148
FUNCTIONS
96-8000
June 1999
4.5 TOOL FUNCTIONS (TNN)
The Tnn code is used to select the next tool to be placed in the spindle from the tool changer. The T address
does not start the tool change operation; it only selects which tool will be used next. M06 and M16 are used to
start a tool change operation. The Tnn does not need to be in a block prior to the M06 or M16; it can be in the
same block.
NOTE: There is no X or Y motion required prior to performing a tool change and it would
waste time in most cases to return X or Y to the home position. However, if your
work piece or fixture is quite large, you may need to position X or Y prior to a
tool change in order to prevent a crash between the tools and your fixture.
Other controls may require the programmer to position the Z-axis to machine zero prior to a tool change but
this is not required with this control. You may command a tool change with X, Y, and Z in any position and the
control will bring the Z up to the machine zero position prior to starting the tool change. The control will move
the Z to a position above machine zero during a tool change but will never move below machine zero. At the
end of a tool change, the Z-axis will be at machine zero.
The tool changer is an all electric fixed shuttle type. Tools are always loaded through the spindle and should
never be installed directly in the carousel in order to avoid crashes. The pocket open to the spindle must
always be empty in the retracted position.
The tool holders used are #40 taper, V flange, commonly called îš“CT 40îš”. The tool changer is manufactured to
hold either BT40 or CAT40 tools. They are NOT interchangeable. For the 50 taper spindle option, the tool
holders used are CT #50 taper, V flange, commonly called îš“CT 50îš”.
For machines equipped for CAT40 tools, use a îš“45 degree, P40T type 1, inch threadsîš” pull stud built to JMTBA
standard îš“MAS 403-1982îš”. This pull stud is characterized by a long shaft and a 45 degree shoulder under the
head. Do not use the short shaft or pull studs with a sharp right angle (90 degree) head as they will not work
and will cause serious damage.
For machines equipped for BT40 tools, use only HAAS pull studs (PN: 20-7165).
Tool holders and pull studs must be in good condition and tightened together with wrenches or they may stick
in the spindle taper. Clean the tool tapers with a lightly oiled rag to leave a film to prevent rusting. Tools that
make a loud bang when being released indicate a problem and should be checked before serious damage to
the shuttle occurs. When the TOOL RELEASE button is pressed the tool should be pushed out of the spindle
by a small amount (approximately .07 Inch). This is an indication that the pull stud is correctly touching the
release mechanism.
Low air pressure or insufficient volume will reduce the pressure applied to the tool unclamp piston and will slow
down tool change time or will not release the tool.
CAUTION! If machine is equipped with the optional 50 taper spindle, follow these
guidelines:
îš• 25 lb. maximum per tool, and 300 lb. maximum total tool weight.
îš• Extremely heavy tool weights should be distributed evenly.
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