Delta Tau GEO BRICK LV User Manual

 

CLEAR  

 

; To erase old version when sending new 

RAPID  

 

; First actual line of program 

I5193=$2000 

RETURN 

G01 – Linear Interpolation Mode 

Typically, this code is implemented in PMAC through use of the LINEAR command.  The simplest 
implementation of this is N01000 LINEAR RETURN.  If feedrate override is desired, and it could have 
been disabled in RAPID mode, the subroutine should set the time- base source address variable to the 
register containing the external information (e.g. I193=$350A). 

G02 – 2D Clockwise Arc Mode 

Typically, this code is implemented in PMAC through use of the CIRCLE1 command.  The simplest 
implementation of this is N02000 CIRCLE1 RETURN.  If feedrate override is desired, and it could 
have been disabled in RAPID mode, the subroutine should set the time- base source address variable to 
the register containing the external information (e.g. I193=$350A). 

G03 – 2D Counterclockwise Arc Mode 

Typically, this code is implemented in PMAC through use of the CIRCLE2 command.  The simplest 
implementation of this is N02000 CIRCLE2 RETURN.  If feedrate override is desired, and it could 
have been disabled in RAPID mode, the subroutine should set the time- base source address variable to 
the register containing the external information (e.g. I193=$350A). 

G04 – Dwell Command 

This code requires the use of the READ command.  Different dialects of G-codes have the dwell time after 
a P or after an X.  PMAC can handle either; just use a READ(P) or a READ(X) as appropriate; the P-
value would be place in Q116, and the X-value would be placed in Q124.  Also, the units of time must be 
considered.  PMAC dwell units are in milliseconds.  If the G04 units are seconds, the value passed must 
be multiplied by 1000.  A typical implementation would be N04000 READ(P) 
DWELL(Q116*1000) RET. 

G09 – Exact Stop 

In some dialects of G-code, this code causes a stop between two moves so that no corner-rounding 
blending between the moves is done.  In PMAC, this can be implemented simply by executing a short 
dwell.  A typical implementation would be N09000 DWELL10 RET. 

G17, G18, G19 – Select Plane 

These codes select the plane in which circular interpolation and cutter radius compensation will be done.  
G17 selects the XY plane, G18 selects the ZX plane, and G19 selects the YZ plane.   In PMAC, this is 
performed by the NORMAL command, which specifies the vector normal to this plane (and is not limited 
to these choices).  The standard Turbo PMAC implementation of these codes would be: 

N17000 NORMAL K-1 

RETURN 

N18000 NORMAL J-1 

RETURN 

N19000 NORMAL I-1 

RETURN 

It is important here that the RETURN command be on a separate line; otherwise when PMAC returns to 
the line that called the subroutine, the NORMAL command would try to “pick up” more arguments from 
that line.