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#!/usr/bin/env python
# -*- coding: utf-8 -*-
# copyright 2014 Hamilton Kibbe <ham@hamiltonkib.be>
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
# http://www.apache.org/licenses/LICENSE-2.0
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
from .utils import write_gerber_value
__all__ = ['ExcellonTool', 'CommentStmt', 'HeaderBeginStmt', 'HeaderEndStmt',
]
class ExcellonStatement(object):
""" Excellon Statement abstract base class
"""
def to_excellon(self):
pass
class ExcellonTool(ExcellonStatement):
""" Excellon Tool class
Parameters
----------
settings : FileSettings (dict-like)
File-wide settings.
kwargs : dict-like
Tool settings from the excellon statement. Valid keys are:
diameter : Tool diameter [expressed in file units]
rpm : Tool RPM
feed_rate : Z-axis tool feed rate
retract_rate : Z-axis tool retraction rate
max_hit_count : Number of hits allowed before a tool change
depth_offset : Offset of tool depth from tip of tool.
Attributes
----------
number : integer
Tool number from the excellon file
diameter : float
Tool diameter in file units
rpm : float
Tool RPM
feed_rate : float
Tool Z-axis feed rate.
retract_rate : float
Tool Z-axis retract rate
depth_offset : float
Offset of depth measurement from tip of tool
max_hit_count : integer
Maximum number of tool hits allowed before a tool change
hit_count : integer
Number of tool hits in excellon file.
"""
@classmethod
def from_line(cls, line, settings):
""" Create a Tool from an excellon file tool definition line.
Parameters
----------
line : string
Tool definition line from an excellon file.
settings : FileSettings (dict-like)
Excellon file-wide settings
Returns
-------
tool : Tool
An ExcellonTool representing the tool defined in `line`
"""
commands = re.split('([BCFHSTZ])', line)[1:]
commands = [(command, value) for command, value in pairwise(commands)]
args = {}
format = settings['format']
zero_suppression = settings['zero_suppression']
for cmd, val in commands:
if cmd == 'B':
args['retract_rate'] = parse_gerber_value(val, format, zero_suppression)
elif cmd == 'C':
args['diameter'] = parse_gerber_value(val, format, zero_suppression)
elif cmd == 'F':
args['feed_rate'] = parse_gerber_value(val, format, zero_suppression)
elif cmd == 'H':
args['max_hit_count'] = parse_gerber_value(val, format, zero_suppression)
elif cmd == 'S':
args['rpm'] = 1000 * parse_gerber_value(val, format, zero_suppression)
elif cmd == 'T':
args['number'] = int(val)
elif cmd == 'Z':
args['depth_offset'] = parse_gerber_value(val, format, zero_suppression)
return cls(settings, **args)
def from_dict(cls, settings, tool_dict):
return cls(settings, tool_dict)
def __init__(self, settings, **kwargs):
self.settings = settings
self.number = kwargs.get('number')
self.feed_rate = kwargs.get('feed_rate')
self.retract_rate = kwargs.get('retract_rate')
self.rpm = kwargs.get('rpm')
self.diameter = kwargs.get('diameter')
self.max_hit_count = kwargs.get('max_hit_count')
self.depth_offset = kwargs.get('depth_offset')
self.hit_count = 0
def to_excellon(self):
fmt = self.settings['format']
zs = self.settings['zero_suppression']
stmt = 'T%d' % self.number
if self.retract_rate:
stmt += 'B%s' % write_gerber_value(self.retract_rate, fmt, zs)
if self.diameter:
stmt += 'C%s' % write_gerber_value(self.diameter, fmt, zs)
if self.feed_rate:
stmt += 'F%s' % write_gerber_value(self.feed_rate, fmt, zs)
if self.max_hit_count:
stmt += 'H%s' % write_gerber_value(self.max_hit_count, fmt, zs)
if self.rpm:
if self.rpm < 100000.:
stmt += 'S%s' % write_gerber_value(self.rpm / 1000., fmt, zs)
else:
stmt += 'S%g' % self.rpm / 1000.
if self.depth_offset:
stmt += 'Z%s' % write_gerber_value(self.depth_offset, fmt, zs)
return stmt
def _hit(self):
self.hit_count += 1
def __repr__(self):
unit = 'in.' if self.settings.units == 'inch' else 'mm'
return '<ExcellonTool %d: %0.3f%s dia.>' % (self.number, self.diameter, unit)
class CommentStmt(ExcellonStatement):
def __init__(self, comment):
self.comment = comment
def to_excellon(self):
return ';%s' % comment
class HeaderBeginStmt(ExcellonStatement):
def __init__(self):
pass
def to_excellon(self):
return 'M48'
class HeaderEndStmt(ExcellonStatement):
def __init__(self):
pass
def to_excellon(self):
return 'M95'
class RewindStopStmt(ExcellonStatement):
def __init__(self):
pass
def to_excellon(self):
return '%'
class EndOfProgramStmt(ExcellonStatement):
def __init__(self, x=None, y=None):
self.x = x
self.y = y
def to_excellon(self):
stmt = 'M30'
if self.x is not None:
stmt += 'X%s' % write_gerber_value(self.x)
if self.y is not None:
stmt += 'Y%s' % write_gerber_value(self.y)
class UnitStmt(ExcellonStatement):
def __init__(self, units='inch', zero_suppression='trailing'):
self.units = units.lower()
self.zero_suppression = zero_suppression
def to_excellon(self):
stmt = '%s,%s' % ('INCH' if self.units == 'inch' else 'METRIC',
'LZ' if self.zero_suppression == 'trailing' else 'TZ')
class IncrementalModeStmt(ExcellonStatement):
def __init__(self, mode='off'):
if mode.lower() not in ['on', 'off']:
raise ValueError('Mode may be "on" or "off")
self.mode = 'off'
def to_excellon(self):
return 'ICI,%s' % 'OFF' if self.mode == 'off' else 'ON'
class VersionStmt(ExcellonStatement):
def __init__(self, version=1):
self.version = int(version)
def to_excellon(self):
return 'VER,%d' % self.version
class FormatStmt(ExcellonStatement):
def __init__(self, format=1):
self.format = int(format)
def to_excellon(self):
return 'FMAT,%d' % self.format
class LinkToolStmt(ExcellonStatement):
def __init__(self, linked_tools):
self.linked_tools = [int(x) for x in linked_tools]
def to_excellon(self):
return '/'.join([str(x) for x in self.linked_tools])
class MeasuringModeStmt(ExcellonStatement):
def __init__(self, units='inch'):
units = units.lower()
if units not in ['inch', 'metric']:
raise ValueError('units must be "inch" or "metric"')
self.units = units
def to_excellon(self):
return 'M72' if self.units == 'inch' else 'M71'
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