2 - HANDLING, HOISTING START-UP...5

Transcription

1 Instructions for use I Contents Page 1 - GENERAL GENERAL SAFETY REGULATIONS STANDARD SAFETY DEVICES FIELD OF APPLICATION OVERALL DIMENSIONS SPECIFICATION HANDLING, HOISTING START-UP ANCHORING ELECTRICAL CONNECTION PNEUMATIC CONNECTION (Versions SE ) EXTRA SAFETY DEVICES (VERSION SE ) ADAPTER MOUNTING WHEEL GUARD ASSEMBLY AND ADJUSTMENT SPACER WD CONTROLS AND COMPONENTS BRAKE PEDAL PNEUMATIC LOCKING PEDAL (Version P) AUTOMATIC RIM DISTANCE AND DIAMETER GAUGE AUTOMATIC WIDTH GAUGE (OPTIONAL) AUTOMATIC WHEEL POSITIONING CONTROL PANEL AND DISPLAY CONTROL OF THE FUNCTIONS MENU INDICATIONS AND USE OF THE WHEEL BALANCER DOUBLE OPERATOR PROGRAM PRESETTING OF WHEEL DIMENSIONS AUTOMATIC PRESETTING AUTOMATIC WIDTH OPTION WHEEL ALU-S MANUAL PRESETTTING RECALCULATION OF THE UNBALANCE RESULT OF MEASUREMENT INDICATION OF EXACT CORRECTION POSITION IN ALU-S RESOLUTION OF THE UNBALANCE (SPLIT) UNBALANCE OPTIMIZATION ALU AND STATIC MODES AUTOMATIC MINIMIZATION OF STATIC UNBALANCE ECCENTRICTY MEASUREMENT (OPTION) SET UP SELF-DIAGNOSTICS SELF-CALIBRATION SCREEN SAVER TYPE OF DISPLAY OF UNBALANCE PHASE AUTOMATIC GAUGES RIM DISTANCE GAUGE DIAMETER GAUGE WIDTH GAUGE (OPTIONAL)) AMBIENT TEMPERATURE ERRORS INCONSISTENT UNBALANCE READINGS ROUTINE MAINTENANCE TO REPLACE THE FUSES RECOMMENDED SPARE PARTS LIST...28 I 0226 GB - 1

2 I 0226 GB - 2

3 1- GENERAL GENERAL SAFETY RECOMMENDATIONS - The balancing machine should only be used by duly authorized and trained personnel. - The balancing machine should not be used for purposes other than those described in the instruction manual. - Under no way should the balancing machine be modified except for those modifications made explicitly by the manufacturer. - Never remove the safety devices. Any work on the machine should only be carried out by duly authorized specialist personnel. - Do not use strong jets of compressed air for cleaning. - Use alcohol to clean plastic panels or shelves (AVOID LIQUIDS CONTAINING SOLVENTS). - Before starting the wheel balancing cycle, make sure that the wheel is securely locked on the adapter. - The machine operator should not wear clothes with flapping edges. Make sure that unauthorized personnel do not approach the balancing machine during the work cycle. - Avoid placing counterweights or other objects in the base which could impair the correct operation of the balancing machine STANDARD SAFETY DEVICES - STOP push button for stopping the wheel under emergency conditions. - The safety guard of high impact plastic is with shape and size designed to prevent risk of counterweights from flying out in any direction except towards the floor. - A microswitch prevents starting the machine if the guard is not lowered and stops the wheel whenever the guard is raised FIELD OF APPLICATION The machine is designed for balancing car or motorcycle wheels weighing less than 65 kg. It can be operated within a temperature range of 0 to + 45 C. It can measure the geometric radial run-out of the wheels (optional) OVERALL DIMENSIONS (42" Protection) Fig I 0226 GB - 3

4 1.4 - SPECIFICATION Single phase power supply V Hz Protection class... IP 54 Max. power consumption W Balancing speed approx min -1 Cycle time for average wheel (14 Kg)... (14 Kg) 6 seconds Balancing accuracy... 0,1 grammi Position resolution... ± 1.4 Average noise level... < 70 db(a) Distance rim - machine mm (400 mm can be preset) Larghezza cerchione impostabile or mm Diameter setting range or mm Total wheel diameter within guard (42 ) Total wheel width within guard (42 ) Max. wheel weight Kg. Min/max. compressed air pressure Kg/cm 2 approx. 0.7 to 1 Mpa; approx. 7 to 10 BAR;...approx. 100 to 145 PSI. 2 - HANDLING AND HOISTING Fig. 2 Fig. 2a NB: DO NOT HOIST THE MACHINE USING DIFFERENT GRIPS I 0226 GB - 4

5 3 - COMMISSIONING ANCHORING The machine can be operated on any fl at non-resilient fl oor. Make sure that the machine rests solely on the three support points provided (fi g. 2a). It is advisable to secure the system to the ground using the specific feet (see Figure 2a) in the event of continual use with wheels weighing over 35 Kg ELECTRICAL CONNECTION The machine is supplied with a single phase mains cable plus earth (ground). The supply voltage (and mains frequency) is given on the machine nameplate. It may NOT be changed. Connection to the mains should always be made by expert personnel. The machine should not be started up without proper earth (ground) connection. Connection to the mains should be through a slow acting safety switch rated at 4A (230V) or 10A (115V) PNEUMATIC CONNECTION (Versions SE) For operation of the spindle with pneumatic locking (costant thrust air spring) connect the balancing to the compressed air main. The connection fi tting is located at the back of the machine. At least 7 Kg/cm 2 (~ 0.7 MPa; ~ 7 BAR; ~ 100 PSI) pressure is needed for correct operation of the release device EXTRA SAFETY DEVICES (VERSION SE) - Wheel always locked even when there is pressure failure during the balancing cycle. - Always actuate the unlocking control pedal with the machine stationary in order to avoid stress and abnormal wear on the adapter ADAPTER MOUNTING The balancing machine is supplied complete with cone adapter for fastening wheels with central bore. Other optional fl anges can be mounted once the terminal part is removed (also see enclosed brochures) N.B. Carefully clean the coupling surfaces before performing any operation a) DISMOUNTING THREADED END PIECE Fig. 3 A B a) Back-off screw B and remove threaded end-piece A. b) Fit the new adapter I 0226 GB - 5

6 Mounting SE2 0 mm a b 1-2 mm c d e f g SE2_ 0140

7 SE2 Dismounting 360 a b c d Cone e - Quando possibile, centrare le ruote con cono dall'interno (vedi disegno). - Evitare di usare il manicotto RL con cerchi di ferro. - Whenever possible, centre the wheels with the cone from the inside (see the drawing). - Avoid using the RL sleeve with metal rims. - Lorsque c est possible, centrer les roues avec le cône de l intérieur (voir dessin). - Eviter d utiliser le manchon RL avec les jantes en fer. - Wenn möglich, die Räder mit Konus von Innen heraus zentrieren (siehe Zeichnung). - Bei Eisenfelgen die Verwendung der Muffe RL vermeiden. - Siempre que sea posible, centrar las ruedas con cono desde dentro (véase dibujo). - Evitar usar el manguito RL con llantas de hierro. - Quando possível, centre as rodas com cone pelo lado de dentro (ver fi gura). - Evite utilizar a luva RL com jantes de ferro. SE2_ 0140

8 3.6 - GUARD MOUNTING AND ADJUSTMENT a) Fasten the components to the base as illustrated in specifi c exploded view. b) The position of the wheel guard when closed can be adjusted with relative screw accessible at the back. Correct position is the one which keeps the tube exactly horizontal with wheel guard closed. c) Check that the microswitch is held down when the guard is closed. d) Adjust the angular position of microswitch control SPACER WD When balancing very wide wheels (9 ), there is not enough space to turn the distance gauge. To withdraw the wheel from the machine side, fi t spacer WD on the adapter body and secure it with the standard issue nuts. When centring the wheel with the cone on the inside, fi t the spacer DC to obtain spring thrust. Fig.4 DC WD Spring Cone BRAKE PEDAL Fig CONTROLS AND COMPONENTS This pedal allows the operator to hold the wheel when fi tting the counterweights. It must not be actuated during the measuring cycle PNEUMATIC LOCKING PEDAL (Version SE) Fig.6 This pedal allows releasing the device fastening the wheel on the adapter. Do not actuate this pedal during the machine cycle and/or when adapters other than the standard cone adapter are mounted. The pedal has two stable positions: top, wheel unclamped; bottom, wheel clamped I 0226 GB - 8

9 4.3 - AUTOMATIC DISTANCE AND DIAMETER GAUGE This gauge allows measurement of the distance of the wheel from the machine and the wheel diameter at the point of application of the counterweight. It also allows correct positioning of the counterweights on the inside by using the specifi c function which allows reading the position used for the measurement within the rim. The gauge can only be used with the counterweight pincers mounted AUTOMATIC WIDTH GAUGE (OPTIONAL) Width gauging is through a SONAR device which measures the distance of the wheel without mechanical contact, merely by closing the guard and each time a valid measurement has been made with gauge DISTANCE AND DIAMETER GAUGE AUTOMATIC WHEEL POSITIONING At the end of the spin, the wheel is positioned according to the unbalance on the outside or else according to the static unbalance (when selected). Precision is ± 20 for wheels up to 25 kg. in weight. Positioning is automatically disenabled for wheels of less than 13 in diameter. I 0226 GB - 9

10 CONTROL PANEL AND DISPLAY Fig Digital readouts, AMOUNT OF UNBALANCE, inside/outside 3-4 Digital readouts, POSITION OF UNBALANCE, inside/outside 5 Indicators, correction mode selected 6 User Indicators 7 Weight correction position indicators 8 Distance gauge position indicator 9 SPLIT ON indicator 10 OPT ON indicator 11 Measurements in mm indicator 12 ALUS ON indicator 13 Push button, operator selection 14 Push button, SPLIT (unbalance resolution) 15 Emergency push button 16 Push button, cycle start 17 OPT Pushbutton (unbalance optimisation) 18 HOME Pushbutton (terminate function) 19 Push button, FUNCTIONS MENU 20 Inch/mm dimensions selection pushbutton 21 Push button, eccentricity measurement selection (optional) 22 Push button, menu selection confi rmation 23 Push button, selection of mode of correction 24 Position repeater push button 25 Push button, unbalance reading < 5 g (25 oz) 26 Push buttons, manual DISTANCE/DIAMETER/WIDTH setting Note: - Only use the fi ngers to press the push buttons. Never use the counterweight pincers or other pointed objects. - In case of audible alarm connected (see par. OPERATION FUNCTIONS MENU), any push button operation sounds with a beep alarm. I 0226 GB - 10

11 OPERATION FUNCTIONS MENU Eccentricity measurement on/off (option) CONFIRM guard on/off CONFIRM on/off start from guard closing approximates 1-5g or oz on/off beep signal CONFIRM CONFIRM CONFIRM See SELF-DIAGNOSTICS chapter * * * * See SELF-CALIBRATION chapter g/oz unit of unbal. measurement Screen-saver duration (in minutes) Type of display of unbalance phase Calibration of automatic RIM DISTANCE gauge Calibration of automatic DIAMETER gauge Calibration of automatic WIDTH gauge (optional) RETURNS TO MEASUREMENT SCREEN Ambient temperature (in C) CONFIRM CONFIRM CONFIRM CONFIRM * N.B. If such indications fail to appear, contact Technical Service I 0226 GB - 11

12 5 - INDICATIONS AND USE OF THE WHEEL BALANCER DOUBLE OPERATOR PROGRAM This program allows memorizing the dimensions of two types of wheels. Thus two operators can work simultaneously on two different cars using the same balancing machine. The system memorizes two programs with various preset dimensions. 1 - Press to select operator (1 or 2). Selection is confi rmed by panel-mounted LED. 2 - Enter the dimensions (see PRESETTING OF WHEEL DIMENSIONS) 3 - carry out the balancing as usual With program 1 or 2 is called for subsequent balancing operations without having to newly enter the dimensions PRESETTING OF WHEEL DIMENSIONS AUTOMATIC PRESETTING - Standard wheels (calibration necessary also for modes ALU 1, 2, 3, 4 Static) Fig. 8 DISTANCE + DIAMETER Move the gauge tip into contact against the rim keeping it in position for at least 2 seconds. N.B. Measurement is the same in position A or B. Always use the round part of the contact tip. Pos. A Pos. B Indication of gauge in movement Indication of dimensions acquired. N.B.: When the beep signal is enabled (see section CONTROL OF THE FUNCTIONS MENU), reaching of the dimensions is accompanied by a beep Return the gauge to position 0. If automatic WIDTH readout is disenabled (see GAUGE ENABLE), the system automatically goes to the WIDTH position. The system automatically switches to WIDTH position - The nominal width is normally stamped on the rim; if not, proceed to measure dimension b with the calibre gauge (supplied as standard). I 0226 GB - 12

13 AUTOMATIC WIDTH OPTION If WIDTH measurement with sonar is enabled, the machine is set for the acquisition of this value: Fig. 9 The LT script on the LH matrix display indicates that LIGHT TRUCK wheel measurement is set (large dimension wheels such as off-road, trucks or wheels which protrude signifi cantly from the rim). This function can be enabled/disenabled by pressing push button prior to the measurement, which is then performed by closing the guard; once completely closed and if automatic START on guard closure is enabled, the launch will be made for unbalance measurement. If automatic START is disenabled, once the guard is closed the display will show the width value measured WHEEL ALU-S (correction from inside for two balancing planes with direct calibration): Fig. 10 After measurement for inside F1 as shown, again remove the gauge in order to memorize the data for the outside FE; keep the position for at least 2 seconds. The measurement can be made either in the position shown in Fig. 8/Pos.A or in Fig. 8/Pos.B. Manual presetting is possible by using the push buttons as for detailed hereunder. I 0226 GB - 13

14 MANUAL PRESETTING - Standard wheels Fig. 11 b a - Press to read -a- on the display - Preset distance a of the inside of the wheel from the machine (in mm). d - Press to select -d- - Preset the nominal diameter d indicated on the tyre. - Press to select -b- - Preset the nominal width which is normally stamped on the rim; if not, measure dimension b with the calibre gauge (supplied as standard). - Wheel ALU-S - Measure the dimensions as shown in the following diagram. Fig. 12 di de a ai ae PRESETTING: Press to select the measurement to set N.B.: If de is not preset, default value de = 0.8 dl During setting-up of values -b- -d- -di- -de- press button (on machine start-up, the dimensions are in INCHES). to switch measurement from inches to mm I 0226 GB - 14

15 5.3 - RECALCULATION OF THE UNBALANCE Press after new setting of the measurement RESULT OF MEASUREMENT Fig. 13 Inside correction Outside correction After performing a balancing spin, the amounts of unbalance are shown on the digital readouts. When the matrix display is ON, this indicates the correct angular wheel position for fi tting counterweights. (12 o clock position). When the beep signal is enabled (see section CONTROL OF THE FUNCTIONS MENU), this is activated when the wheel reaches the correction position. If the unbalance is less than the threshold selected, is displayed instead of the unbalance, with it is possible to read the values below the threshold chosen gram by gram. If the static unbalance is greater than 30 gr., the OPT Led fl ashes to suggest an unbalance optimisation operation. (see UNBALANCE OPTIMIZATION) INDICATION OF EXACT CORRECTION POSITION IN ALU-S In correction mode ALU-S it is possible to cancel approximations in the mounting of the counterweights by proceeding as follows: - press - Insert the correct weight on the relative seat on the weight holder pincers - Remove the gauge when the display shows: to indicate that the gauge should be pulled further out to indicate that the gauge should be returned to rest position The left display gives the indications for reaching the position regarding the inside, while the right display that of the outside The position of the gauge is also indicated by the position repeater Led (8). Position reached on the internal side Fig. 14 I 0226 GB - 15

16 Fig. 15 Position reached on the external side - Bring the wheel into correct angular position. - Move the gauge until the display corresponding to the selected correction plane shows the unbalance value again. - Rotate the rim until the correct weight lies against the rim. - The fact that the weight application position is no longer vertical (fi g. 16) is offset automatically. N.B. : It is not possible to put automatically the correction weight in the Fig.8/Pos.B position; always rotate the rim in Fig.5/Pos.A Fig RESOLUTION OF THE UNBALANCE (SPLIT) SPLIT only has meaning in the case of static unbalance or ALU-S on outside. It serves for hiding any stick-on unbalance correction weights behind the rim spokes. PRESETTING: Perform a balancing spin ( ) Fig Place any spoke in the 12 o clock position - set the number of spokes - / confi rm the settings enabling unbalance split I 0226 GB - 16

17 RESULTS UNBALANCE MEASUREMENT Fig Unbalance breakdown NOT in position Correction position Correction position 2 To return to normal unbalance display, perform a new spin by pressing or else push button. I 0226 GB - 17

18 UNBALANCE OPTIMIZATION - This function serves to reduce the amount of weight to be added in order to balance the wheel. - It is suitable for static unbalance exceeding 30 g. - It improves the residual eccentricity of the tyre. Unbalance already measured No previous unbalance measurement unbalance measurement - Mark with chalk a reference point on the adapter and rim. - With the aid of a tyre remover, turn the tyre on the rim by Refi t the wheel with the reference mark coinciding between rim and adapter. TYRE POSITION - RH display: percentage reduction - LH display: actual static unbalance which can be reduced by rotation. RIM POSITION - Mark the two positions of the rim and tyre, and turn the tyre on the rim until the positions correspond in order to obtain the optimization on the display. RETURN TO MEASUREMENT SCREEN I 0226 GB - 18

19 ALU AND STATIC MODES From the Measurement screen, press button to select the type required. The 5-LED displays show the position where to apply the weights. If a spin has already been performed, the processor automatically recalculates, for each change of mode, the amounts of unbalance according to the new calculation. Fig. 19 DYNAMIC Balancing steel or light alloy wheel rims by applying clamp weights on the edge of the wheel rim. STATICO ALU - S The static mode is necessary for motorcycle wheels or when it is not possible to place the counterweights on both sides of the rim. Balancing of light alloy rims with application of adhesive weights in positions inside the rim (user settable). ALU - 1 Balancing of light alloy rims with application of adhesive weights on the rim shoulders. 12/13 mm resting surface ALU - 2 Balancing of light alloy rims with hidden application of the outer adhesive weight. Outer weight position is fi xed. ALU - 3 Combined application: clip-on weight inside and hidden adhesive weight on outside (Mercedes). Outer weight position is the same as ALU-2. ALU - 4 Combined application: adhesive weight outside and clip-on weight inside AUTOMATIC MINIMIZATION OF STATIC UNBALANCE Initial unbalance sx dx g g phase shift 50 Possible approximations sx g dx g sx g dx g sx 4 g 3 g residual static1 g 6 g residual static residual static residual static With conventional wheel balancer This program is designed to improve the quality of balancing without any mental effort or loss of time by the operator. In fact by using the normal commercially available weights, with pitch of 5 in every 5 g, and by applying the two counterweights which a conventional wheel balancer rounds to the nearest value, there could be a residual static unbalance of up to 4 g. The damage of such approximation is emphasized by the fact that static unbalance is cause of most of disturbances on the vehicle. This new function, resident in the machine, automatically indicates the optimum entity of the weights to be applied by approximating them in an intelligent way according to their position in order to minimize residual static unbalance. g dx Choice with minimum static residual g sx g dx g I 0226 GB - 19

20 5.5 ECCENTRICTY MEASUREMENT (OPTION) The figures are significantly enlarged to highlight the external surface of the tyre and the wheel rotation axis. Fig. A highlights the total Peak-Peak eccentricity measurement, defi ned as the maximum radial offset of the surface of the tyre. Fig. A Fig. B Fig. B highlights the 1st harmonic eccentricity measurement, i.e. the eccentricity of the rim refl ecting the shape of the tyre, to calculate the averages values of local offset of the tyre from roundness. It is evident that the P-P measurement is normally higher than the 1st harmonic measurement. Tyre manufacturers usually provide two different tolerances for the two types of eccentricity. At the end of a balancing spin, eccentricity measurement of the tyre can be performed automatically using the SONAR sensor placed on the guard. To enable measurement at the end of every spin, see the section MENU FUNCTION CONTROL. Fig.20 EMS The value of the fi rst harmonic with the relative phase is displayed. EMS Hold down the value. button to display the Peak-Peak Release the button to return to the display of the fi rst harmonic value. BACK TO MEASUREMENT WINDOW N.B.: The eccentricity measurement is valid up to max. tyre Ø of 1000 mm. I 0226 GB - 20

21 6.1 - SELF-DIAGNOSTICS 6 - SET UP DISPLAY TEST All displays, readouts and LED s should light up 1 The RH display indicates the current position of the wheel, with numbers from 0 to 127 When the wheel is turned in the unbalance measurement rotation direction, the down arrows must appear. The central LED for the wheel (1) must come on ONLY ONCE per rotation at position 0. - Test parameter - Displays values of rim DISTANCE sensor - Displays values of DIAMETER sensor - Displys values of WIDTH sensor (optional) - Displays eccentricity measurement sensor values (RUN OUT - option) END OF SELF-DIAGNOSTICS CANCELS SELF-DIAGNOSTICS IN ANY PHASE I 0226 GB - 21

22 6.2 - SELF-CALIBRATION For machine self-calibration proceed as follows: - Fit a medium-sized metal wheel on the shaft. Example: 6 x 14 (± 1 ) - Preset the exact dimensions of the wheel mounted. CAUTION!! Presetting of incorrect dimensions would mean that the machine is not correctly calibrated, therefore all subsequent measurements will be incorrect until a new selfcalibration is performed with the correct dimensions! - Perform a spin under normal conditions. - Add 100 g (3.5 oz) on the outside in any angular position. - Shift the 100 g. weight from the outside to the inside keeping the same angular position. - Shift the 100 g. weight to the 12 o clock position. END OF SELF-CALIBRATION CANCELS SELF-CALIBRATION IN ANY PHASE I 0226 GB - 22

23 6.3 SCREEN SAVER It is possible to enable a screen saver function which temporarily replaces the data displayed with moving symbols. This function acts when the balancing system is not used for the time period defi ned in the relative set-up: Modify time expressed in minutes. CONFIRM If the value is set to 0, the screen saver is automatically disenabled. The screen saver is not active in the balancing machine set-up menu. To return to normal balancing machine function, simply press any button or move the wheel or the distance gauge. I 0226 GB - 23

24 6.4 - TYPE OF DISPLAY OF UNBALANCE PHASE The type of display of the unbalance phase can be selected, different from what is described in the manual to date. Changing the type of display of the unbalance phase. CONFIRMATION In this case the unbalance phase is indicated in the following way: MEASURING RESULT Inside correction Outside correction - MEASURING RESULT OF SPLIT UNBALANCE: Each weight to be applied has its own display (1 for the inside and 2 for the outside in ALU S) Unbalance inconsistent NOT in position Correction position Correction position 2 N.B. The standard type of display is type 1, i.e. that described throughout the manual. I 0226 GB - 24

25 6.5 - AUTOMATIC GAUGES RIM DISTANCE GAUGE - Shift the distance gauge to position, keeping it quite still, press - Move the gauge to position, press CORRECT CALIBRATION - Return the gauge to rest position - The wheel balancer is ready for operation N.B.: In the event of errors or faulty operation, the writing appears on the display : shift the gauge to position and repeat the calibration operation exactly as described above. If the error persists, contact the Technical Service Department. In the event of incorrect input in the rim distance gauge calibration function, press to cancel it DIAMETER GAUGE - Currently preset diameter. - Set the diameter with which to calibrate the machine (10 18 ) with - Press - Move the gauge tip into measuring position (Fig. 8/Pos.A) and keeping it still, press CORRECT CALIBRATION - Return the gauge to rest position - The wheel balancer is ready for operation In the event of incorrect input in the rim distance gauge calibration function, press to cancel it. I 0226 GB - 25

26 WIDTH GAUGE (OPTIONAL) Set with the distance in mm between the SONAR sensor and the distance gauge clamp in pos In the event of incorrect input in the width gauge calibration function, press. 6.6 AMBIENT TEMPERATURE When automatic width measurement or eccentricity measurement are enabled, the ambient temperature must be set to ensure correct calibration of the sonar sensors. Set the average ambient temperature for the location of the balancing machine. CONFIRM I 0226 GB - 26

27 7 - ERRORS During machine operation, various causes of faulty operation could occur. If detected by the microprocessor, they appear on the display as follows: ERROR MEANING 1 No rotation signal. Could be caused by faulty position transducer, or something preventing the wheel from turning. 2 During the measurement spins, wheel speed had dropped below 60 r.p.m. Check encoder functioning (see SELF-DIAGNOSTICS) and repeat the launch. 3 Unbalance too high. 4 Rotation in opposite direction. 5 Guard open before start of spin. 7 Fault in reading the machine calibration parameters. Repeat the self-calibration. 8 Fault in reading the machine calibration parameters. Repeat the self-calibration. 9 General fault in memory of the machine calibration parameters. Contact Technical Service Department. 10 Measured width too small. Repeat the automatic width measurement making sure that the preset distance value is correct. 11 Speed too high during unbalance measurement spins. 12/13/14 Diffi culty in reading the analog signal. Check encoder functioning (see SELF- DIAGNOSTICS). Contact Technical Service Department. 15/17 Inside/outside analog signal too high. Contact Technical Service. 16/18 Inside/outside analog signal too low. Contact Technical Service INCONSISTENT UNBALANCE READINGS Sometimes after balancing a wheel and removing it from the balancing machine, it is found that, upon mounting it on the machine again, the wheel is not balanced. This does not depend on incorrect indication of the machine, but only on faulty mounting of the wheel on the adapter; i.e. in the two mountings, the wheel has assumed a different position with respect to the balancing machine shaft centre line. If the wheel has been mounted on the adapter with screws, it could be possible that the screws have not been correctly tightened, i.e. crosswise one by one, or else (as often occurs) holes have been drilled on the wheel with too wide tolerances. Small errors, up to 10 grams (0.4 oz) are to be considered normal in wheels locked by a cone; the error is normally greater for wheels fastened with screws or studs. If, after balancing, the wheel is found to be still out-of-balance when refi tted on the vehicle, this could be due to the unbalance of the car brake drum or very often due to the holes for the screws on the rim and drum sometimes drilled with too wide tolerances. In such case a readjustment could be advisable using the balancing machine with the wheel mounted (For example, see our models L36, L38/2). 8 - ROUTINE MAINTENANCE Switch off the machine from the mains before carrying out any operation TO REPLACE THE FUSES The power supply board, accessible from the rear by removing the rear cover, is fi tted with safety fuses (see Exploded Drawings). If fuses require replacement, use ones of the same current rating. If the fault persists, contact the Technical Service Department. NONE OF THE OTHER MACHINE PARTS REQUIRE MAINTENANCE. I 0226 GB - 27

28 10 - RECOMMENDED SPARE PARTS LIST (For further details, see exploded drawings) CODE DESCRIPTION Bearing Z dia. 25/47/ Spring 19863P Rigid belt Poly V - TB Vee s 67M38954C Position pick-up board with cable Spring, brake lever 24587P 05PR50728 LEXAN panel Spring, rim distance gauge 67M48208A Power board with 2 relays/ 2 sonar Fuses DM 5x20-2A Oscillating switch 16A 86SC50842 Computer board 86SB38988 Cable, automatic rim distance gauge 86SB36493 Cable, automatic diameter gauge 86SB50843 Width sonar (optional) 86SB38585 Cable with microswitch for 42 protection SPECIAL PARTS FOR 230V MACHINES Single phase motor BIMA 230V/50-60 Hz -0.18Kw 63/B3-4p. 86SZ50844 Complete power board Braking transformer 30VA 230-0/ Capacitor 14MF 450 V FASTON screw M Power transformer 40VA SPECIAL PARTS FOR 115V MACHINES Single phase motor BIMA 115V/50-60Hz- 0.18Kw - 63/ B3-4p 86SZ50845 Complete power board Braking transformer 30VA 115-0/ Capacitor 25MF 450V FASTON screw M Power transformer 40VA SPECIAL PARTS FOR SPINDLE SE Bearing LLB/2AV1 dia. 35/62x14 Front Bearing Z dia. 35/62x14 Rear. 18FP29329 Air spring 115 kg. stroke 75 mm. 16FB42177 Coil valve 18FB42639 Spring, pneumatic pedal SPECIAL PARTS FOR EMS SONAR (OPTION) 86SB50847 Ems sonar I 0226 GB - 28