
B–62073E–1/04 2. INTERFACE BETWEEN CNC AND PMC–NA OR NB
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Rewriting programmable parameters cannot change the spindle parameter.
(iii) Spindle positioning
Four gear stages can be used: the first, second, third, and fourth gears.
Set the same value in gear select signals CTH1A and CTH2A as in the conventional gear select
signals (GS1, GS2, GS4).
The servo loop gain for each gear stage should be specified in a parameter from 3000 to 3999.
The speed at which the tool moves cannot be specified for a reference position return (orienta-
tion). The speed varies with the distance from the current position of the tool to the reference posi-
tion.
The direction for a reference position return should be specified in a parameter from 3000 to 3999.
Tool drift is not compensated for.
Grid shift should be specified using a parameter from 3000 to 3999.
Spindle positioning cannot be performed during the remote buffer operation (binary format opera-
tion).
Neither pitch error nor backlash can be corrected.
(iv) Rigid tapping
Four gear stages can be used: the first, second, third, and fourth gears.
Set the same value in gear select signals CTH1A and CTH2A as in the conventional gear select
signals (GS1, GS2, GS4).
The servo loop gain for each gear stage should be specified in a parameter from 3000 to 3999.
The servo loop gain specified for each gear stage should also be set for the spindle and the drilling
axis.
The conventional parameter (5753) is invalid.
(v) Detecting the spindle fluctuation
Four gear stages can be used: the first, second, third, and fourth gears.
Set the same value in gear select signals CTH1A and CTH2A as in the conventional gear select
signals (GS1, GS2, GS4).
(vi) Stored pitch error compensation, straightness compensation, and inclination compensation
These functions are invalid for the spindle contour control axis.
(vii)Index table indexing
The index table axis is not subject to spindle contour control.
(f) Others
(i) Position coder
A parameter (PDC of parameter 5603) to specify whether to check a broken position coder wire
is not available. When it is not necessary to check for this failure, the NAL bit of parameter 5602
should be set; this parameter is primarily intended to specify not to check for an alarm condition
in the spindle speed control unit. If this parameter bit is set, an alarm condition in the spindle ampli-
fier is not checked either.
(ii) Spindle contour control
Spindle contour control requires the BMI interface.
(iii) Canceling spindle contour control
When a spindle contour control axis is canceled, the spindle enters the spindle rotation control
mode. Therefore, it should not be canceled.