3M DELTA Series - Tape Guide Adjustments

Figure 3-7
right-hand cartridge guide (by holding them tightly
together) to the right or left until the scribed lines
are located directly over the heads as shown. Be
certain that the front edge of the cartridge seats
firmly and squarely against the tape guide screws.
Tighten down the right hand cartridge guide mount 
ing screws, making sure it does not move or change
positions.
Remove the cartridge and reinsert it into the
machine, forcing it to slide squarely against the right
hand guide. Check the alignment again. If it is not
exactly positioned, repeat the alignment procedure.
NOTE: It is very important that this alignment be
made as accurately as possible, and that it be con 
sistent with other cartridge machines in the system.
Failure to achieve consistent alignment from ma 
chine to machine will create inconsistent tape travel
path and thus phase error on stereo machines and
azimuth level errors on mono machines. Check the
position of the capstan shaft and pressure roller
shaft. If they are not correctly positioned, repeat
steps B and C before proceeding.
G. TAPE GUIDE ADJUSTMENTS
This set-up procedure provides for a very pre 
cise adjustment of the distance between the "tangs"
of the tape guides. It also sets up a three-point con 
tact area between the guides and the tape. The
mechanical stress of tape edges is minimized while
affording a very closely controlled tape path across
the heads (Figure 3-7). ITC advises that all cartridge
machines within your system would benefit from this
set-up procedure, due to the increased accuracy in
setting up guidance.
The precision ground set-up gauge, 830-0041-
022, allows the user to set the tape guide tangs to a
typical tape slit width.
1. The head shield must be removed before begin 
ning guide adjustment. After removing the shield.
reinsert the right hand flat head screw and
spacer, and retighten to secure the head block
to the deck.
2. With the gauge flat on the deck surface, as for
height adjustment, begin adjustment of the left
(entry) tape guide:
a) Loosen the guide mounting screws.
3-4
Figure 3-8