86 lines
2.2 KiB
Python
86 lines
2.2 KiB
Python
#!/usr/bin/python
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#Interactive RepRap e axis calibration program
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#(C) Nathan Zadoks 2011
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#Licensed under CC-BY-SA or GPLv2 and higher - Pick your poison.
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t= 60 #Time to wait for extrusion
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n=100 #Default length to extrude
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m= 0 #User-entered measured extrusion length
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k=300 #Default amount of steps per mm
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port='/dev/ttyUSB0' #Default serial port to connect to printer
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try:
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from printdummy import printcore
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except ImportError:
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from printcore import printcore
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import time,getopt,sys
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def float_input(prompt=''):
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import sys
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f=None
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while f==None:
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s=raw_input(prompt)
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try:
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f=float(s)
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except ValueError:
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sys.stderr.write("Not a valid floating-point number.\n")
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sys.stderr.flush()
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return f
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def wait(t,m=''):
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import time,sys
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sys.stdout.write(m+'['+(' '*t)+']\r'+m+'[')
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sys.stdout.flush()
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for i in range(t):
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for s in ['|\b','/\b','-\b','\\\b','|']:
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sys.stdout.write(s)
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sys.stdout.flush()
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time.sleep(1.0/5)
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print
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#Parse options
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help="""
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%s [ -l DISTANCE ] [ -s STEPS ] [ -p PORT ]
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-l --length Length of filament to extrude for each calibration step (default: %d mm)
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-s --steps Initial amount of steps to use (default: %d steps)
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-p --port Serial port the printer is connected to (default: %s)
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-h --help This cruft.
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"""[1:-1]%(sys.argv[0],n,k,port)
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try:
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opts,args=getopt.getopt(sys.argv[1:],"hl:s:p:",["help","length=","steps=","port="])
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except getopt.GetoptError,err:
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print str(err)
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print help
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sys.exit(2)
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for o,a in opts:
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if o in ('-h','--help'):
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print help
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sys.exit()
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elif o in ('-l','--length'):
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n=float(a)
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elif o in ('-s','--steps'):
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k=int(a)
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#Show initial parameters
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print "Initial parameters"
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print "Steps per mm: %3d steps"%k
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print "Length extruded: %3d mm"%n
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print
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print "Serial port: %s"%port
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#Connect to printer
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print "Connecting to printer..",
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p=printcore(port,115200)
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print "connected."
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#Calibration loop
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while n!=m:
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p.send_now("G92 E0") #Reset e axis
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p.send_now("G1 E%d F100"%int(n)) #Extrude length of filament
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wait(t,'Extruding.. ')
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m=float_input("How many millimeters of filament were extruded? ")
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if n!=m:
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k=(n/m)*k
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p.send_now("M92 E%d"%int(round(k))) #Set new step count
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print "Steps per mm: %3d steps"%k #Tell user
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print 'Calibration completed.' #Yay!
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p.disconnect()
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