The TURRET Command [L]
The TURRET command is a non-standard[1] alias for the LOAD/TOOL command. This command is used to load and unload tools on lathes and mill-turn machines. The syntax of the TURRET command follows:
![\textbf{TURRET / } \mathit{tool\_id} \;
\Big[,\mathit{offset} \; \big[\mathit{,x\_shift,y\_shift}\,\big]\Big] \;
\big[,\mathtt{<\!tool\_information\!>}\,\big]](../../_images/math/3fb561dfc0a4c328fd20ae671cf0324fcd9d2817.svg)
The order of the first four parameters is fixed.
Specifies the tool to be loaded either by the pocket number in the tool changer, or by the tool identification number, as defined by the machine description responses in QUEST. Specify a tool_id of zero (0) to unload the tool, if supported by the machine. If the tool_id matches the tool currently loaded, then a tool change operation will not be generated. However, changes in tool length, tool offset and orientation will be respected.
![\big[,\mathit{offset}\,\big]](../../_images/math/366181f078175be4f58f86f04ade56f1a4fe25df.svg)
The offset parameter represents the cutter length compensation value. It is equivalent to the OSETNO option in the standard syntax.
![\big[\mathit{,x\_shift,y\_shift}\,\big]](../../_images/math/8b5962402aadea0447800be452b64e8068ae139a.svg)
The x and y shift parameters represent offsets from the tool tip to the turret control point. They are equivalent to the SETOOL option in the standard syntax.
For horizontal lathes, these will be applied to the Z and X machine axes respectively if no ORIGIN matrix has been coded. For vertical lathes they will be applied to the X and Z-axes respectively (once again, assuming no ORIGIN matrix is in effect).
An important consideration with regard to the use of TURRET startup macro $P arguments for tool offsets is the following: The $P arguments of the TURRET startup refer to X,Y and Z machine axis offsets from the turret control point to the tool tip and not the other way around. In effect, when x and y shift values are coded, they are first applied to the appropriate machine axes and then they are negated before being loaded into the $P machine offset locations. Note that these $P offset locations are also loaded by SETOOL,xt,yt,zt parameter values.
![\big[,\mathtt{<\!tool\_information\!>}\,\big]](../../_images/math/863c9c27d3473f8c678a788d4a129de6b2949621.svg)
See the TOOLNO command for a description of the tool information parameters. See the LOAD/TOOL command for more information on loading tools.