Mitsubishi FREQROL-SF Troubleshooting Manual page 124

Phenomenon
The load is heavy and
the spindle stops dur-
ing tapping operation.
4
4.3 Notes
1) When the spindle is driven by a belt in the semi-close
type (which does not use a spindle encoder), due to
slippage of belt, it is difficult to perform accurate
tapping operation.
In the case of belt driving type, use a spindle encoder
and perform the synchronous tapping operation using
the spindle encoder.
ratio of 2 to 1 in the closed type (which uses the
spindle encoder), set the spindle parameter PGC to
a value which is double of axis specification A axis
tap-g.
Set the spindle parameter s-gear to 1.
Remedy
5) The lower hole is shallow and
cutting chip is not correctly
removed.
correctly removed is used.
1) Set the spindle parameter 0RS2
bit B to 1 to select strong
excitation.
2) Increase the speed loop gain.
Increase the spindle parameters
magnification).