printrun-src/calibrateextruder.py

Fri, 03 Jun 2016 09:42:44 +0200

author
mbayer
date
Fri, 03 Jun 2016 09:42:44 +0200
changeset 16
36d478bde840
parent 15
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child 45
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permissions
-rw-r--r--

Implemented svg, png and hpgl compilers to pronterface

15
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1 #!/usr/bin/env python
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2 # This file is part of the Printrun suite.
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3 #
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4 # Printrun is free software: you can redistribute it and/or modify
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5 # it under the terms of the GNU General Public License as published by
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6 # the Free Software Foundation, either version 3 of the License, or
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7 # (at your option) any later version.
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8 #
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9 # Printrun is distributed in the hope that it will be useful,
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10 # but WITHOUT ANY WARRANTY; without even the implied warranty of
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11 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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12 # GNU General Public License for more details.
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13 #
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14 # You should have received a copy of the GNU General Public License
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15 # along with Printrun. If not, see <http://www.gnu.org/licenses/>.
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16
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17 # Interactive RepRap e axis calibration program
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18 # (C) Nathan Zadoks 2011
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19
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20 s = 300 # Extrusion speed (mm/min)
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21 n = 100 # Default length to extrude
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22 m = 0 # User-entered measured extrusion length
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23 k = 300 # Default amount of steps per mm
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24 port = '/dev/ttyUSB0' # Default serial port to connect to printer
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25 temp = 210 # Default extrusion temperature
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26
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27 tempmax = 250 # Maximum extrusion temperature
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28
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29 t = int(n * 60) / s # Time to wait for extrusion
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30
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31 try:
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32 from printdummy import printcore
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33 except ImportError:
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34 from printcore import printcore
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35
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36 import time
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37 import getopt
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38 import sys
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39 import os
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40
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41 def float_input(prompt=''):
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42 f = None
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43 while f is None:
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44 s = raw_input(prompt)
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45 try:
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46 f = float(s)
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47 except ValueError:
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48 sys.stderr.write("Not a valid floating-point number.\n")
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49 sys.stderr.flush()
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50 return f
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51 def wait(t, m=''):
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52 sys.stdout.write(m + '[' + (' ' * t) + ']\r' + m + '[')
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53 sys.stdout.flush()
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54 for i in range(t):
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55 for s in ['|\b', '/\b', '-\b', '\\\b', '|']:
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56 sys.stdout.write(s)
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57 sys.stdout.flush()
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58 time.sleep(1.0 / 5)
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59 print
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60 def w(s):
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61 sys.stdout.write(s)
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62 sys.stdout.flush()
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63
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64
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65 def heatup(p, temp, s = 0):
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66 curtemp = gettemp(p)
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67 p.send_now('M109 S%03d' % temp)
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68 p.temp = 0
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69 if not s: w("Heating extruder up..")
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70 f = False
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71 while curtemp <= (temp - 1):
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72 p.send_now('M105')
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73 time.sleep(0.5)
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74 if not f:
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75 time.sleep(1.5)
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76 f = True
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77 curtemp = gettemp(p)
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78 if curtemp: w(u"\rHeating extruder up.. %3d \xb0C" % curtemp)
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79 if s: print
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80 else: print "\nReady."
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81
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82 def gettemp(p):
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83 try: p.logl
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84 except: setattr(p, 'logl', 0)
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85 try: p.temp
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86 except: setattr(p, 'temp', 0)
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87 for n in range(p.logl, len(p.log)):
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88 line = p.log[n]
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89 if 'T:' in line:
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90 try:
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91 setattr(p, 'temp', int(line.split('T:')[1].split()[0]))
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92 except: print line
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93 p.logl = len(p.log)
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94 return p.temp
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95 if not os.path.exists(port):
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96 port = 0
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97
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98 # Parse options
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99 help = u"""
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100 %s [ -l DISTANCE ] [ -s STEPS ] [ -t TEMP ] [ -p PORT ]
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101 -l --length Length of filament to extrude for each calibration step (default: %d mm)
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102 -s --steps Initial amount of steps to use (default: %d steps)
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103 -t --temp Extrusion temperature in degrees Celsius (default: %d \xb0C, max %d \xb0C)
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104 -p --port Serial port the printer is connected to (default: %s)
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105 -h --help This cruft.
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106 """[1:-1].encode('utf-8') % (sys.argv[0], n, k, temp, tempmax, port if port else 'auto')
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107 try:
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108 opts, args = getopt.getopt(sys.argv[1:], "hl:s:t:p:", ["help", "length=", "steps=", "temp=", "port="])
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109 except getopt.GetoptError, err:
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110 print str(err)
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111 print help
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112 sys.exit(2)
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113 for o, a in opts:
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114 if o in ('-h', '--help'):
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115 print help
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116 sys.exit()
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117 elif o in ('-l', '--length'):
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118 n = float(a)
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119 elif o in ('-s', '--steps'):
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120 k = int(a)
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121 elif o in ('-t', '--temp'):
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122 temp = int(a)
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123 if temp >= tempmax:
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124 print (u'%d \xb0C? Are you insane?'.encode('utf-8') % temp) + (" That's over nine thousand!" if temp > 9000 else '')
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125 sys.exit(255)
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126 elif o in ('-p', '--port'):
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127 port = a
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128
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129 # Show initial parameters
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130 print "Initial parameters"
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131 print "Steps per mm: %3d steps" % k
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132 print "Length extruded: %3d mm" % n
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133 print
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134 print "Serial port: %s" % (port if port else 'auto')
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135
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136 p = None
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137 try:
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138 # Connect to printer
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139 w("Connecting to printer..")
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140 try:
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141 p = printcore(port, 115200)
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142 except:
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143 print 'Error.'
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144 raise
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145 while not p.online:
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146 time.sleep(1)
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147 w('.')
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148 print " connected."
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149
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150 heatup(p, temp)
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151
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152 # Calibration loop
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153 while n != m:
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154 heatup(p, temp, True)
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155 p.send_now("G92 E0") # Reset e axis
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156 p.send_now("G1 E%d F%d" % (n, s)) # Extrude length of filament
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157 wait(t, 'Extruding.. ')
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158 m = float_input("How many millimeters of filament were extruded? ")
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159 if m == 0: continue
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160 if n != m:
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161 k = (n / m) * k
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162 p.send_now("M92 E%d" % int(round(k))) # Set new step count
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163 print "Steps per mm: %3d steps" % k # Tell user
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164 print 'Calibration completed.' # Yay!
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165 except KeyboardInterrupt:
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166 pass
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167 finally:
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168 if p: p.disconnect()

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