OHTAKE NJ-2320 User manual

ＱＵＩＣＨＥＲ
ＮＳＲＩ Type
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Operation manual (Maintenance)
・Read these instructions for the proper use of this machine.
・After having read these instructions, keep them in a convenient
place so you or the operator can refer to them whenever necessary.
自動ネジ供給機
NJ
Automatic Screw Feeder
NJ1MA01M a
Series
02aM

Note:About the screws stock limit
If too much screws are placed into the storage chamber of the feeder, it may affect the process of screw feeding, or
cause the machine to be overloaded and malfunction.
Please refer to the diagram below and carefully adjust the screw level to be 2 ～3mm below upper edge of the rail.
(When the scooper plates are at the lowest point.)
(59)
(59)
2～3 2～3
(46)
Upper edge of
the rail
Lowest point of the
scooper plates
×Too much screws
○Moderate amount of screws
CAUTION ！

Contents
１． Before Use ･･････････････････････････････････････ １
２． Operating Precautions ･･･････････････････････････ １
３． Component Names ･･････････････････････････････ ３
４．Pre-operational Checks and Adjustments ･････････ ４
５．Operating Procedures and Operational Checks ･･･ ９
６． Maintenance ･･･････････････････････ １３
７． Troubleshooting Guide ･････････････ １６
８． Main Specifications ･････････････････ １９
９． Warranty ･･･････････････････････････ ２１
10. External dimension ･････････････････ ２２
１． Before Use
Thank you for purchasing the NJ Series Automatic Screw Feeder. Before using this machine, please make sure that
the following accessories are supplied with the machine.
Accessories Instruction manual x 1 AC adapter x 1 Allen wrench x 1 Screwdriver x 1
Ground wire x 1
To obtain optimum performance from this machine, it is essential that you thoroughly read this manual.
２． Operating Precautions
Install this machine at a level, steady place.
If you install this machine in an unstable location, it may topple or fall, causing personal injury.
Do not operate this machine in places where ammable or explosive gas exists or with high humidity.
Using this machine in such locations will create a safety hazard.
When shutting down this machine at the end of day or, leaving it unused for long periods of time, disconnect its
AC adapter from the power outlet.
Installation
When shutting down this machine at the end of day or leaving it unused for long periods of time
- １-
CAUTION
CAUTION
CAUTION

Use only the AC adapter supplied with this machine otherwise it may
result in a re or electric shock.
Do not scratch the rail. Do not apply any oil or grease to the rail.
Use specied screws only. Avoid using screws to which oil, grease, dirt, or other foreign matter is attached.
When picking up screws, exercise care not to apply any undue force or shock.
Do not position your ngers or foreign objects in the screw bin, holes, or other open spaces as it may cause injury.
Be sure that no inappropriate screws or foreign objects used with this machine.
If any abnormality occurs during operation, turn off the power switch and disconnect the AC adapter from the
power outlet.
If you continue to operate this machine while it is acting abnormally, a risk of re, electric shock, or personal
injury may be caused. If you encounter any abnormality, contact your local dealer.
When this machine is in need of repair, contact your local dealer.
Rail
AC adapter
Incompatible screws
Screw access precautions
Avoid inserting foreign objects
Abnormalities during operation
Avoid making attempt to repair, disassemble, or modify this machine
- ２-
CAUTION
CAUTION
CAUTION
CAUTION
When the earth wire is connected, loosen the screw near the mark once.
After attaching the earth wire,tighten the screw again.
the bottom of the main body
Ground wire

３． Component Names
Screw bin lid
Power switch
Timing shaft
Rail front-rear position lock
screw access hole
Sensor
Bit guide assembly
Holding plate
（Screw guide1）
Rail assembly
Shutter (in front of
screw passage plate)
Passage plate Screw passage window
Passage plate
lock screw
Bin scooper
plate
Screw bin
Tilt lock screws
DC jack
Timer setting control
- ３-
Bin scooper
plate
Brush
Bit guide

Type Model number Screw nominal
diameter
Exchange Kit
number
Rail model
number
Passage plate
model number
NJ-2320 φ2.0 R20SET R20 W2320
NJ-2323 φ2.3 R23SET R23 W2323
NJ-2326 φ2.6 R26SET R26 W2326
NJ-2330 φ3.0 R30SET R30 W2330
NJ-4535 φ3.5 R35SET R35
NJ-4540 φ4.0 R40SET R40
NJ-4550 φ5.0 R50SET R50 W4550
NOTE: Replacement rails and passage plates are available as options.
In the Exchange Kit ordered separately, rails and passage plates are included.
W4540
NJ-23
NJ-45
４． Checks and Adjustments before Operation
４-1．Conrming the machine’s Model Number
Before using this machine, verify that the model matches the screw size to be used.
To conrm the model number, note the labels attached to the rail assembly . The identication label marking is in R** form.
This machine can be converted to different screw sizes by replacing the rail assembly, and the passage plate. When you replace
component parts, verify the actual screw size to be used.
This machine is factory adjusted for pan-head screws prior to shipment. If readjustments are needed to match the screw
applied, complete the following check/adjustment procedures before using this machine.
- ４-
-Checking and adjusting the brush -Checking and adjusting the holding plate (screw guide 1)
-Checking and adjusting the passage plate -Checking and adjusting the rail assembly
Rail label
Rail assembly
Before performing any adjustment procedures, please turn off the power
CAUTION

Before performing any adjustment procedures, please turn off the power
４-２．Checking and Adjusting the Brush
Check the height of the brush. Ensure that the brush check/
adjustment procedure is completed while the brush is placed in
a horizontal position as shown at right. To place the brush in a
horizontal position, rotate the timing shaft with the Allen wrench
supplied with the machine.
Please prepare the screws to be used. Drop a few of them into
the rail groove, check and adjust the brush height as directed
below.
After the brush is placed in a horizontal position as shown below,
rotate the brush. When the resultant gap between tip of the brush
and screw heads is approximately 0 mm, no adjustments are
needed.
If any adjustment is needed, perform the following procedure:
Loosen the brush mounting screws.
Make adjustments so that the gap between tip of the brush and
screw heads is approximately 0 mm. In this instance, avoid lower-
ing the brush too much. After completion of adjustments, tighten
the brush mounting screws.
After the brush is properly adjusted, rotate it again to verify that it
smoothly moves without any obstruction.
- ５-
Turn off the power switch before performing any
check/adjustment procedure. The switch shown
below is in the off position.
Brush
Timing shaft
Brush mounting
screws
Ensure that the gap between tip of the brush cen-
ter end and employed screw heads is about 0 mm.
Employed screw

４-３．Checking and Adjusting the Passage Plate
- ６-
Passage plate
Passage plate retaining screw
Up-down
adjustment
Employed
screw
Rail
Brush
Drop the employed screws into the rail groove. Slide the screws to the passage
window section and check or adjust the passage plate height. Check that the
clearance between the passage window upper end and the screw heads is not
greater than about 0.5 mm and that the screws can pass the passage window.
If the above requirements are not met, repeat above adjustment
procedures as needed.
After adjustment is completed, tighten the passage plate retaining screw. If the
screw applied has a relatively short shank, ne adjustments may be needed. For
screws having a relatively long shank, however, coarse adjustments will sufce.
Drop about 10 applied screws into the rail groove.
Tilt this machine or operate it so that the screws are delivered to the rail assembly
stopper.
If the shutter is closed or there is no clearance between the holding plate
(screw guide 1) and screw heads, the screws will not be able to move. The
screws can move when the shutter is open with an adequate clearance provided
between the holding plate (screw guide 1) and screw heads.
When the clearance is 0 to 1 mm, the holding plate (screw guide 1) height needs
no further adjustment.
NOTE: If the rail stopper captures a screw and brings the vibration to a stop
immediately, adjust the timer setting control on the rear side of the unit.
Holding plate(screw guide1)
Bit guide assembly
Stopper
Passage plate
Rail
Employed
screw
Approx.
0.5mm or less
Rail
Holding plate (screw guide 1)
Approx. 0 to 1mm
Employed screw
Bit guide
４-４．Checking and Adjusting the Holding Plate (Screw Guide 1)

If the holding plate (screw guide 1) height needs to be adjusted, please proceed as directed below.
Tilt this machine or operate it so that the screws are delivered to the rail assembly stopper. If there is no clearance between the hold-
ing plate (screw guide 1) and screw heads, the screws cannot move. The screws can move while the shutter is open with an
adequate clearance provided between the holding plate (screw guide 1) and screw heads.
If the screws do not move to the escaper section, loosen the bit guide assembly retaining screw, and rotate the bit guide assembly
up-down adjustment screw counterclockwise with the accessory Allen wrench to move the holding plate (screw guide 1) upward.
Adjust the holding plate (screw guide 1) height by rotating the bit guide assembly height
adjustment screw to provide a clearance of 0 to 1 mm between the holding plate
(screw guide 1) and the head of the screws.
When performing the above adjustment procedure, ensure that the gap between
the holding plate (screw guide 1) and rail is uniform. Please make sure that the gaps
between the holding plate and the rail are the same on the rear end and the front end.
After completion of adjustment, be sure to tighten the bit guide assembly
retaining screw.
If the employed screw has a relatively short shank, ne adjustments are needed.
For screws having a relatively long shank, however, coarse adjustments will sufce.
４-５． Checking and Adjusting the Rail Assembly
- ７-
Check the position of the stopper and sensor.
・Ensure that the rail is xed so that "A" portion of the stopper is
0mm to 0.5mm ahead of the sensor optical axis.
・If adjustment is necessary, adjust it front and rear by loosening
the rail front-rear position lock screw
Bit guide assembly
Bit guide assembly retaining screw
Bit guide assembly height
adjustment screw
Clockwise rotation → Descent
Counterclockwise → Ascent
Holding plate
（Screw guide1）
Stopper
Rail front-rear position lock
screw access hole
Rail assembly
A
Sensor optical axis

Employed
screw
V groove
Stopper
Bit guide
Bit guide mounting screws
４-６． Checking and Adjusting the Bit Guide
Place ve to ten screws in the rail and tilt this machine until they hit the stopper on the rail as-
sembly.
When the internal shutter is closed, the screws cannot go through the passage plate.
If it is closed, turn the timing shaft clockwise with the Allen wrench to keep it open.
The stopper is xed to the rail assembly. The adjustment of the stopper is made by moving
the rail assembly front and rear. If the “V” groove on the bit guide and the rear point of the
Phillips screw head are not aligned, adjust as follows:
Loosen the bit guide mounting screw with the Allen wrench and move the bit guide forward
and back to put them in alignment.
Please remember to tighten the screws after adjusting.
- ８-