189 lines
4.8 KiB
Python
Executable File
189 lines
4.8 KiB
Python
Executable File
#!/usr/bin/env python
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# This file is for preprocessing gcode and the new G29 Autobedleveling from Marlin
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# It will analyse the first 2 Layer and return the maximum size for this part
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# After this it will replace with g29_keyword = ';MarlinG29Script' with the new G29 LRFB
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# the new file will be created in the same folder.
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from __future__ import print_function
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# your gcode-file/folder
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folder = './'
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my_file = 'test.gcode'
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# this is the minimum of G1 instructions which should be between 2 different heights
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min_g1 = 3
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# maximum number of lines to parse, I don't want to parse the complete file
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# only the first plane is we are interested in
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max_g1 = 100000000
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# g29 keyword
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g29_keyword = 'g29'
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g29_keyword = g29_keyword.upper()
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# output filename
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output_file = folder + 'g29_' + my_file
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# input filename
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input_file = folder + my_file
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# minimum scan size
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min_size = 40
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probing_points = 3 # points x points
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# other stuff
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min_x = 500
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min_y = min_x
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max_x = -500
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max_y = max_x
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last_z = 0.001
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layer = 0
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lines_of_g1 = 0
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gcode = []
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# return only g1-lines
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def has_g1(line):
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return line[:2].upper() == "G1"
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# find position in g1 (x,y,z)
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def find_axis(line, axis):
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found = False
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number = ""
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for char in line:
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if found:
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if char == ".":
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number += char
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elif char == "-":
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number += char
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else:
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try:
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int(char)
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number += char
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except ValueError:
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break
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else:
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found = char.upper() == axis.upper()
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try:
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return float(number)
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except ValueError:
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return None
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# save the min or max-values for each axis
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def set_mima(line):
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global min_x, max_x, min_y, max_y, last_z
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current_x = find_axis(line, 'x')
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current_y = find_axis(line, 'y')
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if current_x is not None:
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min_x = min(current_x, min_x)
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max_x = max(current_x, max_x)
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if current_y is not None:
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min_y = min(current_y, min_y)
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max_y = max(current_y, max_y)
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return min_x, max_x, min_y, max_y
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# find z in the code and return it
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def find_z(gcode, start_at_line=0):
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for i in range(start_at_line, len(gcode)):
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my_z = find_axis(gcode[i], 'Z')
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if my_z is not None:
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return my_z, i
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def z_parse(gcode, start_at_line=0, end_at_line=0):
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i = start_at_line
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all_z = []
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line_between_z = []
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z_at_line = []
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# last_z = 0
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last_i = -1
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while len(gcode) > i:
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try:
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z, i = find_z(gcode, i + 1)
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except TypeError:
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break
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all_z.append(z)
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z_at_line.append(i)
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temp_line = i - last_i -1
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line_between_z.append(i - last_i - 1)
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# last_z = z
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last_i = i
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if 0 < end_at_line <= i or temp_line >= min_g1:
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# print('break at line {} at height {}'.format(i, z))
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break
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line_between_z = line_between_z[1:]
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return all_z, line_between_z, z_at_line
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# get the lines which should be the first layer
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def get_lines(gcode, minimum):
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i = 0
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all_z, line_between_z, z_at_line = z_parse(gcode, end_at_line=max_g1)
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for count in line_between_z:
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i += 1
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if count > minimum:
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# print('layer: {}:{}'.format(z_at_line[i-1], z_at_line[i]))
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return z_at_line[i - 1], z_at_line[i]
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with open(input_file, 'r') as file:
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lines = 0
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for line in file:
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lines += 1
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if lines > 1000:
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break
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if has_g1(line):
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gcode.append(line)
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file.close()
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start, end = get_lines(gcode, min_g1)
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for i in range(start, end):
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set_mima(gcode[i])
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print('x_min:{} x_max:{}\ny_min:{} y_max:{}'.format(min_x, max_x, min_y, max_y))
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# resize min/max - values for minimum scan
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if max_x - min_x < min_size:
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offset_x = int((min_size - (max_x - min_x)) / 2 + 0.5) # int round up
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# print('min_x! with {}'.format(int(max_x - min_x)))
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min_x = int(min_x) - offset_x
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max_x = int(max_x) + offset_x
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if max_y - min_y < min_size:
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offset_y = int((min_size - (max_y - min_y)) / 2 + 0.5) # int round up
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# print('min_y! with {}'.format(int(max_y - min_y)))
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min_y = int(min_y) - offset_y
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max_y = int(max_y) + offset_y
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new_command = 'G29 L{0} R{1} F{2} B{3} P{4}\n'.format(min_x,
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max_x,
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min_y,
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max_y,
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probing_points)
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out_file = open(output_file, 'w')
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in_file = open(input_file, 'r')
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for line in in_file:
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if line[:len(g29_keyword)].upper() == g29_keyword:
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out_file.write(new_command)
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print('write G29')
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else:
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out_file.write(line)
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file.close()
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out_file.close()
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print('auto G29 finished')
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