LNS QUICK SIX, Troubleshooting Manual

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2-4 Chapter 2: Common Issues
QUICK SIX
Oil Is Leaking on the Floor / In the Machine
The outboard support, located in front of the bar feed system, stabilizes the guidance of the bar. The support, which incorporates a
guiding element of synthetic material, is supplied with hydraulic oil throughout the entire automatic cycle. At the outlet of the support, a
portion of the hydraulic oil from the bar is recovered by centrifugal force. An air blast, positioned right in front of the bearing element,
blows the residual oil off of the bar before entering the spindle. This is to keep the oil from mixing with the coolant in the machine.
The front bearing element inside the outboard support unlike the other bearing elements is asymmetrical in design and must be
inserted in a particular manner. If inserted incorrectly, the hydraulic oil will not drain back into the body of the bar feed the way it is
intended. Instead, the oil accumulates inside the support and eventually will leak out the front onto the floor or inside the machine (if
the support extends inside the machine). Refer to the
Replacing Guide Elements procedure for the proper installation of the front
bearing element.
Vibration Issues
The term “vibration” is being used regarding the Quick Six, to indicate that the RPM performance of the lathe is physically
deteriorated, to the point of creating an unbalanced rotational oscillation of the bar stock that is detrimental to the machining process.
Various items can cause the bar stock to vibrate, requiring the reduction of the spindle rpm to bring the anomaly back to a normal
controlled rotation. These items can be related (but not limited to) the material, the lathe, the spindle reduction tubes, or the bar feed.
Material
The material must be reasonably straight. LNS has a specification of .5mm / meter (non-accumulative).
If the material is a hot roll type it will not meet our specifications.
If the material has been “cropped” to length the last 6”-12” of the end of the bar may be unusable due to being bent severely in the
process.
Note: Also, there is a possibility to have a severe angle on the end of the bar, which has been cropped. This might
cause the mis-loading of a new bar into the collet of the bar feed.
When running profiled material (hex, square, etc.), vibration is more likely to occur due to the physical properties of the material,
especially with extremely odd shaped material, in which case a lower rpm is recommended.
The composition of the material also has an effect on the guiding of bar stock. Steel and aluminum bars are relatively easy to guide,
but because of the flexibility and specific weight of brass it is generally going to be more difficult to guide at high speeds.
Lathe
The lathe should be level and on a solid foundation. LNS recommends that the lathe be bolted to the floor.
Spindle Reduction Tube
Ensure that the properly sized spindle liner has been installed (matches guiding channel size).
Ensure that the spindle liner is straight (check total run out).
Ensure that the liner is securely fastened.
Bar Feed
The bar feed must be within proper alignment to the spindle of the lathe.
The proper guiding elements should be used to provide minimal gap between the I.D. of the elements and the O.D. of the bar stock
diameter. Should not exceed 10mm overall gap (5mm per side).
LNS recommends running ISO 100 hydraulic oil in the bar feed. In certain cases, a thicker oil (ISO 150) may produce better results
when guiding profiled material.