HEIDENHAIN TNC 426 (280 476) Pilot - Manual (Page 43)

44
Cycles
for
Machining
Holes
and
Threads
COUNTERBORE BACK (204)
• The machine and TNC must be prepared for the
COUNTERBORE BACK cycle by the machine tool builder!
• This cycle requires a position-controlled spindle!
• Danger of collision! Select the disengaging direction that
gets the tool clear of the counterbore floor!
• Use this cycle only with a reverse boring bar!
CYCL DEF: Select Cycle 204 COUNTERBORE BACK
Set-up clearance: Q200
Depth of counterbore: Q249
Material thickness: Q250
Tool edge off-center distance: Q251
Tool edge height: Q252
Feed rate for pre-positioning: Q253
Feed rate for counterboring: Q254
Dwell time at counterbore floor: Q255
Workpiece surface coordinate: Q203
2nd set-up clearance: Q204
Disengaging direction (0/1/2/3/4): Q214
Angle for oriented spindle stop: Q336