Instruction manual

1-13
be supported by the tailstock.
(2) When chucking a workpiece, determine the chucking
method and chuck pressure considering the rigidity of the
workpiece so that the workpiece will not be distorted by
the chuck.
(3) Machine vibration will result when workpiece with its
center of gravity not at the chuck rotating center is rotated
in the chuck. This, in turn, will deteriorate the accuracy of
the machined workpiece.
(4) Careless tooling will cause interference between the tools
and the workpiece being cut or the tailstock. Check the
tooling carefully to avoid interference.
(5) Before starting the day's operation, break in the spindle
and the axes. This will minimize the influence of thermal
distortion on workpiece accuracy.
(6) When bar stock is used, its bend has veridical influence
on the accuracy of the machined workpiece. Use straight
workpieces only.
(7) If any chips are entangled on the wlrkpiece or cutting tool,
surface roughness will be deteriorated. Select a cutting
tool which will not entangle chips.
(8) Workpiece materials and shapes will vary widely. It is
necessary to select the cutting conditions best suited to
each workpiece in order to obtain the required accuracy.
(9) When forged or cast workpiece are used, the cutting
allowance varies greatly from the finished dimensions. To
avoid this variation, either write a program in which takes
the variation into consideration or perform pre-machining
so that a uniform cutting allowance is left on the
workpiece.
1.2.7 Precautions when Selecting coolant
There are a variety of types of coolant available on the
market. We do not specify the type of coolant to be used.
Choose a coolant suitable for the user's applications by
consulting the supplier, taking the following requirements
into consideration.
(1) The coolant must be free of constituents with adverse