plugins/pauseAtZ.py

   1 #Name: Pause at height
   2 #Info: Pause the printer at a certain height
   3 #Depend: GCode
   4 #Type: postprocess
   5 #Param: pauseLevel(float:1.0) Pause height (mm)
   6 #Param: parkX(float:150) Head park X (mm)
   7 #Param: parkY(float:0) Head park Y (mm)
   8 #Param: moveZ(float:5) Head move Z (mm)
   9 #Param: retractAmount(float:1) Retraction amount (mm)
  10
  11 __copyright__ = "Copyright (C) 2013 David Braam - Released under terms of the AGPLv3 License"
  12 import re
  13 from Cura.util import profile
  14
  15 def getPrintZValue(lineBlock):
  16         '''
  17         look for the last z value found just before (or at the same time) G1 code in the given block
  18         '''
  19         lastZ = -1
  20         for line in lineBlock:
  21                 lastZ = getValue(line, 'Z', lastZ)
  22                 if line.startswith('G1 ') and (getValue(line, 'X', None) is not None or getValue(line, 'Y', None) is not None):
  23                         break
  24
  25         return lastZ
  26
  27
  28 def getValue(line, key, default = None):
  29         if not key in line or (';' in line and line.find(key) > line.find(';')):
  30                 return default
  31         subPart = line[line.find(key) + 1:]
  32         m = re.search('^[0-9]+\.?[0-9]*', subPart)
  33         if m is None:
  34                 return default
  35         try:
  36                 return float(m.group(0))
  37         except:
  38                 return default
  39
  40 with open(filename, "r") as f:
  41         lines = f.readlines()
  42
  43 z = 0.
  44 x = 0.
  45 y = 0.
  46 pauseState = 0
  47 #state 0 system is not active until we get to a smaller layer than the last encountered layer (default at 99999) (print one at a time support.)
  48 #state 1 system is active and we are looking for our target layer z
  49 #state 2 system found the layer it need to write. We will wait for the first G1 or G0 code to write the content just before. state will be set to 0
  50
  51
  52 with open(filename, "w") as f:
  53         lineIndex = 0
  54         lastLayerIndex = 99999
  55         layerZ = 0
  56         for lIndex in xrange(len(lines)):
  57                 line = lines[lIndex]
  58                 if line.startswith(';'):
  59                         if line.startswith(';LAYER:'):
  60                                 currentLayer = int(line[7:].strip())
  61
  62                                 if currentLayer < lastLayerIndex:
  63                                         pauseState = 1
  64
  65                                 lastLayerIndex = currentLayer
  66                                 if pauseState == 1:
  67                                         layerZ = getPrintZValue(lines[lIndex:lIndex+20])
  68                                         if layerZ >= pauseLevel:
  69                                                 pauseState = 2
  70
  71                         f.write(line)
  72                         continue
  73
  74                 x = getValue(line, 'X', x)
  75                 y = getValue(line, 'Y', y)
  76
  77                 if pauseState == 2:
  78                         g = getValue(line, 'G', None)
  79                         if g == 1 or g == 0:# We will do the pause just before printing content. We need to pause from the previous XY position. Not the current.
  80                                 z = layerZ
  81
  82                                 pauseState = 0
  83                                 f.write(";TYPE:CUSTOM\n")
  84                                 #Retract
  85                                 f.write("M83\n")
  86                                 f.write("G1 E-%f F6000\n" % (retractAmount))
  87
  88                                 zChanged = False
  89                                 #Change z before doing the move because the nozzle can hit the glass lock on the UM2
  90                                 if z + moveZ < 15:
  91                                         zChanged = True
  92                                         f.write("G1 Z15 F300\n")
  93
  94                                 elif moveZ > 0:
  95                                         newZ = z + moveZ
  96                                         maxZ = profile.getMachineSettingFloat('machine_height') - 10 #For Safety Leave a 10mm space (endstop)
  97                                         if maxZ < newZ:
  98                                                 newZ = maxZ
  99
 100                                         if newZ > z:
 101                                                 zChanged = True
 102                                                 f.write("G1 Z%f F300\n" % (newZ))
 103
 104                                 #Move the head away
 105                                 f.write("G1 X%f Y%f F9000\n" % (parkX, parkY))
 106
 107                                 #Disable the E steppers
 108                                 f.write("M84 E0\n")
 109                                 #Wait till the user continues printing
 110                                 f.write("M0\n")
 111                                 #Push the filament back, and retract again, the properly primes the nozzle when changing filament.
 112                                 f.write("G1 E%f F6000\n" % (retractAmount))
 113                                 f.write("G1 E-%f F6000\n" % (retractAmount))
 114
 115                                 #Move the head back. Move Z at the same time to prevent hitting the glass locks on the UM2
 116                                 if zChanged :
 117                                         f.write("G1 X%f Y%f Z%f F9000\n" % (x, y, z))
 118                                 else:
 119                                         f.write("G1 X%f Y%f F9000\n" % (x, y))
 120
 121                                 f.write("G1 E%f F6000\n" % (retractAmount))
 122                                 f.write("G1 F9000\n")
 123                                 f.write("M82\n")
 124
 125                 f.write(line)