Table of Contents
Advertisement
Single Seek
This proceduxe causes a single direct access
to
desired cylinder.
Precondi tiOD tester by
settinq
ST~/STOP
switch to STOP
and
actuat-
inq RTZ switch.
1.
Set INPUT switches to desired cylinder
number.
2. Set LOAD/SEQ BEADS switch
to
neutral
position.
3. Set mode select switch to OIREcr.
4.
Set READ/ACCESS/WRI'l'E switch to ACCESS.
5.
Set
R!W ONLY/RESET
switch to neutral
position.
6. Set REPEAT/SINGLE switch to SINGLE.
7. Set S'l'ART/STOP
awl
tch to STARr.
8. When move is complete, return STAR'l'/
STOP switch to STOP.
Repeated Seek Between
'l'WO
ex
linders
This procedure causes drive to access.
be-
tween
two
cylinders.
Precondition tester by
setting START/STOP switch to S'l'OP and actuat-
ing RTZ switch.
1. Perform single seek procedure to desired
first cylinder if it is other than track
000.
2. Set INPUT switches to new desired
cylinder.
~.
Set LOAD/SEQ BEADS switch to neutral.
4. Set mode select switch to CONT.
5. Set READ/ACCESS/WRITE switch to ACCESS.
6. Set R/W ONLY/RESET switch to neutral
position.
7. Set REPEAT/SINGLE switch to REPEAT.
8. Set START/STOP switch to START.
9. To stop repeated seeking, place START/
STOP switch to STOP.
Seauential Seeks
This procedure causes drive to ac·cess sequen-
tially forward, or reverse.
The direction
is determined by the Mode Select switch, and
the incremental cylinder seek lenqth is de-
termined
by
the setting of the INPUT switches.
Precondition tester by setting STOP/START
switch to STOP and actuating RTZ switch.
If
actuator is not at cylinder 000 and a seqen-
tial forward seek is initiated, the actuator
seeks forward one seek length at a time from
current cylinder position until reaching last
cylinder or an illegal address.
It then
2-12
returns to cylinder 000 in one movement and
continues forward sequential seeks starting
at track 000 and at the seek length set by
the INPUT switches.
If a
sequentia~
reverse seek is initiated,
actuator seeks
in
reverse at the cylinder
increment selected by
INPtJ'l'
switches until
reachinq
track
000.
The operation is then
stopped.
A
direct seek
to
a cylinder other
than
000 must precede a sequential reverse
seek ..
For sequential forward or reverse seeks, do
DOt exceed seek lenqths qreater than
255
tracks.
Otherwise seek lengths different
from that desired will
be
obtained.
E'or
example, if a seek of
256
is commanded,
actuator will seek to:
0,256,1,257,2,
258, 3, 259, and so on.
If CON'l' and SINGLE are both selected, actuate
RESET if the starting seek address is to be
chanqed.
'!'his permits the tester to gate
internally the new address selected
by
INPUT
switches.
Otherwise, tester will command a
return seek
to
original starting cylinder
(stored when operation first started) •
Procedure for Sequential Forward Seek:
1. Perform single seek procedure if desired
startinq position is other than track
000.
2.
Set INPUT switches to desired seek
lenqth.
3. Set LOAD/SEQ HEADS switch to neutral.
4.
Set mode select switch to SEQ FWD.
5. Set REAO/ACCESS/WRITE switch to ACCESS.
6. Set R/W ONLY/RESET switch to neutral.
7. Set REPEAT/SINGLE switch to desired
mode.
8. Set START/STOP switch to START.
9. If REPEAT/SINGLE switch is set to SINGLE,
one seek is made for each START/STOP
switch actuation.
Return START/STOP
switch to STOP when move is complete.
If REPEAT/SINGLE switch is set to REPEAT.
selected seek operation is continuous
until START/STOP is set to STOP.
Procedure for Sequential Reverse Seek:
1. Perform single seek to desired starting
track.
2. Set INPUT switches to desired seek
length.
3. Set LOAD/SEQ HEADS switch to neutral.
4. Set mode select switch to SEQ REV.
83318200
C
Advertisement
Table of Contents
