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  9. Koden DM - 682/684 User manual

Koden DM - 682/684 User manual

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0
February 9, 2009
Drilling Monitor
DM – 682/684
DM – 602/604
Instruction manual for repair and inspection
Document No. C25EHZ0100
Koden Electronics Co., Ltd.
1
Measuring instruments to be prepared:
The following instruments shall be prepared for inspection:
(1) Variable voltage transformer: Variable between 80 - 280 V with 150 VA or more
(2) Ammeter: AC: 0 – 10 A, DC: 0 - 2 A
(3) Digital voltmeter: AC: 0 – 280 V, DC: 0 – 300 V
(4) Frequency meter: 10 Hz – 10 MHz
(5) Oscilloscope: DC: 0 – 50 MHz 2 CR. With 10:1 probe
Confirmation of each block:
This drilling monitor can be divided into the following blocks and each block shall be confirmed:
a. Recorder : Power supply unit: Various power circuits
Motor driving circuit
Paper feed motor driving circuit
Overvoltage protection circuit
b. Recorder: Logic
c. Recorder: Transmitter and receiver
d. Interlock with winch:
e. Fixing of data plates and others:
2
External views and dimensions
1. Recorder unit (External view)
2. Winch unit (External view)
3
Recorder
a. Adjustment of belt driving part
a-1 Loosening the mounting screws of driving motor, adjust the mounting position of the driving
motor. Rotate the driving motor by hand and adjust the tension of the belt to have
approximately ± 0.5 mm deflection.
b. Confirmation of rotation signals of the belt and tension of the belt
Rotation detection part (P.C.B. HOLE 100 Mo) shall be as shown below:
Adjustment method for tension of the belt
Fix the rotation detection PCB to have 0.8 mm ± 0.03 mm gap between the hole IC and the
magnet without up-and down of out-of alignment.
A
xis of driving pulley
⋆± 0.5 mm
Mounting screws of driving
moto
r
A
xis of driving moto
r
Mounting screws
Loosen the screws c.
Turn the bolt dto
adjust tension of the
belt.
Pulley
Loosen screw
Tighten screw
Belt
HOLE_P.C.B.
4
3. Accuracy (Horizontal direction)
3-1. Receiving clock
a. Set the scale of “Range calibration control dial” on the control panel at 8.
b. Connect a frequency meter to TP-22 on 7000 PCB (for DM 602/4, TP-23 on C25-7000B PCB)
(Use a probe of 10:1)
c. Turn the slug of L1 (KT-800) to set at 3,000 MHz
(When there are 2 or more setting points, set at the point with more slug dropouts)
d. After completion of setting in above c., turn the “Range calibration control dial” to “0” and “10” to
confirm the following values:
Specification: At position “0” of the dial: 2.550 MHz or less
At position “10” of the dial: 3.150 MHz or more
3-2. Confirmation of recording accuracy
Confirm that the line gap of each marker is 5 mm for full width of recording paper. When there are
many errors, vary the VRI on 6000 PCB to set correctly.
Specification of accuracy: 5 ± 0.1 mm
3-3. Confirmation of recording uniformity
Confirm that there is no fluctuation as shown above.
Specification of accuracy: within ± 0.1 mm
Switching on “Manual mark switch”
5
4. Rejection of oscillation lines
Turn on the “Oscillation line rejection switch”.
Confirm that oscillation lines will disappear as shown below (Switch off after confirmation)
5. Operation of zero position setting switch (Set at 009 cm)
a. Vary the TD Width switch on sub-panel.
b. Confirm that the gap of oscillation lines will expand responding to the variance, and set it at 009
cm after confirmation.
6. Operation of test mode
6-1. After the “Mode switch” on sub-panel is turned to “Test” side, confirm that false signals will be
recorded as shown below. After conformation, turn the switch to “MEAS” side.
Oscillation lines
Gap between oscillation lines
False signals
False signals
Setting ranges: ○
A< 0.5 >, ○
B< 1.0 m >, ○
C: < 2.0 m >, ○
D: < 4.0 m >
6
6-2. Turn on the “Signal processing switch” on sub-panel, and connect the oscilloscope to the terminal
TP-REC of 6000 PCB. Set the below setting with VR3 1 kΩ.
After confirmation, turn the switch to off side.
Thick
Thin Standard: ± 10 V
120 V (variable range)
7
7. Operations of RANGE and SHIFT, and status of write-in of recoded letters
7-1. Confirm that numerical figures and characters will be displayed at every switching-over of “RANGE”
and “SHIFT” switches.
Displaying locations:
DM-682/602: Recorded at the right side
DM-684/604: Recorded at the center
Example: R = 2 M, S = 0 %, X
Range switch Shift switch 682 Direction switch
Confirm that letters are not distorted. In the case of 682/602, confirm also with “Direction” switches
for X and Y.
Example of location and recording of “Shift” switch:
Record A: < 0 % >, Record B: < 50 % >, Record C: < 100 % >
The relations between positions and ranges of records for “Range” switch and “Shift” switch are as
follows:
Shift
Range
0 % 50 % 100 %
0.5 m Radius to 0.5 m Radius 0.25 ~ 0.75 m Radius 0.5 ~1.0 m
1.0 m Radius to 1.0 m Radius 0.5 ~ 1.5 m Radius 1.0 ~ 2.0 m
2.0 m Radius to 2.0 m Radius 1.0 ~ 3.0 m Radius 2.0 ~ 4.0 m
4.0 m Radius to 4.0 m Radius 2.0 ~ 6.0 m Radius 4.0 ~ 8.0 m
The set up range and shift values will be recorded at the right side.
Record A
Record B
Record C
3rd echo Center of record 3rd echo
Record on walls Oscillation lines Record on walls
The part of “a”.is missing from “Record A”.
The
p
art of “b” is missin
g
from Record B.
2nd echo
2nd echo
8
8. Paper feed
8-1. Paper feed speed operation “Const”
Turn on the “Paper speed” switch to Const 60, 30, 15 and 7.5 mm/min, and confirm the feed width of
paper per one minute.
Specification: At 60 mm/min: ±2 mm
At 30 mm/min: ±1 mm
At 15 mm/min: ±0.5 mm
At 7.5 mm/min: ±0.25 mm
8-2. Confirmation of paper feed movement proportional to depth (When sensor stops, paper feed will also
stop.)
a. Lift and lower the sensor at a slow speed.
b. Setting the UP/STOP/DOWN switch at 1/40, operate for more than 1 minute.
The gap for 1 m mark shall be 25 mm.
c. Setting the UP/STOP/DOWN switch at 1/50, 1/100 and 1/200, confirm as above.
At 1/50, the gap of 1 m mark: to be 20 mm
At 1/100, the gap of 1 m mark: to be 10 mm
At 1/200, the gap of 1 m mark: to be 5 mm
The “SPEED control” switch shall be set at the position
shown at left.
9
9. Operation of hole wall diameter marks
a. By turning the “Width marker” switch on right panel, it shall be confirmed that the records of
dotted lines will change.
b. The gap between hole wall diameter marks shall be confirmed to be matched with the set value
(see above figure). The set values are as follows:
Range Shift Set value of hole
wall diameter mark
Variance of hole
wall diameter mark
0.5 m 0 % 1 – 9 cm 1 cm gap
1 m 0 or 50 % 1 – 2 m 10 cm gap
4 m 0 or 50 % 1 – 9 m 1 m gap
c. It shall be confirmed that the dotted lines will be shifted to right or left depending on the operation
of L – R Shift switch (see above figure).
d. Connect the encoder for recording to pin Nos. 7 and 14 of the Winch connector as follows:
e. At switch ○
1of 7000 PCB, Nos. 1 and 8 shall be ON, and at switch ○
2, Nos. 1 and 8 shall be
also ON.
For DM 602/4, S3, S4 and S5 of C25-700B PCB will be 3E8.
Encoder Winch
Set value is 99.
Hole wall diameter mark
Set value