GHC100-2TA FIBER OPTIC CLEAVE TOOL DATASHEET · GHC100-2TA Fiber Optic Cleave Tool ... GHC100-2TA-DS Datasheet . ... clockwise until there is clearance so that a test fiber can be

1. Instructions are general and may be altered to get best cleave performance with your fiber optic cable. 2. Where conflicts exist between these instructions and the OEM process specification the OEM process specification shall take priority. 3. Photos shown are for reference only. Actual cleave tool may differ in features and part number, but the basic operation/process is the same.

GHC100-2TA-DS ©2005 Daniels Manufacturing Corporation Page 1 of 12 REV. A 7/05

GHC100-2TA FIBER OPTIC CLEAVE TOOL DATASHEET

GHC100-2 Fiber Optic Cleave Tool with Case and the following: GHC100-2TA Fiber Optic Cleave Tool GHC100-BFRT Broken Fiber Removal Tool Kit GHC-SCR Styrofoam Cleaning Rod Kit GHC100-2TA-DS Datasheet



FIBER OPTIC CLEAVE TOOL GHC100-2TA 1. OPERATING INSTRUCTIONS

a. Each Cleave Tool is factory adjusted and inspected by the DMC Fiber Optic technician prior to shipment. Additional inspection and documentation is performed by the DMC Quality Assurance Department.

Figure 1: Side view of Fiber Optic Cleave Tool GHC100-2TA

b. To open the fiber clamp and lock it in the open position push inwardly on the release knob as shown in Figure 2.

Figure 2: Open clamp position ready to receive fiber

c. Strip the jacket, strain member and buffer from the fiber to the specified lengths, leaving a minimum of 1.75” bare fiber.

IMPORTANT: Take precautions to adequately collect the stripped cable, strength member, and

cleaved fiber to avoid foreign object damage.



d. Remove the protective cap from the diamond. The diamond and drum assembly will be in the down position as shown in Figures 1 and 2.

e. Insert the fiber into the Cleaving Tool by passing the fiber through the drum/alignment tube until it

stops as illustrated by Figure 3 and further described in Section 4a.

Figure 3: Inserting a fiber into the Cleave Tool

f. Clamping the cable – release the cable clamp set screw (35), open the cable clamp by pressing down

on the cable clamp lever (6). Place the fiber cable in the cable clamp opening and confine the fiber cable by releasing the spring loaded cable clamp lever. Use the cable clamp set screw (35) for additional pressure.

g. Use the fiber clamp (4) to apply tension to the bare fiber by pressing inwardly and upwardly on the

release knob (18); slowly lower the fiber clamp pad down onto the fiber. Leave at rest for five seconds to ensure stability of the clamped fiber, refer to Figure 4 and Section 4. Use tweezers to pre-tension the fiber, if necessary, before releasing the fiber clamp if loose fiber exists.

Figure 4: Applying tension to the bare fiber prior to cleaving

In order to assure that the rubber pad (19) on the fiber clamp (4) grips the bare fiber without slipping, it is necessary to wipe each bare fiber with a tissue dampened with an approved cleaner/solvent. In addition, if slipping is noticed wipe the rubber pad with alcohol or acetone.

WARNING: Follow user safety instructions on alcohol and acetone containers.



h. To cleave the fiber, spin the drum (7) a number of times by using a rapid pulling tangential stroke of

the index finger as shown in Figure 5. The number of turns required depends upon the fiber itself, the diamond position, and the fiber clamp spring tension.

Figure 5: Rotating the drum to cleave the fiber

i. Once a cleave is achieved release the cable clamp (6) and remove the cable.

j. Release the fiber clamp (4) by pressing the release knob (18). Remove the excess fiber by a sliding motion of the index finger away from the tool as illustrated in Figure 6.

Figure 6: Removing excess fiber after cleave

k. Check the endface quality of the fiber (if a cleave checker is available) – if necessary recleave the fiber. (See cleave tool factory adjustment procedure in Section 3a.)

IMPORTANT: Take precautions to adequately collect the stripped cable, strength member, and

cleaved fiber to avoid foreign object damage.

l. Clean diamond frequently as described in Section 3c and as illustrated in Figure 7.



Figure 7: Cleaning the diamond

2. APPLICATION NOTES

a. The proper cleaving of an optical fiber is achieved by the combined effect of the diamond scoring of the fiber and the tension applied to the fiber through the fiber clamp spring force. Each cleaving tool is adjusted by DMC to provide a mirror surface cleave and an endface angle that is suitable for the intended operation.



Figure 8: Exploded view of Fiber Optic Cleave Tool

1. Base 24. Pin 2. Handle 25. Bearing 3. Bracket 26. Torsion Spring 4. Fiber Clamp 27. Spring 5. Cable Clamp 28. Spring 6. Cable Clamp Lever 29. Pin 7. Drum 30. Pin 8. Shaft 31. Set Screw 9. Diamond Cleaver 32. Pin 10. Alignment Tube (bare fiber) 33. Pin 11. Not used in model GHC100-2TA 34. Screw 12. Cover 35. Cable Clamp Screw



13. Spacer 36. Screw 14. Spacer 37. Spring Plunger 15. Bushing 38. Nut 16. Collar 39. Nut 17. Positioner 40. Set Screw 18. Release Knob 41. Set Screw 19. Pad 42. Nut 20. Pad 43. Protecting Cap 21. Nut 44. Set Screw 22. Rubber Washer 45. Pin Dowel 23. Nut 46. O-Ring Seal

3. DIAMOND CONSIDERATIONS

The diamond in the cleave tool is a high precision gem quality chisel blade instrument which will last indefinitely with proper care. Do not allow the diamond to come in contact with hard or sharp objects such as a screwdriver or pliers. Should the diamond be damaged, the diamond cleaver (9) should be removed and replaced (see Section 9).

a. Diamond position adjustments

Adjustment of the diamond is to be accomplished with the drum assembly in place on the cleave tool as shown in Figure 9. The diamond cleaver is to be retracted by rotating the outer adjusting nut (21) clockwise until there is clearance so that a test fiber can be pre-tensioned in the tool impinging slightly on the diamond cleaver (no more than ¼ of the fiber diameter). Turn the inner adjusting nut counterclockwise applying pressure to the optional rubber washer (22) if present. Both adjusting nuts need to be tight in order to produce consistent results. Inspect the angle of the diamond blade to ensure it remains at a 90° position to the fiber.

Rotate the drum. If the scoring is insufficient to obtain a cleave, and it is determined that the tension on the fiber is correct, turn the outer adjustment nut counterclockwise in small increments until a satisfactory cleave is obtained. Keep in mind that an adjustment with one adjusting nut warrants tightening the connection with the other adjusting nut.

Examine the endface to assure that all aspects of the cleave are of acceptable quality.



Figure 9: Diamond position adjustment

b. Diamond edge quality A sharp scoring chisel edge is provided by the precision gem quality diamond blade. The diamond should be examined regularly using a 10X magnification or greater power optical viewing device. If the diamond is chipped, dull or broken, remove the diamond cleaver (9) and replace with a new diamond cleaver.

c. Diamond cleanliness

The pressed Styrofoam cleaning rod has been specially produced in a quality that is suitable for cleaning the diamond cleaver (see Figure 7). Follow these instructions after each use.

1. Bevel the tip of the rod to a 45° angle with an oil-free single edge razor blade. 2. Dip the tip of the rod in absolute alcohol (ethanol) and shake off any excess. 3. Slightly press the diamond’s cleaving edge into the cleaning rod as shown in Figure 7. The diamond

edge and the rod edge are at 90° to one another. Pass the rod along the entire length of the diamond, cleaning both faces of the diamond simultaneously.

4. Repeat the process using a different portion of the rod.

NOTE: Although it may not be necessary to clean the diamond after each cleave, it is imperative to keep the diamond clean. Operator discretion is advised.

4. FIBER TENSION

a. Fiber pretensioning Fiber pretensioning is necessary to hold the fiber taut during the scoring/cleave cycle. This tension is accomplished by spring (28) when fiber clamp (4) is released (see Figure 4). The spring force can be set by adjusting set screw (41) and lock nut (42) within the range of 150 to 250 grams. This spring force is set by DMC during the initial adjustment process.



b. Spring adjustment/replacement Remove fiber clamp (4) from tool base (1) by releasing top set screw (31). Gently pull the fiber clamp (4) outwardly and replace spring (28). Reverse the procedure to reassemble. Readjust set screw (41) and lock nut (42) to the desired spring force (see Figure 10).

Figure 10: Fiber clamp tension adjustment

5. CLAMPS

a. Fiber clamp force Spring (27) (see Figure 8) provides the fiber clamping force. This spring has been installed during manufacturing and covers a broad range of fiber optic cleaving applications from 125 to 425 microns.

b. Fiber clamp lock mechanism

Fiber clamp (4) opens and locks by pressing on knob (18). If readjustment of the locking mechanism is desired release lower set screw (31) and relocate collar (16) (see Figure 8).

c. Cable clamp adjustment

The cable clamp lever (6) opening is adjusted by cable clamp screw (35). If additional pressure is required to secure the cable and prevent fiber slippage in the cleaving area, cable clamp screw (35) may be used to apply additional pressure to grip the cable tighter.

Your cleave tool can be adjusted to accept a wide variety of fiber optic cables.



6. DRUM ADJUSTMENTS a. Drum concentricity

The procedures described in this section are intended for use within a Fiber Optic Laboratory when the most exacting drum alignment is required.

To check for concentricity of the drum and cleaving mechanism follow this procedure:

Strip the fiber optic cable in accordance with strip lengths indicated in the termination specification or process being used (1.75” minimum bare fiber required) and insert it into the drum assembly. Keep fiber clamp (4) open by not releasing knob (18). Rotate drum (7) so that the diamond cleaver (9) is in a horizontal position as shown in Figure 11.

When the diamond cleaver is adjusted to the fiber, the diamond will impinge upon the fiber approximately ¼ of the fiber diameter. Figure 11 illustrates the deflection of the fiber as the drum is rotated 180° from positions a to b.

Figure 11: Setting up drum for concentricity test

Referring to Figure 12, visually examine the deflection under 10X magnification. If there is a visually detected difference between C1 and C2 follow this procedure to bring into alignment.

Release nut (39) and rotate shaft (8) in small increments until C1 and C2 are equal.

Retighten nut (39). Any minute differences in concentricity will now be balanced by the fiber clamp (4).

Figure 12: Concentricity test



b. Clearing and changing fiber alignment tubes Alignment tubes can be cleared and/or replaced if they become blocked by debris. DMC supplies a Broken Fiber Removal Tool Kit (GHC100-BFRT) which can be used to clear a blockage prohibiting fiber insertion (see Section 7b). If debris is unable to be cleared the alignment tube may be replaced.

7. CURVED FIBER

a. Curved Fiber Occasionally a fiber exhibits a permanently induced curvature from spool winding. If a curved fiber is to be cleaved it must be positioned with the curved end of the fiber pointing down into the fiber clamp (4) as illustrated in Figure 13.

Figure 13: Cleaving a curved fiber

b. Jamming If alignment tube (10) becomes obstructed, the broken fiber removal tool (GHC100-BFRT) should be used to clear the obstruction. When the condition is encountered, make sure the diamond cleaver (9) is fully protected before attempting to clear the tubes. Use the removal tool to probe from either end through the alignment or entry tube until the obstruction is removed.

IMPORTANT: Do not attempt to place any object larger than Ø.009” into the drum/alignment tube.

c. Retractable handle To release the handle, pull plunger 37 and pivot the handle (2) to the extended hand held position. Set screw (40) provides a stop for the handle in the open position (see Figure 8).

d. Serial number

All Fiber Optic Cleave Tools are serially numbered when manufactured. This number should be referenced when corresponding with DMC regarding your unit.

e. Diamond protection

When the Cleave Tool is not in active use, always protect the diamond by sliding on the protective cap (43).



f. Warranty Limited

Warranty Daniels Manufacturing Corporation warrants each new unit sold by it to be free from defects in material and workmanship under normal use and service. Its obligation under this warranty is limited to the free correction or, as its option, the refund of the purchase price of any such unit which proves defective within ninety (90) days after delivery to the first user, provided that the unit is returned to it with all transportation charges prepaid and which shall appear to its satisfaction, upon inspection by it, to have been defective in material or workmanship. This warranty shall not cover any damage to such products, which in the opinion of Daniels Manufacturing Corporation, was caused by normal wear, misuse, improper operation or accident.

DANIELS MANUFACTURING CORPORATION IS NOT LIABLE FOR CONSEQUENTIAL OR SPECIAL DAMAGES OF ANY NATURE OR KIND RESULTING FROM THE USE OF ANY OF ITS PRODUCTS. This warranty is in lieu of all other warranties express or implied. No warranty, expressed or implied, is made or authorized to be made or assumed with respect to products of Daniels Manufacturing Corporation, other than that herein set forth.

Documents

GHC100-2TA FIBER OPTIC CLEAVE TOOL DATASHEET · GHC100-2TA Fiber Optic Cleave Tool ... GHC100-2TA-DS Datasheet . ... clockwise until there is clearance so that a test fiber can be