We have new hardware design as of 3-16-2017! The new hardware includes a buck regulator to power board from the motor voltage. Additionally it has an enable pin and level sifting on all the IO pins. Check it out at www.misfittech.net
FW 0.11 has been pushed to Github
- Fixed a bug where motors were only getting half current
- Fixed an issue with noise in the calibration - http://misfittech.net/2017/02/02/calibration-noise/
- Added predictive phase advancement for increased speed
FW 0.09 has been pushed to Github
- Added a planner for stand alone controller application you can move with constant velocity
- Cleaned up and documented the command line interface
FW 0.08 has been pushed to github.
- LCD menu is functional
- Added support for velocity PID mode
- Added enable pin support and !Enable
FW 0.06 planned features 12-8-2016
- Improve LCD menu to allow access to menu any time and break out as own module
- Add motor parameters to flash (step size, wiring direction, desired rotation direction for dir pin polarity, etc)
- Add protocol between host (Marlin/smoothie) and Smart Stepper such that host can update parameters on fly
- Allow the Error/Enable pin as bidirectional open collector type of signaling system.
- Add the velocity PID control loop
- Review option for a speed limit system
- Continue work on the relay tuning and auto tune features.
- As always if you have any feature requests or comments email me or post a comment at misfittech.net
FW 0.05 updates
The pipeline read of the AS5047 has been fixed, this has increased the loop speed of the control loop such that control loop is around 120us. This also allows the control loop speed to be increased to 6kHz.
The mode command has been added. This allows the user to switch between open loop, simple control loop, and positional PID control loop modes. More control loop modes will be added.
Added support for the Mechaduino hardware
PID parameters are stored in flash as floating point but in code used as scaled fixed point values.
The LCD code will be updated to show which control loop mode the system is operating in.
As always if you have any feature requests or comments email me or post a comment at misfittech.net
FW 0.04 Updates 11-27-2016:
I have update the LCD so the position shown is absolute desired motor position, hence two rotations from start is 720 degrees
The command line interface has move command and readpos commands, which in closed loop operation will move to desired location. For example move 720 will move the motor two rotations from the starting location.
The move and readpos are great if you want to make playback functionality. For example if the NZS is connected to a robotic arm you could readpos as you manually move the arm then you could play back that movement by using the move command.
The firmware also has improved the critical section handling of the firmware.
here is a video: