mpylab.device.mc_teseq_stirrer module

TESEQ stirrer motor-controller driver and low-level serial helper.

exception mpylab.device.mc_teseq_stirrer.AngleError(new_angle, current_angle, angle_error_threshold)

Bases: Exception

Raised when the stirrer cannot reach the requested target angle.

class mpylab.device.mc_teseq_stirrer.MOTORCONTROLLER(SearchPaths=None)

Bases: MOTORCONTROLLER

Class to control TESEQ stirrer.

GetSpeed()

Return configured stirrer speed placeholder value.

GetState()

Return error, current angle, and estimated motion direction.

Goto(pos)

Move stirrer to an absolute position in degrees.

Init(ini=None, channel=None, ignore_bus=None)

Initialize stirrer hardware and move to known idle state.

Move(dir)

Start clockwise or counter-clockwise motion.

Quit()

Stop the stirrer motor.

SetSpeed(speed)

Set stirrer speed (currently not implemented).

class mpylab.device.mc_teseq_stirrer.Stirrer(port_parameters={}, status_retries=10, do_not_open=False)

Bases: object

Low-level serial controller for the TESEQ stirrer drive.

close()

Close the serial port and mark drive as uninitialized.

property current_angle

Return current stirrer angle in degrees.

default_port_parameters = {'baudrate': 9600, 'bytesize': serial.EIGHTBITS, 'dsrdtr': False, 'exclusive': False, 'inter_byte_timeout': None, 'parity': serial.PARITY_NONE, 'port': '/dev/stirrer', 'rtscts': False, 'stopbits': serial.STOPBITS_ONE, 'xonxoff': True}

degpersec = 36

property drive_initialized

Return whether the drive is initialized and currently idle.

property error

Return whether the controller reports an error.

property error_message

Return current controller error message.

goto_angle(angle, direction=1)

direction = 1 -> clockwise

goto_next_angle()

Move to the previously stored target angle.

initialize_drive()

Initialize the drive if required and return initialized state.

lock_message = 'STIRRER Controller V1.50 is locked. Please check SYNC position and restart the controller!'

property motor_running

Return whether the motor is currently moving.

read_termination = ' \r'

run_anti_clockwise()

Start continuous counter-clockwise rotation.

run_clockwise()

Start continuous clockwise rotation.

set_next_angle(angle)

Store the next absolute target angle on the controller.

step_anti_clockwise_by(step)

Move counter-clockwise by a relative angle in degrees.

step_clockwise_by(step)

Move clockwise by a relative angle in degrees.

stirrer_parameters = {'acc': 65, 'maxspeed': 6, 'minspeed': 0.18}

stop_motor()

Stop motor movement and return motor-running state.

write_termination = '\r'

exception mpylab.device.mc_teseq_stirrer.StirrerLockedError

Bases: Exception

Raised when the stirrer controller reports a locked state.

mpylab.device.mc_teseq_stirrer.main()

Run a simple interactive CLI for the stirrer controller.