Operation Start for Tapping in NX Post

[Trevz87]

thread561-177672

Hi,

I have the same issue as in the referenced thread and it seems the original question was never fully answered. In our case I would like to have a different operation start and op end for tapping(if possible)- I like to use G95 so the the operator is looking at the thread pitch rather than a random feed number based on the spindle speed.

Thanks

 

[Bugie]

You will need some TCL code, Something like

#=============================================================
proc PB_CMD_tap_start { } {
#=============================================================
# this command used with PCB_CMD_tap_start and PCB_CMD_tap_start
# will output an M and s code before tapping cycles
# put this command in the above the cycle ouput blocks
# in "tap" event


global mom_spindle_speed tap_set

if { $tap_set == "OFF" } {
MOM_output_literal "G95 (FPR)"
MOM_output_literal "M135 S[format %0.0f $mom_spindle_speed]"
set tap_set "ON"
}
}

Regards
Greg

 

[Trevz87]

Thanks Greg,

I'm sure that's close - but I'm still learning post builder and still very green with Tcl. I have the command above the G84 output(in the same block) but I still get the error in the attached screenshot. I've tried to figure it out but I'm not having much success. Could you possibly have a look? Help is much appreciated.

NX9.01

 

[joycejo]

It looks like you only have part of the solution. You also need a User Defined Event (UDE) to pass the value of $tap_set to the postprocessor. I would highly recommend reading the help doc's on the post and creating UDE's
There is a section on UDE creation

There is a lot of information available from the PLM World website from previous user group presentations that cover creating and modifying posts.

http://www.plmworld.org

membership is free to current customers of NX.



John Joyce
N.C. Programming Supervisor
Barnes Aerospace, Windsor CT
NX6, NX7.5,NX8.5, NX9.0
Vericut7.3

 

[Bugie]

Add this to the start of program

#=============================================================
proc PB_CMD_tap_initialise { } {
#=============================================================
# this command used with PCB_CMD_tap_start and PCB_CMD_tap_end
# will output an M and s code before tapping cycles
# put this command in the "start of program" event
# Also this will initialise the coolant dwell

global tap_set

set tap_set "OFF"
}

and this bit
#=============================================================
proc PB_CMD_tap_end { } {
#=============================================================
# this command used with PCB_CMD_tap_initialise and PCB_CMD_tap_start
# will output an M and s code before tapping cycles
# put this command in the "cycle off" event


global mom_spindle_speed tap_set

if { $tap_set == "ON" } {
MOM_output_literal "G94 (FPM)"
set tap_set "OFF"
}
}

Regards
Greg