bin/calibcant-calibrate.py

   1 #!/usr/bin/env python
   2 # calibcant - tools for thermally calibrating AFM cantilevers
   3 #
   4 # Copyright
   5
   6 """Run a cantilever calibration using the default AFM
   7 (``pyafm.storage.load_afm()``).
   8 """
   9
  10 import os
  11 import time as _time
  12
  13 from calibcant.calibrate import Calibrator as _Calibrator
  14 from pyafm.storage import load_afm as _load_afm
  15 import calibcant.config as _config
  16
  17
  18 def main(args):
  19     timestamp = '{0}-{1:02d}-{2:02d}T{3:02d}-{4:02d}-{5:02d}'.format(
  20         *_time.localtime())
  21     filename = '{}-calibcant-data.h5'.format(timestamp)
  22     config = _config.CalibrateConfig()
  23     config['bump'] = _config.BumpConfig()
  24     config['bump'].update(
  25         {'model':_config.Linear, 'initial-position':-150e-9})
  26     config['temperature'] = _config.TemperatureConfig()
  27     config['vibration'] = _config.VibrationConfig()
  28     devices = []
  29     try:
  30         afm = _load_afm()
  31         afm.load_from_config(devices=devices)
  32         calibrator = _Calibrator(config=config, afm=afm)
  33         calibrator.setup_config()
  34         deflection = afm.piezo.read_deflection()
  35         afm.stepper_approach(target_deflection=deflection + 1e3)
  36         k,k_s,data = calibrator.calibrate(filename=filename)
  37     finally:
  38         for device in devices:
  39             device.close()
  40     print 'k: {:g} +/- {:g}'.format(k, k_s)
  41     return 0
  42
  43 if __name__ == '__main__':
  44     import sys
  45
  46     sys.exit(main(sys.argv[1:]))