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XYZ Machine Tools Ltd
TRAK
2
OP
Installation, Maintenance, Service & Part List Manual
Machine Tool and Setup problem
Check for any looseness in the setup (Tool, Tool holder, Part, Vice,
or Fixture). See Machine Tool & Setup - Section 5.1
Torque values on X and Y-axis are
too high.
Make sure torque is lower than 12 in-lbs. Normal values for a
machine that is aligned and adjusted properly should be between 5
and 10 in-lbs. Make sure torque is consistent across axis travel.
X & Y-axis Drive Trains are loose
Check Repeatability using the Repeatability and Positional Accuracy
procedure. Step by step, carefully inspect the Drive Train for any
looseness. It may be necessary to disassemble and then reassemble
the Drive Train. See Mechanical Drive Train (X, Y) Section 5.2
4.1.3
Parts Have Incorrect Dimensions
Parts are being machined with dimensions that are different than those programmed. Typical performance
expectations should be:
•
Circles:
0.05mm TIR over a 45mm dia. (assumes cutting Euclid block)
•
Positional Accuracy:
0.015mm
•
Repeatability:
0.015mm
Do the following Service Code:
•
Code 33 Software Identification. This is needed if you call XYZ Customer Service
•
Code 123 Calibration
•
Code 128 Enter backlash compensation
4.1.3.1
Every Part Has the Same Error
Possible Cause
Check This
Machine Tool & Setup problem
See Machine Tool & Setup Section 5.1
Programming Error
In the program, look for common errors in programming such as
transposing numbers, tool diameters, and pressing INC SET when
ABS SET is meant. This is especially suspected if the dimensional
errors are larger than a few thousandths. See the Controls
Programming, Operating and Care manual.
Configuration file that contains
calibration file has been erased or
corrupted.
Recalibrate the system.
Backlash problem
Unusual high backlash values are causing slight variations in your
part dimensions. Values for backlash should be less than 0.08mm.
4.1.3.2
The Dimensional Errors Are Random or Accumulate in Size Over the Part Program Run
Possible Cause
Check This
Machine Tool & Setup problem
See Machine Tool & Setup Section 5.1
X and Y-axis Drive Trains are
loose
Check Repeatability using the Repeatability and Positional Accuracy
procedure. Step by step, carefully inspect the Drive Train for any
looseness. It may be necessary to disassemble and then reassemble
the Drive Train. See Mechanical Drive Train (X, Y) Section 5.2
4.2
Motion Related Problems
4.2.1
Unexpected Axis motion
The axis makes an unwanted move at rapid speed in one direction and faults out. This is usually caused by
an encoder signal being interrupted or excessive following error on that axis. Following error is when the
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