Power testing gcode gen.py

#User defined variables
fileName = 'half depth Power testing.gcode'
fileFolder = 'Latest'
cutterDiameter = 3 #mm
depthOfCut = 3
 #mm 
plungeSpeed = 250 #mm/min
nominalTrenchGap = 5 #mm
numberOfTrenches = 6
trenchLength = 1200 #mm
spindleSpeed = 19000 #RPM
feed = 4000 #mm/min
appendSeedToFile = True #True or False

#Calculated variables
fileName = fileFolder + "/" + fileName
if appendSeedToFile:    
    fileName = fileName[:len(fileName)-6] + " " + str(spindleSpeed//1000) + "k.gcode"
gapBetweenLines = nominalTrenchGap + cutterDiameter

def addLine(variable, line):
    variable = variable + str(line) + "\n"
    return variable

def drawLine(dimension, direction, feedRate):
    gcode = ""
    feedRate = str(feedRate)
    dimension = str(dimension)
    if direction == 1: #0 = +X , 1 = -X
        dimension = "0"
    gcode = addLine(gcode, "G90G1 X" + dimension + "F" + feedRate)  
    return gcode

def moveOver(dimension, feed):
    gcode = ""
    dimension = str(dimension)
    feed = str(feed)
    gcode = addLine(gcode, "G90G1 Y" + dimension + "F" + feed)
    return gcode

    
#Write GCODE file
with open(fileName,"w+") as f:
    gcode = ""
    #MAIN CUT
    direction = 0
    gcode = addLine(gcode, "M3 S" + str(spindleSpeed) + "\nG90G0 X-5Y-5Z-2\nG90G0 X0Y0Z0") #Start spindle AND remove backlash
    gcode = addLine(gcode, "G90G1 Z" + str(-1*depthOfCut) + "F" + str(plungeSpeed)) # Plunge Z  

    gcode = addLine(gcode, "\n(MAIN CUT)")

    for i in range(numberOfTrenches):
        gcode = addLine(gcode, "(new trench)")

        gap = nominalTrenchGap * (i) + cutterDiameter * (i)
        gcode = addLine(gcode, moveOver(gap, feed))
        gcode = addLine(gcode, drawLine(trenchLength, direction, feed))
        direction = not(direction)     

    gcode = addLine(gcode, "G90G0 Z2") #Lift Z        
    gcode = addLine(gcode, "M5") #Stop spindle
    f.write(gcode)
f.close()

print(fileName + " written")