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18

NC Rotary Table

7. 구성품 설명 및

  유지보수·조정

7. Description, maintenance and

  adjustment of components

7-1  웜기어의 백래시 조정

7-1  Adjustment of wormgear Backlash

웜샤프트 및 웜휠에는 특수한 재료를 사용하여 극히 정밀한 가공으로 우수한
정도를 갖게 합니다.
웜샤프트, 웜휠의 백래쉬 제거 방법으로서 듀얼리드 웜(DUAL LEAD
WORM)을 사용하고 있습니다. 이것은 웜샤프트의 좌우 치면의 리드를 다르
게 변경하여 웜샤프트를 축방향으로 이동시켜 웜휠의 백래쉬를 조정하게 됩
니다.

이 듀얼리드 웜 방식은 가장 이상적인 치면의 백래쉬를 미세하게 조정할 수
있고 이론적으로도 실제적으로도 가장 정확한 백래쉬 조정이 가능합니다.

웜기어의 백래쉬는 출하 시에 적정치로 조정되어 있지만 장시간의 사용중에
는 조정이 필요한 경우도 있습니다. 백래쉬 적정치는 아래 [표5]에 기재했습
니다. 이 값은 기계 냉각 시, 즉 장시간 휴지 후에 상정한 값입니다. 따라서 장
시간 연속 운전한 경우에는 열팽창에 의한 값보다 백래쉬는 작아집니다.

The worm shaft and the worm wheel are manufactured withsuperior 
materials under a precision process. A dual-lead worm is applied as a 
countermeasure against the backlash of the worm shaft and the worm 
wheel. This method is implemented with a differentiated lead between 
the left-and right-hand teeth surfaces of the worm shaft, which shifts the
worm shaft towards the spindle.

This dual-lead worm method is acknowledged as the best method 
both theoretically and practically. It enables very fine adjustment of the 
backlash of the teeth.

The backlash of the worm gear was adjusted appropriately at the 
factory; however, readjustment may be necessary after a long period of 
operation. The table below presents the optimal value of the backlash. 
The value is measured when the machine has cooled down, some time 
after shut down. Consequently, the real backlash value after a period
of operation is less than the optimal value due to thermal expansion.

Worm gear will not move if backlash is excessively low.

Measure backlash before adjusting.

!

CAUTION

!

CAUTION

주 의

백래시가 너무 작으면 웜 기어가 움직이지 않습니다.

※ 적합한 백래쉬 / Appropriate Backlash

백래시를 조정하기 전에 다음 방법으로 현재 백래시를 측정 후에 백래시를 
조정합니다.

1)  테이블 상면의 T-SOLT 측면에 다이얼게이지를 셋트합니다.
2)   테이블 상면의 탭홀(TAP HOLE)을 이용하여 평강(평평한 강철) 또는 환봉

을 넣고 테이블을 천천히 회전시켜 웜휠의 치가 웜샤프트에 꼭 끼는 위치
에서 손을 떼고 다이얼게이지의 값을 알아냅니다. 다음에 반대방향에 동일 
조건으로 웜샤프트에 치가 꼭 낄 때까지 회전시킵니다. 이때의 측정값의 차
가 백래시량입니다.

3)   상기 측정은 테이블을 회전시켜 45°마다 8개소에서 실시하고 앞서 기록

한 적정값과 비교해 주십시오.

   적정값보다 빗나가는 경우에는 이하에 나타낸 요령으로 조정해 주십시오. 

백래시의 최소값이 앞에 기재한 적정값으로 되도록 조정해주십시오.

  (그림 5)

1)  Set a dial gauge on the side of the T-SOLT on top of the table.
2)   Insert a steel plate or rod into the tap hole on top of the table, then turn 

the table slowly. When the teeth of the worm wheel contact the worm 
shaft firmly, stop turning and read the measurement on the dial gauge. 
Turn the table in the opposite direction until the work wheel teeth con-
tact  the  worm  shaft  firmly,  and  read  the  dial  gauge.  The  difference 
between the two values is the backlash.

3)   Perform the above measurement 8 times at every 45°position of the 

table. Compare the measurements with the optimal value presented 
earlier. Adjust the deviation from the optimal value by the following pro-
cedures. Adjust the backlash so that the minimum value is the same as 
the optimal value. (Fig 5)

7.1.1. 웜기어의 백래시 측정

7.1.1. Method of Measuring Worm Gear Backlash

테이블 형식 / Appropriate backlash

SR-200

SR-250

테이블 끝단에서의 원호 길이 [㎛]

/ Length of the arc from the tip of the tabl

13~38

13~41

중심에서 반경

/ Radius from the center

피치원 반경[mm]

/ Pitch circle radius

76.5

91

테이블 끝단[mm]
/ Tip of the table

105

125

[ 표 / Table 5 ]

Содержание SR-200

Страница 1: ...Maunted Series Instruction Manual SR 200 SR 250 1 Please read the DANGER and Warning sections before operating the NC Rotary Table Please keep this manual handy as it may answers to any questions you...

Страница 2: ...2 NC Rotary Table...

Страница 3: ...tion Warning term DANGER WARNING CAUTION IMPORTANT DANGER WARNING CAUTION IMPORTANT Indicates an imminently hazardous situation which if not avoided will result in death or serious injury These warnin...

Страница 4: ...14 4 3 1 Air Clamp System 1 4 4 4 Air Purge System 15 4 5 15 5 16 5 1 16 5 2 16 6 16 6 1 NC Rotary Table Clamp 16 6 2 Clamp Unclamp 17 6 3 Clamp Unclamp Solenoid Valve 17 7 18 7 1 18 7 1 1 Worm Gear B...

Страница 5: ...ion 1 6 5 2 Periodic Inspection 1 6 6 Description of the NC Rotary Table 16 6 1 Cautions for the Table Clamp 1 6 6 2 Clamp Unclamp Check Device 1 7 6 3 Solenoid Valve for Clamp Unclamp 1 7 7 Descripti...

Страница 6: ...machinery and the controllers for installation prior to start installation maintenance or repair of the tilting NC rotary table Loose clothing or limbs may get caught during operation Tighten the bol...

Страница 7: ...y workpieces Damage may occur Excessively long or heavy workpieces may result in them being thrown from the rotary table NC Do not exceed the allowable cutting force Product may be damaged and or work...

Страница 8: ...Use eyebolts and wireropes when moving the NC rotary table Dropping the rotary table will cause damage and possibly injury CAUTION CAUTION 6 NC Change the lubricant every six months Actual change cycl...

Страница 9: ...ompressed air through the air combination lubricator mist separator regulator drain the com pressed air inlet is located on the motor case Drain air filter regularly an auto drain system is recommende...

Страница 10: ...earance drawing The maximum table rotation speed is the value at Motor 3000min In order to meet the specifications of the motors attached with absolute encoders the starting point origin of the machin...

Страница 11: ...value Model 1 Run out of Table face in rotation 0 020 SR 200 SR 250 2 Parallelism between center of hole and Base 0 020 3 Squareness between Table face and base 0 020 at Table Dia 4 Center hole run ou...

Страница 12: ...he gap between the T slot and the guide block is large install the product close to either side of the T slot 4 Use a clamping device to securely fasten the NC rotary table to the machine tool 4 1 1 4...

Страница 13: ...he old oil and do not allow any debris of foreign material to enter the tank If contaminated with foreign material the bearings may become stuck and accuracy may diminish Use the following lubricant R...

Страница 14: ...oil dust removed page 9 2 Connect the air hose to the air inlet The air inlet PT 1 4 is located on the motor casing See the outside drawing for installation 3 The supply pressure of the air should be...

Страница 15: ...thus air pressure is applied to the motor cover As such the air exit must be kept open When the air is discharged out the operator can hear the sound The hydraulic clamping system requires an addition...

Страница 16: ...amaged cable 3 Corrosion open circuit in the motor casing CAUTION CAUTION CAUTION The Rotary Table must be rotated while unclamped and processing after positioning must be performed while clamped Inco...

Страница 17: ...g are as follows which must be taken into consideration into the electric wiring Solenoid ON table unclamp Solenoid OFF table clamp 6 2 6 2 Clamp Unclamp Check Device 4 To prevent mistakes be sure to...

Страница 18: ...eration is less than the optimal value due to thermal expansion Worm gear will not move if backlash is excessively low Measure backlash before adjusting CAUTION CAUTION Appropriate Backlash 1 T SOLT 2...

Страница 19: ...using hands Insert a T wrench into the hexagonal recess of the worm shaft Note refer to Worm Gear Backlash Adjustment page 18 of this manual The backlash is reduced when the housing is turned clockwis...

Страница 20: ...eripheral devices of the table to confirm that the adjustment is satisfactory HOUSING PLUG O RING O RING OIL CAUTION When installing the housing plug take care not to damage the O ring Fig 6 IMPORTANT...

Страница 21: ...o motor please be careful O ring is not lost or damaged there is o ring so that foreign matter does not enter 5 After disassembling Key and ring is decomposed with gear replace the motor 6 Assemble th...

Страница 22: ...and cutting fluid from the Table completely and put it on rigid wooden plate to maintain accuracy Apply rust preventive oil to the Table and case or protect them with a wooden cover or wrap them with...

Страница 23: ...mulated pitch error of 0 05 with Equation 2 yields Therefore the angle is 206 seconds or three minutes and 26 seconds As illustrated above the lengths and the angles of the peripheral devices are conv...

Страница 24: ...8 C1 706 Samchully Machinery 405 820 99 TEL 032 822 4811 FAX 032 822 4377 405 820 99 Namdong daero Namdong gu Incheon TEL 82 32 899 8965 FAX 82 32 721 7607 1544 3122 NC NC Rotary Table Rear Maunted Se...

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