Kynetic is a CNC motion controller that is designed to take advantage of the excellent processing power of the Teensy 3.6 micro controller to produce motion that is superior to the aging architecture commonly used in a majority of 3D printers from consumer to professional. As this project is completely new, no compromises are inherited from legacy code with "hacks" designed to allow for operation on hardware with marginal processing power.
Here's a list of controller functionality.
Currently implemented features:
Features in queue to be implemented:
Here's a list of controller functionality.
Currently implemented features:
- Super smooth 5th order minimum jerk motion planning that maximizes output quality on any class of machine from budget to professional.
- Adaptive program look ahead for smooth motion planning even at high speeds on high density poly lines.
- Intelligent path smoothing reduces machine vibration without effecting surface accuracy or fine part detail.
- Stepper motor pulse generation is performed by a dithering algorithm that reduces resonance while maximizing motor smoothness and accuracy even at extreme speeds and high acceleration.
- Stepper motor position is interpolated to a very small fraction of a micro step. This insures perfect pulse positioning at any speed. Interpolation is done outside of the step generation interrupt, so the computational cost is negligible.
- Extrusion is linked to tip position to insure a more consistent extrusion result during moves with velocity changes.
- Velocity based filament extrusion compensation reduces variations in extrusion rate due to increased nozzle flow resistance at high extrusio rates. This improves the consistency of print extrusion while reducing stringing during traverse moves.
- Optional automatic high-speed z-hops reduce nozzle dragging on already printed surfaces while having almost zero effect on print time. Slicer created Z-hops remain unchanged.
- Supports multiple kinematic machine types (and the list can be expanded):
- Cartesian
- CoreXY / H-bot
- Delta
- High speed program execution from SD card using the integrated SD interface on the Teensy prevents velocity throtting due to insufficient data when executing high speed prints.
- Kynetic can traverse move segments of microscopic and/or zero length without speed throttling or choking. This allows for improved print quality when printing at high speeds, when printing extremely detailed models, or when executing programs with sub-optimal tool path filtering.
- High resolution A/D converters are used with the heater thermistors to provide 8x increase in temperature sensing resolution compared to legacy controllers.
- Feed rate and and extrude rate overrides can be used at any time during the print.
- Interpolated G2/G3 arc moves.
Features in queue to be implemented:
- LCD touch screen interface for control and setting adjustment
- Program execution through serial connection
- Octaprint compatibility for remote printer operation and monitoring
- Auto bed leveling
- Auto heater PID tuning
- SPI control of stepper drivers (specifically support for TMC2130)
- About a billion more features...
This page will be updated as the project continues and tasks are completed and others are added to the todo list.
Thanks for your interest
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