Mitsubishi Electric MDS-B - Manuals

VI (3) Trial operation and adjustment CAUTION Check and adjust each parameter before starting operation. Failure to do so could lead to unforeseen operation of the machine. Do not make remarkable adjustments and changes as the operation could become unstable. (4) Usage methods CAUTION Install an ext...

VII (6) Maintenance, inspection and part replacement CAUTION Carry out maintenance and inspection after backing up the servo amplifier programs and parameters. The capacity of the electrolytic capacitor will drop due to deterioration. To prevent secondary damage due to failures, replacing this part ...

i Contents Chapter 1 Outline 1-1 Outline ..................................................................................................................... 1-2 1-2 Features................................................................................................................... 1-2 Chapt...

ii 6-3-2 Type configuration .......................................................................................... 6-7 6-3-3 List of specifications........................................................................................ 6-7 6-3-4 Outline dimensions ..................................

iii (1) Command polarity/feedback polarity (SV017: SPEC) ............................... 9-3 (2) Servo specifications (SV017: SPEC) ........................................................ 9-4 (3) Ball screw pitch (SV018: PIT).................................................................... 9-4 (...

1–1 Chapter 1 Outline 1-1 Outline .......................................................................................................... 1-2 1-2 Features ........................................................................................................ 1-2

Chapter 1 Outline 1–2 1-1 Outline In recent years, demands for high accuracy, high speed and high efficiency have increased in the field of machine tools. The application of a linear servo for the feed axis has increased as a measure to respond to the demands. With the linear servo system, high spee...

2–1 Chapter 2 Drive System Configuration 2.1 Basic system configuration ........................................................................ 2-3 2-2 List of units and corresponding linear motors ......................................... 2-4 2-3 Linear motor drive system ............................

Chapter 2 Drive System Configuration 2–2 WARNING All wiring work must be carried out by a qualified electrician. Wait at least 10 minutes after turning the power OFF, before starting wiring or inspections. Failure to observe this could lead to electric shocks. Install the servo amplifier and linear ...

Chapter 2 Drive System Configuration 2–3 2.1 Basic system configuration Example: One spindle axis + two rotary servo axes + one linear servo axis MC NF For control circuit power supply (RS) 200VAC MDS- B-AL 3ø 200VAC for main circuit power supply 8 8 8 8 8 8 8 8 Servo drive unit(two axes)MDS-B-V24 S...

Chapter 2 Drive System Configuration 2–4 CAUTION 1. In a system having a spindle drive unit, always place the spindle drive unit next to the power supply unit as shown in the drawing. Also, place the servo drive unit 11kW and above next to the power supply unit. 2. When also using a spindle drive un...

Chapter 2 Drive System Configuration 2–5 2-3 Linear motor drive system CAUTION 1. With the linear servo system, the linear motor is assembled into the machine, and the position detector (linear scale) is also installed when the machine is assembled. Thus, it is not possible to know the motor pole po...

Chapter 2 Drive System Configuration 2–8 2-3-2 Configuration of parallel drive system The system configuration when driving one axis with two motors and two servo drive units is as shown below. In this case, the position command sent to each servo drive unit must be the same position command using t...

3–1 Chapter 3 Selection 3-1 Selecting the linear servomotor ................................................................. 3-2 3-1-1 Max. feedrate ....................................................................................... 3-2 3-1-2 Max. thrust ...........................................

Chapter 3 Selection 3–2 3-1 Selecting the linear servomotor It is important to select a linear servomotor matched to the purpose of the machine that will be installed. If the linear servomotor and machine to be installed do not match, the motor performance cannot be fully realized, and it will also ...

Chapter 3 Selection 3–3 During acceleration: Speed – acceleration During deceleration: Speed – acceleration Servo response characteristics Servo response characteristics Max. speed 120m/min, PGN1 = 47 (SHG) Max. speed 120m/min, PGN1 = 47 (SHG) 0 20 40 60 80 100 120 0 5 10 15 20 25 30 35 40 Velocity ...

Chapter 3 Selection 3–4 3-1-3 Continuous thrust A typical operation pattern is assumed, and the motor's continuous effective load thrust (Frms) is calculated from the load force. If numbers (1) to (8) in the following drawing were considered a one cycle operation pattern, the continuous effective lo...

Chapter 3 Selection 3–5 (2) Unbalance axis load force When operations (1) to (8) are for an unbalance axis, calculate so that the following forces are required in each period. Note that the forward speed shall be an upward movement. Table 3-2 Load thrusts of unbalance axes Period Load thrust calcula...

Chapter 3 Selection 3–6 3-2 Selecting the power supply unit Compared to the normal rotary motor, when using the linear servo system, the instantaneous output, such as the acceleration/deceleration, is large in respect to the continuous operation. Furthermore, this system is used in applications wher...

4–1 Chapter 4 Linear Servomotor Specifications 4-1 Type configuration....................................................................................... 4-2 4-2 List of specifications ................................................................................... 4-3 4-3 Speed – torque chara...

Chapter 4 Linear Servomotor Specifications 4–2 4-1 Type configuration The type indication for the linear servomotor differs for the primary side and secondary side. (1) Primary side LM – N P 1) 2) – 3) 4) – 5) (2) Secondary side LM – N S 1) 0 – 2) – 3) CAUTION ∗ The combination of the primary side a...

Chapter 4 Linear Servomotor Specifications 4–3 4-2 List of specifications Type Item LM- NP2S-05M LM- NP2M-10M LM- NP2L-15M LM- NP4S-10M LM- NP4M-20M LM- NP4L-30M LM- NP4G-40M Cooling method Unit Self- cool-i ng Oil-c ool-i ng Self- cool-i ng Oil-c ool-i ng Self- cool-i ng Oil-c ool-i ng Self- cool-i...

Chapter 4 Linear Servomotor Specifications 4–4 4-3 Speed – torque characteristics drawing (At input voltage 200VAC) 1500 0 0 60 120 500 m/min Th ru st Sh ort t ime usag erange Speed N 3000 1000 0 0 60 120 m/min Th ru st Sh ort t ime usag erange Speed N 4500 1500 0 0 60 120 m/min Th ru st Sh ort t im...

Chapter 4 Linear Servomotor Specifications 4–5 4-4 Dynamic brake characteristics When the system detects an abnormality, the motor stops the machine using the dynamic brakes. The machine's coasting amount at this time can be calculated with the following expression. Lmax = × [ 0.03 + M × { A + B × F...

Chapter 4 Linear Servomotor Specifications 4–6 4-5 Outline dimensions Primary side dimensions Changed dimensions Type L A B C n LM-NP2S-05M 290 55 55 3 × 2 2 LM-NP2M-10M 530 85 85 5 × 2 4 LM-NP2L-15M 770 70 70 8 × 2 7 Secondary side dimensions Changed dimensions Type L d n LM-NS20-360 360 4 × 2 3 LM...

Chapter 4 Linear Servomotor Specifications 4–8 Primary side dimensions Changed dimensions Type L A B C LM-NP4G-40M 1010 55 55 11 × 3 L A 90 B 50 15 23 20 75 75 210 178 40 C-M8 screw, depth 12 Cooling oil inlet/outlet2-PT3/8 screw Nameplate 10×90 Key position Power supply cannonconnectorMS3101A32-17P...

Chapter 4 Linear Servomotor Specifications 4–9 4-6 Explanation of connectors For LM-NP2 (S, M, L) For LM-NP4 (S, M, L) Pin symbol Lead wire side Pin symbol Lead wire side A B C U V For motor W A B C U V For motor W D E Grounding D E Grounding E F G1 G2 E F G1 G2 G H Blank G Blank (MS3102A22-23P) (MS...

Chapter 4 Linear Servomotor Specifications 4–10 For LM-NP4G Pin symbol Lead wire side Pin symbol Lead wire side A B C D U V For motor W Grounding A B G1 Thermal protector G2 (MS3101A32-17P) (MS3101A10SL-4P) CAUTION Connect the thermal protector lead wire parallel to the emergency stop circuit on the...

5–1 Chapter 5 Servo Drive Specifications 5-1 Type configuration....................................................................................... 5-2 5-2 List of specifications ................................................................................... 5-3 5-3 Overload protection specif...

Chapter 5 Servo Drive Specifications 5–2 5-1 Type configuration MDS-B-V14L- Capacity class symbol 01 03 05 10 20 35 45 70 90 110 150 Capacity (kW) 0.1 kW 0.3 kW 0.5 kW 1.0 kW 2.0 kW 3.5 kW 4.5 kW 7.0 kW 9.0 kW 11.0 kW 15.0 kW

Chapter 5 Servo Drive Specifications 5–3 5-2 List of specifications Amplifier type MDS-B-V14L- Capacity class symbol 01 03 05 10 20 35 45 70 90 110 150 Output voltage (V) 155 Continuous output current (A) 1.4 3.0 5.0 8.8 18.2 25.0 44.0 50.0 50.0 52.0 52.0 Max. output current (A) 3.9 8.1 17.0 28.0 42...

Chapter 5 Servo Drive Specifications 5–4 5-3 Overload protection specifications The servo amplifier has an electronic thermal to protect the servomotor and servo amplifier from overloads. The operation characteristics of the electronic thermal are shown below. If overload operation exceeding the ele...

Chapter 5 Servo Drive Specifications 5–5 Motor : LM-NP4L Servo amplifier : MDS-B-V14L-90 Motor : LM-NP4G Servo amplifier : MDS-B-V14L-110 When operating When stopped When operating When stopped T im e (s) T im e (s)

Chapter 5 Servo Drive Specifications 5–6 5-4 Outline dimensions d b c W = 60 (Front) (Installation) d b c W = 90, 120 (Installation) d b c W = 150 Rectan- gular hole (Installation) W Rectan- gular hole Rectan- gular hole 340 120 180 250 350 380 400 (Side) Insidepanel Outsidepanel Servo drive unit Fi...

Chapter 5 Servo Drive Specifications 5–8 5-5 Explanation of connectors and terminal blocks Name Application Remarks CN1A CN1B CN9 CN4 CN2 CN3 Connection of CNC and upward axis Connection of battery unit and downward axis Maintenance (normally not used) Connection with power supply Connection with mo...

Chapter 5 Servo Drive Specifications 5–9 5-6 Dynamic brake unit The MDS-B-V14L-110 and MDS-B-V14L-150 do not have built-in dynamic brakes. An external dynamic brake unit must be provided. 5-6-1 Connection of dynamic brake unit (1) For only dynamic brake unit (2) For dynamic brake unit + magnetic bra...

Chapter 5 Servo Drive Specifications 5–10 5-6-2 Outline dimensions of dynamic brake unit Type A B C D E F G Weight Applicable servo amplifier MDS-B-DBU-150 200 190 140 20 5 200 193.8 2kg MDS-B-V14L-110/150 5-7 Battery unit For the linear servo system, a battery-less linear scale (AT342, LC191M) is u...

6–1 Chapter 6 Detector Specifications 6-1 Linear scale .................................................................................................. 6-2 6-2 Scale I/F unit................................................................................................. 6-3 6-2-1 Outline ...........

Chapter 6 Detector Specifications 6–2 6-1 Linear scale The following types of scales can be used with the linear servo drive system. • Only some of the types are listed here. Note that the application may change due to changes in the specifications and termination of production by the scale maker. •...

Chapter 6 Detector Specifications 6–3 6-2 Scale I/F unit 6-2-1 Outline MDS-B-HR outline (1) The scale analog output source waves are interpolated to generate high resolution position data. This is effective for increasing the servo's high gain by increasing the detector's resolution. (2) The linear ...

Chapter 6 Detector Specifications 6–7 6-3 Pole detection unit 6-3-1 Outline Outline of MDS-B-MD (1) This unit detects the pole of the linear motor's secondary side magnet and outputs an analog voltage. When using an incremental specification scale, always install this unit. * Pole alignment when the...

Chapter 6 Detector Specifications 6–8 6-3-4 Outline dimensions 6-3-5 Explanation of connectors Connector name Application Remarks CON1 Connection with scale I/F unit (MDS-B-HR) Connector pin layout CON1 Pin No. Function 1 A phase signal 2 REF signal 3 B phase signal 4 REF signal 5 TH signal 6 P5 7 P...

7–1 Chapter 7 Installation 7-1 Installation of the linear servomotor .......................................................... 7-2 7-1-1 Environmental conditions ..................................................................... 7-3 7-1-2 Installing the linear servomotor ...........................

Chapter 7 Installation 7–2 CAUTION 1. The linear servo system uses a powerful magnet on the secondary side. Thus, caution must be taken not only by the person installing the linear motor, but also the machine operators. For example, persons wearing a pacemaker, etc., must not approach the machine. 2...

Chapter 7 Installation 7–3 7-1-1 Environmental conditions Environment Conditions Ambient temperature 0 ° C to +40 ° C (with no freezing) Ambient humidity 80% (RH) or less (with no dew condensation) Storage temperature –15 ° C to +50 ° C (with no freezing) Storage humidity 90% (RH) or less (with no d...

Chapter 7 Installation 7–4 (2) Installation of secondary side 1) Direction When using multiple secondary sides, lay the units out so that the nameplates on the products all face the same direction in order to maintain the pole arrangement. Nameplate 2) Procedures Install with the following procedure...

Chapter 7 Installation 7–5 7-2 Installation of the servo amplifier CAUTION 1. Always observe the installation directions. Failure to observe this could lead to faults. 2. Secure the specified distance between the servo amplifier and control panel, or between the servo amplifier and other devices. Fa...

Chapter 7 Installation 7–6 7-2-2 Drive section wiring system diagram Wire the power supply and main circuit as shown below. Always use a no-fuse breaker (NF) on the power supply input wire. Note 1: Each unit is provided with an earth bar. Do not tighten the grounding bar together with the other wire...

Chapter 7 Installation 7–7 7-2-3 Installing the unit (1) Each unit is designated to be installed in a cabinet such as a power distribution panel. Avoid installing the unit where it will be subject to direct sunlight, or near heating elements. (2) Keep the environmental conditions (temperature, humid...

Chapter 7 Installation 7–8 (5) Installing the cooling fan 1) Each unit (excluding type without fins) is provided with a cooling fan (FAN1 below). However, to maintain operation when the fan stops due to deterioration of the fan's ambient environment, and to improve the serviceability, the user shoul...

Chapter 7 Installation 7–9 7-2-5 Main circuit connection CAUTION 1. Always provide Class 3 grounding or higher for the servo drive unit and servomotor. 2. Correctly connect the power phases (U, V, W) of the servo drive unit and servomotor. Failure to do so could cause the servomotor to abnormally op...

Chapter 7 Installation 7–10 Precautions for connections (1) Each unit is provided with an earth bar. Do not tighten the grounding bar together with the other wires. (2) The wires and crimp terminals used differ according to the motor capacity. (3) Always ground the power supply. (4) The phase order ...

Chapter 7 Installation 7–12 7-2-7 Link bar specifications The link bar specifications are shown below. Wire usage Terminal block Details L+, L– Not possible M6 screw Connection wire for supplying the converter DC voltage from the power supply unit to each drive unit. L1+, L1– Possible M4 screw Conne...

Chapter 7 Installation 7–16 7-2-10 Installation for 2ch communication specifications with CNC, and installation of only one power supply unit. (2-system control) In this example, the following systems are explained. The same connection is used for other 2ch systems. • CH1: B-V14/V24/V14L + B-V14/V24...

Chapter 7 Installation 7–18 7-2-12 Connection with mechanical brakes Mechanical brake (magnetic brake) contact connection terminal (EM1, EM2) A brake terminal is provided on the MDS-B-V14L servo driver. When controlling mechanical brakes using this terminal, connect the magnetic brake cable to the C...

Chapter 8 Drive Section Connector and Cable Specifications 8–2 8-1 Cable connection system The cables and connectors shown below are those that can be ordered from Mitsubishi. Only the cable lengths designated in the table on the next page and following pages can be ordered. If cables with a special...

Chapter 8 Drive Section Connector and Cable Specifications 8–5 8-2 Cable connectors 8-2-1 Servo amplifier CN1A, CN1B and CN9 cable connector Maker: Sumitomo 3M <Type> Connector: 10120-6000EL Shell kit: 10320-3210-000 There is no option setting with this connector. This is a part integrally for...

Chapter 8 Drive Section Connector and Cable Specifications 8–10 8-2-6 Flexible conduits Basically, splash proofing can be ensured if cab-tire cable and connectors with IP65 or higher specifications are used. However, to further improve the oil resistance (chemical resistance to oil), weather resista...

Chapter 8 Drive Section Connector and Cable Specifications 8–11 8-3 Cable clamp fitting Install a grounding plate near the servo amplifier or scale I/F unit (MDS-B-HR), peel part of the detector cable sheath to expose the shield coat, and press that section against the grounding plate with a cable c...

Chapter 8 Drive Section Connector and Cable Specifications 8–12 8-4 Cable wire and assembly The following shows the specifications and processing of the wire used in each cable. Use the following recommended wires or equivalent part when manufacturing the cable, and make sure not to mistake the conn...

Chapter 8 Drive Section Connector and Cable Specifications 8–13 8-5 Cable connection diagram CAUTION Do not mistake the connection when manufacturing the detector cable. Failure to observe this could lead to faults, runaway or fires. 8-5-1 CNC unit bus cable <SH21 cable connection diagram> Thi...

Chapter 8 Drive Section Connector and Cable Specifications 8–17 8-5-5 Cable for scale I/F unit – pole detector <CNLH4MD cable connection diagram> This is an actual connection diagram for the CNLH4MD cable supplied by Mitsubishi. 8-5-6 Cable for I/F unit – motor thermal CAUTION 1. Do not connec...

9–1 Chapter 9 Setup 9-1 Initial setup of servo drive unit ................................................................... 9-2 9-1-1 Setting the rotary switches ................................................................... 9-2 9-1-2 Transition of LED display after power is turned ON ..........

Chapter 9 Setup 9–2 9-1 Initial setup of servo drive unit 9-1-1 Setting the rotary switches Before turning ON the power, the axis No. must be set with the rotary switches. The rotary switch settings will be validated when the servo driver (servo drive unit) power is turned ON. MDS-B-V14L   POINT Whe...

Chapter 9 Setup 9–3 9-2 Setting the initial parameters 9-2-1 Setting the initial parameters (1) Command polarity/feedback polarity (SV017: SPEC) Command polarity When the motor is to rotate in the clockwise direction (looking from the load side) when the command is used in the + direction, the comma...

Chapter 9 Setup 9–4 (2) Servo specifications (SV017: SPEC) The following parameters are set according to the system specifications such as the servomotor type, motor and driver (servo drive unit) combination, and absolute position system or incremental position system, etc. Name Abbrev. Details Sett...

Chapter 9 Setup 9–5 (5) Motor type (SV025: MTYP) Set the combination with SV017: SPEC spm in SV025: MTYP mtyp. Name Abbrev. Details Setting range (unit) SV017 SPEC Servo specifications HEX setting Name Abbrev. Details Setting range (unit) SV025 MTYP Motor/detector type HEX setting 1) Standard linear...

Chapter 9 Setup 9–6 2) Special linear motor SV017: SPEC = 7xxx SV025: Set the following Nos. in SV025: mtyp (bit 0 to bit 7). Cooling method Motor series No. 8x 9x Ax Bx Cx Dx Ex Fx x0 x1 x2 x3 x4 x5 x6 x7 x8 x9 xA xB xC xD xE xF (6) Detector type (SV025: MTYP) Set the following parameter according ...

Chapter 9 Setup 9–7 (7) Power supply type (SV036: PTYP) Name Abbrev. Details Setting range (unit) SV036 PTYP Power supply type HEX setting Refer to the following table and set SV036: PTYP ptyp. No. 0xKw 0x 1xKw 1x 2xKw 2x 3xKw 3x 4xKw 4x 5xKw 5x 6x 7x 0xKw 8x 0 PS not connected CV-300 1 CV-110 CR-10...

Chapter 9 Setup 9–9 9-2-4 List of standard parameters for each motor List of standard parameters for each motor Linear servomotor (self-cooling) Linear servomotor (oil-cooling) Motor LM-NP 2S-05 M LM-NP 2M-10 M LM-NP 2L-15 M LM-NP 4S-10 M LM-NP 4M-20 M LM-NP 4L-30 M LM-NP 4G-40 M LM-NP 2S-05 M LM-NP...

Chapter 9 Setup 9–10 9-3 Initial setup of the linear servo system The motor is driven by the magnetic force created by the coil and the magnetic force of the permanent magnet. Thus, it is necessary to comprehend at which pole of the permanent magnet the coil is located. With the conventional rotary ...

Chapter 9 Setup 9–11 (2) Feedback direction of linear scale The linear scales include the AT342 scale and Heidenhain scale, etc. The feedback direction of the AT342 scale is shown below. When moved to the left, looking from the direction with the detector head facing downward and the AT342 display f...

Chapter 9 Setup 9–14 <Adjustment methods> 1. Secure the distance (PIT) that the linear motor could move during DC excitation as shown on the right. 2. Set SV034/dcd to "1", and the setting values for starting DC excitation in SV061 to SV063. 3. Release the emergency stop. (DC excitatio...

Chapter 9 Setup 9–16 Flow chart for DC excitation and pole shift amount setting Y Start of adjustment   Set SV061: –250 SV062: –250 SV063: 500 Set SV034/dcd to "1"   Release the emergency stop   Confirm the motor movement and NC Servo Monitor MAX CURRENT 2 value.   Emergency stop   Increase ...

Chapter 9 Setup 9–18 (1) 2-scale 2-motor (2-amplifier) control (System using only main side (CN2 connector side) feedback) Setting parameter Master axis Slave axis SV017/fdir Normally, set the setting value for control. Normally, set the setting value for control. SV017/vdir2 Set 0. Set 0. SV025/pen...

10–1 Chapter 10 Adjustment 10-1 Measurement of adjustment data ........................................................... 10-2 10-1-1 D/A output specifications ................................................................. 10-2 10-1-2 Setting the output data ........................................

Chapter 10 Adjustment 10–2 10-1 Measurement of adjustment data The MDS-B-V14L servo driver has a function to D/A output the various control data. To adjust the servo and set the servo parameters that match the machine, it is necessary to use the D/A output and measure the internal status of the serv...

Chapter 10 Adjustment 10–3 10-2 Gain adjustment 10-2-1 Current loop gain No. Abbrev. Parameter name Explanation Setting range SV009 IQA Current loop q axis leading compensation 1 to 20480 SV010 IDA Current loop d axis leading compensation 1 to 20480 SV011 IQG Current loop q axis gain 1 to 4096 SV012...

Chapter 10 Adjustment 10–4 (2) Setting the speed loop leading compensation The speed loop leading compensation (SV008: VIA) determines the characteristics of the speed loop mainly at low frequency regions. 1364 is set as a standard, and 1900 is set as a standard during SHG control. The standard valu...

Chapter 10 Adjustment 10–5 10-2-3 Position loop gain (1) Setting the position loop gain The position loop gain (SV003:PGN1) is a parameter that determines the trackability to the command position. 47 (SHG control) is set as a standard. Set the same position loop gain value between interpolation axes...

Chapter 10 Adjustment 10–7 10-3 Characteristics improvement 10-3-1 Optimal adjustment of cycle time The following items must be adjusted to adjust the cycle time. Refer to the Instruction Manuals provided with each CNC for the acceleration/deceleration pattern. 1) Rapid traverse rate (rapid) : This ...

Chapter 10 Adjustment 10–9 (4) Adjusting the settling time The settling time is the time required for the position droop to enter the in-position width after the feed command (F ∆ T) from the CNC reaches 0. The settling time can be shortened by raising the position loop gain or using SHG control. Ho...

Chapter 10 Adjustment 10–11 (1) Machine resonance suppression filter The machine resonance suppression filter will function at the set frequency. Use the D/A output function to output the current feedback and measure the resonance frequency. Note that the resonance frequency that can be measured is ...

Chapter 10 Adjustment 10–12 (2) Adaptive filter (option function) The servo driver detects the machine resonance point and automatically sets the filter constant. Even if the ball screw and table position relation changes causing the resonance point to change, the filter will track these changes. Se...

Chapter 10 Adjustment 10–13 (2) Adjusting the speed loop leading compensation (VIA) The VIA has a large influence on the position trackability, particularly during high-speed cutting (generally F1000 or more). Raising the setting value improves the position trackability, and the contour precision du...

Chapter 10 Adjustment 10–15 <Adjustment method> First confirm whether the axis to be compensated is an unbalance axis (vertical axis, slant axis). If it is an unbalance axis, carry out the adjustment after performing step "(2) Unbalance thrust compensation". Next, measure the frictiona...

Chapter 10 Adjustment 10–16 (2) Unbalance thrust compensation If the load force differs in the positive and negative directions such as with a vertical axis or slant axis, the thrust offset (SV032:TOF) is set to carry out accurate lost motion compensation. <Setting method> Measure the unbalanc...

Chapter 10 Adjustment 10–17 (3) Adjusting the lost motion compensation timing If the speed loop gain has been lowered from the standard setting value because the machine rigidity is low or because machine resonance occurs easily, or when cutting at high speeds, the quadrant protrusion may appear lat...

Chapter 10 Adjustment 10–18 (4) Adjusting for feed forward control In LMC compensation, a model position considering the position loop gain is calculated based on the position command sent from the CNC, and compensation is carried out when the feed changes to that direction. When the CNC carries out...

Chapter 10 Adjustment 10–21   POINT 1. When either parameter SV031: OVS1 or SV042: OVS2 is set to 0, the same amount of compensation is carried out in both the positive and negative direction, using the setting value of the other parameter (the parameter not set to 0). 2. To compensate in only one d...

Chapter 10 Adjustment 10–23 (2) Acceleration feed forward Vibration may occur at 10 to 20 Hz during acceleration/deceleration when a short time constant of 30 msec or less is applied, and a position loop gain (PGN1) higher than the general standard value or SHG control is used. This is because the t...

Chapter 10 Adjustment 10–24 (3) Inductive voltage compensation The current loop response is improved by compensating the back electromotive force element induced by the motor feedrate. This improved the current command efficiency, and allows the acceleration/deceleration time constant to the shorten...

Chapter 10 Adjustment 10–25 10-4 Setting for emergency stop 10-4-1 Vertical axis drop prevention control The vertical axis drop prevention control is a function that prevents the vertical axis from dropping due to a delay in the brake operation when an emergency stop occurs. The servo ready OFF will...

Chapter 10 Adjustment 10–26 CAUTION 1. If 0 is set for both SV048 and SV055, the drop prevention function will be invalidated. 2. SV048 and SV055 are available for each axis, but if the values differ for two axes in the same driver, the larger value will be validated. 3. If only SV048 is set, the de...

Chapter 10 Adjustment 10–27 Tbd EMGrt EMGrt ＞ Tbd 0 EMGt EMGx Emergency stop Brake operation Tbd: Brake operation delay time Servo ON Detect in-positionand turn servo OFF Motor speed Deceleration command Emergency stop Brake operation Servo ON Tbd Tbd: Brake operation delay time Rapid traversespeed ...

Chapter 10 Adjustment 10–28 (3) Adjustment procedures • Set the drop prevention function parameters in the vertical axis servo parameters SV048, 055 and 056. 1) Set the vertical axis parameter SV048 (vertical axis drop prevention time) to 50, 100, ... while carrying out emergency stop, and set the v...

Chapter 10 Adjustment 10–30 2) When power supply control axis is vertical axis servo axis (Example: When both vertical axis and axis connected to power supply are Z axis) 2)-1: When vertical axis is 1-axis driver X axis (B-V14/V24) Y axis (B-V14/V24) Z axis (B-V14) Spindle (B-SP) Axis Parameter sett...

Chapter 10 Adjustment 10–33 10-4-2 Deceleration control Basically, this MDS-B-V14L servo driver carries out dynamic brake stopping when an emergency stop occurs. However, if the deceleration stop function is validated, the motor will decelerate according to the set time constant while maintaining th...

Chapter 10 Adjustment 10–34 (2) Dynamic brake stop When the deceleration stop function is not used, the dynamic brakes will be used to stop. In a dynamic brake stop, the dynamic brakes operate at the same time the emergency stop occurs, and the motor brake control output also operates at the same ti...

Chapter 10 Adjustment 10–35 <Setting and adjustment methods> 1. Confirm that SHG control is being used. 2. SV032: TOF Thrust offset Move the axis to be adjusted approx. F1000mm/mi with jog, etc., and check the load current on the [I/F DIAGNOSIS screen, Servo Monitor]. If the current load durin...

Chapter 10 Adjustment 10–37 10-6 Parameter list There are 64 servo parameters. The methods for setting and displaying the servo parameters differ on the CNC being used, so refer to the instruction manual for the respective CNC. Class Name Abbrev. Descriptions Setting screen B-Vx compa-t ibility Chan...

Chapter 10 Adjustment 10–39 Details of parameters No. Abbrev. Details Setting range (Unit) SV001 PC1 Set 1 for the linear motor system. 1 to 32767 SV002 PC2 Set 1 for the linear motor system. 1 to 32767 SV003 PGN1 Set the position loop gain in increments of 1. Normally, 47 is set. 1 to 200 (rad/s) S...

11–1 Chapter 11 Troubleshooting 11-1 Points of caution and confirmation .......................................................... 11-2 11-2 Troubleshooting at start up ...................................................................... 11-3 11-3 List of servo alarms and warnings ...................

Chapter 11 Troubleshooting 11–2 11-1 Points of caution and confirmation If an error occurs in the servo system, the servo warning or servo alarm will occur. When a servo warning or alarm occurs, check the state while observing the following points, and inspect or remedy the unit according to the det...

Chapter 11 Troubleshooting 11–3 11-2 Troubleshooting at start up If the CNC system does not start up correctly and a system error occurs when the CNC power is turned ON, the servo driver may not have been started up correctly. Confirm the LED display on the driver, and take measures according to thi...

Chapter 11 Troubleshooting 11–4 11-3 List of servo alarms and warnings No Abbrev. Name RS A/C No Abbrev. Name RS A/C 10 50 OL1 Overload detection 1 NR A 11 ASE Axis selection error AR V4 51 OL2 Overload detection 2 NR A 12 ME Memory error AR C 52 OD1 Excessive error 1 (at servo ON) NR A 13 SWE Softw...

Chapter 11 Troubleshooting 11–6 11-4 Alarm details Servo alarms No. Abbrev. Name Details RS A/C 12 ME Memory error An error was detected in the memory IC/FBIC during the self-check carried out when the driver power was turned ON. (Refer to 11-5. LED display Nos. at memory error.) AR C 13 SWE Softwar...

Chapter 11 Troubleshooting 11–7 No. Abbrev. Name Details RS A/C 49 SOSP Scale overspeed The absolute position liner scale connected to the MAIN side detected a speed of 45m/s or more when the CNC power was turned ON. PR A 4A SABS Absolute position detection circuit error An error was detected in the...

Chapter 11 Troubleshooting 11–8 11-5 LED display Nos. at memory error When a memory error (alarm 12) occurs, in most cases the connection with the CNC is not being executed. Normally, if the connection is not executed even when the connected with the CNC, check whether a memory error (alarm 12) has ...

Chapter 11 Troubleshooting 11–9 11-7 Troubleshooting for each servo alarm [Alarm/warning check timing] f1: When servo driver power is turned ON f2: When CNC power supply is turned ON (emergency stop ON) f3: During normal operation (servo ON) f4: During axis removal (ready ON, servo OFF) (Note) Note ...

Chapter 11 Troubleshooting 11–22 Alarm check timing f1 f2 f3 f4 Alarm No. 52 Excessive error 1: The difference of the ideal position and actual position exceeded the parameter SV023:OD1 (or SV053:OD3) at servo ON. – – { – Investigation details Investigation results Remedies The voltage is being supp...