Wiratech Lock-and-Follow MY-812A User manual

MY-812A
Lock-and-Follow Solid-Ink Coding Machine
O p e r a t i o n M a n u a l

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CONTENT
CONTENT ........................................................................ 1
1. Summary....................................................................... 2
2. Specification .................................................................. 2
3. Equipment and Adjustment ........................................... 4
4. Operation and Parameter ............................................. 7
5. Trouble Shooting ........................................................... 8
Electric Circuit Diagram for MY-812A .............................. 14

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1. Summary
MY-812A Lock-and-Follow Solid-ink Coding Machine is
a new type of coding machine that print by ink-roller, which
can match all kinds of vertical and horizontal automatic
packaging machine. It can print the manufacturing date,
batch number and other labels automatically, with compact
structure and simple equipment, high speed and large area
printing, and with letter line agility and the smallest print
place as well, which is the ideal coding equipment for
foodstuff, medicine, and cosmetic fields.
2. Specification
Voltage: AC220V±10V, 50HZ
Power: 145W
Heating Tube: Ink-roller heating tube 110V, 50W;
Print wheel heating tube 110V, 50W
Print speed: ≤300pc/min, Line speed≤0.6m/sec.

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Smallest print space between words:
70mm(two lines); 50mm(three lines);
35mm(four lines).
Print lines:
at most 13 lines for 10.5PT-T type, at most 11 Letters
each line;
at most 13 lines for 10.5PT-R type, at most 9 Letters
each line.
The Letter (height): (2×1.5) 8PT; (2.5×2) 9PT; (3×3)
10.5PT
The type of printing head:
Clockwise printing head (print wheel turn clock-wisely);
Anticlockwise printing head (print wheel turn
anticlock-wisely).
Specification of ink-roller: ф36×32mm
Weight: 14.5
kg

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3. Equipment and Adjustment
3.1 Confirmation for clockwise or anti-clockwise printing head
Confirm the type of printing head, which is based on the
package film direction. Generally, if the package film and
product move from left to right, choose the anti-clockwise
printing head. Otherwise to choose clockwise printing
head.
3.2 Equipping the bracket
A. The coding bracket should be equipped at the place where is
convenient for printing and packing.
B. After equipping the bracket with enough rigidity, you should
ensure the stamping roller and guiding film roller are kept
parallel, otherwise, packing film can’t be driven evenly.
C. After equipping bracket, the packing film can go through
between the printing wheel of print head and stamping roller,
and meanwhile to form a wrap angle on the stamping

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roller.(fig.3)
3.3 Equipment for approaching switch (photoelectric switch)
A. The coding sign is produced by approaching switch
(photoelectric switch).
While using approaching switch, the sensor usually is
equipped on the shaft of horizontal sealing cutter for
packaging machine or the other lock-and-follow shaft, in
order that when the cutter shaft turn a circle, the
approaching switch will produce a sign (two cutters and two
sensors; when turning a circle, the sensors will produce two
signs), and the coding machine is driven to finish one print.
B. The sensor should be metal (the magnetic metal is the best
material), and the width is about 15mm. The approaching
switch should be fixed tightly, otherwise will lead to the wrong
action. There is 2-4mm distance between the front part of
approaching switch and sensor.
C. If using the photoelectric switch, it needs to use the color

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tracking sensor to track the color mark, then give printing
signal.
D. Both the out-put of the above two are NPN type.
3.4 The printing sign from packaging machine
Through getting the sign from packaging machine, which is
controlled by sensor of color mark or the couple of normally
open contacts of relay synchronized with cutter shaft. (Refer
to electric circuit.)
3.5 Adjusting
A. Check the position for the printing head and the stamping
roller; make the print wheel stay at the initial position, there
should be gap for the print wheel opposite the stamping roller,
but not touching with stamping roller (refer to figure 3),
otherwise the machine wouldn’t print. When the machine
prints, the stamp wheel must be close to the print wheel as
near as possible, otherwise it cannot print as well.
B. Loosing the screws of two ends of the cross beam, and
adjusting the swing angle of the cross beam and the position

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of the stamping roller’s fixing block to the left or right place,
and make the gap for the print wheel opposite the stamping
roller before starting. Through adjusting the bottom screw of
the fixing block, the pressure and the balance of the
stamping roller and print wheel can be adjusted. When
adjusting the pressure, you can turn the print wheel by using
the test button of the control panel, and check whether the
pressure is proper or not.
C. The motor drives the turning of the ink-roller, please adjust
the print wheel’s rotational speed on the control box, in order
to keep the speed same as the package film.
4. Operation and Parameter
4.1 Changing the date before starting the machine
See figure1, getting off the print wheel and remove the silica
sheet and gasket firstly, then change the date. After
changing the date, please put the gap of print wheel
opposite the print shaft of stamping roller, while turn slightly

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till the print wheel enters the right place.
4.2 Preheating before operation
See figure2 about controlling box panel, when you turn on
the power switch and adjust temperature control knob, after
20 minutes of preheating (the preheating time is up to the
ink roller type and its temperature setting), then try to print.
If the printing word is clear, the print can be used.
4.3 Changing the ink roller
If it is not allowed to stop the machine for more than 10
minutes, then preheat the roller by the heater device.
4.4 Adjusting the printing position
Adjusting the printing position knob on the controlling panel
will be OK if the turning speed of print wheel and packing
film are same.
5. Trouble Shooting
5.1 No printing

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A. Controlling part
See the figure 2—signal light for the panel.
If the light is off when power switch is turned on, check
whether the power is connected or the switch is damaged.
If the light is on when the machine operates, the light isn’t
twinkling, and there is no printing sign, check whether the
sensor is equipped at the correct place or not.
If the signal light is twinkling, the printing head don’t move,
please check the printing head.
B. Printing head
Check whether the magnetic iron acts or not.
Check whether the print wheel is jammed or not.
Check whether it is close enough between the print wheel
and stamping roller.
Check whether the gap of printing wheel is opposite to the
initial place of the stamping roller.
Check whether the motor functions or not.
5.2 The printing is not clear
A. Ink roller and the heating block for print wheel have no