mcu supports command restarts and it does not appear to use a
real serial port, then default the restart method to 'command'. This
is a better default on boards with native USB support.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Report the current temperature, current pwm setting, and target
temperature as statistics in the log.
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>
Create a virtual pin that may be used as the z endstop pin on
cartesian printers that use the probe in place of a z endstop.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Allow a set of g-code scripts to be run on each probe invocation.
This may be useful for probes that need to be setup before they are
useful (eg, with servo actuated probes).
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Allow users to override the behavior of G28 using a new
"homing_override" config section. This may be used on printers that
require specific steps during the homing process.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
The print cooling fan and printer heater_fan are independent modules
that can reside in the extras directory.
Signed-off-by: Kevin O'Connor <kevin@koconnor.net>
Check if a config section matches a python filename in the
klippy/extras/ directory. If it does, load that python code to handle
the config section.
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>
Kevin O'Connor
Ricardo Amezquita
Eric Callahan
Janar Sööt
Arksine
Douglas Hammond
Hans Raaf
Michael Barbour
cruwaller
FeepingCreature
Grigori Goronzy
Marcio Teixeira
Dave Bacon