Specifications

Southwestern Industries, Inc.
ProtoTRAK

SMX K2, K3, K4 & Retrofit Safety, Installation, Maintenance, Service & Parts List Manual
39
3.1.2 Circles Out of Round
Circles are not round within 0.002” TIR over 3.0” DIA. This is best measured by placing
a dial indicator in the quill and sweeping around the part.
Note: The typical slideway-milling machine is not capable of achieving more precise results
although careful adjustments to a new milling machine may produce better results. If more
precise circles are required, then it is recommended to use a precision boring head/boring bar.
Do the following Service Codes and document values:
• Code 33 Software Identification. This is needed if you call SWI Customer Service.
• Code 11 Measures backlash in the system (Only used on Dual Feedback systems)
• Code 12 Feed Forward Constant.
• Code 127 Measures backlash in the system (not used on Dual Feedback systems).
• Code 128 Enter backlash compensation.
Possible Cause Check This
Torque values on X and Y-axis are too
high.
Make sure torque is lower than 20 in-lbs. Normal values for a
machine that is aligned and adjusted properly should be
between 10 and 15 in-lbs. Make sure torque is consistent across
axis travel.
Machine Tool and Setup problem
Check for any looseness in the setup (Tool, Tool holder, Part,
Vise, or Fixture). See Machine Tool & Setup - Section 4.1
Machine not level
Verify that the machine is level to specification.
Head is not Trammed Verify that the Head is Trammed to specification. See Tramming
the Head Sec 5.2.3
X and Y Gibs are not adjusted properly Check the adjustment of the X and Y Gibs using the X and Y Gib
adjustment procedures.
Calibration or Backlash problem Recalibrate the machine. Reset the Backlash. Check
Repeatability and Positional Accuracy. See Calibration &
Backlash Constants Section 5.2.2
TRAK Sensor or Glass Scale problem Make sure that the Sensor or Glass Scale is installed correctly
according to the Sensor or Glass Scale Installation procedures.
Check for any loose brackets or misalignment etc. Also, check to
make sure the Sensor or Glass Scale assemblies are functioning
correctly. See TRAK Sensors or Glass Scales Sections 4.6 & 4.7.
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 4.2
Head Bolts are loose Verify that all the head bolts are tight. 50 lbs.
3.1.3 Taper Cut on a Programmed Straight Line Move
An unwanted tapered cut occurs, when the machine is programmed to move in a straight
line along either the X or Y-axis. The DRO shows motion of a few thousandths of an inch
in the axis that is not supposed to be moving.