page 17808D turning and milling Service guide
Case3
Case2
If the fault is
：
Press the axis + (or axis-) key, screen coordinates
change but the machine does not move.
If the fault is
：
Press the axis + (or axis-) key, the machine can
move until the hardware limit switch alarm appears.
If the fault is
：
Press the axis + (or axis-) key, the machine is always
moving in the opposite direction.
Case4
Service case
of hardware
fault
Check whether the PPU is in the program test
state.
1. Whether the indicator light of the
"Program test" key on MCP is on (it should not
be on).
2. Whether the "PRT" indicator on the PPU
screen is activated (it should not be activated).
Check whether the machine deceleration switches and their related
connections are broken.
Check whether the machine deceleration switches can bounce.
Check whether
the machine deceleration switches and their related
connections
are broken.
Case5
If the fault is
：
Press the axis + (or axis-) key, the machine moves
only a short distance.
If the fault is
：
Press the axis + (or axis-) key, the machine alarm
20002 appears after exiting the slowdown switch.
If the fault is
：
Press the axis + (or axis-) key, the start point and
automatic processing program are running normally, but the
system does not respond when returning to the reference point.
Case6
Case7
Check whether the settings of machine data MD34000 are correct (the
machine deceleration switches are not available when 34000=0).
Check whether the machine approaching switch and its related connections
are damaged.
Check whether the settings of machine data MD34060 are correct.
Check whether the encoder corresponding to the feed axis and its related
connections are damaged.
Check whether the setti
ngs of machine data MD30200 are correct (it
cannot return to the reference point when 30200=0).
Check whether the settings of machine data MD30130/MD30240/
MD30350 are correct.
1. Feed axis MD30130=2 / MD30240=3
2. MD30350=0
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