Verify Nova Px VB Script Commands

[mvbnano]

VB Script commands have been created on branch dev_ntmdt_stage, however, some commands need to be verified by NT-MDT.

Commands to be verified include:

• Get stage position,

          command =   ('{axis}Pos = GetParam(tBase, cValue, pi_ScrPos{axis}, 0, False)\n\n'
                      'SetSharedDataVal "shared{axis}Pos", {axis}Pos, "F64", 8'
                      .format(axis=axis.upper()))

• Set stage position,

      command =   ('SetParam tBase, cValue, pi_ScrPosX, 0, {xpos}\n\n'
                   'SetParam tBase, cValue, pi_ScrPosX, 0, {ypos}\n\n'
                   'SetParam tBase, cValue, pi_ScrPosX, 0, {zpos}\n\n'
                   'Do\n\n'
                   '\tIdle\n\n'
                   'Loop Until GetParam(tScanner, cStatus, 0) = 0'
                   .format(xpos=param_dict['x'], ypos=param_dict['x'], zpos=param_dict['x']))

• Set stage closed-loop feedback,

          command =   ('SetParam tBase, cValue, pi_Scr{axis}FBState, 0, {to_state}'
                      .format(axis=axis.upper(), to_state=int(to_state)))  # bool to int

• Get scanner range.

          command =   ('Set ParInfo = GetParam(tBase, cInfo, pi_ScrPos{axis}, 0)\n\n'
                      'Val{axis} = ParInfo.MaxValue\n\n'
                      'SetSharedDataVal "shared{axis}PosMax", Val{axis}, "F64", 8'
                      .format(axis=axis.upper()))

[mvbnano]

get_pos is working for x and y values (not yet z) with the below command:

command = ('{axis}Pos = GetParam(tScanner, scPosition, 0, {channel})\n\n'
           'SetSharedDataVal "shared_{axis}Pos", {axis}Pos, "F64", 8'
           .format(axis=axis, channel=channel))

To test z position (in Jupyter):

axis = 'z'
channel = 2

command = ('{axis}Pos = GetParam(tScanner, scPosition, 0, {channel})\n\n'
          'SetSharedDataVal "shared_{axis}Pos", {axis}Pos, "F64", 8'
           .format(axis=axis, channel=channel))

ntmdt_stage._run_script_text(command)

time.sleep(0.5)

ntmdt_stage._get_shared_float('shared_{axis}Pos'.format(axis=axis))

Always returns 0.0.

[mvbnano]

To set stage position:

command = ('SetParam tScanner, scPosition, {scanner}, {channel}, {position}\n'
           'Do\n'
           'idle\n'
           'Loop Until GetParam(tScanner, cStatus, {scanner}) = False'
           .format(channel=0, position=position, scanner=1))

[mvbnano]

As mentioned above, running get and set position code with scanner = 1 and channel = 2 always returns the value of 0.0.

However, it appears that running the code with scanner = 0 and channel = 0 produces a value, see below.

axis = 'z'
channel = 0
scanner = 0
position = 1.56

command = ('SetParam tScanner, scPosition, {scanner}, {channel}, {position}\n'
           'Do\n'
           'idle\n'
           'Loop Until GetParam(tScanner, cStatus, {scanner}) = False'
           .format(channel=0, position=position, scanner=1))

ntmdt_stage._run_script_text(command)

time.sleep(1)

command = ('{axis}Pos = GetParam(tScanner, scPosition, {scanner}, {channel})\n\n'  # setting argument #2 = 1 (previously 0)
           'SetSharedDataVal "shared_{axis}Pos", {axis}Pos, "F64", 8'
           .format(axis=axis, channel=channel, scanner=1))

ntmdt_stage._run_script_text(command)

time.sleep(1)

ntmdt_stage._get_shared_float('shared_{axis}Pos'.format(axis=axis))

Returns 1.5600008373963368

This might be the "tube", a separate piezo component, which will provide satisfactory control if this is true.

[mvbnano]

This (above comment) might not be true, as then running get_pos returned x = 1.56.

[mvbnano]

I have corrected the z axis control code and it is now working. Unknown travel range, possible 7 microns.

[mvbnano]

Movement of the tube can be implemented by changing the scanner number.

[mvbnano]

Confusingly, the 'tube' has 3 axes available in Nova Px. This requires clarification.

[mvbnano]

Clarification of tube axes requested. Included was for additional information about nova px thermo tab.

[mvbnano]

How to find the range of each axis (and for each scanner):

Note that it also depends do you use the closed-loop control or not.