1 | # This Python file uses the following encoding: latin-1 |
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2 | |
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3 | # Defines all the functions and variables needed to control the motors with the WAGO controller |
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4 | # July 2015, Nicolas Delerue |
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5 | __author__ = 'delerue' |
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6 | |
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7 | |
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8 | from bpm_constants import * |
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9 | |
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10 | |
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11 | VERBOSE_DEFAULT=0 |
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12 | |
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13 | global write_to_motor_dated_log |
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14 | write_to_motor_dated_log = data_dir + './write_to_motor_log' |
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15 | |
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16 | from writeclient import * |
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17 | import time |
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18 | |
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19 | # basic functions |
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20 | def write_to_motor(msg, verbose=VERBOSE_DEFAULT): |
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21 | "This function sends a message to the motor controller" |
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22 | ret = writeclient(motor_controller_IP, motor_controller_port, msg, verbose,datedlog=write_to_motor_dated_log) |
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23 | time.sleep(0.5) |
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24 | return ret |
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25 | |
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26 | |
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27 | def motor_send(message, verbose=VERBOSE_DEFAULT): |
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28 | "Writes a formatted message to a motor" |
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29 | if (len(message) <= 12): |
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30 | print 'Message length ', len(message), ' >', message, '<' |
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31 | while len(message) < 12: |
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32 | message += '0' |
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33 | if len(message) <= 12: |
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34 | return write_to_motor(message, verbose) |
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35 | else: |
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36 | if verbose == 1: |
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37 | print 'Command too long' |
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38 | return 'Command too long' |
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39 | |
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40 | |
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41 | def motor_enable(motor, verbose=0): |
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42 | "Enables a motor" |
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43 | msg = str(motor) + 'CE' |
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44 | motor_send(msg, verbose) |
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45 | |
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46 | |
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47 | def motor_disable(motor, verbose=0): |
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48 | "Enables a motor" |
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49 | msg = str(motor) + 'CD' |
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50 | motor_send(msg, verbose) |
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51 | |
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52 | |
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53 | def motor_reset(motor, verbose=0): |
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54 | "Enables a motor" |
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55 | msg = str(motor) + 'CR' |
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56 | motor_send(msg, verbose) |
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57 | |
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58 | |
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59 | def motor_start(motor, verbose=0): |
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60 | "Starts the movement" |
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61 | msg = str(motor) + 'GG' |
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62 | motor_send(msg, verbose) |
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63 | |
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64 | |
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65 | def motor_stop(motor, verbose=0): |
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66 | "Stops the movement" |
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67 | msg = str(motor) + 'GS' |
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68 | motor_send(msg, verbose) |
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69 | |
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70 | ### Advaned functions |
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71 | def motor_set(motor, param, value): |
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72 | "save parameter defined in the variable 'param', with value 'value'" |
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73 | motor=str(motor) |
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74 | if (param == 'velocity'): |
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75 | if (value > 65535): |
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76 | return 'value is too big' |
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77 | else: |
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78 | return motor_send(motor + ('SV%09d' % (abs(float(value))))) |
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79 | elif (param == 'acceleration'): |
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80 | if (value > 65535): |
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81 | return 'value is too big' |
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82 | else: |
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83 | return motor_send(motor + 'SA%09d' % (abs(value))) |
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84 | elif (param == 'deceleration'): |
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85 | if (value > 65535): |
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86 | return 'value is too big' |
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87 | else: |
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88 | return motor_send(motor + 'SD%09d'(abs(value))) |
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89 | elif (param == 'target_position'): |
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90 | if value > 0: |
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91 | direction = 'P' |
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92 | else: |
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93 | direction = 'p' |
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94 | return motor_send(motor + 'S' + direction + '%09d' % abs(value)) |
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95 | elif (param == 'actual_position'): |
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96 | motor_enable(motor) |
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97 | motor_reset(motor) |
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98 | if value > 0: |
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99 | direction = 'C' |
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100 | else: |
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101 | direction = 'c' |
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102 | ret=motor_send(motor + 'S' + direction + '%09d' % abs(value)) |
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103 | motor_disable(motor) |
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104 | return ret |
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105 | else: |
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106 | return 'Unknown parameter' |
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107 | |
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108 | |
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109 | def motor_get(motor, param): |
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110 | """get parameter defined in variable param, from the motor driver""" |
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111 | motor=str(motor) |
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112 | if (param == 'velocity'): |
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113 | velocity = motor_send(motor + 'QV') |
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114 | velo=float(velocity[3:12]) |
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115 | print velo |
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116 | return velo |
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117 | elif (param == 'acceleration'): |
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118 | acceleration = motor_send(motor + 'QA') |
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119 | accel=float(acceleration[3:12]) |
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120 | print accel |
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121 | return accel |
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122 | elif (param == 'deceleration'): |
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123 | deceleration = motor_send([motor + 'QD']) |
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124 | return deceleration[3:12] |
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125 | elif (param == 'actual_speed'): |
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126 | actual_speed = motor_send(motor + 'QC') |
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127 | isign = 1 |
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128 | if actual_speed[2] == 'c': |
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129 | isign = -1 |
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130 | return isign * actual_speed[3:12] |
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131 | elif (param == 'actual_position'): |
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132 | actual_position = motor_send(motor + 'QP') |
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133 | if actual_position[2] == 'p': |
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134 | isign = -1 |
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135 | else: |
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136 | isign = 1 |
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137 | print actual_position[2:13] |
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138 | print actual_position[3:12] |
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139 | pos = isign * float(actual_position[3:12]) |
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140 | print 'actual position=', pos |
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141 | return pos |
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142 | elif (param == 'status'): |
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143 | status = motor_send(motor + 'QS') |
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144 | status = status[3] |
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145 | if status == 'R': |
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146 | ret='READY' |
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147 | elif status == 'B': |
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148 | ret='BUSY' |
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149 | elif status == 'E': |
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150 | ret='ERROR' |
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151 | else: |
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152 | ret="Unknown "+status |
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153 | print ret |
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154 | return ret |
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155 | elif (param == 'reference'): |
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156 | reference = motor_send(motor + 'QR') |
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157 | if float(reference[3:12]) == 2: |
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158 | return 1 |
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159 | else: |
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160 | return 0 |
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161 | elif param == 'limit': |
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162 | limit = motor_send(motor + 'L') |
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163 | if (limit[1] == 'l'): |
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164 | return 'No limit' |
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165 | elif ((limit[1] == 'L') and (limit[2] == 'B')): |
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166 | return 'Back limit' |
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167 | elif ((limit[1] == 'L') and (limit[2] == 'F')): |
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168 | return "Front limit" |
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169 | else: |
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170 | return 'limit unknown' |
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171 | else: |
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172 | return 'Request unknown' |
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173 | |
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174 | |
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175 | def motor_move_relative(motor, speed, steps): |
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176 | "Moves a motor with the given parameters" |
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177 | motor=str(motor) |
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178 | motor_set(motor, 'velocity', speed) |
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179 | motor_set(motor, 'target_position', steps) |
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180 | motor_send(motor + 'GR') |
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181 | motor_start(motor) |
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182 | |
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183 | def move_motor_relative(motor, speed, steps): |
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184 | motor_move_relative(motor, speed, steps) |
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185 | |
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186 | def motor_move_absolute(motor, speed, steps): |
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187 | "Moves a motor with the given parameters" |
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188 | motor=str(motor) |
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189 | motor_set(motor, 'velocity', speed) |
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190 | motor_set(motor, 'target_position', steps) |
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191 | motor_send(motor + 'GA') |
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192 | motor_start(motor) |
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193 | |
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194 | def move_motor_absolute(motor,speed,steps): |
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195 | "Moves a motor with the given parameters" |
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196 | motor_move_absolute(motor, speed, steps) |
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197 | |
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198 | |
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199 | def motor_wait_for_ready(motor,verbose=VERBOSE_DEFAULT): |
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200 | motor_status=motor_get(motor,'status') |
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201 | iloop=1 |
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202 | while ((iloop<1000) and (motor_status!='READY')): |
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203 | time.sleep(1) |
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204 | iloop=iloop+1 |
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205 | motor_status=motor_get(motor,'status') |
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206 | if (iloop%10==0): |
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207 | motor_pos=motor_status=motor_get(motor,'actual_position') |
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208 | if (motor_status=='READY'): |
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209 | return 1 |
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210 | else: |
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211 | return 0 |
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212 | |
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213 | def controller_hello(): |
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214 | "Sends ça_va query to the motor and display reply" |
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215 | # write_to_motor("ça_va?",1) |
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216 | ret=write_to_motor("ca_va?", 1) |
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217 | print "controller returned: ",ret |
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218 | return ret |
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219 | |
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220 | #controller_hello() |
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221 | #move_motor_relative(1,1000,-1000) |
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222 | #time.sleep(1) |
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223 | #move_motor_relative(1,1000,1000) |
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