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Hofmann Megaplan M420 Use And Maintenance Manual

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Use and maintenance manual
M420
Hofmann Megaplan GmbH
A 5302 HENNDORF - AUSTRIA
Hauptstraße, 67 - Tel. (+43) 6214 646612
Fax (+43) 6214 646622 EMail: HM-mail@hofmann-megaplan.com
The Manufacturer declines all liability for any damage to people or property caused by incorrect use of this product.
Subject to change without prior notice.

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  • Page 1 Use and maintenance manual M420 Hofmann Megaplan GmbH A 5302 HENNDORF - AUSTRIA Hauptstraße, 67 - Tel. (+43) 6214 646612 Fax (+43) 6214 646622 EMail: HM-mail@hofmann-megaplan.com The Manufacturer declines all liability for any damage to people or property caused by incorrect use of this product.
  • Page 2 Istruzioni originali Translation of the original instructions Traduction de la notice originale Übersetzung der Originalanweisungen Traducción de las instrucciones originales Tradução das instruções originais...
  • Page 3 Use and maintenance manual General Index FOREWORD GENERAL PURPOSE OF THE MANUAL WHERE AND HOW TO KEEP THE MANUAL MANUAL UPGRADES COLLABORATION WITH USERS MANUFACTURER MANUFACTURER’S RESPONSIBILITY AND WARRANTY 1.7.1 Terms of warranty TECHNICAL ASSISTANCE SERVICE COPYRIGHT MACHINE DESCRIPTION TECHNICAL SPECIFICATIONS DIMENSIONS COMPONENTS STARTING...

  • Page 4: Table Of Contents

    AUTOMATIC GAUGES CALIBRATION 7.4.1 Distance gauge calibration 7.4.2 Diameter gauge calibration 7.4.3 Width sonar calibration (option) ADHESIVE WEIGHT WIDTH SPOTTER DEVICE CALIBRATION 7.6.1 Laser spotter brightness DIAGNOSTICS INCONSISTENT UNBALANCE READINGS MAINTENANCE GENERAL 9.1.1 Introductory notes 9.1.2 Safety rules 9.1.3 Replacing fuses 9.1.4 Cleaning the screen 10.
  • Page 5 Use and maintenance manual 1. Foreword This manual is an integral part of the INSTALLATION manual which should be consulted concerning starting and using the machine safely. Read carefully before continuing. GENERAL The machine has been constructed in conformity with the current EC Directives and the technical standards im- plementing the requirements, as stated in the declaration of conformity issued by the manufacturer and attached to the manual.
  • Page 6 Use and maintenance manual WHERE AND HOW TO KEEP THE MANUAL This manual (and relative attachments) must be kept in a safe and dry place and must always be available for consultation. Make a copy and keep it in the archive. When exchanging information with the manufacturer or the technical assistance staff authorised by the former, quote the rating plate information and the serial number of the machine.
  • Page 7 Use and maintenance manual The manufacturer declines all direct and indirect liability caused by: ▪ use of the machine in a different way from that indicated in this manual ▪ use of the machine by people who have not read and fully understood the contents of this manual ▪...
  • Page 8 7 ÷ 10 kg/cm 1210 approx. 0.7 to 1 MPa approx. 7 to 10 bar approx. 105 to 145 psi Maximum wheel weight < 75 kg Machine weight 120 kg COMPONENTS M420 M420P TOUCH CONTROL PANEL WEIGHT-TOOL HOLDER AUTOMATIC GAUGE Machine description...
  • Page 9 Use and maintenance manual COLLAR SE LOCK NUT BP PEDAL SPOTTER LASER + RIM INTERIOR LIGHT LA SONAR (option) (option) Machine description...
  • Page 10 Use and maintenance manual 3. Starting Before switching on the machine, make sure that all the connections described in the INSTALLATION chapter have been made correctly. The following operations involve a potential risk for the operator, given the presence of voltage on the equipment. The Personal Protective Equipment described in the INSTALLATION manual must be worn and work must be done with due care and attention.
  • Page 11 Use and maintenance manual 7. Position the wheel on the terminal with the inner part facing the balancer. 8. Firmly attach the wheel to the balancer shaft using the lock nut. In the pneumatic version, use the specific collar provided. For operation of the spindle with pneumatic locking (constant thrust air spring) connect the wheel balancer to the compressed air mains.
  • Page 12 Use and maintenance manual 4. Correction plane identification ▪ Standard dynamic balancing using only clip-on weights: inside plane distance diameter width ▪ Standard dynamic balancing using adhesive weights or a mix of adhesive and clip-on weights: inside plane distance inside plane distance outside inside inside...
  • Page 13 Use and maintenance manual Control panel START STOP Digital readouts, AMOUNT OF UNBALANCE, inside/outside Digital readouts, POSITION OF UNBALANCE, inside/outside Push button, selection of mode of correction Push button, unbalance reading below the threshold Push button, FUNCTIONS MENU Push button, menu selection confirmation Push button, cycle start Push button, emergency/home Manual dimension setting buttons...
  • Page 14 Use and maintenance manual 6. Use of the wheel balancer STANDARD BALANCING (clip-on counterweights) 6.1.1 Wheel dimensions setting Using the special grip, move the end of gauge against the rim as shown in the figure: While the gauge is moving the following appears: Hold the gauge in position for at least 2 seconds.
  • Page 15 Use and maintenance manual At the end of the automatic measurement of the distance and diameter the following appears: Slowly lower the guard to automatically measure the wheel width with LA sonar and perform a measurement spin. FINE For large wheels (e.g. off-road vehicles, light trucks or wheels protruding far out from the rim) press the button to switch from: N.T.
  • Page 16 Use and maintenance manual 6.1.2 Result of the measurement and weight application If the unbalance is out of tolerance: 1. When the spin is complete, bring the unbalance into correction position by turning the wheel by hand. The spindle is automatically locked in correction position (if not disabled the spindle lock). If the acoustic signal is enabled ( ), a beep will sound when the correction MENU - ACOUSTIC SIGNAL...
  • Page 17 Use and maintenance manual BALANCING WITH ADHESIVE WEIGHTS (ALU) 6.2.1 Wheel dimensions setting Using the dedicated grip, move the gauge tip up against the inside of the rim and make two consecutive measure- ments starting from the inside (FI) as shown in the figure. The two preselected positions coincide with the point where the counterweight is to be applied.
  • Page 18 Use and maintenance manual 6.2.2 Result of the measurement and weight application If the unbalance is out of tolerance: 1. When the spin is complete, bring the unbalance into correction position by turning the wheel by hand. The spindle is automatically locked in correction position (if not disabled the spindle lock). If the acoustic signal is enabled ( ), a beep will sound when the correction MENU - ACOUSTIC SIGNAL...
  • Page 19 Use and maintenance manual BALANCING WITH A MIX OF ADHESIVE AND CLIP-ON WEIGHTS (STATIC BALANCING) After dimension acquisition in standard balancing mode, pressing the buttons , you can select one of the following correction modes. WEIGHT APPLICATION POSITION Correction type Inside Outside Clip-on weight at 12 o’clock...
  • Page 20 Use and maintenance manual STATIC UNBALANCE The static unbalance is shown on display 1 and the relative correction position on the LED display 3 The correction weight application diameter cannot be set, but is deduced from the dimensions acquired in standard or ALU mode through interpolation algorithms and the use of fixed parameters.
  • Page 21 Use and maintenance manual SPOTTER The spotter device emits a laser reference to help you select the correction planes and indicates the correct po- sition during correction. ▪ Inside plane measurement, configuration on-1/on-2 > ON-1: the spotter emits a laser reference point only after having acquired the dimensions relating to the weight to be applied on the inside of the wheel.
  • Page 22 Use and maintenance manual EP – EXTERNAL PLANES Enabling EP in the case of correction with adhesive weights, the unbalance is considered within tolerance when the weight recalculated on the external planes is less than the tolerance set (regardless of the residual unbalance on the selected correction planes).
  • Page 23 Use and maintenance manual 6.10 UNBALANCE OPTIMIZATION The program allows total wheel out-of-balance to be reduced by compensating, when possible, tyre and rim out- of-balance values. It is suitable for static unbalance values in excess of 30 grams. It requires two runs, rotating the tyre on the rim on the second run.
  • Page 24 Use and maintenance manual 7. Setup MENU ACCESS DIAGRAM This is used to personalise some balancer functions and to perform calibrations. MENU To access this section, press the button. MENU UNBALANCE OPTIMISATION ENTER diameter mm/inch ENTER ENTER width mm/inch ENTER ENTER start from guard closing ON/OFF...
  • Page 25 Use and maintenance manual SELF-DIAGNOSTICS The machine can perform self-diagnostics to check the LED’s on the control panel and make sure the encoder reads correctly. To perform this operation, view the SETUP menu. MENU ENTER ENTER In the self-diagnostics sequence, all the LED’s on the panel light up for a few seconds in order to check operation. When the LED’s go out, the machine automatically moves on to the encoder reading phase.

  • Page 26: Automatic Gauges Calibration

    Use and maintenance manual 4. Turn the wheel until the standard weight is at the top (12 o’clock) and press ENTER CALIBRATION COMPLETE STOP To cancel calibration at any time, press AUTOMATIC GAUGES CALIBRATION 7.4.1 Distance gauge calibration 1. Display the distance gauge CALIBRATION function from the SETUP menu MENU ENTER ENTER...

  • Page 27: Diameter Gauge Calibration

    Use and maintenance manual 7.4.2 Diameter gauge calibration 1. Display the diameter gauge CALIBRATION function from the SETUP menu MENU ENTER ENTER 2. Place the gauge rod on the spindle shell as shown in the figure and press ENTER 3. Turn the gauge downward positioning the gauge rod in contact with the spindle sleeve as shown in the figure and press ENTER CALIBRATION COMPLETE...

  • Page 28: Width Sonar Calibration (Option)

    Use and maintenance manual 7.4.3 Width sonar calibration (option) 1. Display the width sonar CALIBRATION function from the SETUP menu MENU ENTER ENTER 2. Set with the distance in mm between the Sonar sensor (0 sonar) and the distance gauge feeler pin (at rest) dIS.
  • Page 29 Use and maintenance manual The two adhesive weights must be securely applied in order to execute two measurements using the automatic distance and diameter gauge and two spotter device positions using the on-display buttons. If you accidentally lose a weight during calibration, the procedure needs to be repeated from scratch. During calibration, use the automatic distance and diameter gauge with the necessary accuracy.

  • Page 30: Laser Spotter Brightness

    Use and maintenance manual ENTER 4. Press to move the spotter device laser near the first adhesive weight and press ENTER 5. Press to move the spotter device laser near the innermost adhesive weight and press CALIBRATION COMPLETE. STOP In the event of incorrect input in the width gauge calibration function, press to cancel it.

  • Page 31: Diagnostics

    Use and maintenance manual 8. Diagnostics INCONSISTENT UNBALANCE READINGS In some cases, when a wheel that has just been balanced is repositioned on the balancer, the machine can detect an unbalance. This is not a machine problem but is due to faulty mounting of the wheel on the flange. In other words, when mounting the wheel after initial balancing, it has taken another position with respect to the balancer shaft axis.
  • Page 32 Use and maintenance manual ▪ Err. 11 Speed too high error Check in self-diagnostics that the encoder functions properly During unbalance measurement rotation, ▪ Replace the computer board wheel speed is more than 270 rpm ▪ Err.14 / Unbalance measurement error Check in self-diagnostics that the encoder functions properly Err.15 / ▪...

  • Page 33: Maintenance

    Use and maintenance manual 9. Maintenance GENERAL Before performing any maintenance operations, make sure the machine has been disconnected from the mains power supply. Always use the Personal Protective Equipment indicated in the Installation Manual. 9.1.1 Introductory notes This machine has been designed so as not to require routine maintenance, apart from accurate periodic cleaning. It is important to keep the machine perfectly clean in order to prevent dust or impurities from compromising the operation of the balancer.

  • Page 34: Replacing Fuses

    Use and maintenance manual 9.1.3 Replacing fuses Some protection fuses are located on the power board (see wiring diagrams) accessible by dismantling the weight shelf). If fuses require replacement, use ones with an identical current intensity. 9.1.4 Cleaning the screen Use a soft cloth and NON-ABRASIVE commercial glass/plastic cleaning spray or ethanol or natural detergents.

  • Page 35: Spare Parts

    Use and maintenance manual 11. Spare parts 11.1 IDENTIFICATION AND ORDERING METHOD The various parts can be identified using the exploded drawings, the electrical drawings and diagrams in the ma- chine technical file which is archived by the Manufacturer to which a request can be made. For off-the-shelf parts, the technical manuals or the supplier’s original documents can be provided if the Manu- facturer deems this to be useful.

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