Table of Contents
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SPECIFICATIONS ........................................
DRIVE SECTION BLOCK DIAGRAM ...........................
CABLES ................................................
2) CABLES ............................................
1) TRANSISTOR AMPLIFIER ..............................
POWER UNIT ........................................
1) TRANSISTOR AMPLIFIER CONNECTIONS ..................
2) CHECKPOINTS BEFORE SWITCHING ON POWER .............
CHECKPOINTS .......................................
3)
DESCRIPTION OF CHECK PINS .........................
DESCRIPTION OF PLUGS ..............................
CONNECTOR AND CHECK PIN LAYOUT ....................
7)
SETTING PLUG LAYOUT ...............................
INSPECTION AND ADJUSTMENT METHODS .....................
1) HOW TO MEASURE THE VOLTAGES AND CURRENTS ..........
2) TRANSISTOR AMPLIFIER INSPECTION ...................
5) RESOLVER FEEDBACK ADJUSTMENT ......................
MOUNTING THE DETECTOR .............................
CONTENTS
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Table of Contents
Related Manuals for Mitsubishi MELDAS TRS50
Summary of Contents for Mitsubishi MELDAS TRS50
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Page 1: Table Of Contents
CONTENTS SPECIFICATIONS ........DRIVE SECTION BLOCK DIAGRAM ......CABLES ..........2) CABLES ..........1) TRANSISTOR AMPLIFIER ......POWER UNIT ........REPLACING AND HANDLING THE TRANSISTOR AMPLIFIER ..1) TRANSISTOR AMPLIFIER CONNECTIONS ....2) CHECKPOINTS BEFORE SWITCHING ON POWER ..... CHECKPOINTS ........DESCRIPTION OF CHECK PINS ...... -
Page 2: Specifications
INTRODUCTION This manual outlines the maintenance procedures for using the It details the methods involved in replacing the transistor amplifiers as well as the inspection locations and adjustments, and it should thus be read before operating the AC servo system. Refer to the checkpoints before switching on the power. -
Page 3: Drive Section Block Diagram
a r e a (2) DRIVE SECTION BLOCK DIAGRAM MTR U MTR V MTR W BLOCK DIAGRAM OF TRANSISTOR AMPLIFIER I - - - - - (TYPE TRS) CON1 A X 1 4 c a r d From NC F r o m o t h e r... - Page 4 BLOCK DIAGRAM OF POWER UNIT Since transformers are not included in the power unit, the control unit and machine must be grounded. AC100 Power u n i t APO)
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Page 5: Cables
CABLES CABLE CONNECTIONS FIGURE D-10 Detector D-10 higher B-24 0.2 d B-20 0.5 d Transformer t h e B-16 control sionalb from CNA73 other amolifiers) to axis 5 TPA-2 3-ohase Notes 1 2 P (1) flake all the AC 100V cables B-20 or higher. the length of wiring between the + and - of the D-10 Hake... -
Page 6: Cables
CABLES name Cable Cable Connector model Contact BIRP-31112 connector detector cables ( f o r ARST) MRP-20MOl connector Connector MS3103B20-29 detector... - Page 7 Cable name Cable Connector model Case Housing MRP-20FOl Contact MRP-FI12 Case: Housing bfRP-5OFO MRP -F 112 CA 19-n (cable control signals) between NC unit...
- Page 8 Cable name Cable Connectar model Case Contact MRP -F112 Case: Contact MRP-F112 (cable for resolver signal) between NC unit and Connector model I O’ 5258-034 5 16 7P BT DUA- 1 'Dower unit Wire mark ontrol cable) Housing l-350355-9 Contact 350019-2 (Pin no.) Connector model R I O - 6...
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Page 9: Outline Drawings
OUTLINE DRAWINGS TRANSISTOR AMPLIFIER Note 1: Fin-cooling fans are not provided on the TRS50 or TRS75. -
Page 10: Power Unit
POWER UNIT Transformer Unit Domestic specifications Control number Export APU 15-M, 30-M, plate specifications 70-M, 72-M Outline drawinq of power unit... -
Page 11: Replacing And Handling The Transistor Amplifier
REPLACING AND HANDLING THE TRANSISTOR AMPLIFIER TRANSISTOR AMPLIFIER CONNECTIOk- AX04 Z J 3 Z P 2 ZP1 ZJ3 ZP2 ZPl Position sicfnal control cable unit * command To DUA-1 cable Dower unit To axis To axis To axis 3 detector 2 detector 1 detector A x i s... - Page 12 the next axis. Perform step (d) for each of the axes involved. Keep the S9 setting plug inserted for the head axis only; remove the plugs for all other axes. How to insert the TRA-1 and DUA-1 cables outside. Notes: Setting plugs and the adjustable variable resistors (VRs) are located on the control card and they should be adjusted when the unit is replaced.
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Page 13: Checkpoints Before Switching On Power
CHECKPOINTS BEFORE SWITCHING ON POWER Checkpoint Check whether the power unit P/N, AC 'transistor amplifier P/N and capacitor unit connections P/N connections have been made properly. The transformer tap selection (200/220V) is 2 Transformer made to the factory power supply. selection transformer) Motor... -
Page 14: Checkpoints
CHECKPOINTS Keep the detector mounted in the same position as when it was shipped; moving it will cause the control modes to undergo change. at the Do not touch the base amplifier top of the AX04 card because of its high voltage. Under no circumstances should the power unit be touched since the capacitor will... -
Page 15: Description Of Check Pins
DESCRIPTION OF CHECK PINS Item Check Signal Function 1 Control CH7 Servo ON Signal for checking servo ON/OFF. signal signal Servo OFF when low; ON when high. Pin for checking whether +24V is being unit con- trol sig- supplied to power unit. Speed back loop... - Page 16 Item Signal Function CH18 Current Indicates same as above for phase W. command loop (phase Current Indicates phase U current feedback feedbac signal. phase U Note: Detection resistance differs ac- cording to power unit. Output voltage with 1A current differs according to amplifier unit.
- Page 17 I t e m Check Signal Function Signal which controls U phase transis- CH21 Base ampli- fier tors (upper transistors) control signal Top/bottom transistor shorting preven- (phase U) tion period Transistor ON period Transistor period CH22 Base Signal which controls V phase transis- fier tors.
- Page 18 Item Check Signal Dither Dither For checking dither signal signal Trian- Trian- gular gular wave CH13 wave- CH14 form CH16 Resol- Resolver For adjusting amplitude of resolver Eeedback feedback. Adjusted with VR10. CH27 Resolver Signal produced by converting resolver Eeedback feedback signal into digital signal.
- Page 19 Item Check Signal Function 10 ovc This signal is produced by rectifying the U, V, W phase current and by converting the current from AC to DC. It can be used to check the response of the current loop at CH30. Note: CH30 current must be used with ap- propriate damping.
- Page 20 Item Check Signal Function Input signal of OCP circuit. input Detection resistance differs according to amplifier and so output per 1A also varies. Detection 3 1 mQ 0.031 R II A - 7 5 0.020 TRS 150 Ground OCP circuit ground Care is required since this ground is electrically insulated from AG/LG.
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Page 21: Description Of Vrs
DESCRIPTION OF VRS Item Check Signal Function 1 Speed Speed VR for command when motor is driven loop command by speed command. Switch ST1 is input switched from P to V for use. ment Integral VR for adjusting integral compensa- tion of speed loop. - Page 22 Item VR Check Signal Function Offset VR for adjusting position loop off- adjust- set. Position deviation is made ment zero with this VR. VR CH16 Amplitude VR for adjusting amplitude of sine adjust- waves fed back from resolver. adjust- Adjust to 12 +/-lVp-p. ment ments VR12 CH16 Amplitude VR for adjusting amplitude fluctua-...
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Page 23: Description Of Plugs
DESCRIPTION OF PLUGS Item Plug Function 1 Initial Normally inserted for external emergency stop settings uses. Removed when emergency stop is to be operated externally. Set when supplying +24V to power unit. be corrected by NC with servo OFF. For alarm; high-level signal is output to NC system when alarm state occurs. - Page 24 Function Item Plug Plug to add capacitor in compensation circuit Insert plug when selecting 22 k.'2 input re- 3 Position sistor of operational amplifier. loop Insert plug when selecting 100 kR input re- sistor of operational amplifier. Insert plug when selecting 200 kR input re- sistor of operational amplifier.
- Page 25 Plug Function Item TGOV S30 Used for switching TGOV level; 3000 rpm specification applies when plug is inserted. HA40 Used for HA40; torque command falls by in- eration serting plug. S27 Used for selecting OCP operating level; plug is inserted when HA40 is used. S28 Used for selecting OVC comparison level;...
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Page 26: Connector And Check Pin Layout
CONNECTOR AND CHECK PIN LAYOUT Current 1000 command siqnal ohase) ohase) control signal control sianal control sional Digital ground Level meter outout Resolver excitation feedback Resolver /Resolver feedback -Power unit control wave output - D i t h e r s i g n a l -Dither signal... -
Page 27: Vr Layout
VR LAYOUT Re-adjustment of these VRs is not necessary since they have already been set to the specifications of the machine builder when the unit was shipped from the manufacturing plant. Current loop offset (W loop offset NJ phase) Current loop offset W phase) gain (w Current loop phase) -
Page 28: Setting Plug Layout
SETTING PLUG LAYOUT Re-adjustment of these plugs is not necessary since they have already been set to the specifications of the machine builder when the unit was shipped from the manufacturing plant. S27: OCP level selection s26: triangular (inserted with wave selection level selection... -
Page 29: Inspection And Adjustment Methods
INSPECTION AND ADJUSTMENT METHODS HOW TO MEASURE THE VOLTAGES AND CURRENTS Motor voltage measurement Since the voltage output from the transistor amplifier to the motor is PWM-controlled, it appears in the form of pulsive The value of the voltage indicated may differ greatly waveforms. - Page 30 2. Motor current measurement Due to the reactance of the motor, the current is somewhat smoothed from pulsive waveforms into sine waves. Therefore, connect a moving-iron type of ammeter for measurement. of ammeter Transistor amplifier V (ii) Besides the method outlined in (i), the motor current can be measured by the voltage of CH34-AG on card AX04.
- Page 31 When is shorted Transistor amplifiel Setting CH34 voltage V/Arms plug s3 TRS50 TRS75 o denotes shorted.
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Page 32: Transistor Amplifier Inspection
TRANSISTOR AMPLIFIER INSPECTION Operating display lamps Function Lamp RDY (RAl) For checking NC READY status Lights with READY ON. For checking whether servo is Lights with servo ON. SVON (RA2) ON or OFF. DBL (RAB) For checking dynamic brake Lights when brake is operation. - Page 33 The alarms are detailed below: Instantaneous power failure compensation/under-voltage compensation (LVAL) The circuitry is protected when the supply voltage is instantaneously cut off or when the voltage drops to an abnormally low level. Instantaneous overcurrent detection (OCP) The transistors are protected when an overcurrent momentarily flows to the transistors in the circuitry.
- Page 34 6 Power unit alarm (PUAL) Power unit alarm display. Refer to the section on INSPECTION OF POWER UNIT for further details of the alarm. 7 Fin overheating (F.OH) Protection is provided when an overcurrent flows to the circuitry and the fin mounted on transistors overheats. 8 Motor overload (M.OH) Protection is provided when motor is overloaded and it overheats.
- Page 35 (2) Check whether the connections inside the amplifier have been made improperly and whether any screws are loose. (1) Check whether a higher current than the rating is flowing to the motor. (2) Check that the AX04 card settings have been made properly. TGOV (1) Check that the AX04 card settings have been made properly.
- Page 36 (2) Check if any units other than the power transistors are generating heat. (1) Check whether the motor is generating heat and measure the armature current. If the current is high, check whether the proper motor has been selected. If the motor is not hot, disconnect Gland G2 on the ampli- fier's terminal block and use a multimeter to check whether...
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Page 37: Power Unit Inspection
POWER UNIT INSPECTION operation status displays and alarm display lamps Power control card) Description of display Name Lamp P i l o t Lights when voltage of rectifier unit is approx. w h e n a p p r o x . 40-50V. touch since capacitor is still charged Do NOT Lights when +24V is supplied by DUC-1 cable... - Page 38 Description of power unit check pins Description of signal Signal Check pin DC +24V is output at same time as +24V is supplied from NC system to amplifier. At this time, LED1 (green) lights. Low-level signal (normally* open) when alarm At this time, one occurs inside power unit.
- Page 39 Power unit card NFB AL!4 FUSE Control card (TR-115)
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Page 40: Position Loop Offset And Droop Adjustments
POSITION LOOP OFFSET AND DROOP ADJUSTMENTS Item Adjustment Remarks 1 Display screen 5 with ALARM/DIAGNOSIS adjust- control at NC side. (With MQ) aent 2 Check that NC READY signal appears. 3 Adjust VR7 on AC transistor ampli- fier and set POSITION DROOP to +/-2. Droop 1 Display screen 5 with ALARM/DIAGNOSIS adjust-... - Page 41 Item Adjustment 6 Feed other axes so that position droo is made (+) and adjust to within +/-1% of droop adjusted in (51..
- Page 42 POSITION LOOP OFFSET AND DROOP ADJUSTMENTS Item Adjustment Remarks Offset 1 Display screen 5 with ALARM/DIAGNOSIS adjust- (With MQ) ment Check that NC READY signal appears. 3 Adjust VR7 on AC transistor ampli- fier and set POSITION DROOP to +/-2. 1 Display screen 5 with ALARM/DIAGNOSIS control at NC side.
- Page 43 Remarks Item Adjustment 6 Feed other axes so that position droop is made (+) and adjust to within +/-1% of droop adjusted in (S),.
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Page 44: Resolver Feedback Adjustment
RESOLVER FEEDBACK ADJUSTMENT Adjustment Remarks Item 1 Measure check pin TPl on GX96 card using synchroscope. back voltage 2 Voltage should range from 8Vp-p to Short-circuit S5 if higher check than 13Vp-p. 1 Obtain highest and lowest points of waveform at check pin TPl, set volt- tude fluctua- age range to 0.2V/DIV and set time tion... -
Page 45: Mounting The Detector
MOUNTING THE DETECTOR The motor's magnetic pole position (magnet position) must be Therefore, the detector is detected in the AC servo system. The method mounted differently from that in a DC servo system. . . 3. &':' is shown below. Detector mounting surface Fig. - Page 46 Installation method Install the O-ring (S75) to the sensor flange. Install an M4 hexagonal bolt with hole to the coupling. Align the motor shaft key with key groove in the sensor bellows Align the sensor positioning mark with the motor mark off line. Install the sensor to the motor (using M5xO.8 screws).