UNION TOOL MDP-15 User manual

MINIATURE DRILL POINTER
FOR THINNING
MDP-15
OPERATION MANUAL

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UNION TOOL CO.
ADRESS 4-15-8 MINAMI OHI SINAGAWA-KU
TOKYO JAPAN
Tel. [phone]
Fax.[phone]
Version 2 2000.12

MDP-15
MDP-15 OPERATION MANUAL CONTENTS
1. Features Page 2
2. Specifications Page 2
3. Unpacking Page 3
4. Installation Page 4
5. Parts Name and function Page 5
5-1. MDP-15 Frame
5-2. Operation Panel (1)
5-3. Operation Panel (2)
5-4. Universal Attachment
6. Operation Page 9
6-1. Machine Installation
6-2. Initial Set Up -1
6-3. Initial Set Up -2
7. Maintenance & Inspection Page 13
7-1. Adjustment of Universal Joint
8. Trouble Shooting Page 16
8-1. Trouble Shooting
8-2. Pinpointing the Source Trouble
9. Others Page 17
9-1. Drill Wells
9-2. Diamond Wheels
10. Standard Accessory List Page 18
UNION TOOL 1

MDP-15
1. Features
This drill pointer was developed for regrinding of Primary surface as well as thinning of small
diameter drill bits.
By equipping the auto index and automatic table traverse function as well as CCD camera and
monitor, work productivity is increased.
2. Specification
1)Drills Drill diameter Φ0.3mm - Φ0.6mm
Point angle 118° - 140°
Primary face angle 14° - 20° (Primary wheel)
Thinning wheel angke 0° - 40°
2)Grinding wheels Diamond wheel Φ75
Primary wheel #1500
Thinning wheel #1000
3)Motor Wheel Motor Induction Motor
60WDCBL 7200rpm
Index Motor Step Motor
Table Stroke Motor Induction Motor 15W 30rpm
Thinning Table Motor Induction Motor 3W 48rpm
4)Semi-Automatic Type
5)Power Source AC100V
(Use 110V or 220V Transformer)
6)Machine Dimensions and Weight 390(W) x 590(H) x 690(D) mm
70kgs
UNION TOOL 2

MDP-15
3. Unpacking
Check that the following items are in the box after unpacking.
1. MDP-15 Frame (Cover and Wheels are included) 1
2. Attachment 1 Set
3. Crossline Generator 1
4. Focus Mount 1
5. Monitor 1
6. CCD Camera 1
7. Luminer Ace 1
8. Power cord 1
9. Standard Accessories 1 Set
10. Transformer (110V,220V) 1
11. MDP-15 Instruction Manual 1pcs
UNION TOOL 3

MDP-15
4. Installation and Hook up
4-1. Installation
With the UNION Tool MDP-15, it is not necessary install the machine on a completely level
surface. All machine parts should be placed as below.
4-2. Hook up
Hook up the connector cables and codes, and insert the power code to main power socket.
UNION TOOL 4

MDP-15
5. Parts Name and Function
5-1. MDP-15 Main Frame
1 Luminer Ace Illuminated the drill point.
2 Index Motor Connector Connect the code of Index motor
3 Automatic Traverse Table
Used for the advance of the index assembly during
p
ointin
g
.
4 Primary Wheel Used for grinding the primary face.
5 X-Y Stage Used for cross hair line adjustment on monitor.
6 Focus Mount Focus the CCD Camera.
7 CCD Camera Magnifies the drill point.
8 Monitor Monitor the picture of CCD Camera.
9 Cross Hair Line Generator Generate the cross hair line in the monitor.
10 Operation Panel (1) Refer to Operation Panel (1)
11 Thinning Wheel Used for thinning..
12 Thinning Depth Table Used to advance thinning wheel.
13 Traverse Table Micrometer Used to adjust the position of thinning.
14 Operation Panel (2) Refer to Operation Panel (2)
15 Main Power Switch Turns main power on and off.
16 Main Power Socket Socket for the main power code.
17 Attachment Refer to Attachment assembly.
18 Thinnin
g
De
p
th Micrometer Used to ad
j
ust the de
p
th of the thinnin
g
wheel.
19 Thinning Wheel Slide Used for up and down of thinning wheel.
UNION TOOL 5

MDP-15
5-2. Operation Panel (1)
20 TRAV. SPEED Controls table advance speed when pointing and
dressing.
21 SOURCE Illuminated when the power switch is turned on.
22 MOTOR Turns the primary wheel motor as well as the
thinning wheel motor on and off.
23 MODE Used to select the desired mode of operation
1. Automatic operation of grinding primary face
as well as thinning.
2. Thinning cycle only
3. Dressing cycle
Traverse the table successively without turning
thinning wheel.
24 THINNING Advance the thinning wheel by manual.
(one cycle)
25 ORG. Return the drill to the original position after rotating
it with Index 1 or Index 2.
26 INDEX 1 Rotate the drill to a certain amount fixed by
Index 1 (COUNTER)
27 INDEX 2 Rotate the drill to a certain amount fixed by
Index 2 (COUNTER)
28 INDEX 1
(COUNTER)
Adjust the amount of rotation (Index 1)
(800 count / 1rev.)
29 INDEX 2
(COUNTER)
Adjust the amount of rotation (Index 2)
(800 count / 1rev.)
UNION TOOL 6

MDP-15
5-3. Operation Panel (2)
30 POSITION Rotates the drill for pointing.
31 90° INDEX Index the drill 90°
32 180° INDEX Index the drill 180°
33 START Starts the pointing cycle as well as dressing cycle.
Push this button after chucking and cross hair adjustment.
UNION TOOL 7

MDP-15
5-4. Universal Attachment
34 Table Advance Adjustment Screw Used to adjust table advance amount.
35 Grinding Micrometer Controls the grinding amount. It changes the position
of the drill in the drill well and not the quill assembly.
36 Index Assy. Attachment Base The base attaches to the MDP-15 table.
37 Attachment Base Slide Table Slides back and forth to adjust the position of the
entire index assembly. This normally will not be moved
during operation.
38 Grinding Regulator Slide Table Allows for the regulation of the grinding amount.
39 Drill Well Holder Provides a base for the drill well which holds the
drill in place during pointing.
40 Drill Well Holds the drill in place during pointing and can
easily be changed for different diameters.
41 Quill Assy. Motor Rotates drill.
42 Universal Joint Connects the motor to the collet.
43 Collet Holds the shank of the drill during pointing.
UNION TOOL 8

MDP-15
6. Operation
The drill chips and dust will spread in the air when grinding.
Therefore, please where a dustproof mask or set dustproofing device.
Moreover, please ventilate the air in the grinding room every 2 hours periodically.
6-1. Machine Installation
1) Initial set up (Refer to 6-2)
2) Turn the power switch (15) on the right side of the main frame on.
SOURCE lamp is illuminated.
3) Push the motor button (22). The button should now be illuminated and the wheels should
also be rotating.
4) Pointing process (Refer to 6-3)
5) Select the appropriate mode with the mode change switch (23).
6) Set the table speed adjustment dial (20).
7) Insert the drill into the collet.
8) Control grinding amount (Refer to Fig.1).
9) Level positioning (Refer to Fig.1).
10) Press the Start button (33). The button should now be illuminated.
11) When the pointing cycle is finished, the start button should no longer be illuminated.
Position in cross hair before pointing After pointing
[Fig.1] [Fig.2]
6-2. Initial Set up –1
1) Setting the primary face angle.
Locate and loosen the 2 allen bolts on the motor housing which hold the motor housing in
place. Next rotate the motor housing adjustment screws counterclockwise until the desired
angle is achieved Then retighten them.
2) Setting the point angle
Align the quill assembly attachment plate to the appropriate angle on the MDP-15 table.
180°- point angle
=
2
3) Drill well installation.
Select the drill well that corresponds with the drill diameter to be pointed.
UNION TOOL 9
Desired point angle
Grinding amount

MDP-15
6-3. Initial Set up - 2
1) Press the motor button (22).
2) Insert the drill into collet chuck.
Pull the cover on top of collet chuck and while opening the collet chuck, insert the drill to the end.
3) Adjustment of drill for pointing.
With grinding micrometer(35), adjust the amount of drill that protrudes from the drill well.
The ideal quantity extending from the drill well is usually very small, however when repointing
UC type drill bits, make sure that the entire head protrudes from the drill well.
4) Pointing well positioning (The thinning wheel should be sufficiently backward)
a. Adjust the drill close to the position (Fig.1) at the middle of the screen of the monitor.
b. Input 200 to Index 1 counter (28), and push the Index 1 button to rotate the drill 90°
c. Select 3(Dressing mode) of mode selection switch.
d. Set TRAV. Speed (20) to 0.
e. Push Start (33), and the start button should be illuminated.
f. Turn the table speed adjustment dial (20) clockwise until the Automatic traverse table (3)
begins to move to right. Once the point the drill bit is at the middle of the primary wheel
width, turn the table speed adjustment dial to 0 and stop the table.
g. Turn the table advance adjustment screw (34) until the secondary wheel makes contact
with the drill point.
h. Confirm that the secondary wheel has the drill point. (Swarf appears)
i. Retighten the table advance adjustment screw (34) over the pointing position of the
primary wheel.
j. Turn the TRAV. Speed (20) clockwise to move the table to the original position.
5) Cross hair adjustment
a. Press the Index 1(26) and ORG.(25) at the same time to rotate the drill to the position
as Fig.1.
b. With X-Y stage (5) adjust the cross hair line as Fig.2.
*Align cross hair with the edge of the primary face and the margin.
UNION TOOL 10
Insufficient protrusion
from drill well
Ideal Position
Drill well

MDP-15
6) Grinding primary face
a. Set the grinding depth 0.02mm with the grinding micrometer (35).
b. Using Position (23) handle, align cross hair line with the margin.
c. Set Mode (23) to 1.
d. Turn TRAV. Speed (20) to 60% and push Start button (30) to start grinding the
primary face.
e. Remove the drill from the collet, and measure the point angle.
The point angle is lager Decrease the number of Index 1 counter.
The point angle is smaller Increase the number of Index 1 counter.
f. After chocking the drill bit and cross hair line adjustment, set the grinding depth 0.02mm
with the grinding micrometer (35) and grind the primary face again.
g. Repeat the above steps until getting an appropriate point angle.
7) Thinning
a. Set Mode (23) to 2.
b. Push Index 1 (26) to rotate the drill bit.
c. Push Start (33) clockwise until the table begins to move to the right until it reaches to
the traverse table micrometer (13).
d. Input
e. Push Thinning (24) switch to move the thinning wheel back and forward.
f. Using traverse table micrometer (13), advance the thinning wheel forward.
g. Adjusting the position of the drill bit with traverse table micrometer (13), repeat e and f
until the thinning wheel makes contact with the drill point.
h. After the thinning wheel making contact with the drill point, push Index 2 (27) and
ORG. (25) at the same time to rotate the drill bit to the position as it was before thinning.
i. Push Start (33) to return the traverse table to the original position.
j. Push Index 1 (26) and ORG. (25) at the same time to rotate the drill bit to the original
position.
8) Drill point Analysis
a. Set Mode (23) to 1.
b. Set the grinding depth 0.02mm with the grinding micrometer (35).
c. Using Position (23) handle, align cross hair with the margin.
d. Push Start button (33) to start the operation.
UNION TOOL 11

MDP-15
e. Remove the drill from the collet, and check the point geometries.
f. Chock the drill
g. Repeat the above steps until getting an appropriate point geometries.
Index Index 2 Counter
Shape Shape of Diamond wheel
Position Traverse table micrometer (thinning wheel)
Depth Thinning depth micrometer
9) Thinning cycle operation
After getting appropriate point geometries, push start button (33) to start thinning cycle.
UNION TOOL 12

MDP-15
7. Maintenance
7-1. Adjustment of universal joint
Equipments required:
1. Dial indicator (1µm or 2µm resolution)
2. Magnet stand
3. Precision ground testing pin (Standard accessory:Φ1.0mm)
4. 1.5mm allen wrench (Standard accessory)
5. 5.5mm wrench (Standard accessory)
1) Preliminary check
a. Insert the testing pin into the collet.
Use a drill well that fits the pin and make sure that both the collet and the drill well
are free of any dirt.
b. Attach the dial indicator stand to the table.
Place the dial indicator 5 to 10mm from the collet.
c. Check the scale deflection.
Turn the drill and check for any deflection on the scale.
After turning the drill for one revolution, if the deflection is within 5µm, adjustment of inconcentricity
is not necessary.
d. Check Play
Even if the adjustment of inconcentricity is properly done, there may be a rare case that the universal
joints have play. Hold the universal joints at the motor side and the drill side with both hands and
see if there is play by moving it up, down, left and right. When there is play, you will know it
from the touch and sound. In this case, you need to tighten the bolt firmly. After that, check the
movement once again.
UNION TOOL 13
Drill well
Drill side
Motor side
Universal joint
Testing pin
Dial indicator
Motor

MDP-15
2) Correcting Runout
Correction of runout should be done separately for the motor side of the universal and the drill side
of the universal.
(1)How to adjust the universal joint on the motor side
a. Among the two setting bolts, face up the (-) one on the top. Ignore the scale other than the positions of the two
bolts. The bolt facing up is called (A), and the other facing down is called (B).
b. Loosen (A).
Loosening angle of about 7 º eliminates about 0.01mm runout. Adjust it by targeting about 1/2 of difference
between (A) and (B).
c. Tighten the nut for (A).
The nut is for fixing. Tighten it firmly. When tightening the nut, the bolt tends to turn with it. In this case,
you need to use a wrench to keep the bolt in position.
d. Turn the drill for 180°.
(B) is now facing up.
e. Loosen the nut and tighten the bolt for (B).
Tighten the bolt lightly to eliminate play. Do not yet tighten firmly. It should be different from the normal
tightening of the bolt. Later, firmly tighten with a nut.
f. Repeat the above procedure until the difference between (A) and (B) becomes within 5µm.
UNION TOOL 14
Plus side (B)
Minus side (A)

MDP-15
(2) How to adjust the universal joint on the drill side
a. Among the two setting bolts, face up the (+) one on the top. Ignore the scale other than the positions of the two
bolts. The bolt facing up is called (C), and the other facing down is called (D).
b. Loosen (C).
Loosening angle of about 7 º eliminates about 0.01mm runout.
c. Tighten the nut for (C).
The nut is for fixing. Tighten it firmly avoiding the bolt from turning together with the nut.
d. Turn the drill for 180º.
(D) comes to the top.
e. Loosen the nut and tighten the bolt for (D).
Tighten the bolt lightly to eliminate play. Do not yet tighten firmly. It should be different from the
normal tightening of the bolt. Later, firmly tighten with a nut.
f. Repeat the above procedure until the difference between (C) and (D) becomes within 5µm.
Final Runout Control
If one of the following points is not satisfactory, adjust the runout once again.
a. When the drill is indexed for more the 360 º, is the runout of the whole circle within 5µm?
b. Are the bolts tightened too firmly?
When the chuck is put up, does it come down automatically by itself?
When you put the chuck up and down, do you feel any resistance?
c. Is there play at Universal Joints?
Hold the universal joints at the motor side and the drill side with both hands and see if there is play by
moving it up, down, left and right. (When there is play, you will know it from the touch and sound.)
d. After adjusting the chucking, is the runout within 5µm?
There is a possibility that runout control occurred due to defect of chucking. See if the
runout is within the range after removing the drill and redoing it once again.
UNION TOOL 15
Minus side (D)
Plus side (C)

MDP-15
8. Trouble Shooting
8-1. Trouble Shooting
Problem Cause Solution
1 No power to the
machine.
1)Power code is not connected. 1)Connect power code.
2 The wheel does not
Rotate.
1)The motor connection cable
is not attached.
1)Connect the motor
connection cable.
1)The wheels are not rotating. 1)Turn Motor (22) on.
3
Automatic traverse
table (3) does not
move.
2)TRAV. Speed (20) is on 0. 2)Turn the dial to the
appropriate speed.
1)Light bulb is broken. 1)Replace the light bulb.
4
Luminer Ace does not
work.
2)Light cable is not connected. 2)Connect the light cable.
8-2. Pinpointing the Source of trouble.
Method Evaluation
1)If there is variance in point geometries, the
machine probably should requires maintenance.
Grind the same drill bit with the
same parameters several times.
2)If the same point geometries are consistently
produced (even if the geometries are wrong),
the machine is order.
1)If drill is still aligned after rotating 180°,
then the drill is OK.
Insert drill bit to be checked. Align
cross hair and push 180°. Index button.
2)If drill is still aligned after rotating 360°,
then the index is accurate.
UNION TOOL 16

MDP-15
9. Others
9-1. Drill Well
1) Type of Drill Well
a. V-type Drill Well: The section of this drill well is 90º V-shape.
This drill well alone can allow for the use of several different sizes of drill bits.
b. U-type Drill Well: The section of this drill well is U-shape.
This can be used only for one size of drill bit. Since the bit height is fixed, ideal helix angle can be obtained.
2) Indication of Drill Well
Example-1 (U-type Drill well for Φ0.25 undercut drill)
10 - U - 0.25 - UC
Indicated only for U-type Drill well
・UC --- for undercut drills
・ST --- for straight drills
・For U-type Drill Well--- Size of Drill
・For V-type Drill Well--- Number of V-type
(See 3) chart below)
・U--- U-type Drill Well
・V--- V-type Drill Well
For MDP-10
・Example-2 (V-type Drill well for Φ0.6 drill)
10 - V - 2
No. 2 (Size Range Φ0.5~Φ0.79)
V-type Drill Well
For MDP-10
3) V-type Diameter Size Ranges
Number Size Range Indication
1 0.3 ~ 0.49 10-V-1
2 0.5~0.79 10-V-2
3 0.8~1.19 10-V-3
4 1.2~1.69 10-V-4
* There is no distinction between ST and UC for V-type drill well.
UNION TOOL 17

MDP-15
4) Marking
a. U-type Drill well
The drill size is marked.
Ex.) 10-U-0.45-ST ---- Marked as [045]
10-U-0.45-UC ---- Marked as [-045]
(UC-type is marked with [-])
b. V-type Drill well
Standard accessories ------- Numbers(1, 2, 3, 4) are marked.
Special items --------------- The drill size is marked.
c. Marking Position
U-type ------- Outside of the drill well
V-type ------- At the side of fixing nut hole for standard accessory.
Outside the drill well for special items
9-2.Diamond Wheels
Although the machine comes with the standard diamond wheels: #2000 for the primary face,
and #1000 for the thinning wheel), change the number of the diamond wheel depending
upon the diameter range.
The mist, which include the chip of GC wheel, will spread in the air when dressing.
Therefore, please wear a dustproof mask when dressing.
Moreover, please ventilate the air if necessary.
10. Standard Accessory List
1. Diamond wheel installment Tool 1
2. Drill Wells 10-V-1 1
3. Allen wrench set 1.5mm,2mm,2.5mm
3mm,4mm,5mm,6mm,8m each 1, total 8
4. Metric wrench set 5.5-7mm,10-12mm,11mm each 1, total 3
5. 1mm Test blank Φ1.0 1
UNION TOOL 18

Record of Revision
Date Instruction Manual No. Content
Dec. 1996 1-122-Y-02-A Enacted
Dec. 2000 1-122-Y-02-B 2nd revision. Precautions regarding the chips and dust