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Fona MyCrown Mill Service Manual

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Summary of Contents for Fona MyCrown Mill

  • Page 1 Service Manual jó`êçïå=jáää pÉêîáÅÉ=j~åì~ä båÖäáëÜ...

  • Page 2: Table Of Contents

    MyCrown Mill Contents General information....................General information..................Additional information..................Description of the service software ................General information..................Basic structure of test dialogs ............... Individual Test Points ..................2.3.1 Serial Communication ..............2.3.2 Media supply ..................2.3.2.1 Media supply ..............2.3.3...
  • Page 3 Service Manual 3.14 Milling unit not addressable................3.15 LAN communication problems ..............3.16 WLAN connection occasionally interrupted..........3.17 WLAN communication problems ..............Repair ........................Removing/attaching covers ................Replacing the (DC) spindle motors .............. 4.2.1 DC motor, single................4.2.1.1 Removal ................4.2.1.2 Installation ................
  • Page 4 MyCrown Mill 4.13 Replacing the water pump ................4.13.1 Removing the water pump ............... 4.13.2 Attaching the water pump ..............4.14 Replacing the display ..................4.15 Adjusting the plunger pin................4.15.1 G-axis and M-axis plunger pin ............4.16 Replacing the set screw ................

  • Page 5: General Information

    Service Manual General information C o n t e n t s General information..................Additional information...................

  • Page 6: General Information

    MyCrown Mill 1.1. General information Nominal line voltage ranges The MyCrown Mill milling unit operates in the following nominal line voltage ranges: ● 100V - 230VAC; 50 / 60 Hz Wireless phone interference with NOTICE medical electrical equipment To ensure safe operation of medical electrical equipment, the use of mobile wireless phones in practice or hospital environments is prohibited.

  • Page 7: Additional Information

    Check for zero potential. Switch the device off and disconnect the power plug before replacing parts. The item numbers for ordering spare parts are in FONA. Before replacing the boards, observe the ESD protective measures. Disposal Observe the information on disposal in the relevant operating instructions.
  • Page 8 MyCrown Mill Auxiliary tools & equipment ● Digital Multimeter, Accuracy Class 1 ● Soldering tool for repairing cables ● Side cutting pliers ● Cable ties ● Teflon tape ● Loctite 221 ● Calibration set (supplied with unit) ● Step Bur 12 SandCyl. Pointed Bur 12 S ●...

  • Page 9: Description Of The Service Software

    MyCrown Mill Description of the service software C o n t e n t s General information..................Basic structure of test dialogs ............... Individual Test Points ..................2.3.1 Serial Communication ..............2.3.2 Media supply ..................2.3.2.1 Media supply ..............2.3.3...

  • Page 10: General Information

    “Auto”. Service software log file The Service software generates a log file for all tests performed. This log file is located in the folder on delivery. C:\Program Files\FONA Dental\MyCrown Design 1.0.x\Bin\Service\Service\Protocols The protocol is called: Test file_XXXXXXXXXXXX_YYYYYYYY_ZZZZZZ.xml or Test file_XXXXXXXXXXXX_YYYYYYYY_ZZZZZZ.html...
  • Page 11 Service Manual NOTICE Assessment scores "Passed fully" Passed fully: If all test results are scored , flawless operation of the system is possible. "Passed" Passed: If the test results are scored , uncritical changes have occurred. "Not passed" Not passed: If the test results are scored , you must find and eliminate the cause.

  • Page 12: Basic Structure Of Test Dialogs

    NOTICE Do not share your password formula! The Service functions may be used only by authorized service engineers who have been trained by FONA Dental. Password The service software test dialogs are protected by a password to prevent manipulations by unauthorized users.
  • Page 13 Service Manual Opening the service software 1. Call the service menu as follows: Programs\FONA Dental\MyCrown Design x.x\Tools\Service Software  The Service Login dialog box then opens for entering the password: "Yes" 2. Enter the password and confirm with the button.
  • Page 14 MyCrown Mill Test selection dialog box "Test selection" In the dialog you can "Total test" ● select a test for the entire milling unit ( ) or ● select an individual test. "OK" Through confirmation with the button, the corresponding test dialog...
  • Page 15 Service Manual Example: Total test Total test...
  • Page 16 MyCrown Mill Number of test runs completed since the last time the Start button was actuated. Progress bar for test currently being run. Check boxes for selecting (activating/deactivating) the tests available in this test dialog. Check box for selecting the options possible in this test dialog.

  • Page 17: Individual Test Points

    Service Manual 2.3. Individual Test Points 2.3.1 Serial Communication The test is primarily used to measure the speed and quality of data transmission. This is especially important if the system is not operated via the network cable (LAN) but rather via other types of connections such as e.g.

  • Page 18: Media Supply

    MyCrown Mill 2.3.2 Media supply 2.3.2.1 Media supply Purpose of Test: To check the media supply (air, water, fan) for proper functioning and test the pressure switches and the function of the pump. Procedure The pumps and the fan are switched on by nominal select control depending on selection.

  • Page 19: Light Barriers, Door Switch, Temperature Sensor And Motor Stop

    Service Manual 2.3.3 Light Barriers, Door Switch, Temperature Sensor and Motor Stop Positions Purpose of Test: This test is used to evaluate the safe functioning of the light barriers and check the door switch, the temperature sensor and the motor stop positions.
  • Page 20 MyCrown Mill Switches - Control keys Display / Illumination The selected pattern is shown on the display as a display test. The "Illumination" button tests all colors of the milling chamber illumination: ● white (milling, default color) ● blue (not assigned to any function) ●...
  • Page 21 Service Manual Adjustment NOTICE Open block / Close block Place a block in the block axle to test the Open block / Close block function. The motors are moved to these positions to test the motor stop positions. Depending on which button is selected, the motors move to the corresponding position and stop there.

  • Page 22: Stepping Motor Test

    MyCrown Mill 2.3.4 Stepping motor test Purpose of Test: This test serves to evaluate the functioning of the stepper motors. The stepper motors are tested and evaluated for this purpose. In addition, this test can also be used to break in the milling machine.

  • Page 23: Stepping Motors - Single Step

    Service Manual 2.3.5 Stepping motors - Single step Warning on stepper motor test NOTICE Observe the warnings in the opened dialog. Purpose of Test: The test is used to control the motors individually in case of malfunction. "Technique " Procedure Using the buttons, you can move the individual motors in the longitudinal and rotary directions.

  • Page 24: Stepping Motor - Step Response

    MyCrown Mill 2.3.6 Stepping motor - Step response Purpose of Test: This test serves to detect the damping behavior of the stepping motors. Stepping motor - Step response Height of step (-7 to +7). Recommended setting: +7 Response time of damping behavior in [ms] Procedure A test cycle is run following each start.

  • Page 25: Dc Motors 'Load/Run-In

    Service Manual 2.3.7 DC motors 'Load/Run-in' Purpose of Test: This test serves to run in the DC motors and check them for proper functioning under continuous load. Procedure The DC motors are tested through operation at a constant current. The resulting speed provides an indication of the running resistance of the motor.

  • Page 26: Dc Motors 'Touch

    MyCrown Mill 2.3.8 DC motors 'Touch' Purpose of Test: This test is used to check the two DC motors for proper functioning in the Low-speed mode. Procedure The DC motors are tested by adjusting them to the touch speed (in the relevant directions of rotation).

  • Page 27: Dc Motors 'Speed

    Service Manual 2.3.9 DC motors 'Speed' Purpose of Test: This test is used to check the two DC motors for proper functioning in the High-speed mode. DC motors 'Speed' Measured speed Measured motor current Fluctuation of speed Fluctuation of motor current Procedure The DC motors are tested by accelerating them from a standing start to...

  • Page 28: Force Sensors / Stepping Motors: Rigidity

    MyCrown Mill 2.3.10 Force sensors / stepping motors: Rigidity Purpose of Test: The test is used to the check the static function of the force sensor and the axial rigidity of the L-stepping motors (L = linear). Procedure The motors can be selected either together or separately.

  • Page 29: Continuous Load

    Service Manual 2.3.11 Continuous load Purpose of Test: This test serves to simulate a maximum load for the power supply and intentionally heat up the entire system. All loads can be operated simultaneously. Continuous load...

  • Page 30: Milling Unit Info

    Milling Unit Info Value names Explanation of value SerialNumber Serial number of milling unit MachineType Machine type 83 = MyCrown Mill HW_configuration Hardware configuration Water Time Time since last water change M1_Time DC motor processing time based on instruments (right)
  • Page 31 Service Manual Value names Explanation of value M1_Counter Number of units based on miller or grinder used M2_Counter G1_Counter G2_Counter InlayCounter Number of inlays, crowns, veneers, copings, anatomic bridges, frameworks, CrownCounter abutments, test pieces and drilling VeneerCounter templates CopingCounter BridgeCounter FrameWorkCounter AbutmentCounter SampleCounter...

  • Page 32: Troubleshooting

    Service Manual Troubleshooting C o n t e n t s Force measurement errors................Stepping motor does not move ..............Spindle motor does not lock ................. Milling chamber door switch ................. Unit switches off ................... Edges break off, holes or wide stripes in restoration........Insufficient air pressure ................

  • Page 33: Force Measurement Errors

    Service Manual 3.1. Force measurement errors...

  • Page 34: Stepping Motor Does Not Move

    MyCrown Mill 3.2. Stepping motor does not move...

  • Page 35: Spindle Motor Does Not Lock

    Service Manual 3.3. Spindle motor does not lock...

  • Page 36: Milling Chamber Door Switch

    MyCrown Mill 3.4. Milling chamber door switch...

  • Page 37: Unit Switches Off

    Service Manual 3.5. Unit switches off Continued on next page...
  • Page 38 MyCrown Mill Continued from previous page...

  • Page 39: Edges Break Off, Holes Or Wide Stripes In Restoration

    Service Manual 3.6. Edges break off, holes or wide stripes in restoration Continued on next page...
  • Page 40 MyCrown Mill Continued from previous page...

  • Page 41: Insufficient Air Pressure

    Service Manual 3.7. Insufficient air pressure...

  • Page 42: Stepping Motor Cannot Be Controlled

    MyCrown Mill 3.8. Stepping motor cannot be controlled...

  • Page 43: Faulty Water Pressure

    Service Manual 3.9. Faulty water pressure...
  • Page 44 MyCrown Mill Continued from previous page...

  • Page 45: Unit Cannot Find Starting Position

    Service Manual 3.10. Unit cannot find starting position...

  • Page 46: Unit Cannot Be Turned On

    MyCrown Mill 3.11. Unit cannot be turned on...

  • Page 47: Touch Errors

    Service Manual 3.12. Touch errors...

  • Page 48: Service Life Of The Milling And Grinding Machine Is Too Short

    MyCrown Mill 3.13. Service life of the milling and grinding machine is too short...

  • Page 49: Milling Unit Not Addressable

    Service Manual 3.14. Milling unit not addressable...

  • Page 50: Lan Communication Problems

    MyCrown Mill 3.15. LAN communication problems Continued on next page...
  • Page 51 Service Manual Continued from previous page...

  • Page 52: Wlan Connection Occasionally Interrupted

    MyCrown Mill 3.16. WLAN connection occasionally interrupted...

  • Page 53: Wlan Communication Problems

    Service Manual 3.17. WLAN communication problems...

  • Page 54: Repair

    Service Manual Repair C o n t e n t s Removing/attaching covers ................Replacing the (DC) spindle motors .............. 4.2.1 DC motor, single................4.2.1.1 Removal ................4.2.1.2 Installation ................ 4.2.2 Testing and adjusting the spindle motor(s) ........Replacing the controller board / microcontroller module ......Replacing the milling chamber lighting............
  • Page 55 Service Manual 4.15 Adjusting the plunger pin................4.15.1 G-axis and M-axis plunger pin............4.16 Replacing the set screw ................4.17 Replace the distributor board for the milling motors........

  • Page 56: Removing/Attaching Covers

    MyCrown Mill 4.1. Removing/attaching covers NOTICE All of the device's covers must always be in place during processing. Cover, rear panel Cover, front Intermediate cover Cover, right drawer Cover, left Drawer insert, right Drawer insert, left Cover, right Cover, left drawer...
  • Page 57 Service Manual Removing the covers NOTICE Lead with connector X15 on cover, right When removing: Remove right cover (I) carefully and detach connector X15. 1. Remove the covers in the following order: A -> F -> G* -> I -> B -> E* -> C 2.

  • Page 58: Replacing The (Dc) Spindle Motors

    MyCrown Mill 4.2. Replacing the (DC) spindle motors 4.2.1 DC motor, single Mount cover Fastening screws, motor mount/mount cover Motor mount Fastening screws, shaft Fastening screws, motor 4.2.1.1 Removal Preparation 1. Switch the milling unit on.  The motors move into the home position.

  • Page 59: Installation

    Service Manual Removing the mount cover, replacing NOTICE the O-rings O-rings Use the O-rings supplied with the unit. 1. Pull the mount cover off of the shaft. NOTICE Do not damage the cables When removing the mount cover, be careful not to damage any electrical connecting cables.
  • Page 60 MyCrown Mill Attaching the motor to the motor mount O-ring in the motor mount Holes for air and water connections Power cable guide Mount cover gasket ✔ The first O-ring on the shaft and the O-rings of the air (light blue) and water (blue) connections have been replaced.
  • Page 61 Service Manual Motor O-ring Power supply cable Spindle motor Hole for air connection Bulge 4. Grease motor O-ring of the motor A and the bulge C sparingly. 5. Place the motor B in the motor mount. The hole for the air connection E must lie on the O-ring in the motor mount.

  • Page 62: Testing And Adjusting The Spindle Motor(S)

    MyCrown Mill Installing the motor unit 1. Push the motor mount onto the shaft until it locks in place. 2. Push the mount cover onto the motor mount as far as it will go.  A gap remains between the mount cover and the motor mount.

  • Page 63: Replacing The Controller Board / Microcontroller Module

    Service Manual Performing a milling test with Bur Set 1 ✔ "Step Bur 12 S" "Cyl. Pointed Bur 12 S" "Bur Set are inserted in 1" 1. Load a test block: Test, Patient -> Pyramide. 2. Insert a CEREC Block I10. 3.
  • Page 64 MyCrown Mill Removing the board 4. Loosen the knurled screw and remove the metal cover. 5. Fold the two black clips outwards and pull out the controller board. Replacing the controller board 1. Pull off the microcontroller module. 2. Plug the microcontroller module into the new controller board.
  • Page 65 Service Manual Installing the controller board 1. Insert the controller board in the rails and fold the two black clips inwards. 2. Screw the metal cover on tight with the knurled screw. 3. Insert guide pins Z in the cover and push the cover upward until it snaps into place.

  • Page 66: Replacing The Milling Chamber Lighting

    MyCrown Mill 4.4. Replacing the milling chamber lighting 1. Open the milling chamber door. 2. Pull out the tank. 3. Unscrew the front cover. 4. Unscrew the key mount (5 screws). 5. Use a small screwdriver to pry out the milling chamber lighting PC board on both sides.

  • Page 67: Replacing Stepping Motors

    Service Manual 4.5. Replacing stepping motors Overview of stepping motors...

  • Page 68: Br Stepping Motor

    MyCrown Mill 4.5.1 BR stepping motor Preparations 1. Remove all covers: 2. Unscrew the metal bracket (2 screws, TX 20 screwdriver). Removing the stepping motor NOTICE Be sure to mark the gear wheels! BEFORE unscrewing the stepping motor, clean the gear wheels and mark two aligned teeth of the clamping wheel and the gear wheel.

  • Page 69: Gr / Mr Stepping Motor

    Service Manual 4.5.2 GR / MR stepping motor Preparations 1. Remove all covers except for the left/right cover, depending on which stepping motor is defective. 2. Loosen the 2 screws of the metal cover and lift it out (TX 20 screwdriver).

  • Page 70: Linear Stepping Motor

    MyCrown Mill 4.5.3 Linear stepping motor 4.5.3.1 Removing the stepping motor Stepping motor, right Stepping motor, left Stepping motor, block 4.5.3.1.1 Preparing the right/left stepping motor Preparing the unit 1. Switch the milling unit on. 2. Remove the block and instruments.
  • Page 71 Service Manual "Steps" 5. For , select the 100value. "Technique " 6. Choose the button for until the affected motor is fully extended. 7. Switch off the milling unit at the main switch and remove the mains plug from the socket. Do not press the On/Off switch, since the unit would then move to the home position.
  • Page 72 MyCrown Mill 7. Switch off the milling unit at the main switch and remove the mains plug from the socket. Do not press the On/Off switch, since the unit would then move to the home position. NOTICE If the motor is defective If you cannot move the motor using the service software, you will have to manually push the gear wheel outwards.
  • Page 73 Service Manual 4.5.3.1.3 Removing the motor NOTICE Removing the motor for the block The block motor is removed in the same way as the right and left motors. ✔ The unit is disconnected from the mains. 1. Disconnect the "stepping motor linear" connection cable from the circuit board (A) as of (X3).

  • Page 74: Installing The Stepping Motor

    MyCrown Mill 4.5.3.2 Installing the stepping motor 4.5.3.2.1 Installing the stepping motor NOTICE Never completely unscrew the spindle. 1. Place the mounting fixture (F) on the spindle (with the thin pin facing the cast part). The opening must point towards the rotation motor; this enables you to remove the mounting fixture again following installation.
  • Page 75 Service Manual 7. Attach the supplied stop ring. Do not mix up the stop rings in the process. Shaft block Shaft, spindle motor 8. Push the motor flush against the cast part. 4.5.3.2.2 Checking the positioning Once you have installed the motor as described above, you now need to check the motor position.
  • Page 76 MyCrown Mill 4.5.3.2.4 Checking the installation of the stepping motor Checking the stepping motor adjustment "Start" ➢ In the service software, click on and run at least two test runs.  The motor is tested. Color Meaning No color No measurement available yet...

  • Page 77: Replacing The Milling Machine

    Service Manual 4.6. Replacing the milling machine 4.6.1 Removing the milling machine 1. Remove all covers: 2. Dismantle the DC motors (see chapter "Replacing the DC motors", Removal, Preparation and Removing the motor unit). Milling machine 3. Detach connectors GX1, BX1 and MX1 from the respective distribution board.
  • Page 78 MyCrown Mill Detaching the manifold 8. Remove the air and water manifolds from the cable holder. 9. Detach the nipple holder and pull out the offset (angled) nipple for each of the 2 manifolds. Then reattach the nipple holder to the manifold.

  • Page 79: Installing The Milling Machine

    Service Manual 4.6.2 Installing the milling machine NOTICE Parts protruding inside Be careful not to damage any parts that protrude inside. 1. Insert the milling machine carefully. 2. Bend the copper band on each foot over and screw the milling machine down tight using 4 screws and washers.
  • Page 80 MyCrown Mill Inserting the cable harness 5. Place the cable harness in the cable holder. 6. Plug connector X1 into the milling chamber lighting. 7. Connect reed contact connector X5. 8. Plug connectors GX1, BX1 and MX1 into the respective distribution board.

  • Page 81: Replacing The Tank Switch (If Present)

    Service Manual 4.7. Replacing the tank switch (if present) 4.7.1 Preparations 1. Pull the water tank out. 2. Unscrew the front cover. 4.7.2 Removing the chassis insert 1. Unscrew the 4 screws on the rear side of the cooling pack (TX 20 screwdriver).
  • Page 82 MyCrown Mill Taking out the chassis insert 4. Insert the hose toward the front and carefully pull the chassis insert forward until you can see the suction connection in space A. Rotating the suction connection...

  • Page 83: Installing The Chassis Insert

    Service Manual 5. Place the door switch solenoid cable to one side and rotate the suction connection clockwise until the hose with the suction connection can be pulled out underneath the metal bracket. 6. Unscrew the rear rubber-metal mountings (B) and slide the rails toward the rear (TX 10 screwdriver).

  • Page 84: Final Work

    MyCrown Mill 4.7.4 Final work 1. Screw on both drawers (4 screws each, using a TX 9 screwdriver). 2. Pull out the drawer on the left and on the right. 3. Reinsert the tank. 4. Reattach all covers. 4.8. Replacing the suction connection 4.8.1...

  • Page 85: Installing The Chassis Insert

    Service Manual 1. Unscrew the hose nipple with the hose (open-end wrench, 10 mm A/F). 2. Remove the shaft lock-down device and pull out the suction connection toward the front. 3. Insert the new suction connection and fasten it with the shaft lock- down device.

  • Page 86: Replacing The Air Pump

    MyCrown Mill 4.10. Replacing the air pump Preparations 1. Remove all covers except for the right cover. 2. Unscrew the fan unit and take it out. 3. Cut open the cable tie on the cable harness. NOTICE To obtain more space, you can pull off connector GX1.

  • Page 87: Replacing The Pressure Switch

    Service Manual Final work 1. If necessary, plug connector GX1 back in and refasten the cables with a cable tie. 2. Screw the fan unit back on again. 3. Reattach all covers. 4.11. Replacing the pressure switch 4.11.1 Water pressure switch 1.

  • Page 88: Air Pressure Switch

    MyCrown Mill 4.11.2 Air pressure switch 1. Remove all covers except for the right cover. 50hPa 50mbar Air pressure switch 2. Pull the connector off of the pressure switch. 3. Unscrew the pressure switch. 4. Seal the thread of the new pressure switch with teflon tape and screw it tight.

  • Page 89: Replacing The Fan Unit

    Service Manual 4.12. Replacing the fan unit 1. Remove all covers except for the right cover. Replacing the cooling unit 2. Unscrew the 4 screws on the rear side of the fan unit (TX 20 screwdriver). 3. Take out the fan unit and disconnect connector X8. 4.

  • Page 90: Replacing The Water Pump

    MyCrown Mill 4.13. Replacing the water pump 4.13.1 Removing the water pump 1. Remove the milling machine as described in the chapter "Removing the milling machine". 2. Disconnect power supply connector X10. 3. Unscrew the air pump mount (3 screws, TX20).

  • Page 91: Attaching The Water Pump

    Service Manual Water pump in opening 4.13.2 Attaching the water pump 1. Screw on the water pump with 4 screws. 2. Screw on the air pump mount with 3 screws. 3. Connect power supply connector X10. 4. Reinstall the milling machine as described in the chapter "Installing the milling machine".

  • Page 92: Replacing The Display

    MyCrown Mill 4.14. Replacing the display Replacing the display 1. Remove all covers except for the left cover. 2. Pull off connector X15. 3. Unscrew the defective display. NOTICE Display is deforming If you tighten the screws too tightly on one side, the display deforms.

  • Page 93: Adjusting The Plunger Pin

    Service Manual 4.15. Adjusting the plunger pin 4.15.1 G-axis and M-axis plunger pin 1. Switch the milling unit and the PC on. "Light barriers, door 2. Start the service software and start the test step switch, temperatur sensor, motor stop position" "Adjustment"...

  • Page 94: Replacing The Set Screw

    MyCrown Mill 4.16. Replacing the set screw NOTICE Not to be confused Do not confuse the set screw with the ball pressure screw! NOTICE Wear to the set screw Replace the set screw every 1000 clamping procedures or if the pin has broken off.

  • Page 95: Replace The Distributor Board For The Milling Motors

    Service Manual 4.17. Replace the distributor board for the milling motors Notes on replacing the distributor board Observe the following precautions before replacing the distributor board. ● When replacing an MC/MC X distributor board with the milling motors, use the revised "milling motor distributor board" (REF 63 35 850).

  • Page 96: Using The Cleaning Set

    MyCrown Mill Using the cleaning set C o n t e n t s Cleaning the manual block clamp ..............Milling instruments without chuck..............

  • Page 97: Cleaning The Manual Block Clamp

    Do not grease the thread when using milling instruments without chucks. NOTICE In the case of MyCrown Mill: Once a month Clean the clamping cones of the milling instruments. ✔ The motors are in the position for changing the milling instruments (burs).
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