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Technical Manual: Butted Seam
70 Class Machines Set-Up and Operations
OUT OF THE BOX
1) Upon removing the machine
from its box observe its threading carefully and compare it with the threading
diagram supplied with the machine.
Keep this threading diagram for future reference. The
matter of threading is very important and
if difficulty arises, the threading of the machine should be compared with the
individual diagram supplied. Threading is simple, but it must be accurate.
2) Secure the machine
mounting assembly to the table with the three screws provided. This assembly
should be:
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A.
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Parallel with the center line of the
motor. |
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B.
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When the machine is set on the assembly, the
front of the machine will be three or four inches back from the front of the
table with its Hand Wheel to the right of the operator. |
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C.
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The Hand Wheel Belt Groove should line up
with the Motor Pulley Groove, when the Motor Pulley is in the running
position. |
3) Check the Hand Wheel
(belt) Guard to be sure it does not hit the belt. Adjust if necessary; by
removing screw, repositioning, and replacing screw.
4) Assemble Thread Stand and
screw its base to the table at the rear of the machine.
5) The thread guides at the
top of the Thread Stand should be directly over the center of the cones of
thread.
6) The thread or yarn should
be wound on cones, which should stand vertically. The thread from these cones
should lead up to the Safety Cross Rod (8-52-J) through the thread eyes and
diagonally downward to the machine. Note: The Safety
Cross Rod should be installed with the thread eyes below the rod. Care should
be taken to be sure the threads are far enough apart so that they will not whip
together when the machine is running at speed.
7) Be sure the thread will
come off the cones readily, with uniform tension and that it cannot catch under
the cone or elsewhere along its path.
8) Since the oil has been
drained from the machine before shipping, the main reservoir must be filled
before the machine is used (Note section 15).
SPEED
9) The Styles 70-D3B-2
and 70-Y3B-2 have a recommended speed of 2250 stitches per minute. Styles
70-D3B and 70-Y3B are designed to run at 1500-1800 stitches per minute. Merrow
Styles 70-ABB, 70-AND-1 and 70-ABBY are designed to run at 2800-3000 stitches
per minute. Merrow Style 70-1D-2 is designed to run 4000 stitches per minute.
While these machines may run well with little care, they will give better
results with suitable attention.
MOTOR
10) To obtain full
efficiency, the Motor Drive equipment must be kept in good operating condition
in order to start and stop the machine with minimum delay. When laying out the
Motor Drive equipment, attempt should be made to avoid driving from a large
pulley to a relatively smaller pulley, the centers of which are close together,
as such an arrangement will allow excessive slippage of the belts, materially
reducing the speed of the start and stop of the Merrow Machine.
11) A V-Belt Hand Wheel with
an effective (pitch) diameter of 3-1/3" (85mm) is supplied with 70-D3B and
Y3B Models. On 70-ABB and ABBY machines the effective (pitch) diameter is
2-1/8" (54mm). If an individual motor is being used, the machine may be
run with a 3/8" (9.5mm) width endless V-Belt. Where round belting is used,
either 1/4" (6.5mm) or 5/16" (8mm) round belting may be used.
12) The top of the Hand
Wheel of all Class 70 machines must turn away from the operator.
13) Consult your nearest
Merrow Distributor to assure proper motor drive equipment.
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