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Service Manual

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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. Remove all covers except for the right cover.

Water 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.

5. Plug the connectors into the new pressure switch.
6. Reattach all covers.

Содержание MyCrown Mill

Страница 1: ...j j p j b Service Manual...

Страница 2: ...2 3 7 DC motors Load Run in 25 2 3 8 DC motors Touch 26 2 3 9 DC motors Speed 27 2 3 10 Force sensors stepping motors Rigidity 28 2 3 11 Continuous load 29 2 3 12 Milling Unit Info 30 3 Troubleshootin...

Страница 3: ...3 Linear stepping motor 70 4 5 3 1 Removing the stepping motor 70 4 5 3 2 Installing the stepping motor 74 4 6 Replacing the milling machine 77 4 6 1 Removing the milling machine 77 4 6 2 Installing t...

Страница 4: ...mp 91 4 14 Replacing the display 92 4 15 Adjusting the plunger pin 93 4 15 1 G axis and M axis plunger pin 93 4 16 Replacing the set screw 94 4 17 Replace the distributor board for the milling motors...

Страница 5: ...5 Service Manual b 1 General information C o n t e n t s 1 1 General information 6 1 2 Additional information 7...

Страница 6: ...using a wrist band Measurements Always switch off the device before connecting the measuring instrument Select the correct current voltage type and adjust the measuring range to match the expected re...

Страница 7: ...nt operating instructions 1 2 Additional information In addition you also require Wiring diagrams MyCrown Mill Order No 66 18 974 Operating Instructions MyCrown Mill Order No 66 11 748 Tools Allen key...

Страница 8: ...ring 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 Torque wrench for changing the milling ins...

Страница 9: ...ia supply 18 2 3 2 1 Media supply 18 2 3 3 Light Barriers Door Switch Temperature Sensor and Motor Stop Positions 19 2 3 4 Stepping motor test 22 2 3 5 Stepping motors Single step 23 2 3 6 Stepping mo...

Страница 10: ...oftware 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 c...

Страница 11: ...ed Passed uncritical changes have occurred Not passed If the test results are scored Not passed you must find and eliminate the cause NOTICE Keep the cover closed If the milling unit housing is left o...

Страница 12: ...used only by authorized service engineers who have been trained by FONA Dental Password number Generated from 1 2 number of the current month 2 1 number of the current month 3 2 number of the current...

Страница 13: ...you want to delete this file If you click on the Yes button The old file is deleted and a new log file is created If you click on the No button The old file is not deleted and the details of the new...

Страница 14: ...st selection dialog box In the Test selection dialog you can select a test for the entire milling unit Total test or select an individual test Through confirmation with the OK button the corresponding...

Страница 15: ...15 Service Manual b Example Total test Total test...

Страница 16: ...ble during the test run G With the Stop button the test is broken off as quickly as possible The test in progress at the time of cancellation is not counted All inputs are now possible again H Store t...

Страница 17: ...c Infrastructure The transmission time between the beginning of transmission and the end of reception is calculated for a specific record on the PC A test run comprises one complete transmission in bo...

Страница 18: ...pressure switches are registered The points of time when the pressure detectors respond are measured After approx 5 seconds the pumps are switched off and the time required until the pressure switch...

Страница 19: ...he slot of the gear is measured via the width and height at which the stepping motor positions are registered with the flanks The light barriers to be tested can be selected in all variations If no li...

Страница 20: ...attern 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 green operat...

Страница 21: ...ition and stop there The motors can be reset to their home positions by pressing the Home button Switches Adjustment NOTICE Open block Close block Place a block in the block axle to test the Open bloc...

Страница 22: ...stepping motors are run at various speed settings and evaluated via an acceleration table Display of test results In order to satisfy different requirements for adjustment and testing purposes this te...

Страница 23: ...he individual motors in the longitudinal and rotary directions Under the option Longitudinal axis tolerance control the Grind Block and Mill axles can be extended by a permanently set value This speci...

Страница 24: ...amping behavior of the stepping motors Stepping motor Step response Procedure A test cycle is run following each start If no motor is selected the START button is not active Step response BR motor can...

Страница 25: ...tors Load Run in The two motors left motor right motor can be selected together or separately The speed range of the DC motor can be tested selectively via the adjustable motor current If no motor is...

Страница 26: ...If no motor is selected the Start button is not active Default Both motors selected 1 Measure of speed fluctuation 2 Pulse width modulation NOTICE Different bearing friction If the red fields in the s...

Страница 27: ...roper functioning in the High speed mode DC motors Speed Procedure The DC motors are tested by accelerating them from a standing start to operating speed and then measuring the relevant data e g speed...

Страница 28: ...together or separately The calibration phantom is now clamped The calibration pins are now ready for use The Automatic option button is selected Start the test If no motor is selected the START button...

Страница 29: ...anual b 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 Con...

Страница 30: ...nd grinder Milling Unit Info Value names Explanation of value SerialNumber Serial number of milling unit MachineType Machine type 83 MyCrown Mill HW_configuration Hardware configuration 40 Water Time...

Страница 31: ...s anatomic bridges frameworks abutments test pieces and drilling templates CrownCounter VeneerCounter CopingCounter BridgeCounter FrameWorkCounter AbutmentCounter SampleCounter Drilling templates Unit...

Страница 32: ...ripes in restoration 39 3 7 Insufficient air pressure 41 3 8 Stepping motor cannot be controlled 42 3 9 Faulty water pressure 43 3 10 Unit cannot find starting position 45 3 11 Unit cannot be turned o...

Страница 33: ...33 Service Manual b 3 1 Force measurement errors...

Страница 34: ...34 MyCrown Mill 3 2 Stepping motor does not move...

Страница 35: ...35 Service Manual b 3 3 Spindle motor does not lock...

Страница 36: ...36 MyCrown Mill 3 4 Milling chamber door switch...

Страница 37: ...37 Service Manual b 3 5 Unit switches off Continued on next page...

Страница 38: ...38 MyCrown Mill Continued from previous page...

Страница 39: ...39 Service Manual b 3 6 Edges break off holes or wide stripes in restoration Continued on next page...

Страница 40: ...40 MyCrown Mill Continued from previous page...

Страница 41: ...41 Service Manual b 3 7 Insufficient air pressure...

Страница 42: ...42 MyCrown Mill 3 8 Stepping motor cannot be controlled...

Страница 43: ...43 Service Manual b 3 9 Faulty water pressure...

Страница 44: ...44 MyCrown Mill Continued from previous page...

Страница 45: ...45 Service Manual b 3 10 Unit cannot find starting position...

Страница 46: ...46 MyCrown Mill 3 11 Unit cannot be turned on...

Страница 47: ...47 Service Manual b 3 12 Touch errors...

Страница 48: ...48 MyCrown Mill 3 13 Service life of the milling and grinding machine is too short...

Страница 49: ...49 Service Manual b 3 14 Milling unit not addressable...

Страница 50: ...50 MyCrown Mill 3 15 LAN communication problems Continued on next page...

Страница 51: ...51 Service Manual b Continued from previous page...

Страница 52: ...52 MyCrown Mill 3 16 WLAN connection occasionally interrupted...

Страница 53: ...53 Service Manual b 3 17 WLAN communication problems...

Страница 54: ...ne 77 4 6 1 Removing the milling machine 77 4 6 2 Installing the milling machine 79 4 7 Replacing the tank switch if present 81 4 7 1 Preparations 81 4 7 2 Removing the chassis insert 81 4 7 3 Install...

Страница 55: ...55 Service Manual b 4 15 Adjusting the plunger pin 93 4 15 1 G axis and M axis plunger pin 93 4 16 Replacing the set screw 94 4 17 Replace the distributor board for the milling motors 95...

Страница 56: ...rs NOTICE All of the device s covers must always be in place during processing A Cover rear panel F Cover front B Intermediate cover G Cover right drawer C Cover left H Drawer insert right D Drawer in...

Страница 57: ...push the cover upward until it snaps into place NOTICE Lead with connector X15 on cover right When removing Remove right cover I carefully and detach connector X15 Y Y NOTICE Lead with connector X15...

Страница 58: ...Remove the fastening screws of the shaft 3 Pull the motor mount together with the motor off of the shaft and the mount cover At the same time unplug the power supply connectors Removing the motor 1 Re...

Страница 59: ...and the water connector blue and replace them with new ones 4 2 1 2 Installation NOTICE O rings Use the O rings supplied with the unit NOTICE Do not damage the cables When removing the mount cover be...

Страница 60: ...ere a new gasket to the mount cover 2 Replace the O ring in the motor mount A Apply a small amount of lubricant to the O ring prior to installation and make sure that it does not slip 3 Fold the cable...

Страница 61: ...t cover onto the shaft as far as it will go 2 Push the motor along with the motor mount onto the shaft 3 Connect the power supply connectors A Motor O ring D Power supply cable B Spindle motor E Hole...

Страница 62: ...ustments have to be performed Testing spindle motor s with service software 1 Perform the Media supply test Air noticeably escapes from each spindle motor 2 Perform the DC motors Load inlet test The m...

Страница 63: ...and measure it The length of the edge must be between 4 90 mm and 5 03 mm The difference between the edge lengths must be less than 0 05 mm the height of the pyramid must be between 5 20 and 5 35 mm...

Страница 64: ...board Replacing the microcontroller module 1 Pull off the defective microcontroller module 2 Plug the new microcontroller module into the controller board 3 After installing the controller board perf...

Страница 65: ...picture of the desired device 5 Note the device name and IP address of the milling unit where you replaced the microcontroller module 6 Click on the Delete Device button 7 Switch the milling unit on 8...

Страница 66: ...Use a small screwdriver to pry out the milling chamber lighting PC board on both sides 6 Pull off connector X1 7 Plug connector X1 into the new PC board 8 Insert the new PC board on both sides until i...

Страница 67: ...67 Service Manual b 4 5 Replacing stepping motors Overview of stepping motors...

Страница 68: ...stepping motor with the toothed roller downwards Installing the stepping motor 1 Turn the gear wheels so that the previously marked teeth are aligned and push the stepping motor with the toothed roll...

Страница 69: ...motor TX 10 3 Pull out the stepping motor with the toothed roller Installing the stepping motor 1 Turn the gear wheels so that the previously marked teeth are aligned and push the stepping motor with...

Страница 70: ...aring the right left stepping motor Preparing the unit 1 Switch the milling unit on 2 Remove the block and instruments 3 Start the Service software 4 In the Test selection window select the Stepping m...

Страница 71: ...h the milling unit on 2 Remove the block and instruments 3 Start the Service software 4 In the Test selection window select the Stepping motors single step function 5 For Steps select the 100value 6 C...

Страница 72: ...ss the block stepping motor 4 Unscrew and remove the screws from the lower flap and take off the flap NOTICE If the motor is defective If you cannot move the motor using the service software you will...

Страница 73: ...rd A as of X3 2 Unplug the encoder cable from the stepping motor B 3 Remove the four screws from the stepping motor C 4 Loosen the two screws from the clamping flange E 5 Remove the motor by pulling i...

Страница 74: ...g flange is locked in the mounting fixture 3 Push the spindle above the gear wheel outwards and position the motor flush against the mounting fixture 4 Press the motor against the housing and screw th...

Страница 75: ...5 3 2 3 Fastening the stepping motor 1 Loosely attach the screws 2 Attach the power cable and the encoder cable 3 Attach the protecting cover using two screws 4 Start the service software 5 In the Tes...

Страница 76: ...Red Test not yet passed NOTICE Red or yellow fields during the test After the test all fields must be green If red or yellow fields are displayed repeat the test If red or yellow fields are still dis...

Страница 77: ...Preparation and Removing the motor unit Milling machine 3 Detach connectors GX1 BX1 and MX1 from the respective distribution board 4 Disconnect reed contact connector X5 5 Detach connector X1 from the...

Страница 78: ...e offset angled nipple for each of the 2 manifolds Then reattach the nipple holder to the manifold 10 Unscrew the 4 fastening screws from the milling machine with a 6 mm Allen key 11 Carefully lift ou...

Страница 79: ...o screw ground conductor A tight at the rear right Inserting the manifolds 3 Detach the nipple holder from each of the 3 manifolds and insert the offset nipple with the same color in each of the hoses...

Страница 80: ...ug 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 9 Fasten the cables with cable ties 10 In...

Страница 81: ...ll 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 2 Take out the fan unit and the cooling...

Страница 82: ...Crown 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 conne...

Страница 83: ...Insert the rails toward the front and screw on the rear rubber metal mountings B Taking out the chassis insert 3 Push through the hose with the suction connection underneath the metal bracket and rot...

Страница 84: ...Reattach all covers 4 8 Replacing the suction connection 4 8 1 Preparations 1 Pull the water tank out 2 Unscrew the front cover 4 8 2 Removing the chassis insert The removal of the chassis insert is...

Страница 85: ...t 3 Reinsert the tank 4 Reattach all covers 4 9 Replacing the light barrier Light barrier B axis 1 Remove the rear panel cover and the intermediate cover 2 Unscrew the metal bracket 2 screws TX 20 scr...

Страница 86: ...hose 4 Unscrew the air pump from the mount 3 screws TX10 Installation 1 Apply a light coat of Loctite 221 sealer to the threads of the 3 fastening screws for the air pump 2 Screw the air pump onto the...

Страница 87: ...rs 4 11 Replacing the pressure switch 4 11 1 Water pressure switch 1 Remove all covers except for the right cover Water pressure switch 2 Pull the connector off of the pressure switch 3 Unscrew the pr...

Страница 88: ...right cover 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 5 Plug t...

Страница 89: ...r 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 Connect connector X8 of the...

Страница 90: ...s described in the chapter Removing the milling machine 2 Disconnect power supply connector X10 3 Unscrew the air pump mount 3 screws TX20 Water pump 4 Unscrew the water pump 4 screws 7 mm torque wren...

Страница 91: ...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...

Страница 92: ...r the left cover 2 Pull off connector X15 3 Unscrew the defective display 4 Screw on the new display 5 Plug in connector X15 6 Reattach all covers NOTICE Display is deforming If you tighten the screws...

Страница 93: ...ck the Adjustment button The motors move to the adjustment position of the plunger pin 5 Open the milling chamber door Plunger pin 6 Turn the DC motor manually in such a way that the plunger pin does...

Страница 94: ...s into position 12 o clock position to insert the set screw A dialog box prompts you to replace the set screw and close the processing chamber door again 6 Remove the worn set screw using the block cl...

Страница 95: ...ut and insert it into the same position on the new board Repeat for all connectors 3 Unscrew the screw A 4 Press the holding clips B together and remove the board 5 Slide the new distribution board ov...

Страница 96: ...96 MyCrown Mill 5 Using the cleaning set C o n t e n t s 5 1 Cleaning the manual block clamp 97 5 2 Milling instruments without chuck 97...

Страница 97: ...ng instrument 2 Clean the inside of the clamping cone with a pointed cotton swab and undiluted ethanol commercially available cleaning alcohol When doing this rotate the cotton swab counterclockwise i...

Страница 98: ...FONA Dental s r o Stefanikova 7 SK 811 06 Bratislava Slovakia K K MQKOMNT 66 18 867 D 3439 076 04 01 j W p a p d e c PNI a J SQSOR _ I d K K...

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