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XYZ Machine Tools Ltd
TRAK
2
OP
Installation, Maintenance, Service & Part List Manual
4.5.5
Manual tool loading button is not working (green button on head)
A green button is mounted on the front of the head to allow the user to load a tool manually into the
spindle. Pressing this button activates an air cylinder, which pushes down on a drawbar in the spindle.
This in turn opens up the fingers that grip the tool pull stud. When this button is released, the air cylinder
moves up and the fingers grab the knob and hold the tool in the spindle.
Warning!
Be careful when loading tools. The tool is held in the spindle with about 500kg of force.
Possible Cause
Check This
No air or low air is supplied to the
machine
Check for flashing low air pressure message on the display.
Switch has failed
Check the wiring to the switch and where it plugs into the computer
module as an input (“Unclamp BT”).
Air solenoid that supplies air to the
tool change air cylinder is not
working
Check the solenoid 1 (see 27563-2)
Check pneumatic diagnostics, section 5.9
Computer module failure
See computer module diagnostics, section 5.3
4.6
Measurement Problems
4.6.1
X, Y and Z-Axis Measurements Do Not Repeat
With a dial indicator mounted to the bottom of the spindle, touch off a fixed surface either in the X or Y-axis
direction and then set the DRO equal to 0. Crank away several inches and then touch off again at the same
place. If the reading has not returned to 0 on the DRO, zero the display and repeat the procedure. This will
test for uni directional repeatability. If the measurement does not repeat, you have a repeatability problem
that must be resolved.
Test for accumulative error by moving the axis a number of times to see if the error gradually grows by a
small amount. If the error abruptly changes by a large amount it may be caused by a bad motor encoder.
Expected repeatability numbers should be 0.01mm or less.
Bi directional repeatability tests moving up to the same point from different directions. If the machine does
not repeat bi directionally, then you may need to adjust your backlash compensation for the given axis
using service code 128.
In order to identify whether the problem is mechanical or electrical/software, make a mark on the motor
and verify the motor shaft or coupling returns to the correct position. If it does, but your indicator does
not, then the problem is mechanical in nature.
Possible Cause
Check This
Machine Tool & Setup problem
Check for any looseness in the setup (Tool, Tool holder, Part, Vise,
or Fixture). Make sure there is sufficient contact between the tool
holder and the spindle. See Machine Tool & Setup Section 5.1
Thermal expansion of the
ballscrew
If the machine is run very hard at high feedrates then this may
come into play.
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. The
coupling is the first place you should look. Make sure the coupling
is not slipping on the motor or ballscrew end.
Summary of Contents for TRAK 2OP M11 Mill
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