Siemens SINUMERIK 840D sl Operating Manual page 216

Programming technology functions
9.3 Form-truing (CYCLE495)
You have the option of form-truing either parallel with the axis or parallel with the contour:
● For form-truing parallel with the contour, the contour is moved along with each stroke.
Taking into account the unmachined part (blank), contour segments can be omitted while
machining.
● For form-truing in parallel to the axis, the form is established through longitudinal cuts
parallel to the machining axis.
Form-truing can be interrupted, and continued again at the point of interruption. However,
between stopping and continuing, no additional form-truing may be started, no wheel changed
and no power on carried out.
The actual form-truing allowance is saved to the channel-specific GUD variables
S_GC_CONT_R[2] for diagnostic purposes/progress display and for continuing after an
interruption.
Sequence
Main program:
● Selection of the dressing tool coordinate system
– with CYCLE435 (Page 212)(,,,) or
– with OEM or end user cycle
● Prepositioning, dressing tool
The position of the dressing tool should be selected so that the tool can approach the
grinding wheel for form-truing without any risk of collision.
● Contour call with CYCLE62(,,,) (Page 210)
With the contour call, the form of the grinding wheel is transferred to the form-truing cycle.
● Form-truing with CYCLE495(,,,)
The grinding wheel form is trued using CYCLE495.
● Deselection of the dressing tool coordinate system
– with CYCLE435 (Page 212)(,,,) or
– with OEM or end user cycle
Example
;*Main program
T="WHEEL" D1
CYCLE435("WHEEL",1,"DRESSER_6",1,0,0,10,10,0,0,0)
G0 X10
Z-40
CYCLE62("CONTOUR",0,,)
CYCLE495("WHEEL",1,.5,100,131,0.01,,,0.345,100,0,11,90,85)
CYCLE435()
M30
;*
216
As a consequence, a dressing tool must be selected as active tool.
Operating Manual, 05/2017, A5E40869190
Grinding