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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:
| A. |
Parallel with the
center line of the motor. |
| B. |
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. |
| C. |
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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• West Wareham, MA USA 02576
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