- added a new preprocessor: default_laser

- in the app added a new tool type: "L" (laser) which when selected will autoselect the `default_laser` preprocessor in Milling Plugin

preprocessors/default.py

@@ -19,7 +19,7 @@ class default(PreProc):
         units = ' ' + str(p['units']).lower()
         coords_xy = p['xy_toolchange']
         end_coords_xy = p['xy_end']
-        gcode = '(This preprocessor is the default preprocessor used by FlatCAM.)\n'
+        gcode = '(This preprocessor is the default preprocessor.)\n'
         gcode += '(It is made to work with MACH3 compatible motion controllers.)\n\n'
 
         xmin = '%.*f' % (p.coords_decimals, p['options']['xmin'])

preprocessors/default_laser.py

@@ -0,0 +1,130 @@
+# ##########################################################
+# FlatCAM: 2D Post-processing for Manufacturing            #
+# http://flatcam.org                                       #
+# File Author: Matthieu Berthomé                           #
+# Date: 5/26/2017                                          #
+# MIT Licence                                              #
+# ##########################################################
+
+from appPreProcessor import *
+
+
+class default_laser(PreProc):
+
+    include_header = True
+    coordinate_format = "%.*f"
+    feedrate_format = '%.*f'
+
+    def start_code(self, p):
+        units = ' ' + str(p['units']).lower()
+
+        gcode = '(This preprocessor is the default preprocessor when used with a laser.)\n'
+        gcode += '(It is made to work with MACH3 compatible motion controllers.)\n' \
+                 '(This preprocessor makes no moves on the Z axis it will only move horizontally.)\n' \
+                 '(The horizontal move is done with G0 - highest possible speed set in MACH3.)\n' \
+                 '(It assumes a manually focused laser.)\n' \
+                 '(The laser is started with M3 command and stopped with the M5 command.)\n\n'
+
+        xmin = '%.*f' % (p.coords_decimals, p['options']['xmin'])
+        xmax = '%.*f' % (p.coords_decimals, p['options']['xmax'])
+        ymin = '%.*f' % (p.coords_decimals, p['options']['ymin'])
+        ymax = '%.*f' % (p.coords_decimals, p['options']['ymax'])
+
+        gcode += '(Feedrate: ' + str(p['feedrate']) + units + '/min' + ')\n'
+        gcode += '(Steps per circle: ' + str(p['steps_per_circle']) + ')\n'
+
+        if str(p['options']['type']) == 'Excellon' or str(p['options']['type']) == 'Excellon Geometry':
+            gcode += '(Preprocessor Excellon: ' + str(p['pp_excellon_name']) + ')\n'
+        else:
+            gcode += '(Preprocessor Geometry: ' + str(p['pp_geometry_name']) + ')\n' + '\n'
+
+        gcode += '(X range: ' + '{: >9s}'.format(xmin) + ' ... ' + '{: >9s}'.format(xmax) + ' ' + units + ')\n'
+        gcode += '(Y range: ' + '{: >9s}'.format(ymin) + ' ... ' + '{: >9s}'.format(ymax) + ' ' + units + ')\n\n'
+
+        gcode += '(Laser Power - Spindle Speed: ' + str(p['spindlespeed']) + ')\n'
+        gcode += '(Laser Minimum Power: ' + str(p['laser_min_power']) + ')\n\n'
+
+        gcode += ('G20\n' if p.units.upper() == 'IN' else 'G21\n')
+        gcode += 'G90\n'
+        gcode += 'G94'
+
+        return gcode
+
+    def startz_code(self, p):
+        return ''
+
+    def lift_code(self, p):
+        if float(p.laser_min_power) > 0.0:
+            # the formatted text: laser OFF must always be like this else the plotting will not be done correctly
+            return 'M03 S%s (laser OFF)\n' % str(p.laser_min_power)
+        else:
+            return 'M05'
+
+    def down_code(self, p):
+        if p.spindlespeed:
+            return '%s S%s' % ('M03', str(p.spindlespeed))
+        else:
+            return 'M03'
+
+    def toolchange_code(self, p):
+        return ''
+
+    def up_to_zero_code(self, p):
+        return ''
+
+    def position_code(self, p):
+        # used in for the linear motion
+        # formula for skewing on x for example is:
+        # x_fin = x_init + y_init/slope where slope = p._bed_limit_y / p._bed_skew_x (a.k.a tangent)
+        if p._bed_skew_x == 0:
+            x_pos = p.x + p._bed_offset_x
+        else:
+            x_pos = (p.x + p._bed_offset_x) + ((p.y / p._bed_limit_y) * p._bed_skew_x)
+
+        if p._bed_skew_y == 0:
+            y_pos = p.y + p._bed_offset_y
+        else:
+            y_pos = (p.y + p._bed_offset_y) + ((p.x / p._bed_limit_x) * p._bed_skew_y)
+
+        return ('X' + self.coordinate_format + ' Y' + self.coordinate_format) % \
+               (p.coords_decimals, x_pos, p.coords_decimals, y_pos)
+
+    def rapid_code(self, p):
+        # a fast linear motion using the G0 command which means: "move as fast as the CNC can handle and is set in the
+        # CNC controller". It is a horizontal move in the X-Y CNC plane.
+        return ('G00 ' + self.position_code(p)).format(**p)
+
+    def linear_code(self, p):
+        # a linear motion using the G1 command which means: "move with a set feedrate (speed)".
+        # It is a horizontal move in the X-Y CNC plane.
+        return ('G01 ' + self.position_code(p)).format(**p)
+
+    def end_code(self, p):
+        # a final move at the end of the CNC job. First it moves to a safe parking Z height followed by an X-Y move
+        # to the parking location.
+        end_coords_xy = p['xy_end']
+        gcode = ''
+
+        if end_coords_xy and end_coords_xy != '':
+            gcode += 'G00 X{x} Y{y}'.format(x=end_coords_xy[0], y=end_coords_xy[1]) + "\n"
+        return gcode
+
+    def feedrate_code(self, p):
+        # set the feedrate for the linear move with G1 command on the X-Y CNC plane (horizontal move)
+        return 'G01 F' + str(self.feedrate_format % (p.fr_decimals, p.feedrate))
+
+    def z_feedrate_code(self, p):
+        # set the feedrate for the linear move with G1 command on the Z CNC plane (vertical move)
+        return 'G01 F' + str(self.feedrate_format % (p.fr_decimals, p.z_feedrate))
+
+    def spindle_code(self, p):
+        if p.spindlespeed:
+            return '%s S%s' % ('M03', str(p.spindlespeed))
+        else:
+            return 'M03'
+
+    def dwell_code(self, p):
+        return ''
+
+    def spindle_stop_code(self, p):
+        return 'M05'