Makino V55, Руководство по обслуживанию

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6.7.2.2 Orient Adjustment with Parameter
This procedure sets the orient angle by inputting a value into CNC param-
eter 4077 (Orient Stop Position Shift Amount). The setting value of 4077
represents pulses of the spindle position coder and is input in “detection”
units.
Parameter 4077 provides an angular shift from the Orient Stop Position
established by the position coder ring/sensor assembly.
Determining Parameter 4077 Setting Value
The setting value of parameter 4077 is input as detection units. The value
of a “detection unit” is based on the resolution of a mechanisms feedback
device. In the case of the spindle position coder, it is based on the number
of position coder pulses.
Three factors must be known to determine the number of “detection units”
to input for parameter 4077.
• The number of pulses per one revolution of the spindle position coder.
The V55 uses a 1024 pulse/revolution position coder.
• The angle of one “detection unit”, which is determined by dividing 360
by (1024 x 4). For example, one “detection unit” equals: 360/(1024 x 4)
= 0.088°.
• The angular deviation of the spindle from the “true” orient angle. This is
determined by indicating the drive key on the spindle nose.
Figure 6-34
, illustrates the spindle oriented parallel to the X axis, the condi-
tion of an incorrect orient angle, and the necessary formulae to determine
the orient angle error. The angle error is then used to find the number of
“detection units” to input into parameter 4077.
• On all V55 models, the orientation drive key orients in the –X direction.