old_contents: #Name: Pause at height
  #Info: Pause the printer at a certain height
  #Depend: GCode
  #Type: postprocess
  #Param: pauseLevel(float:5.0) Pause height (mm)
  #Param: parkX(float:190) Head park X (mm)
  #Param: parkY(float:190) Head park Y (mm)
  #Param: retractAmount(float:5) Retraction amount (mm)
  
  __copyright__ = "Copyright (C) 2013 David Braam - Released under terms of the AGPLv3 License"
  import re
  
  def getValue(line, key, default = None):
  	if not key in line or (';' in line and line.find(key) > line.find(';')):
  		return default
  	subPart = line[line.find(key) + 1:]
  	m = re.search('^[0-9]+\.?[0-9]*', subPart)
  	if m is None:
  		return default
  	try:
  		return float(m.group(0))
  	except:
  		return default
  
  with open(filename, "r") as f:
  	lines = f.readlines()
  
  z = 0.
  x = 0.
  y = 0.
  pauseState = 0
  currentSectionType = 'STARTOFFILE'
  with open(filename, "w") as f:
  	for line in lines:
  		if line.startswith(';'):
  			if line.startswith(';TYPE:'):
  				currentSectionType = line[6:].strip()
  			f.write(line)
  			continue
  		if getValue(line, 'G', None) == 1 or getValue(line, 'G', None) == 0:
  			newZ = getValue(line, 'Z', z)
  			x = getValue(line, 'X', x)
  			y = getValue(line, 'Y', y)
  			if newZ != z and currentSectionType != 'CUSTOM':
  				z = newZ
  				if z < pauseLevel and pauseState == 0:
  					pauseState = 1
  				if z >= pauseLevel and pauseState == 1:
  					pauseState = 2
  					f.write(";TYPE:CUSTOM\n")
  					#Retract
  					f.write("M83\n")
  					f.write("G1 E-%f F6000\n" % (retractAmount))
  					#Move the head away
  					f.write("G1 X%f Y%f F9000\n" % (parkX, parkY))
  					if z < 15:
  						f.write("G1 Z15 F300\n")
  					#Wait till the user continues printing
  					f.write("M0\n")
  					#Push the filament back, and retract again, the properly primes the nozzle when changing filament.
  					f.write("G1 E%f F6000\n" % (retractAmount))
  					f.write("G1 E-%f F6000\n" % (retractAmount))
  					#Move the head back
  					if z < 15:
  						f.write("G1 Z%f F300\n" % (z+1))
  					f.write("G1 X%f Y%f F9000\n" % (x, y))
  					f.write("G1 E%f F6000\n" % (retractAmount))
  					f.write("G1 F9000\n")
  					f.write("M82\n")
  		f.write(line)
  
new_contents: #Name: Pause at height
  #Info: Pause the printer at a certain height
  #Depend: GCode
  #Type: postprocess
  #Param: pauseLevel(float:5.0) Pause height (mm)
  #Param: parkX(float:190) Head park X (mm)
  #Param: parkY(float:190) Head park Y (mm)
  #Param: retractAmount(float:5) Retraction amount (mm)
  
  __copyright__ = "Copyright (C) 2013 David Braam - Released under terms of the AGPLv3 License"
  import re
  
  def getValue(line, key, default = None):
  	if not key in line or (';' in line and line.find(key) > line.find(';')):
  		return default
  	subPart = line[line.find(key) + 1:]
  	m = re.search('^[0-9]+\.?[0-9]*', subPart)
  	if m is None:
  		return default
  	try:
  		return float(m.group(0))
  	except:
  		return default
  
  with open(filename, "r") as f:
  	lines = f.readlines()
  
  z = 0.
  x = 0.
  y = 0.
  pauseState = 0
  currentSectionType = 'STARTOFFILE'
  with open(filename, "w") as f:
  	for line in lines:
  		if line.startswith(';'):
  			if line.startswith(';TYPE:'):
  				currentSectionType = line[6:].strip()
  			f.write(line)
  			continue
  		if getValue(line, 'G', None) == 1 or getValue(line, 'G', None) == 0:
  			newZ = getValue(line, 'Z', z)
  			x = getValue(line, 'X', x)
  			y = getValue(line, 'Y', y)
  			if newZ != z and currentSectionType != 'CUSTOM':
  				z = newZ
  				if z < pauseLevel and pauseState == 0:
  					pauseState = 1
  				if z >= pauseLevel and pauseState == 1:
  					pauseState = 2
  					f.write(";TYPE:CUSTOM\n")
  					#Retract
  					f.write("M83\n")
  					f.write("G1 E-%f F6000\n" % (retractAmount))
  					#Move the head away
  					f.write("G1 X%f Y%f F9000\n" % (parkX, parkY))
  					if z < 15:
  						f.write("G1 Z15 F300\n")
  					#Disable the E steppers
  					f.write("M84 E0\n")
  					#Wait till the user continues printing
  					f.write("M0\n")
  					#Push the filament back, and retract again, the properly primes the nozzle when changing filament.
  					f.write("G1 E%f F6000\n" % (retractAmount))
  					f.write("G1 E-%f F6000\n" % (retractAmount))
  					#Move the head back
  					if z < 15:
  						f.write("G1 Z%f F300\n" % (z+1))
  					f.write("G1 X%f Y%f F9000\n" % (x, y))
  					f.write("G1 E%f F6000\n" % (retractAmount))
  					f.write("G1 F9000\n")
  					f.write("M82\n")
  		f.write(line)
  
subject: Disable E stepper power when using the pause at height feature.