Table of Contents
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Table of Contents
Related Manuals for Corghi EM8540
Summary of Contents for Corghi EM8540
- Page 1 EM8540 N.A. Cod. 4-104006 - 1.0 del 06/05 English Technical service manual...
- Page 2 diritti di traduzione, di memorizzazione elettronica, di riproduzione e di adattamento totale o parziale con qual- Italiano siasi mezzo (compresi microfilm e copie fotostatiche) sono riservati. Le informazioni contenute in questo manuale sono soggette a variazioni senza preavviso. ll rights reserved. No part of this publication may be translated, stored in an electronic retrieval system, repro- English duced, or partially or totally adapted by any means (including...
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Page 3: Table Of Contents
Sperimentale Equilibratrici May 2005 TECHNICAL SERVICE MANUAL EM 8540 Version with roller-driven wheel spin CONTENTS ELECTRICAL CONNECTION ........................... 2 SERVICE PROGRAMS ............................... 2 87 Working environments:............................2 88 Sensitivity calibration (2 spins): ..........................2 90 Automatic position search (RPA):........................... 3 91 Cancel/reset:................................ -
Page 4: Electrical Connection
ELECTRICAL CONNECTION All EM85XX balancing machines operate on single-phase power and are supplied preset for the specified power supply (115 V, 280V or 230 V AC). To modify this setting, the transformer primary must be adjusted to the available mains voltage. SERVICE PROGRAMS The purpose of these programs is to provide the information required for quickly and efficiently testing the various parts of the machine. -
Page 5: Automatic Position Search (Rpa)
at the end of the wheel spin, if the calibration has run successfully the message "END CAL" will be displayed; otherwise, the message "Er3 CAL" will appear for a short time; press F to exit the calibration function. NOTES On completion of the calibration procedure, remove the calibration weight and remove the automatic calibration disc from the balancing machine;... -
Page 6: Display Current Software Version
The program is used for: - maximum precision display of the unbalance values so as to be able to balance the wheel perfectly and run further checks on it; - maximum precision display (tenth of an inch) of the correspondence between the diameter and width values measured with the automatic sensors and the nominal wheel dimensions. -
Page 7: Display Search Circuit Board Operation (Encoder)
Notes • The values displayed are independent of the set dimensions. • With the wheel stationary, the measured data can be displayed alternately by pressing Enter. • It is possible to run additional spin cycles while still in the program. •... -
Page 8: Preset Speed Wheel Spin Setting
The program is used for: checking the operation of the sensors used for automatic data input. When the sensors are moved, the displayed values should vary continuously within the following ranges: diameter sensor from 0 to 1000 (+/-10) from standby to full stroke (see “replacing the diameter sensor”);... -
Page 9: Diagnostics Programs
We recommend using them exclusively for this purpose; the service programs described above are generally sufficient for service staff to identify malfunctions. In case of need, the documentation for the diagnostics programs can be requested from Corghi. REMOVING THE WEIGHT-HOLDER LID Remove in sequence: mini-anvil;... -
Page 10: Checking The Operation Of The Diameter Encoder [Di]
if this condition obtains, when the machine is switched on it displays "ERR10"; when the sensor arm is moved 2 mm away from the standby position, the microswitch is closed; at this point the "ERR10" message is cancelled. To adjust the position of the sensor, move it on its axis with the two nuts securing it to the mount. -
Page 11: Replacing The Distance Encoder
should return to its position in such a way as to recover the entire play in the gearwheel/sliding rod slot coupling. Check this throughout the range of possible diameter measurements. If the preload is insufficient, disengage one of the ends of the spring, rotate it 360° in the direction which increases the load, and refit it in the hole in the gearwheel or mount. -
Page 12: Sensor Errors
measured refer to external planes, so they will be lower than the nominal values because of the thickness of the rim. These differences are compensated by the sensor calibration procedure, so that the values measured are the same as the nominal values, a consolidated reference for the user. -
Page 13: Replacing The Brake Pedal Switch
If the values displayed after the spin cycle are not within the specified ranges, use the stud bolts to tighten down the pickups until the readings are correct. The correct values are usually obtained at a tightening torque of 2 Nm. Fully tighten down the locknuts and then release them slightly (about one sixth of a turn) to load the Belleville washers. -
Page 14: Spin Unit
• Extract the piston (C); • Replace the O-ring (A) with a new one; • Undo the nut securing the piston to the rod; • Replace the piston (C) with a new one; • If necessary, also replace the rod guide (D); •... -
Page 15: Replacing The Brake Shoe
Apply medium strength threadlocker (loctite243) to stud bolt B and screw it onto the pulley. Replacing the brake shoe Remove the weight-holder lid and the side casing; Select function 100 and press the down arrow key to move the electrical actuator so that the roller is touching the bell;... -
Page 16: Replacing The Motor
Replacing the motor Remove the weight-holder lid and the side casing; Remove the entire linear actuator assembly as described in the appropriate section of this manual; Undo the four M8 bolts securing the spin unit to the body beam and remove the unit from the balancing machine;... -
Page 17: Trouble Shooting
TROUBLE SHOOTING TROUBLE SHOOTING The EM 85XX balancing machine is equipped with self-test and self-diagnostics programs which cover the majority of faults and how to solve them (see the list of error messages and "troubleshooting" in the user manual). There are however some malfunctions which the machine is unable to identify; these are listed below. - Page 18 1) If the display is still showing the previously calculated unbalance values. The motherboard is not receiving or detecting the START signal from the keyboard or microswitch. Check: • the operation of the automatic start microswitch on the wheel guard (lowering the guard should close the switch's contact);...
- Page 19 tighten down the four circuit board mounting nuts located at the corners; finger tighten the two nuts located next to the keys; check that all keys work by pressing them one at a time; gradually tighten the two nuts so that the keys stay in contact with the polyester film without being overloaded.
- Page 20 that the brake shoe and spin unit drive roller are not touching the pulley during signal acquisition; that the cable connecting the search circuit board (encoder) to the motherboard is correctly fitted and wired; the operation of the search circuit board (encoder) by means of the values displayed in service (see "Service programs").
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Page 21: Error Messages
ERROR MESSAGES The machine is able to recognize a certain number of malfunctions and inform the user of their occurrence by displaying the respective messages on the screen. Err 1 Sensitivity calibration error Perform sensitivity calibration. The MBC161 board has been changed. Perform sensitivity calibration. Err 4 Outside sensor calibration error: perform outside sensor calibration. - Page 22 Check that the outside sensor is at 5 +/- 1 marks in the standby position. Check in service mode that when the outside sensor probe is touching the central unit flange, around 220 +/-30 marks are displayed. If the above conditions are not satisfied, register or replace the potentiometer. Err 23 Incomplete or invalid data entry in ALU P.
- Page 23 during the spin cycle. This message appears when the unbalance values are excessive, or when the balancing machine has been jolted during the reading stage.
- Page 24 EM8540 N.A. Cod. 4-104006 - 1.0 del 06/05 CORGHI S.p.A. - Strada Statale 468 n.9 42015 CORREGGIO - R.E. - ITALY Tel. ++39 0522 639.111 - Fax ++39 0522 639.150 www.corghi.com - info@corghi.com...
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Questions and answers
Reset encoder board
To reset the encoder board on a Corghi EM8540, follow these steps:
1. Remove the weight-holder lid.
2. Remove the search circuit board by undoing the two M8 screws.
3. Refit the search circuit board with the two M8 bolts, ensuring the encoder disk teeth run inside the fork without collisions.
4. Reconnect the pickup cable and the search circuit board.
5. Close the weight-holder lid.
6. Run a three spin cycle sensitivity calibration.
This answer is automatically generated
Hello, my machine is showing 0.00 balance all the time when trying to balance any tire. any ideas?
The Corghi EM8540 machine could display a 0.00 balance when attempting to balance a tire due to the following reasons:
1. Spin Stopped Prematurely (ERR STP) – If the spin stops before completing the acquisition cycle, it could result in incorrect or incomplete readings.
2. Unsecured Ring Nut – If the ring nut is not fully tightened, the wheel may not be properly secured, leading to incorrect balance readings.
3. No Wheel Mounted – Running a spin cycle without a wheel could cause the machine to display a 0.00 balance.
4. Obstructions During Spin – If the drive roller, brake shoe, or weight-holder lid touches the unit during the spin, it may interfere with the balancing process and result in an incorrect reading.
5. Excessive Unbalance or Machine Jolt (CCC Error) – If the machine experiences excessive unbalance or is jolted during the reading stage, it could affect the accuracy of the balance measurement.
Checking these factors and ensuring proper operation should help resolve the issue.
This answer is automatically generated
Hola, en la pantalla de la máquina corhhi aparece un código ALU 5, por favor me podrían ayudar a solucionarlo?