110 lines
3.9 KiB
Markdown
110 lines
3.9 KiB
Markdown
There are several features still to be implemented in Klipper. In no
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particular order:
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Host user interaction
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=====================
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* See if there is a better way to report errors. Octoprint sometimes
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doesn't highlight an error (one has to look in the terminal tab to
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find the error) and errors written to the log can be non-obvious to
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a user.
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* Improve gcode interface:
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* Provide a better way to handle print nozzle z offsets. The M206
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command is cryptic to use and it is too easy to set the value
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incorrectly or to forget to set it.
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* Provide a way to temporarily disable endstop checks so that a user
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can issue commands that potentially move the head past
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position_min/position_max.
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* Remove the "custom" block from the mcu section of the config and add
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support for config sections to define CPU cooling fans, default LED
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settings, stepper micro-controller pins, and digipot settings. It is
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more user friendly to configure the printer via additional config
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sections than via low-level micro-controller commands.
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* Improve logging:
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* Possibly collate and report the statistics messages in the log in a
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more friendly way.
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* Possibly support a mechanism for the host to limit maximum velocity
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so that the mcu is never requested to step at a higher rate than it
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can support.
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Safety features
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===============
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* Support loading a valid step range into the micro-controller
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software after homing. This would provide a sanity check in the
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micro-controller that would reduce the risk of the host commanding a
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stepper motor past its valid step range. To maintain high
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efficiency, the micro-controller would only need to check
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periodically (eg, every 100ms) that the stepper is in range.
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* Possibly support periodically querying the endstop switches and use
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multiple step ranges depending on the switch state. This would
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enable runtime endstop detection. (However, it's unclear if runtime
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endstop detection is a good idea because of spurious signals caused
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by electrical noise.)
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* Support validating that heaters are heating at expected rates. This
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can be useful to detect a sensor failure (eg, thermistor short) that
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could otherwise cause the PID to command excessive heating.
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Testing features
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================
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* Complete the host based simulator. It's possible to compile the
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micro-controller for a "host simulator", but that simulator doesn't
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do anything currently. It would be useful to expand the code to
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support more error checks, kinematic simulations, and improved
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logging.
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Documentation
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=============
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* Document and test running the host software on a Beagle Bone Black.
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* Add documentation describing how to perform bed-leveling accurately
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in Klipper. Improve description of stepper phase based bed leveling.
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Hardware features
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=================
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* Port to additional micro-controller architectures:
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* Beagle Bone Black PRU
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* Smoothieboard / NXP LPC1769 (ARM cortex-M3)
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* Unix based scheduling; Unix based real-time scheduling
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* Support for additional kinematics: scara, etc.
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* Support shared motor enable GPIO lines.
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* Support for multiple extruders.
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* Support for bed-level probes.
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* Possible support for touch panels attached to the micro-controller.
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(In general, it would be preferable to attach touch panels to the
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host system and have octoprint interact with the panel directly, but
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it would also be useful to handle panels already hardwired to the
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micro-controller.)
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* Possibly support printers using multiple micro-controllers.
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Misc features
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=============
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* Possibly use cubic functions instead of quadratic functions in step
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compression code.
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* Possibly support a "feed forward PID" that takes into account the
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amount of plastic being extruded. If the extrude rate changes
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significantly during a print it can cause heating bumps that the PID
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overcompensates for. The temperature change due to the extrusion
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rate could be modeled to eliminate these bumps and make the
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extrusion temperature more consistent.
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