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XYZ Machine Tools Ltd
XYZ Bed Mill Safety, Installation, Maintenance, Service & Parts List Manual
4.1.2
A Special Word About X/Y/Z Gibs
The slideway surfaces are vital to the performance of the bed mill.
Gibs should be:
flat
free of twist
free of burrs
free of blockages in the oil passages and channels
Defective or scarred gibs must be replaced. Shimming of gibs will not yield acceptable results.
It is good machining practice to avoid the use of shop air to clean the swarf off a machine. This risks
blowing swarf into the sliding way surfaces and compromising the performance of the machine.
Gibs that are not adjusted correctly will affect the performance of the machine. It will lead to positioning
and repeatability problems. The gibs should be adjusted at least twice a year.
See Gib Adjustments Section 5.2.1.
4.1.3
Lubrication
Lubrication is one of the single, most important maintenance issues and plays a key role in assuring the
performance and durability of the bed mill. At the beginning of each day manually supply oil to the way
surfaces.
Lack of lubrication can lead to a variety of problems with your machine motion due to increased friction in
the sliding ways. This increased friction may lead to part inaccuracies and decreased life expectancies of
your ball screws and way surfaces.
4.1.4
Machining Set-Up
The machining set-up itself is always something that can greatly influence the performance of the mill.
The following are some things to keep in mind:
Problems With
Can Contribute To:
Feed and Speeds (spindle rpm)
See below
Poor finish
Machine chatter
Excessive speeds and feeds can break cutting tools or
wear tools prematurely.
Tooling
Using the wrong cutter for an application
Entering the wrong size diameter and programming with
tool compensation.
Poor finish
Parts incorrect size
Cutting too deep
Part dimensions incorrect
Driving and cutting forces cause deflections, since no
material is totally rigid
Machine chatter
No coolant
Poor finish, decrease the life of the cutter
4.1.4.1
Spindle Speeds
Spindle speeds are influenced by a number of variables:
Material
Rigidity of the Machine Setup