def setStagePosition(self, value):
for axis in self.stage_axes:
if axis == 'b':
pass
else:
try:
if value[axis] < self.stage_range[axis][0]:
raise ValueError('Stage position %s out of range' % axis)
if value[axis] > self.stage_range[axis][1]:
m = 'invalid stage position for %s axis'
raise ValueError(m % axis)
except KeyError:
pass
for axis in value.keys():
if axis == 'b' and value['b'] is not None:
try:
nidaq.setBeta(value['b'])
except:
print 'exception, beta not set'
else:
try:
self.stage_position[axis] = value[axis]
except KeyError:
pass
def _setStagePosition(self, position, relative = 'absolute'):
# tolerance = 1.0e-4
# polltime = 0.01
if relative == 'relative':
for key in position:
position[key] += getattr(self.tecnai.Stage.Position, key.upper())
elif relative != 'absolute':
raise ValueError
pos = self.tecnai.Stage.Position
axes = 0
for key, value in position.items():
if use_nidaq and key == 'b':
deg = value / 3.14159 * 180.0
nidaq.setBeta(deg)
continue
setattr(pos, key.upper(), value)
axes |= getattr(self.tem_constants, 'axis' + key.upper())
if axes == 0:
return
try:
self.tecnai.Stage.Goto(pos, axes)
except com_module.COMError, (hr, msg, exc, arg):
#print 'Stage.Goto failed with error %d: %s' % (hr, msg)
if exc is None:
raise ValueError('no extended error information, assuming stage limit was hit')
else:
wcode, source, text, helpFile, helpId, scode = exc
if winerror.SUCCEEDED(wcode) and text is None:
raise ValueError('no extended error information, assuming stage limit was hit')
else:
raise RuntimeError(text)