5 SUPPLEMENT
5-64
F. Dynamic offsetting
1. Command
Machining with rotation of the rotary table requires in principle the axis of rotation of the
workpiece to be completely aligned with the axis of rotation of the table.
In practice, however, this is very difficult to implement for the reasons of fixture design,
unless a very precise fixture is used. Dynamic offsetting is a function that internally
compensates continuous deviation due to the misalignment in question. As a result,
machining program can easily be prepared on the assumption that the alignment is ideal.
2. Sample
G55
G00 X__ Y__ Z__
M173
G01 Z__ F__
C__ F__
Z__ F__
M174
M30
--- The workpiece axis is assumed to go through the origin of the G55 system.
--- Approach
--- Dynamic offsetting ON
--- Start of cutting
--- C-axis rotation
--- Relief on the Z-axis
--- Dynamic offsetting OFF
--- End of machining
3. Notes
Reduce to 3 mm or less the eccentricity of an actually mounted workpiece from the
axis of rotation of the table; otherwise the alarm 137 DYNAMIC COMPENSATION
EXCEEDED is caused.
The workpiece origin must be set on the axis of rotation of a workpiece when it is to be
machined using dynamic offsetting.
Dynamic offsetting is not effective in the 3-dimensional coordinates conversion mode
(G68).
G. Function for selecting the cutting conditions
1. Command
The workpiece can be machined under the desired cutting conditions by specifying one of
ten accuracy levels (from FAST to ACCURATE).
H. HD spindle selection
1. Command
This function code selects the HD1 turning spindle for machining with the upper or lower
turret. (M901)
This function code selects the HD2 turning spindle for machining with the upper or lower
turret. (M902)
Serial No. 294060
Copyright (c) 2013 YAMAZAKI MAZAK CORPORATION. All rights reserved.
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