Line number in program

[TurBoss]

Hello,

I'm trying to process a program that contains N codes at the begining of each line

while trying to process the block in the machine
an error is raised

self.machine.process_block(line.block)

/usr/bin/python2.7 /home/turboss/Sources/hazzy/hazzy/modules/kremlin/kremlin.py
Traceback (most recent call last):
  File "/home/turboss/Sources/hazzy/hazzy/modules/kremlin/kremlin.py", line 395, in <module>
    main()
  File "/home/turboss/Sources/hazzy/hazzy/modules/kremlin/kremlin.py", line 386, in main
    kremlin.draw_path()
  File "/home/turboss/Sources/hazzy/hazzy/modules/kremlin/kremlin.py", line 332, in draw_path
    self.add_points(line, points)
  File "/home/turboss/Sources/hazzy/hazzy/modules/kremlin/kremlin.py", line 370, in add_points
    self.machine.process_block(line.block)
  File "/home/turboss/Sources/hazzy/hazzy/modules/pygcode/machine.py", line 471, in process_block
    self.process_gcodes(*block.gcodes, modal_params=block.modal_params)
  File "/home/turboss/Sources/hazzy/hazzy/modules/pygcode/machine.py", line 452, in process_gcodes
    modal_gcode = self.modal_gcode(modal_params)
  File "/home/turboss/Sources/hazzy/hazzy/modules/pygcode/machine.py", line 422, in modal_gcode
    ' '.join(str(x) for x in unasigned_words), self.mode
hazzy.modules.pygcode.exceptions.MachineInvalidState: modal parameters 'N10' cannot be assigned when in mode: <Mode: G00 G17 G90 G91.1 G94 G21 G40 G49 G54 G61 G97 M05 M09 F0 S0 T0>
N10 (HAZZY SPLASH G-CODE)

I was trying to figure what is wrong but failed

Thanks this project is great

[fragmuffin]

@TurBoss thanks for the issue!

My CAM software doesn't generate line numbers, so I hadn't picked this problem up yet.

Workaround

define the following class (anywhere)

import pygcode    

class GCodeLineNumber(pygcode.gcodes.GCode):
    @classmethod
    def word_matches(cls, w):
        return w.letter == 'N'
    word_letter = 'N'
    word_value_configurable = True
    exec_order = 0

but before that works, you'll have to modify a line in gcode.py from:

if (not exhaustive) and (word.letter not in 'GMFST'):

to

if (not exhaustive) and (word.letter not in 'GMFSTN'):

If you're interested

The issue is that the parser pulls all words (<letter><number>) out of the gcode string, then attempts to bind them as parameters to the closest valid gcode to the left of it.
Anything that remains (in your case, N10) is considered to be a parameter to a modal motion gcode (eg: G0)...
So what this is saying is that G0 N10 isn't a valid code, which it isn't... but that's because I haven't assigned N codes to be their own dummy gcode.

I'll be releasing v0.1.3 very soon to fix this, and some other issues.

[fragmuffin]

correction: make that v 0.2.0, I'll move this lib to alpha

[fragmuffin]

ok, new version is out... let me know if you have any more troubles.

[TurBoss]

Thank yo so much