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Exatron 3000B
www.exatron.com 7-5 Chapter 7 Preventive Maintenance
Biannual Maintenance
AFTER
1000
HOURS
,
OR MORE OFTEN AS NEEDED
Schedule your handler to be taken out of service for one day. The entire handler should be inspected by a
qualified technician. The following procedures should be implemented:
1. Clean the output solenoid of the shuttle assembly inside and out with isopropyl alcohol on cotton
swabs. NEVER USE OIL OR LUBRICANT OF ANY KIND ON SOLENOIDS.
2. Check for loose and/or missing nuts and bolts which may have been caused by vibration to the
handler. Replace missing parts immediately. Re-tighten any loose nuts and bolts.
3. Check stepper motor set screw tightness.
4. Check the voltage of the +5 volts and +24 volts "intelligent" power supplies built into your handler.
Calibrate if necessary. The acceptable voltage ranges are +5.05 volts to +5.25 volts and +22 volts to
+26 volts, respectively. Please refer to
F
IGURE
7-1
for power supply mechanical details.
T
O
C
HECK
V
OLTAGE
:
A. Turn the handler power OFF.
B. Remove the blue side cover plate of the handler control box. This will expose the
internal card cage. Locate the 3000B Front Panel PCB card. The Exatron part# is
5000-A89-C-3
. Locate the three posts on the right side of the card labeled
+24V
,
+5V
and
GROUND
.
C. Attach the positive probe of a volt meter to the
+24V
post. Attach the ground probe of
the volt meter to the post marked
GROUND.
D. Turn the handler power ON. If the voltage registers in the acceptable range, nothing
further is required for the +24 volts supply. If the voltage is out of acceptable range,
calibrate the +24 volts supply.
T
O
C
ALIBRATE
:
CAUTION
- T
HIS POWER SUPPLY USES
H
IGH
V
OLTAGES
. O
NLY QUALIFIED SERVICE TECHNICIANS
SHOULD CALIBRATE THE POWER SUPPLY
.
A. Remove the blue sheet metal power supply cover.
B. Locate the blue plastic potentiometer ("pot") on the front of the +24 volts power
supply, the larger of the two power supplies.
C. With a small thin-bladed screwdriver, slowly turn the pot adjustment screw until the
voltage reading moves into the acceptable range.
D. Turn the handler power OFF and check and/or calibrate the +5 volts supply using the
same method as described above for the +24 volts supply. Substitute the post
marked
"+5 V"
in place of the post marked
“+24 V”
in the instructions.
NOTE: The +5 volts power supply is smaller than the +24 volts power supply and the pot adjustment
screw of the +5 volts power supply must be turned
even more slowly and carefully
than the pot of the
+24 volts power supply. If the +5 volts pot is adjusted too quickly, the power supply will overload and shut
down for several minutes.