Gerber Sabre Owner's Manual page 70

62 Sabre Owner's Guide
PROBLEM ~One of the axes will not
OCCURS
move to the Orient Point,
DURING other axes operate
ORIENTATION normally – NO errors
- Continued appear on Keyboard
Display.
EMERGENCY ~"EMGNCY SW FAULT"
STOP lamp on Driver Board is
SWITCH
activated or there are
TESTING problems with shutting
down via the switches.
Cable connects Left &
Right Switches, Cable
connects Left Switch to
keyboard Support Switch,
Cable connects
Keyboard Support Switch
to Electrical Tower
connection # R166.
TO TEST THE The Limit Switches are normally closed. An OHM reading taken across the pins of the Limit Switch
LIMIT connector usually shows between 4 and 7 OHMS. If the reading is zero or high, the Limit Switch should
SWITCHES &
be replaced. When a Limit Switch is tripped either by the Vane that the Switch straddles when the axis is
CIRCUITRY moved to the Orientation Point or by manually inserting a screwdriver, putty knife or other device that will
attract the magnets in the Switch, the OHMS should rise at a steady rate. If there is no reaction on the
Meter when the Limit Switch is tripped, replace the Limit Switch. If the Switches test out properly, repeat
the OHM test at the Tower end of the Cable Connection for the axis being tested – repair/replace as
required. If cabling tests out, check the connections of the harness for that axis where it attaches to the
Driver Board. Use the following as a reference for the Cable and harness test.
POSITION
Z-AXIS
Y-AXIS
X-AXIS
~Problem with drive
mechanism on affected axis.
~"Break" in wiring cicuit for the
Emergency Stop Switches or
poor connection at the P123
position on the Tower Driver
Board.
Check for loose connections
or damage to cabling
throughout the connecting
cabling.
TOWER CABLE CONNECTION
UP – pins 3 & 4 / 'JUMPED' – pins 1& 2 P109 – UP – pins 1 & 2 / 'JUMPED' – pins 3 & 4
REAR – pins 1 & 2 / FRONT – pins 3 & 4 P111 – REAR – pins 1 & 2 / FRONT – pins 1 &
RIGHT – pins 3 & 4 / LEFT – pins 1 & 2 P113 – RIGHT – pins 3 & 4 / LEFT – pins 1 & 2
~Check for slippage in pulley-to-motor
connection; possible loose/damaged clamp
on motor pulley. Repair connection as
necessary.
~Check for slippage in pulley-to-Leadscrew
connection; possible loose/damaged clamp
on Leadscrew pulley. Repair connection as
necessary.
~Check for broken/damaged drive belt on
affected axis. Replace as required.
~Activate each E-Stop Switch. If any do not
trip the Tower Circuit Breaker, concentrate
efforts on that Switch and attaching cabling.
~Check switches, cabling and harnesses for
the E-Stop Circuit. If a +24 volts dc pulse gets
to the Tower Circuit Breaker, but the Breaker
does not trip, replace the Circuit Breaker.
~Repair / replace cabling as required.
DRIVER BOARD
*
4
*
Pin 3 is used as GND, pin 1 is common for 2 & 4