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TROUBLESHOOTING (Continued)
--ELECTRICAL--
--PROBLEM--
Insufficient hesitation
at carriage stops
prior to reversing
traverse direction for
relief grinding.
If the carriage
traverses to one end
of stroke or the other
and it stops and does
not reverse direction .
If the carriage
traverses past the
proximity switch and
keeps on traversing
in same direction.
Traverse changes
directions erratically
while running in
traverse cycle.
--POSSIBLE CAUSE--
The dwell time on the traverse
drive control not set properly.
Proximity switch is not working
properly or wire connections
are loose.
The two proximity switches
have been reversed on the
slide bar.
Proximity switch has failed
Loose wire to proximity switch.
--REMEDY--
Reset dwell time on traverse
control board as required; one
increment increases dwell time
by 1/2 second. See Page 50.
First check to see if proximity
light comes on when placing a
steel piece over the prox
switch. When the light is on it
means that there is electricity
coming to proximity switch.
Left proximity (PROX 1) check
Traverse Drive Control (TDC)
between terminals #14 (black
wire) and #15 (brown wire)
Right proximity (PROX 2)
check (TDC) between termi-
nals #13 (black wire) and #15
(brown wire).
Replace proximity switch if the
voltages do not read as above.
Reverse the switch assembly
on the slide bar
Make sure the proximity light is
coming on when placing a steel
piece over the prox switch.
Check proximity spacing to the
sensor. If no light, first check
adjustment section for proximity
setting. If there is a light, it
means that there is electricity
coming to the proximity switch.
Left proximity (PROX 1) check
(TDC) between terminals #14
(black wire) and #15 (brown
wire).
Right proximity (PROX 2) check
(TDC) between terminals #13
(black wire) and #15 (brown
wire).
Replace proximity switch if the
voltages do not read as above.
Check wire connections from
the proximity switches and
tighten down screws.
25
TRAVERSING
--REASON--
The light coming on shows
the proximity is getting
electrical contact.
Proximity light on--
0 Volts DC
Proximity light off--
12 Volts DC
Proximity light on--
0 Volts DC
Proximity light off--
12 Volts DC
This will only happen if the
main reversing board has
been replaced and not
rewired to electrical dia-
gram.
Proximity light on--0 Volts DC
Proximity light off--
12 Volts DC
Proximity light on--0 Volts DC
Proximity light off--
12 Volts DC
A loose wire connection will
give intermittent electrical
contact.
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