Koro/korinto Grinder - VE Global Solutions
Contents
1. All rights reserved COFFEE GRINDER UNIT KORO 29 11 2005 Page 4 5 DI SASSEMBLY PROCEDURE FOR PERI ODI C MAI NTENANCE Remove the unit from the machine after removing the side and upper Remove the ground coffee feeder Slide out casing undo the front fastening screw the seeger ring and completely unscrew the and slide out upwards FIG 1 2 knurled knob until removing it Completely unscrew the upper grinding wheel until removing it completely Check the state of wear of the O ring wade ine Fishes Nexadadelseles Detail of grinding wheel components clockwise holding the spring and the Pulling upwards completely remove the eal ease ridsrance wacher rae an completely disassembled for checking EST QUEEN Se ie wear and replacement Detail of grinding wheel seat with view of anti thrust bearing Undo the 4 lower self tapping screws fastening the grinding wheel seat Slightly forcing remove the grinding wheel seat to access the lower bearing Coffee grinder without grinding wheels view of the reducer conical gear and pinion NOTE After the scheduled maintenance and or replacements clean all parts replace the seal rings that are worn and or damaged Lubricate with specific grease and reassemble all parts following the reverse order N amp W GLOBAL VENDING SPA SERVICE MANUAL FUNCTIONAL UNITS H amp C This document was produced by MARK AC for the exclusive use of the technical personnel of NW GLOBAL VENDING2. Front view without dose sensor The correct disassembly operations for periodic maintenance are described at page 5 GRI NDI NG WHEELS AND OTHER ACCESSORI ES Lower grinding wheel w X Grinding wheel spring and lock nut Grinding adjustment knob Upper grinding wheel Anti thrust bearing N amp W GLOBAL VENDI NG SPA SERVI CE MANUAL FUNCTI ONAL UNITS H amp C This document was produced by MARK AC for the exclusive use of the technical personnel of NW GLOBAL VENDING No part of this document may be divulged to a third party or reproduced partially or entirely without the prior permission of NW GLOBAL VENDING All rights reserved COFFEE GRI NDER UNIT KORO 29 11 2005 Page 3 5 EXPLODED VI EW OF COFFEE GRINDER ASSEMBLY KORO Grinding wheel BN ee screw spring and washer p Grinding wheel holder O ring seal Upper grinding wheel Lower grinding wheel Grinding wheel holder fan Anti thrust bearing and support washers Coffee ring seal 77mm Grinder unit cover Ball bearing Adjustment knob ae S a At f AAA a N Conical gear Commutator motor as N T Re d ehawWNye Ball bearing support flange Ball bearing Reducer support Conical pinion P A i lt 1 Er NS Coffee dose sensor N amp W GL ik This docur No part of this document may be divulged to a third party or reproduced partially or entirely without the prior permission of NW GLOBAL VENDING
3. GLOBAL VENDING AFTER SALES SERVICE SERVI CE MANUAL COFFEE GRINDER UNIT FOR THE KORO N amp W GLOBAL VENDING SPA SERVICE MANUAL FUNCTIONAL UNITS H amp C This document was produced by MARK AC for the exclusive use of the technical personnel of NW GLOBAL VENDING No part of this document may be divulged to a third party or reproduced partially or entirely without the prior permission of NW GLOBAL VENDING All rights reserved COFFEE GRINDER UNIT KORO 29 11 2005 Page 1 5 COFFEE GRINDER UNIT KORO The coffee grinder unit was specifically designed for the KORO vending y F j machine Fi f h The main feature is the reduced height for easy positioning and for taking up less space because of the smaller size of the KORO machine In addition the coffee dose is determined by means of a special sensor FIG based on two parameters the time and number of revolutions of the grinding wheels The vending machine software determines the coffee amount needed for the required selection according to preset algorithms The system Is driven by a very efficient and reliable commutator motor The motor was tested according to the reliability and duration to allow at least 100 000 selections before servicing the commutator and the brushes The motor is coupled to the grinder doser by means of a reduction system with bevel gear made of high strength thermoplastic material FIG The grinder was designed with high efficiency
4. No part of this document may be divulged to a third party or reproduced partially or entirely without the prior permission of NW GLOBAL VENDING All rights reserved COFFEE GRINDER UNIT KORO 29 11 2005 Page 5 5
5. coffee to be ground are disabled while the selections iM based on the single dose decaffeinated coffee manually inserted in _ i r the special compartment remain enabled POSSI BLE FAULTS The system can ensure a long operating life of approximately FIG 5 100 000 grinding cycles before needing any maintenance on the COFFEE GRI NDER UNIT motor and reducer unit Front view without feeder THE GRI NDI NG WHEELS have an operating life of approximately 50 000 cycles using high quality coffee However some low quality coffee may contain bits of wood or pebbles which could cause anomalous wear or damage to the blade teeth In this case the duration could change considerably IN THE EVENT of excessively fine grinding over time coffee dust could penetrate in the reducer bearing and gear compartment causing anomalous noise Disassemble clean and lubricate the affected areas with specific products WITH WEAR and settling the distance between the grinding wheels increases therefore it is necessary to check the grade of grinding periodically to avoid the production of non conforming coffee quality considering that the sensor can assess the number of revolution and the time related to quantity parameters but not the quality directly FAI LURE to the sensor if the display indicates lack of coffee or blocked motor but in effect all is correct Check the functioning of the dose sensor FIG 6 FIG 6 COFFEE GRI NDER UNIT
6. e container Swinging zone for expellin with opening sensor ging Poun ground coffee Ges FIG 4 eOrEEE GRIER Compcerele COFFEE GRINDER WITHOUT COFFEE CONTAINERS REMOVED FROM THE MACHINE N amp W GLOBAL VENDING SPA SERVICE MANUAL FUNCTIONAL UNITS H amp C This document was produced by MARK AC for the exclusive use of the technical personnel of NW GLOBAL VENDING No part of this document may be divulged to a third party or reproduced partially or entirely without the prior permission of NW GLOBAL VENDING All rights reserved COFFEE GRINDER UNIT KORO 29 11 2005 Page 2 5 SAFETY DEVICES The motor is protected from overheating with a special self reset klixon fitted on the winding In the event of blockage caused by foreign matter between the Grinding adjustment knob grinding wheels the klixon upon reaching a temperature of 120 C is N tripped thus disconnecting the power supply to the motor The system is self resetting and is reactivated automatically when the correct temperature condition is restored It is therefore important in the event of blockage and tripping of Ai the overheating protection to remove the power supply cable and a og Sere ak Epp eal ee ugi i k E manually free the grinding wheels k a g In the event of a blockage the sensor does not detect any rotation Bog d d w and therefore it informs the software of the event and the selections a el A based on the
7. flat grinding wheels 7 a VIEW OF COFFEE GRINDER IN OPERATING The solut f flat heel t th e solution of flat grinding wheels was determined by the need of POSITION INSIDE THE KORO having greater grinding velocity with low pick up torque l i On the other hand conical grinding wheels produce a higher quality of from above without casing ground coffee at a lower velocity but the motor must have a higher ra pick up torque and the time will increase and thus increase the selection time Such grinder allows ground coffee doses of 7 grams in a maximum time of 5 seconds with default grade of grinding In addition it is possible to set selections with different coffee doses simply by changing the software setting The system with sensors permits accurate doses with a maximum variation of 01 grams as long as the distance between the grinding wheels is kept constant to compensate wear and settling The special coffee bean hopper allows also the dispensing of decaffeinated coffee by inserting a single dose of ground coffee in the special compartment FIG 3 The compartment door is fitted with a sensor that when it is opened for inserting the single dose will cause a message to be shown on the display and at the same time switch off the grinding FIG 2 VIEW OF COFFEE GRINDER IN OPERATING POSITION INSIDE THE KORO View from the side without casing Coffee beans hopper Single dose ground decaffeinated coffe
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