Detailed description
2.1 Path feedrate F
Basic logic functions: Feeds (V1)
Function Manual, 11/2006, 6FC5397-0BP10-2BA0
29
Smoothed actual values
If lowresolution encoders are being used, smoothed actual values can be applied for
constant coupled path and axis motions.
Machine data:
MD34990 ENC_ACTVAL_SMOOTH_TIME
can be used to change the time constant for more effectively smoothed actual values for:
• Thread cutting with feedrate for G33, G34, G35
• Revolutional feedrate for G95, G96, G97, FRAPON
• Display of actual positions and actual speed/velocity
The larger the time constant, the better the smoothing of the actual values and the longer the
overtravel.
2.1.5 Feedrate for G331/G332, rigid tapping
Application
G331 (tapping) and G332 (tapping retraction) can be used to tap a thread without a
compensating chuck (rigid tapping) if the spindle is technically capable of operating in
position control mode.
Speed S, feedrate F, thread lead
A revolutional feedrate [mm/revolution] is used for G331and G332. The revolutional feedrate
is defined by programming the thread lead increase [mm/revolution].
The speed of the axes for the thread length is calculated from the programmed spindle
speed S and the thread lead.
Feedrate F [mm/min] = speed S [rev/min] * thread lead [mm/rev]
Note
For further information about programming G63/G331/G332, please see:
References:
/PG/ Programming Guide, Fundamentals
/PAZ/ Programming Guide, Cycles
Inhibiting stop events for G331/G332
During tapping, a stop can be prevented if the block contains a path movement or a G4.
For this purpose, bit 0 must be set to 0 in machine data:
MD11550 $MN_STOP_MODE_MASK.
The stop, which was activated previously, is possible again after G331/G332 has been
executed.
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