FANUC SYSTEM 6T-MODEL B - Maintenance Manual - General - CNC

Oct 29, 2026

Upload by miraaa_2004

FANUC SYSTEM 6T-MODEL B Maintenance Manual provides preventive maintenance guidance and troubleshooting procedures for a fixed-software, high-accuracy turning CNC. It explains the system structure and construction, the role of periodical maintenance and maintenance equipment, and methods for diagnosing faults using alarms and self-diagnostic (DGN) status displays. The manual also covers adjustment steps, parameter setting workflows, PCB setting for control and servo units, and required connection diagrams and maintenance appendices.

LanguageEnglish

CategoryTechnology

FormatPDF

Pages389

Reading Time16 h 20 min

AccessFree to download

GENERAL

Structure

Construction

PERIODICAL MAINTENANCE AND MAINTENANCE EQUIPMENT

Periodical maintenance

Maintenance equipment

Spare parts

TROUBLE SHOOTING

Procedures

Alarm list

Checking and countermeasures

Power supply voltage checking

Tape reader photo-amplifier adjustment

Connection diagram inside the NC

Status display by self-diagnostic function (DGN)

Block diagram of servo system

Confirmation of connections

ADJUSTMENT

Procedure of adjustment

Connection of power supply

Frequency setting for velocity control unit

SETTING OF PARAMETERS

Display and setting procedures

Parameter table

Details of parameters

Parameter initial setting data

SETTING OF PCB

Control section PCB

Velocity control unit

DC spindle servo unit PCB

AC spindle servo unit PCB

Spindle orientation adjustment

APPENDIX

Connection diagrams

Connection between NC and servo motor

Detailed description of power stabilizing unit

FANUC SYSTEM 6T-MODEL B MAINTENANCE MANUAL CONTENTS 1. GENERAL................................ ........................·1 1.1·Structure .............................................2 1.2 Construction ................................................ 6 2. PERIODICAL MAINTENANCE AND MAINTENANCE EQUIPMENT....................11 2.1 Periodical maintenance ............:...... .................11 2.2 Maintenance equipment...............................21 2.3 Main of spare parts.....................................21 3.TROUBLE SHOOTING .....................................22 3.1Procedures ........................................22 3.2Alarm list .............................................23 3.3Checking and countermeasures .....................................61. 3.4Power supply voltage checking ..........................................74 3.5Tape reader photo-amplifier adjustment ...................................81 3.6Connection diagram inside the NC.........................................84 3.7Status display by self-diagnostic function(DGN)...............................88 3.8Block diagram of servo system ...........................................107 3.9Confirmation of connections between control and velocity control ...................118 3.10 Confirmation of connections between NC and DC motor..........................134 3.11 Trouble shooting for servo unit...........................................135ADJUSTMENT ........................................................147 ,4. 4.1 Procedure of adjustment ...............................................147 4.2Connection of power supply.............................................154 4.3Frequency setting for velocity control unit...................................160 5.SETTING OF PARAMETERS..........2................................161 5.1Procedure of display of parameters........................................161 5.2Procedure of setting parameters...........................................162 5.3Parameter table.....................................................164 5.4Details of parameters.................................................170 5.5Parameter initial setting data............................................208 6. SETTING OF PCB ……………………………………………………………………………………………………………………………………………210 6.1 Setting and adjustment for control section PCB …………………………………………………………………………………211 6.2 Setting and adjustment for velocity control unit……………………………………………………………………………………………230 6.3 Setting and adjustment for DC spindle servo unit PCB………………………………………………………………………………236 6.4 Setting and adjustment for AC spindle servo unit PCB………………………………………………………………………………244 6.5 Adjustment of spindle orientation…………………………………………………………………………………………………252 APPENDIX Connection diagrams……………………………………………………………………………………………………271 Appendix 1 Connection between NC and servo motor …………………………………………………………………………………………………298 Appendix 2 Detailed description of power stabilizing unit……………………………………………………………………………………………311 Appendix 3 Adjustment method of velocity control unit ……………………………………………………………………………………………330 Appendix 4 Parts specification of velocity control unit…………………………………………………………………………………………………339 Appendix 5 Maintenance for DC servo motor…………………………………………………………………………………………………………………344 Appendix 6 Maintenance for character display unit ………………………………………………………………………………………………………359 Appendix 7 Operation table …………………………………………………………………………………………………………………………………………365 Appendix8 Tape code used for programming……………………………………………………………………………………………………………368 Appendix 9 G function table…………………………………………………………………………………………………………………………………………………370 Appendix 10 Table fo range of command value ………………………………………………………………………………………………………………372 Appendix 11 Status at turning power on and reset …………………………………………………………………………………………………………374 Appendix 12 Bubble memory initialize…………………………………………………………………………………………………………………………376

FAQs

What kind of CNC system is FANUC SYSTEM 6T-MODEL B described as?

It is a high-accuracy, high-performance fixed-software CNC for turning machines, using a closed-loop configuration with FANUC DC servo motors and a pulse encoder as the detector.

How does the system help maintenance during trouble conditions?

It includes a self-diagnostic function that monitors internal operating conditions, displays classification of the condition, shows alarm messages immediately on trouble, and stops the NC while presenting detailed trouble information.

What maintenance areas does the manual cover beyond troubleshooting?

It covers periodical maintenance and maintenance equipment, adjustment procedures, parameter display and setting workflows, and PCB setting and adjustment for control and servo-related units, with connection diagrams and additional reference tables in the appendix.

Oct 29, 2026

Upload by miraaa_2004