Source code for instruments.NewportPM500

'''
Newport Controler Class
    implementation for vertical stage
'''

#import visa
import time
import sys

class NewportPM500(object):

    def __init__(self, gpib_addr):
        '''
         Constructor

         gpib_addr (string): the GPIB adress of the controller (e.g. 'GPIB0::22::INSTR')
        '''

        if sys.platform.startswith('win'):
            self.rm = visa.ResourceManager()
            self.dev = self.rm.open_resource(gpib_addr)
            self.velocity = 0
            print 'PM500 Controler started on adress: {}'.format(gpib_addr)

    def set_velocity(self, vel):
        '''
         Set the velocity for the motor movement

         vel (integer): velocity in um/sec
        '''

        self.velocity = vel

    def move_up(self):
        '''
         Moves the stage to positive limit switch
        '''

        if self.velocity == 0:
            print 'PM500: invalid move, have to set velocity first.'
            return

        if self.dev.write('YS {}'.format(self.velocity))[1] != 0:
            print 'PM500: problem occured while sending command'
            return

        while self.dev.query('YSTAT') != 'YL':
            time.sleep(0.01)

        print 'PM500: move complete -> UP'

    def move_down(self):
        '''
         Moves the stage to negative limit switch
        '''

        if self.velocity == 0:
            print 'PM500: invalid move, have to set velocity first.'
            return

        if self.dev.write('YS -{}'.format(self.velocity))[1] != 0:
            print 'PM500: problem occured while sending command'
            return

        while self.dev.query('YSTAT') != 'YL':
            time.sleep(0.01)

        print 'PM500: move complete -> DOWN'

    def close(self):
        ''' release resources '''

        if sys.platform.startswith('win'):
            self.dev.close()



'''
Copyright (C) 2017  Robert Polster
This program is free software: you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation, either version 3 of the License, or
(at your option) any later version.

This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
GNU General Public License for more details.

You should have received a copy of the GNU General Public License
along with this program.  If not, see <http://www.gnu.org/licenses/>.
'''