Siemens SINUMERIK 840D sl Commissioning Manual page 146

9 Additional Functions
9.6 Counter–spindle
Dimensions
Machine
manufacturer cycle
Simulation
9-146
The cut–off is successful if travel to fixed stop fails. Alarms 20091 "Axis %1 did
not reach fixed stop" and 20094 "Axis %1 function was aborted" must therefore
be deactivated in the machine data:
37050 $MA_FIXED_STOP_ALARM_MASK = 2
This machine data must be set in the "Machine data" mask in operating area
"Tools – zero offset" This machine data is contained in machine data set ST.8x0;
you need to adapt it to the specific axis.
If, however, the specified force was achieved during the cut–off control (i.e.
travel to fixed stop was successful), alarm 61255 "Error at cut–off: Tool break?"
is issued.
Note
The "Travel to fixed stop" function can also be used when gripping the spindle
(see above). If travel to fixed stop does not succeed when gripping, an alarm
will of course also be issued. Instead of alarms 20091 and 20094 the alarm
61254 "Error during travel to fixed stop" will be issued.
To define the reference point for moving the counter–spindle, you must first in-
form the counter–spindle of the dimensions. You can either enter the dimen-
sions in the following machine data or in the menu "Tools – zero offset" → ">" →
"Spindles". Changes to the machine data automatically become effective in the
menu and vice versa.
9829 $MM_ST_SPINDLE_CHUCK_TYPES: Spindle chuck selection
9831 $MM_ST_SPINDLE_PARA_ZL1: Chuck dimensions for counter–spindle
9832 $MM_ST_SPINDLE_PARA_ZL2: Stop dimension for counter–spindle
9833 $MM_ST_SPINDLE_PARA_ZL2: Jaw dimension for counter–spindle
If you would like to perform one of the following actions, you need to adapt the
machine manufacturer cycle ST_CUST.SPF (see section 11.2 "Machine
manufacturer cycles):
S
Switch between spindle and C axis mode for the main spindle or counter–
spindle
S
Open, close, flush chuck (main spindle/counter–spindle)
S
Change default settings for the main spindle and counter–spindle
If your programming includes M functions to open or close the chuck on the
main spindle or counter–spindle, the simulation will only display these actions if
you observe the following:
In the machine data you must assign the M functions to cycles which will then
perform the appropriate function.
The functions performed by individual cycles are listed in the table below:
SINUMERIK 840D sl Commissioning Manual CNC: ShopTurn – 11/2006 Edition
© Siemens AG 2006 All Rights Reserved
11/2006