Half spherical orbiting

Process control by PLC

Down channel	Orbit channel	Escape channel	Escape condition
V_prog	V_prog, start / stop	V_ext	V_ext < 0 and escape (& orbit channels) stopped

In half spherical orbiting, the down channel moves at a constant velocity. Another difference compared to star orbiting is that the down geometry has both a sector in the positive radius direction and one in the negative radius direction.

The example program uses the same contour in the down channel as for star orbiting erosion. However, a real-time loop is also used instead of a normal loop. This offers flexibility to increase or decrease the number of loops depending on the progress of the process.

Programing Example

Down channel - half spherical orbiting

% Half spherical orbiting

N0270 #RT CYCLE DELETE [ID =4711 ] ; Define the real-time loops

N0280 #RT CYCLE [ID=4711 SCOPE = GLOBAL]

N0290 $IF V.E.RtLoopEnable != 0

N0300 V.RTG.LOOP.ENABLED = TRUE

N0310 $ELSE

N0320 V.RTG.LOOP.ENABLED = FALSE

N0330 $ENDIF

N0340 #RT CYCLE END

N0350 #FLUSH WAIT

N0360 G19

#RT WHILE

N0410 G01 X0 Y0 Z30 F1000 ; down

N0420 G03 Y30 Z60 J0 K30 ; expand radius in positive direction

N0430 G01 Z70

N0440 G01 Z60

N0450 G02 Y0 Z30 J-30 K0 ; move back to centre

N0360 #OPTIONAL EXECUTION ON [SIMULATE] ; optional change to the next disc position

N0370 #SIGNAL SYN [ID "S-PlanetarySectorReq" CH2] ; signal for orbit channel to move to the next position

N0380 #WAIT SYN [ID "S-PlanetarySectorOk" CH2] ; wait until orbit channel is in position

N0390 #OPTIONAL EXECUTION OFF

N0460 G02 Y-30 Z60 J0 K30 ; expand radius in negative direction

N0470 G01 Z70

N0480 G01 Z60

N0490 G03 Y0 Z30 J30 K0 ; move back to centre

N0500 #RT ENDWHILE

N0550 G01 Y0 F100 ; end machining

N0560 M17

Programing Example

Orbit channel - half spherical orbiting

%L channel_sync

N2000 #SIGNAL SYN[ID "S-PlanetarySectorOk" CH1]

N2010 #WAIT SYN[ID "S-PlanetarySectorReq" CH1]

N2020 M17

N2180 $WHILE 1

N2190 #WAIT SYN[ID "S-PlanetarySectorReq" CH1]

N2200 G01 XP1 Y-P2 F2000

N2210 LL channel_sync

N2220 X-P1

(-- divided orbit geometry --)

N0400 ...

N2410 #SIGNAL SYN[ID "S-PlanetarySectorOk" CH1]

N2420 $ENDWHILE