Jung J630D, Manual

Page: 67 / 316

J630D
4. Functional description of the operating modes 26.7.02 61
4.3 Semi-automatic mode
• Set the key switch to semi-automatic mode (31).
4.3.1 Control functions and restrictions
4.3.1.1 Switching the grinding spindle motor on
• Press key 3 (grinding spindle motor ON) on the machine control unit. See
section 3.2 “Machine control unit” on page 51.
– The grinding spindle rotates at the programmed peripheral speed. Conditi-
on: The override switch (1) must be set to 100 %.
• All axis motions can be executed in semi-automatic mode with the
guard door open. You must start each axis motion and any other
control functions individually by hand. As the operator / person
responsible for the machine, you should remain aware of the risks
of working in this mode at all times. Please bear the potential
hazards and the safety regulations in mind while working on the
machine.
• When you probe a workpiece, do not approach it with increments
which are too large, as this entails a number of risks:
• The probing operation may not be sufficiently exact,
• The grinding wheel may be knocked and damaged (it could burst
apart),
• The grinding spindle may be damaged,
• The workpiece may fly out of the magnetic chuck or the clamping
fixture or
• Wheel particles are catapulted out of the machine's working enve-
lope.
If the grinding spindle drive is optionally equipped for cutting
speeds of more than 114.8 ft/s, you must carry out the following pro-
cedure in order to set these high speeds:
• First reset the key switch to the position for high cutting speeds.
•
Then press key 3 (grinding spindle motor ON) twice.