Checkline EDM User Manual
1
CONTENTS
. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Page
1.0 Introduction . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 02
1.1 Complete Kit
1.2 Unpacking
1.3 Tension Ranges
2.0 Overview . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
03
2.1 Operating Elements
2.2 Mounting Special Finger Support
3.0 Taking A Measurement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 04
4.0 Verifying Calibration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
05
4.1 Frequency of Calibration Verification
4.2 NIST Calibration
5.0 Options . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
07
5.1 Air Dashpot Damping
5.2 Memory Pointer
6.0 Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 8
6.1 Dimensions
6.2 Ordering Spare Rollers
7.0 Warranty
The device must not be operated in explosion hazard areas
and must not come into contact with aggressive substances.
Tensions that exceed the tension range of the instrument by
more than 100 % may cause permanent damage to the
movement and must be avoided under any circumstances.
6.0 SPECIFICATIONS
Calibration According to factory procedure
eeeeeeeeeeeeee
Accuracy* ± 1% full scale (FS) or ± 1 graduation on scale
Scale diameter 41 mm
Temperature range 45 to 115 °F (10 - 45 °C)
Air humidity 85% RH, max.
Housing material Die-cast aluminum
Housing dimensions 8.6 in x 3.5 in x 1.7 in (188 x 85 x 45mm)
(L x W x H)
Weight (net) Approx. 1.04 lb. (470 g)
Guide rollers V-grooved
Line Speed 2000 m/min max.
Roller Material Standard hardcoated aluminiummmm
mmmmmmmmm
* Using factory standard materials and procedures. Special calibration using customer sample is available.
Specifications subject to change without notice.
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6.2 Spare Rollers
You should regularly inspect
the rollers to assure that they
are running easily and smoothly. You can replace the rollers
yourself, as necessary. When
ordering spare rollers, please
indicate the tension meter
model and the serial number
(on the rear side of the tension
meter).
Standard rollers: P/N R1000
6.1 Dimensions
3.94 in. (100 mm)
4000 g range only
3.54 in. (90 mm)
2.95 in. (75 mm)
8.46 in. (215 mm)
WAR NING
WAR NING
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1.0 INTRODUCTION
DX2-EDM Tension Meters are hand-held, mechanical instruments which
accurately measure the running as well as static tensions at the wire used
in wire EDM machines.
The DX2-EDM employs the 3-roller principle for tension measurement where
the outer two reference guide rollers remain fixed during measurement to establish a
wrap angle over the middle sensing roller. The middle roller, acting against an internal
calibrating spring, is displaced relative to the line tension. This displacement is converted to rotary motion to turn a pointer on a scale to give a reading in grams tension.
1.1 Complete Kit
(included in shipment)
• Tension meter
• Special finger support
• Operating instructions
• Carrying case
1.2 Unpacking
Unpack the tension meter
and inspect it for any
shipping damage. Notices
of defect must be filed
within 10 days of receipt
of the tension meter.
1.3 Model Ranges
Tension Roller Calibration
Ranges (cN) Distance (c:c) mm Material
050 - 2000
075 PA: 0.30 mmØ
150 - 2200
075 PA: 0.30 mmØ
100 - 3000 075 PA: 0.30 mmØ
200 - 4000 100 PA: 0.40 mmØ
Operating Instructions behind foam pad.
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5.0 OPTIONS
5.1 Air Dashpot Damping
DX2-EDM Tension Meters incorporate a
moderate amount of movement damping to
smooth out some high frequency tension
fluctuation. However, where process fluctuations
result in rapid pointer swings which make it
difficult or near impossible to read the scale,
an optionally-available Air Dashpot Damping
mechanism can be provided to slow down the
pointer swings to permit a reading. In setting up the mechanism, it is best to set
the damping rate just to the point where a readable pointer results with minimal
pointer swings. The amount of damping is set by turning the small slotted screw
or hex-head screw of the damping assembly located near the guide-roller mounting bracket. The Air Dashpot must be installed at time of original manufacture.
It cannot be added later.
5.2 Memory Pointer
The optional Memory Pointer assembly retains the highest
reading obtained during a measuring period. Before using
the instrument, rotate the knurled pointer knob clockwise
until the “memory” pointer tab contacts the measuring
pointer at zero. During operation and after instrument
removal, the trailing “memory” pointer will hold the
maximum reading until reset with the pointer knob.
Do not set the damping rate too high as this will
damage the instrument.
CAUTION
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