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Sharp VH-25 Series Operator's Manual
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Sharp VH-25 Series Operator's Manual

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OPERATOR'S
MANUAL
VH-25 Series
LC-20VSG
SHARP INDUSTRIES, INC.
310-370-5990
edition : A02

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  • Page 1 OPERATOR’S MANUAL VH-25 Series LC-20VSG SHARP INDUSTRIES, INC. 310-370-5990 edition : A02...

  • Page 2: Table Of Contents

    OPERATOR’S MANU` A L CONTENTS 、 FORWORD 、 Safety Rules and Regulations 、 Capacity 、 Specifcations of 20 Series of Milling Machine 、 Machine Body 、 Stepless Speed Headstock (20VS,20VA,20VAG,20VHA) Name of Machine Parts Headstock Lubrication Operations Trouble Shootings P 10 、...
  • Page 3 OPERATOR’S MANUAL MODIFICATION RECORDS DATE PAGE ORIGINAL MODIFIED MEMO 2010.6.7 FIG 54 P 3 / 3...

  • Page 4: Forwordp

    OPERATOR’S MANUAL 1. FORWORD LONG CHANG 20 SERIES OF MILLING MACHINES are designed and manufactured to meet the demands by most of out customers. All parts and materials have beer placed under strict quality control to ensure the machine quality superiority and permanent service life.

  • Page 5: Specifcations Of 20 Series Of Milling Machine P

    OPERATOR’S MANUAL 4. Specifcations of 20 Series of Milling Machine: STANDARD SPECIFICATIONS : MODEL LC-20VS LC-20VA LC-20VB LC-20VC Table Working Surface 1300x260mm Longitudinal travel 970mm Cross travel 420mm Vertical travel ( knee ) 450mm Motor Vertical spindle motor 3HP 4P 3HP 4P Weight 1400kg...
  • Page 6 OPERATOR’S MANUAL STANDARD SPECIFICATIONS : MODEL LC-20VSG LC-20VGA LC-20VHS LC-20VHA Work table Working Surface 1300x260mm 1300x260mm Longitudinal travel 790mm 790mm Cross travel 420mm 420mm Vertical travel ( knee ) 420mm 420mm Longitudinal feeds 22-690/min 22-690/min Longitudinal rapid traverse 2100/min 2100/min Vertical fdde ( knee ) 800/min 800/min...

  • Page 7: A 、 Stepless Speed Headstock (20Vs,20Va,20Vag,20Vha) P

    OPERATOR’S MANUAL 5. Machine Body A、 Stepless Speed Headstock (20VS, 20VA, 20VSG, 20VAG, 20VHA) a. Name of Machine Parts : FIG.1 P 4 / 57...

  • Page 8: Headstock Lubrication P

    OPERATOR’S MANUAL b. Headstock lubrication : Adopted with dripping lubricant in the headstock, it is to reassure driving machanism and smooth slidings. Please refer to the chart as hereunder specified. FIG.2 Item Position Lubricant Time(s) Q’th Headstock Matching Quill Holes KUOKUANG R-68 Twice Daily Full...

  • Page 9: Operations P

    OPERATOR’S MANUAL c. Operations : 1、 Spindle brake : brake lever (E) When arrow mark in (D) position, spindle motor power is on. When arrow mark in (C) position, spindle motor power off through the engagment of micro switch. When arrow mark in (B) position, make spindle braked.The lever is cam operated and will never return back until you push it.
  • Page 10 OPERATOR’S MANUAL 3、 Quill feed : a. Manual feed : Turn the feed rate selector to any of the two “DUMMY” position. Engage feed trip lever from (B) to (B’) The quill is now under handwheel (G) control b. Automatic feed : Ensure quill lock is off (C) Set micrometer dia to required depth, (D) Engage Feed Clutch Selector (E)
  • Page 11 OPERATOR’S MANUAL 4、 Speed change of spindle : By means of the variation of one set of sliding belt pulley and counter shaft gear (high or low speed), the spindle revolution speed is changed accordingly. Change of high and low speeds : (Fig 4) Brake the spindle Push and Turn lever (H) in either direction to the next horizontal.
  • Page 12 ` O PERATOR’S MANUAL 5、 Tilting of headstock 20VS 20VSG 20VHS Cross tilting (Fig 6) a. Draw out 2 zero position securing taper pins. b. Loosen 4 lock nuts ( A ). c. Turn the worm shaft ( B ) so as to tilt the head stock to the desired position. Lock up 4 lock nuts ( A ) evenly.

  • Page 13: Trouble Shootings P

    OPERATOR’S MANUAL d. Trouble Shootings : 1、 Dismantling of 20VS, 20VA, 20VB, 20VSG, 20VGA, 20VHS, 20VHA, Motor (Fig 9) : Start the motor and turn the speed change handwheel ( A ) to the position of 60 RPM appeared on the indicator to lower down the stationary motor varidisc to the lowest position.
  • Page 14 OPERATOR’S MANUAL FIG.9 2、 Replacement of speed change belt ( R ) (Fig 10) P 11 / 57...
  • Page 15 OPERATOR’S MANUAL a. Please refer to Step a to e on motor dismantling. b. Pull out drawbar ( 1 ) . c. Take off three concave hexagonal bolts ( 1 ) and use two of them to push up the bearing cover ( K ).
  • Page 16 ` O PERATOR’S MANUAL FIG.10 3、 Replacement of brake block (Fig 11,12) : P 13 / 57...
  • Page 17 OPERATOR’S MANUAL a. Refer to Step a to e on motor dismantling. b. Refer to Step b to g on replacement of speed change belt to dismantle the upper belt housing. c. Remove the spindle pulley off. d. Use flat head screw driver to kick-off the two half piece of brake shoe ( A ). e.

  • Page 18: B 、 Headstock (20Vb,20Vc) P

    OPERATOR’S MANUAL B、 EADSTOCK : 20VB, 20VC a. Names of Machine Parts : 1、 20 VB Headstock : FIG.13 P 15 / 57...
  • Page 19 OPERATOR’S MANUAL 2、 20 VC Headstock : FIG.14 P 16 / 57...

  • Page 20: Headstock Lubrication P

    OPERATOR’S MANUAL b. Headstock Lubrication : 1、 20 VB Headstock : FIG.15 Item Position Lubricant Time(s) Q’th KUOKUANG R-68 Head Stock Matching Quill Holes Twice Daily Full ESSO FEBIS K53 Twice Bull Gear Bearing Sleeve GULF WAY 52 Full Weekly VACTRA NO.2 Counter Shaft Gear Worm Gear Cradle Once Daily...
  • Page 21 OPERATOR’S MANUAL 20 VC Headstock : 2、 Proper lubrication is to ensure the precision degree and longer service life of the machine. FIG.16 FIG.17 Item Position Lubricant Time(s) Q’th KUOKUANG R-68 Twice 5-10 Clutch and Bearing Sleeve Weekly Drops ESSO FEBIS K53 Head Stock Matching Quill Holes GULF WAY 52 Twice Daily...

  • Page 22: Operations P

    OPERATOR’S MANUAL c. Operations : 1、 Reversing Switch : Motor turning is controlled by the reversing switch ( Vide the Fig in the right ). When the high-low speed change lever is placed at the high gear position and the switch is on FOR, the motor turns clockwise.
  • Page 23 OPERATOR’S MANUAL 2、 Chucking of Tooling Shank and Dismantling : First the spindle must be rasid up to its maximum height. The screw of draw bar is right turn. When the screw is turned clockwise, it is for locking of tooling shank, and vice-versa. To take out the tooling shank, the drawbar must be turned from three to five rounds.
  • Page 24 OPERATOR’S MANUAL Cross Tilting Loosen evenly the four lock nuts ( R ) and turn the worm shaft ( S ) until the desired angle is secured. Then lock up the lock nuts ( R ) everly. Note : Do not loosen the lock nuts ( R ) totally during the adjustment. Fig.21 P 21 / 57...
  • Page 25 OPERATOR’S MANUAL 4、 Manual Feed : 20VB, 20VC The manual feed lever is installed on the-right side of headstock ( Fig 22, H ). The spindle will travel vertically when the lever is turned. There are 12 positions to be chosen.
  • Page 26 OPERATOR’S MANUAL 5、 Automatic Feed : ( 20VB, 20VC ) For automatic feeding, please take the following steps : a. Loosen the quill lock ( L ). b. Turn the power feed transmission engagement crank ( I ) from “OUT” to “IN” position. Make certain to engage the worm gear cradle with the spindle gear hub so that the driving will be directed from the spindle worm and worm gear before it is passed to the speed change gears.
  • Page 27 OPERATOR’S MANUAL A、 Trouble Shootings: 1、 Repiacement of V-Belt and Timing Belt of LC-20VC Miller: Take up the wire grip and reversing switch. Take off the side cover of belt wheel housing. As illustrated Fig.25, loosen adjusting motor handle ( B ) and move the motor forward to loosen the belt.
  • Page 28 OPERATOR’S MANUAL 2、 Replacement of Brake Block It is the same with the replacement step a to g of V-Belt and timing belt to take out the belt housing (F). Take off two M3 setting screws (J), two convex ring screws (K) and convex ring (L). Separate the belt housing (F) and front belt pulley set (M) and take out the four pressure springs (G).

  • Page 29: Machine Body

    OPERATOR’S MANUAL 6. Machine Body A、 Names Of Machine Parts : a. Machine Body, Turret, Ram And Bracket : P 26 / 57...
  • Page 30 OPERATOR’S MANUAL P 27 / 57...

  • Page 31: B 、 Machine Lubrication P

    OPERATOR’S MANUAL B、 Machine Lubrication : a. Horizontal spindle, spindle bearing, and horizontal milling cutter arbor sleeve : ( 20VHS, 20VHA ) Lubrication of horizontal spindle drive gear and gear housing is of dipping and aplashing. The horizontal spindle bearing lubrication adopts the forced automatic one. The milling cutter arbor sleeve is lubricated by oil dripping.
  • Page 32 OPERATOR’S MANUAL b. Lubrication of sliding surfaces of work table, saddle, base and gib : ( 20VSG, 20VGA, 20VHS, 20VHA ) ( 20VS, 20VA, 20VB, 20VC ) Position Lubricated Parts Lubricant Frequency Q’ty KUO KUANG R-68 ESSO FBIS K53 Sliding surface of work table, 3-5 times daily by Filled up to ( A ) Inlet...

  • Page 33: C 、 Operations P

    OPERATOR’S MANUAL C、 Operations : 1. Cautions prior to operations : a. Check and see if the motor voltage is conformed to that of the power source. b. Check and see if the power indicator lamp ( B ) is light the electric box is connected with the power source.
  • Page 34 OPERATOR’S MANUAL （C）Vertical spindle power ON switch （D）Vertical spindle power OFF switch （F） Vertical Spindle Cw. Ccw Select Switch （G） Horizontal Spindle Power On Switch （H）Horizontal spindle power off switch （I） Table power feed power ON switch （J） Table power feed power OFF switch （K）Table power feed Hi/Low select switch （L）Cooling select switch （M）Electric source ON / OFF switch...
  • Page 35 OPERATOR’S MANUAL 3. Movement and turning of ram: Ram Movement : a. Loosen the two ram set bolts（A&B） b. Turn the crank lever to move the pinion bolt （C）for the desired position of ram. c. Lock the end set bolt（B）at the rear end of ram before setting the lock bolt （A）at the front end.
  • Page 36 OPERATOR’S MANUAL 4. Convertion from vertical to horiziontal milling : a. Use an open-mouth spanner to loosen the four nuts（E）. b. Push the ram manually and the turret by 180 degrees until the zero position aligned at the marking. Then, insert the taper pin（G）to secure the positioning. Lock up the four lock nuts （E）.
  • Page 37 OPERATOR’S MANUAL 5. Speed change of horizontal spindle a. By means of speed selector （A）, The six speed horizontal spindle may turn from 45 to 980 rpm（50Hz）or 55 to 1, 180 rpm（60Hz）. b. Whenever the gear shifting is handicaped, push the jog button（O）for instant turning of horizontal spindle to engage the gears easily.
  • Page 38 OPERATOR’S MANUAL 7. Setting of sliding surfaces of work table, saddle, base and gib. 8. All non-feed sliding surfaces shall be secured and set to prevent slipping and increase machine body’s rigidity. The sliding surface setting levers are clockwise for setting and counterclockwise for release.
  • Page 39 OPERATOR’S MANUAL 10. Replacement of v-belt of horizontal spindle: a. Disconnect the power source. b. Take off the two rear cover of machine body. c. Loosen the four hexagonal bolts ( A ) on the motor mount. d. Take out V-belt ( B ). e.

  • Page 40: D 、 Adjustmentp

    OPERATOR’S MANUAL D、 Adjustment 1. Steps in Backlash Adjustment of Upper Leadscrews: a. Use an L-shape hexagonal spanner and perform the micro adjustment on adjusting screw ( B ) as arrowed on the plate.Meanwhile, turn the Long feed handwheel slignhtly until a slight resistance is sensed.
  • Page 41 OPERATOR’S MANUAL 3. Adjustment of work table gib: Work table gib ( C ) is attached between saddle and work table dovetail. a. Loosen the setting lever ( A ). b. Clean the slideway and add the lubricant. c. Use a screwdriver to adjust the big bolts ( B ) on left and right sides of the saddle. d.
  • Page 42 OPERATOR’S MANUAL 4. Saddle gib is attached to the position between the right side of saddle and the bese dovetail. a. Loosen the saddle lock lever . b. Move the saddle to the front part of the knee. c. Take off the front and rear wiper holders ( F ) of saddles. d.
  • Page 43 OPERATOR’S MANUAL 5. Adjustment of knee gib on machine bady: Saddle gib is attached to the position between the side of saddle and the base slide way. a. Loosen the lock belt ( A ) by using hexagonal spanner. b. Take off the wiper holder ( B ). c.
  • Page 44 OPERATOR’S MANUAL 6. Adjustment of Ram Gib: Ram gib is attached to the position between the ram and the turret dovetail. Tightness of ram can be adjusted properly by gib bolts. a. Loosen the ram lock bolts ( A ). b.

  • Page 45: Transport, Unpacking And Floor Space P

    OPERATOR’S MANUAL 7. Transport, Unpacking and Floor Space A、 Methods of Transport: 1、 Methods of Transport: a. Prior of packed trnsport may be made by using forklift ( Figure 50 ) and a reinforced cable ( Figure 52 ). b. After unpacking, transport may be made by hoisting with a reinforced cable ( Figure 51 ) and the forklift eye bolt ( Figure 53 ).
  • Page 46 OPERATOR’S MANUAL P 43 / 57...

  • Page 47: B 、 Cautions For Unpacking P

    OPERATOR’S MANUAL B、 Cautions for Unpacking: 1、 To transport the machine, it is necessary to support the machine with the crated case or pallet to avoid the damages. In case of damages, please contact our agent or the transporter. 2、 After unpacking, check and see if all tools and accessories are intact without shortage, otherwise, please contact our agent.

  • Page 48: Precision Alignment P

    OPERATOR’S MANUAL Fig.55 8. Precision Alignment: Precision of a machine domicates the processing quality. To produce the quality workpiece, Precision of each and every components is a matter of vital importance. In order to maintain the primary machine precision following a long term operation, regular precision alignment is indispensable to the upgrading of work quality.
  • Page 49 OPERATOR’S MANUAL ACCURACY INSPECTION Utim:mm TOLERANCE Measured INSPECTION ITEMS ILLUSTRATUION PLANT OF SURFACE EVEN 0.06/m LEVEL LONGITUDINAL DIRECTION 0.06/m CROSS DIRECTION VERTICAL SPINDLE NOSE 0.01 RUN OUT VERTICAL SPINDLE FACE 0.015 TURE VERTICAL SPINDLE HOLE 0.01 RUN OUT AT FACE OF SPINDLE AT END OF 300mm TEST 0.02 PARALLELISM OF...
  • Page 50 OPERATOR’S MANUAL TOLERANCE Measured INSPECTION ITEMS ILLUSTRATUION SQUARENESS OF CROSS MOVE MENT OF TABLE 0.02/300 WITH MIDDLE T-SLOT SQUARENESS OF VERTICAL MOVEMENT OF 0.025/300 SPINDLE HEAD WITH TABLE SURFACE LONGITUDINAL DIRECTION CROSS DIRECTION 0.025/300 (HIGH AT FRONT OF TABLE) SQUARENESS OF TABLE 0.02/300 SURFACE WITH VERTICAL MOVEMENT OF KNEE...
  • Page 51 OPERATOR’S MANUAL TOLERANCE Measured INSPECTION ITEMS ILLUSTRATUION OVERARM SLIDE PARALLELISM OF CROSS 0.02 MOVEMENT WITH TABLE HORIZONTAL SPINDLE 0.01 FACE RUN OUT HORIZONTAL SPINDLE 0.015 FACE TRUE HORIZONTAL SPINDLE 0.01 HOLE RUN OUT AT FACE OF SPINDLE AT END OF 300mm TEST 0.02 0.01 PARALLELISM OF TABLE...
  • Page 52 ` O PERATOR’S MANUAL TOLERANCE Measured INSPECTION ITEMS ILLUSTRATUION SQUARENESS OF MIDDLE T-SLOT WITH HORIZONTAL 0.02/300 SPINDLE 0.02/300 TOLERANCE BETWEEN HORIZONTAL SPINDLE CENTER AND ARBOR SUPPORT 0.03/400 0.02/300 PARALLELISM OF SPINDLE CENTERLINE WITH OVERARM SLIDE MOVEMENT OR OVERARM SLIDE WITH SADDLE MOVEMENT IN VERTICAL IN HORIZONTAL...

  • Page 53: Maintenance P

    OPERATOR’S MANUAL 9. Maintenance “Maintenance is more important than repair; and repair is better than purchase”. Under long-term operations, if the machine has not been properly maintained and operated, its service lift shall be greatly reduced. The workpiece quality is therefore affected, and the efficiency, decreased. It is essential for an operator to know how to handle the machine and the concept of its maintenance and keep correctly.
  • Page 54 OPERATOR’S MANUAL TROUBLE CAUSE CORRECTION SPINDLE POWER FEED The two M4 set screw on Tighten set screws disengage lever loosed. DISENGAGEMENT NOT WORK WELL HAND MICRO-FEED NOT 1. Power feed rates selecting 1. Rotate this knob to one of the knob set on one of the three two “DUMMY”...
  • Page 55 OPERATOR’S MANUAL TROUBLE CAUSE CORRECTION VIBRATION 1. Insufficient clearance rubbing 1. Use recommended clearance angle 2. Machine at fault 2. Check machine, be sure arbor is at least 1/3 diameters of cutter CUTTER BURNS 1. Insufficient lubricant 1. Add sulfur base oil 2.

  • Page 56: Cutting Condition Chart P

    OPERATOR’S MANUAL Cutting Condition Chart P 53 / 57...
  • Page 57 OPERATOR’S MANUAL P 54 / 57...
  • Page 58 OPERATOR’S MANUAL SPEED DIAGRAM (Motor 50 Hz) P 55 / 57...

  • Page 59: Cautions P

    OPERATOR’S MANUAL Cautions A、 Machine Operations: 1、 Check and ensure if the machine bottom and ground base are properly contacted before the anchor bolts are locked up. 2、 The machine must be installed upon a solid base. 3、 Check and see if the motor voltage and power source voltage are conformed. 4、...

  • Page 60: Remarks P

    OPERATOR’S MANUAL Remarks 1、 All LONG CHANG products, from parts to finished machines, have gone through different flows of process under strict QC systems, with precision degrees in conformity with CNS (please vide charts of ex-factory inspection). TO ensure the preciseness, service life and safety operations, it is highly advisable for the users to study the full details in this manual.

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