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XYZ Machine Tools
ProTURN SLX 1630 ProtoTRAK SLX CNC Safety, Installation, Service & Parts List Manual
3.1.2 Turning Diameters Out of Round
Parts are not round within .015 mm TIR for SLX 1630. This is best measured by
using a .002 mm dial indicator and mounting to the inside taper of the spindle.
Rotate the spindle and measure the indicator movement.
Do the following service code and procedures:
Possible Cause
Check This
Tooling problem
Improper tooling, workpiece not properly supported.
See Machine Tool & Setup, Section 4.1.
Loose bearing problem
Looseness in the spindle bearings. See Mechanical Drive Train (X, Z),
Section 4.2. Spindle bearing not preloaded correctly. Reseat bearing and
preload. See Spindle Bearing Preload, Section 5.1.16.
3.1.3 Cutting Taper
Parts are considered to be cutting on a taper if there is a difference in diameter of more than
.02 mm over 152.4 mm. This is best measured by using a .002 mm micrometer.
Do the following service code and procedures:
Code 12
Determines the feed forward constant for the axis motors.
Possible Cause
Check This
Machine set-up problem
Machine not leveled properly
See Leveling - Section 2.9.
Tooling problem
Improper tooling; Work piece not properly supported. Use steady rest or
follow rest, reduce overhang from chuck headstock or tailstock.
Looseness in the gib or
misalignment of ball screw
Gib adjustment.
See Gib Adjustment - Section 5.2.1.
See Z Ball screw Alignment - Section 5.1.14.
Loose bearing problem
Looseness in the spindle bearings.
See Mechanical Drive Train (X,Z) - 4.2.
See Spindle Bearing Preload - Section 5.1.16.
Headstock and/or tailstock
not aligned
See Adjust Headstock for Taper - Section 5.1.15.
To adjust tailstock from side to side, adjust gib screw. See Aligning
Tailstock to Spindle Section 5.1.17.
3.1.4 Parts Have Incorrect Dimensions
Parts are being machined with dimensions that are different than those programmed.
Typical accuracy expectations should be:
Parts should be round within .015 mm TIR on both the SLX 1630.
The acceptable measurement of parallelism of spindle axis to carriage movement
is .02 mm over 152.4 mm.
3.1.4.1
Every Part Has the Same Error
Possible Cause
Check This
Programming Error
Programmed dimensions not correct. Check
absolute and incremental values.
Machine & Setup Related
See Machine Tool & Setup - 4.1.
3.1.4.2
Errors are Random or Accumulate in Size over the Part Run
Possible Cause
Check This
Machining Setup
See Machine Tool & Setup - 4.1.
Looseness in the Drive Train, ball nut loose in
yoke, split nut loose, yoke loose
See Mechanical Drive Train (X,Z) - 4.2.
